JP2006065794A - Three-dimensional shape display device, three-dimensional shape display method, and program making computer implement the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set optimum display magnification for displaying a three-dimensional shape model. <P>SOLUTION: This device comprises a mode changing part changing the mode of the three-dimensional shape model displayed on a display, a display magnification calculation part calculating display magnification in the case that the mode of the three-dimensional shape model is changed based on a coordinate to which a coordinate showing the position of a part drawing a user's attention is projected in a plane including a display range for projecting the three-dimensional shape model and the display range, and a display processing part contracting the three-dimensional model with the calculated display magnification and displaying it on the display. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a three-dimensional shape display device, a three-dimensional shape display method, and a program for causing the computer to execute the method, and in particular, a display magnification based on a change in an aspect of a three-dimensional shape model displayed on the display device. It is related to the technology to change.

  Conventionally, when a 3D shape model is displayed on a 3D CAD or the like, the aspect of the 3D shape model is changed due to movement of the viewpoint or the like, so that the part that the user has focused on is outside the display range. In this case, it is difficult for the user to grasp the shape of the three-dimensional shape model. For this reason, the user needs to reduce the display magnification in order to grasp the three-dimensional shape model, which is troublesome. In addition, the user often cannot determine how much the display magnification can be reduced to see the portion that the user has noticed. Furthermore, when the user sets the display magnification, and when the three-dimensional shape model is displayed after being reduced to the set display magnification, even if the portion of interest of the three-dimensional shape model is displayed, the user However, it is difficult to set an optimum display magnification, for example, since the three-dimensional shape model is displayed in a reduced size and the details of the three-dimensional shape are difficult to grasp.

  In the two-dimensional display, a technique is disclosed in which the display magnification is changed so that the part that the user has noticed in the image does not fall outside the range of the display screen (for example, Patent Document 1). In this technology, when the user scrolls the display part of the image, the display magnification is changed based on the amount of movement of the scroll, so that the part that the user has noticed is always within the range of the display screen. Is possible.

JP-A-6-295328

  However, the above-described technique is effective for two-dimensional display, but cannot be directly applied to three-dimensional display. This is because, in a two-dimensional image, it is only necessary to consider the movement of the xy axes, and the portion of interest that has been noticed is always within the range of the display screen by simply changing the display magnification based on the movement amount of each axis. However, in the case of display of a three-dimensional shape, it is necessary to consider not only the xy axis but also the z axis, and rotational movement that does not exist in the two-dimensional display. There is a problem that even if the display magnification is changed based on the movement amount of the three-dimensional shape model or the like in the display range projected onto the display area, the portion that the user has paid attention to is not necessarily within the display screen range. In addition, when the display magnification is changed based on the movement amount by the above-described technique, even if the part that the user has been paying attention is displayed on the display screen, the movement that is unique to the three-dimensional region cannot be taken into consideration. There is a problem that the display magnification is not always set.

  For example, in the rotational movement of a three-dimensional shape, even if the display magnification is changed according to the movement amount that is the technique described above, the optimum display magnification is not set. That is, when the part of interest is rotated once and returns to the original position due to the rotational movement, it is different from the original display magnification. In the movement of the three-dimensional shape model existing in the three-dimensional area, it is necessary to consider the rotational movement that does not exist in the two-dimensional area in combination with the movement by the area obtained by adding the z axis to the xy axis. It becomes difficult to set an optimal display magnification by moving the three-dimensional region.

  The present invention has been made in view of the above, and the reference coordinates on the three-dimensional shape model are included in the display range, and the optimum display magnification for displaying the three-dimensional shape model is set. An object of the present invention is to provide a three-dimensional shape display apparatus and a three-dimensional shape display method that can be performed and a program that causes the computer to execute the method.

  In order to solve the above-described problems and achieve the object, the invention according to claim 1 is a mode change unit that changes a mode of a three-dimensional shape model displayed on a display device; When the shape model is changed, a predetermined display reference serving as a reference to be displayed after the change on the three-dimensional shape model in the two-dimensional region where the three-dimensional shape model is projected and displayed on the display device Display magnification calculation for calculating the display magnification for displaying the projection reference coordinates based on the projection reference coordinates whose coordinates are projected on the two-dimensional region and the display range displayed on the display device in the two-dimensional region. And display processing means for reducing the display magnification calculated by the display magnification changing means and displaying the three-dimensional shape model on the display device.

  The invention according to claim 2 is the invention according to claim 1, wherein the aspect changing means changes the aspect by rotating or translating the three-dimensional shape model.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the mode changing unit changes the viewpoint coordinates indicating the position of the viewpoint or the gazing point coordinates indicating the position of the gazing point to perform the display. The aspect of the three-dimensional shape model displayed on the apparatus is changed.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the display magnification calculating means is a predetermined reference that is displayed after the change on the three-dimensional shape model. A reference distance indicating a shortest distance from the projection reference coordinates on which the display reference coordinates are projected to a display center line that passes through the center of the display range in parallel with a boundary line that is a boundary of the display range of the display range; The display magnification is calculated based on the ratio of the display range distance from the boundary line to the display center line on a straight line parallel to the straight line indicating the reference distance.

  Further, the invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the display processing means is further reduced and displayed at the display magnification calculated by the display magnification calculation means. The display range before reduction indicating the display range is displayed.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the display magnification storage means for storing the display magnification calculated by the display magnification calculation means, and the display magnification storage. Display magnification switching means for switching the reciprocal of the display magnification stored in the means as a return display magnification, and the display processing means expands at the return display magnification switched by the display magnification switching means and A three-dimensional shape model is displayed.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the display magnification calculation means is configured such that the aspect of the three-dimensional shape model is changed by the aspect change means. In the two-dimensional region, a plurality of predetermined display reference coordinates on the three-dimensional shape model are projected onto the two-dimensional region, and a plurality of the projection reference coordinates are projected to the display device in the two-dimensional region. A display magnification at which a plurality of the projected coordinates are displayed is calculated based on the display range to be displayed.

  The invention according to an eighth aspect is the invention according to the seventh aspect, wherein the display magnification calculating means, in the two-dimensional region, when the aspect of the three-dimensional shape model is changed by the aspect changing means, A plurality of projection vertices based on a plurality of projection vertex coordinates in which each vertex of polyhedral data serving as a three-dimensional shape model is projected onto the two-dimensional region and the display range on the two-dimensional region. The display magnification at which the coordinates are displayed is calculated.

  The invention according to a ninth aspect is the invention according to the seventh aspect, wherein the display magnification calculating means, in the two-dimensional region, when the aspect of the three-dimensional shape model is changed by the aspect changing means, A plurality of projections based on a plurality of projection vertex coordinates in which the vertex coordinates indicating each vertex of a shape obtained by simplifying the three-dimensional shape model are projected on the two-dimensional region and the display range on the two-dimensional region. The display magnification at which the vertex coordinates are displayed is calculated.

  The invention according to claim 10 is the invention according to any one of claims 1 to 9, wherein the display form changing means changes the aspect of the three-dimensional shape model at predetermined time intervals. The display magnification calculation means is the display reference serving as a reference to be displayed on the three-dimensional shape model after the change in the two-dimensional area every time the aspect of the three-dimensional shape model is changed by the aspect changing means. Based on the projection reference coordinates whose coordinates are projected on the two-dimensional area and the display range on the two-dimensional area, a display magnification for displaying the projected coordinates is calculated, and the display processing means The three-dimensional shape model is displayed on the display device after being reduced at the display magnification calculated by the display magnification changing means for each predetermined time.

  The invention according to claim 11 is the invention according to any one of claims 1 to 10, wherein the display form changing means changes the mode of the three-dimensional shape model by interactive means with a user. It is characterized by changing.

  According to a twelfth aspect of the present invention, in the aspect changing step of changing the aspect of the three-dimensional shape model displayed on the display device, and when the aspect of the three-dimensional shape model is changed by the aspect changing step, the 3 Projection in which a predetermined display reference coordinate serving as a reference to be displayed after being changed on the three-dimensional shape model is projected onto the two-dimensional region in the two-dimensional region on which the three-dimensional shape model is projected and displayed on the display device Based on reference coordinates and a display range displayed on the display device in the two-dimensional area, a display magnification calculation step for calculating a display magnification in which the projection reference coordinates are included in the display range, and a display magnification change step A display processing step of reducing the calculated display magnification and displaying the three-dimensional shape model on the display device.

  The invention according to claim 13 is the invention according to claim 12, wherein the aspect changing step changes the aspect by rotating or translating the three-dimensional shape model.

  The invention according to a fourteenth aspect is the invention according to the eleventh or twelfth aspect, wherein the aspect changing step changes the viewpoint coordinates indicating the position of the viewpoint or the gazing point coordinates indicating the position of the gazing point to perform the display. The aspect of the three-dimensional shape model displayed on the apparatus is changed.

  According to a fifteenth aspect of the present invention, in the invention according to any one of the twelfth to fourteenth aspects, the display magnification calculating step is a predetermined reference that is displayed after the change on the three-dimensional shape model. A reference distance indicating a shortest distance from the projection reference coordinates on which the display reference coordinates are projected to a display center line that passes through the center of the display range in parallel with a boundary line that is a boundary of the display range of the display range; The display magnification is calculated based on the ratio of the display range distance from the boundary line to the display center line on a straight line parallel to the straight line indicating the reference distance.

  According to a sixteenth aspect of the invention, in the invention according to any one of the twelfth to fifteenth aspects, the display processing step is further performed before the image is reduced and displayed at the display magnification calculated in the display magnification calculating step. The display range before reduction indicating the display range is displayed.

  According to a seventeenth aspect of the present invention, in the invention according to any one of the twelfth to sixteenth aspects, a display magnification switching step of switching an inverse of the display magnification calculated in the display magnification calculating step as a return display magnification. , And the display processing step displays the three-dimensional shape model enlarged at the return display magnification switched in the display magnification switching step.

  The invention according to claim 18 is the invention according to any one of claims 12 to 17, wherein the display magnification calculation step is performed when the aspect of the three-dimensional shape model is changed by the aspect change step. In the two-dimensional region, a plurality of predetermined display reference coordinates on the three-dimensional shape model are projected onto the two-dimensional region, and a plurality of the projection reference coordinates are projected to the display device in the two-dimensional region. A display magnification at which a plurality of the projected coordinates are displayed is calculated based on the display range to be displayed.

  Further, the invention according to claim 19 is the invention according to claim 18, wherein the display magnification calculating step is performed when the aspect of the three-dimensional shape model is changed by the aspect changing step. A plurality of projection vertices based on a plurality of projection vertex coordinates in which each vertex of polyhedral data serving as a three-dimensional shape model is projected onto the two-dimensional region and the display range on the two-dimensional region. The display magnification at which the coordinates are displayed is calculated.

  Further, the invention according to claim 20 is the invention according to claim 18, wherein the display magnification calculation step is performed when the aspect of the three-dimensional shape model is changed by the aspect change step. A plurality of projections based on a plurality of projection vertex coordinates in which the vertex coordinates indicating each vertex of a shape obtained by simplifying the three-dimensional shape model are projected on the two-dimensional region and the display range on the two-dimensional region. The display magnification at which the vertex coordinates are displayed is calculated.

  The invention according to claim 21 is the invention according to any one of claims 12 to 20, wherein the display form changing step changes the mode of the three-dimensional shape model at predetermined time intervals. In the display magnification calculation step, the display reference serving as a reference to be displayed on the three-dimensional shape model after the change in the two-dimensional region every time the aspect of the three-dimensional shape model is changed by the aspect changing step. Based on the projection reference coordinates whose coordinates are projected onto the two-dimensional area and the display range on the two-dimensional area, a display magnification for displaying the projected coordinates is calculated, and the display processing step includes: Reducing the display magnification calculated by the display magnification changing step at each predetermined time and displaying the three-dimensional shape model on the display device; That.

  According to a twenty-second aspect of the present invention, in the invention according to any one of the twelfth to twenty-first aspects, the display form changing step changes the mode of the three-dimensional shape model by an interactive step with a user. It is characterized by changing.

  The invention according to claim 23 is characterized in that the method according to any one of claims 12 to 22 is executed by a computer.

  According to the first aspect of the present invention, the display magnification at which the display reference coordinates are displayed is calculated, and the three-dimensional shape model is displayed by reducing the display magnification to the calculated display magnification. It is displayed on the display device, so that the user can easily recognize the shape of the three-dimensional shape model. Further, by calculating the display magnification based on the projection reference coordinates obtained by projecting the display reference coordinates onto the two-dimensional area and the display range of the two-dimensional area, the calculated display magnification includes a portion that is noticed by the user. Since the display magnification is necessary and sufficient, an effect is obtained that an optimal display magnification is set for the user to grasp the three-dimensional shape model.

  According to the second aspect of the present invention, even if the aspect of the three-dimensional shape model displayed on the display device is changed by changing the viewpoint coordinates or the gazing point coordinates, the display reference Since the coordinates are included in the display range, the user can easily recognize the shape of the three-dimensional shape model.

  According to the invention of claim 3, even when the three-dimensional shape model is translated or rotated to change the aspect of the three-dimensional shape model displayed on the display device, the display reference Since the coordinates are included in the display range, the user can easily recognize the shape of the three-dimensional shape model.

  According to the invention of claim 4, the reference distance indicating the shortest distance from the projection reference coordinates to the center line of the display range, the display distance from the boundary line of the display range on the two-dimensional region to the display center line, By calculating the display magnification based on the ratio of, the calculated display magnification is the necessary and sufficient display magnification including the part that the user pays attention to, so it is optimal for the user to grasp the 3D shape model. The effect is that a large display magnification is set.

  Further, according to the invention according to claim 5, by displaying the display range before displaying the reduced display at the calculated display magnification, the user can visually recognize the display range before setting the display magnification, There is an effect that the change rate of the display magnification can be grasped.

  According to the invention of claim 6, the display reference coordinates are enlarged at the previous display magnification included in the display range by switching the inverse of the display magnification stored in the display magnification storage means as the return display magnification. By displaying the three-dimensional shape model, there is an effect that the detailed structure of the three-dimensional shape model can be grasped.

  According to the invention according to claim 7, by calculating a display magnification at which a plurality of display reference coordinates are displayed, a plurality of portions to which the user pays attention are displayed. There is an effect that it becomes easy to recognize the shape of the model.

  According to the invention of claim 8, by setting the display magnification at which the vertex of the polyhedral data of the three-dimensional shape model is displayed, the entire three-dimensional shape model is included in the display range, and the user can There is an effect that it becomes easy to recognize the shape of the three-dimensional shape model.

  According to the invention of claim 9, by setting the display magnification at which the apex of the shape obtained by simplifying the 3D shape model is displayed, the entire 3D shape model is included in the display range, The person can easily recognize the shape of the three-dimensional shape model.

  According to the invention of claim 10, even when the mode of the three-dimensional shape model is changed every predetermined time, the three-dimensional shape model is reduced by reducing the display reference coordinates to the display magnification including the display range. By displaying on the display device, the user can easily grasp the shape of the three-dimensional shape model.

  According to the invention of claim 11, the mode of the 3D shape model accepted by the user by the interactive means by changing the mode of the 3D shape model by the interactive means with the user. Even in the case of being displayed, since the 3D shape model is displayed with the display magnification including the display reference coordinates in the display range, the user can easily grasp the shape of the 3D shape model. Play.

  According to the twelfth aspect of the present invention, the display magnification at which the display reference coordinates are displayed is calculated, and the three-dimensional shape model is displayed by reducing the display magnification to the calculated display magnification. It is displayed on the display device, so that the user can easily recognize the shape of the three-dimensional shape model. Further, by calculating the display magnification based on the projection reference coordinates obtained by projecting the display reference coordinates onto the two-dimensional area and the display range of the two-dimensional area, the calculated display magnification includes a portion that is noticed by the user. Since the display magnification is necessary and sufficient, an effect is obtained that an optimal display magnification is set for the user to grasp the three-dimensional shape model.

  According to the invention of claim 13, even if the aspect of the three-dimensional shape model displayed on the display device is changed by changing the viewpoint coordinates or the gaze point coordinates, the display reference Since the coordinates are included in the display range, the user can easily recognize the shape of the three-dimensional shape model.

  According to the fourteenth aspect of the present invention, even if the three-dimensional shape model displayed on the display device is changed by translating or rotating the three-dimensional shape model, the display reference is changed. Since the coordinates are included in the display range, the user can easily recognize the shape of the three-dimensional shape model.

  According to the invention of claim 15, the reference distance indicating the shortest distance from the projection reference coordinates to the center line of the display range, the display distance from the boundary line of the display range on the two-dimensional region to the display center line, By calculating the display magnification based on the ratio of, the calculated display magnification is the necessary and sufficient display magnification including the part that the user pays attention to, so it is optimal for the user to grasp the 3D shape model. The effect is that a large display magnification is set.

  Further, according to the invention of claim 16, by displaying the display range before the display is reduced and displayed at the calculated display magnification, the user can visually recognize the display range before setting the display magnification, There is an effect that the change rate of the display magnification can be grasped.

  According to the seventeenth aspect of the present invention, the display reference coordinates are enlarged at the previous display magnification included in the display range by switching the inverse of the display magnification stored in the display magnification storage means as the return display magnification. By displaying the three-dimensional shape model, there is an effect that the detailed structure of the three-dimensional shape model can be grasped.

  According to the invention of claim 18, by calculating the display magnification at which a plurality of display reference coordinates are displayed, a plurality of portions to which the user pays attention are displayed. There is an effect that it becomes easy to recognize the shape of the model.

  According to the nineteenth aspect of the present invention, by setting the display magnification at which the vertex of the polyhedral data of the three-dimensional shape model is displayed and displaying the three-dimensional shape model, the entire three-dimensional shape model falls within the display range. As a result, the user can easily recognize the shape of the three-dimensional shape model.

  According to the twentieth aspect of the invention, the entire three-dimensional shape model is displayed by setting the display magnification at which the vertex of the shape obtained by simplifying the three-dimensional shape model is displayed and displaying the three-dimensional shape model. Thus, the user can easily recognize the shape of the three-dimensional shape model.

  According to the invention of claim 21, even when the mode of the three-dimensional shape model is changed every predetermined time, the three-dimensional shape model is reduced by reducing the display reference coordinates to the display magnification including the display range. By displaying on the display device, the user can easily grasp the shape of the three-dimensional shape model.

  According to the invention of claim 22, the mode of the three-dimensional shape model accepted by the user by the interactive means by changing the mode of the three-dimensional shape model by the interactive means with the user. Even in the case of being displayed, since the 3D shape model is displayed with the display magnification including the display reference coordinates in the display range, the user can easily grasp the shape of the 3D shape model. Play.

  According to the invention of claim 23, the three-dimensional shape display method described in any one of claims 12 to 22 can be realized by using a computer by causing the computer to read and execute the method. It is possible to achieve the same effects as those three-dimensional shape display methods.

  Exemplary embodiments of a three-dimensional shape display device, a three-dimensional shape display method, and a program for causing the computer to execute the method will be described below in detail with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is a block diagram showing a configuration of a three-dimensional shape display device 100 according to the first embodiment of the present invention. As shown in the figure, the interior of the three-dimensional shape display apparatus 100 includes a storage unit 101, an input processing unit 102, an aspect changing unit 103, a display magnification calculating unit 104, a range determining unit 105, and a display processing unit 106. And a display magnification switching unit 107, and when the mode of the three-dimensional shape model is changed by the user, the display magnification is changed to include the coordinates of the portion on which the user is paying attention on the three-dimensional shape model. Then, a three-dimensional shape model is displayed. In addition, the coordinate which shows the position of the part which the user is paying attention is a coordinate used as the reference | standard displayed after a change, and is equivalent to the display reference | standard coordinate of this invention.

  The storage unit 101 corresponds to the display magnification storage unit of the present invention, and stores the display magnification and data of the three-dimensional shape model. The 3D shape model stored in the storage unit 101 is used for displaying on the 3D shape display device 100. In this embodiment, the display magnification stored in the storage unit 101 in advance is “1”, but the stored display magnification is not limited to “1”.

  The input processing unit 102 processes input performed by an interactive method with the user. As an example of the input by the interactive method performed by the input processing unit 102, the mode of the three-dimensional shape model is changed, the display magnification for displaying the three-dimensional shape model is changed, and the like. As another example, a display reduction dialog or a display return dialog for changing the display magnification is displayed on the display 150 or displayed. Based on the mode of the 3D shape model input by the user through interactive means, the display magnification for displaying the coordinates of the part of interest is set and the 3D shape model is displayed by the processing described later. As a result, the user can easily grasp the shape of the three-dimensional shape model based on the portion of interest.

  An example of the interactive method by the input processing unit 102 is that when the user moves the three-dimensional shape model, the user selects whether to move, translate, or translate at the same time as the rotation, and the user performs the rotation. If selected, the user is further prompted to input the frequency of rotation in the x-axis, y-axis, and z-axis directions.

  The display processing unit 106 displays the three-dimensional shape model input from the storage unit 101 on the display 150 at a display magnification stored in the storage unit 101. Further, every time a mode such as a three-dimensional shape model is changed by a mode changing unit 103 described later, the display processing unit 106 displays the display magnification stored in the three-dimensional shape model storage unit 101. As a result, when the display magnification is calculated by the display magnification calculation unit 104 described later, the display processing unit 106 displays the three-dimensional shape model by reducing the calculated display magnification.

  Further, every time the display magnification is switched by the display magnification switching unit 107, the display processing unit 106 displays the three-dimensional shape model enlarged or reduced by the display magnification switched by the display magnification switching unit 107. By displaying the three-dimensional shape model at the display magnification switched by the display magnification switching unit 107, it is possible to display the three-dimensional shape model by enlarging or reducing the display magnification as desired by the user.

  Further, the display processing unit 106 displays a rectangular frame indicating a display range before being reduced and displayed with the display magnification calculated by the display magnification calculation unit 104 described later. The frame indicating the display range before being reduced at the display magnification is calculated by multiplying the distance from the center to the end of the display range after the change by the display magnification. The frame indicating the display range before reduction corresponds to the display range before reduction according to the present invention.

FIG. 2 is a diagram schematically illustrating an aspect in which an object that is a three-dimensional shape model is displayed on the display 150. E is a viewpoint, S is a gazing point indicating a center point ahead of the viewpoint, P is a projection plane, and a range indicated by the rectangle is a display range displayed on the display 150. Then, the object G projected from the viewpoint E onto the display range P is displayed on the display 150. T is a coordinate at which a straight line connecting the viewpoint E to the gazing point S intersects the surface of the object G. In the present embodiment, this coordinate T is handled as a portion that the user pays attention to. This is because when the object G is displayed on the display 150, the coordinate T is a portion that is displayed in the center of the three-dimensional shape model at the beginning. The projected gazing point S ′ and the coordinates T ′ in which the gazing point S and the coordinates T are displayed on the display range P are initially displayed on the display range P so as to overlap each other. The example object coordinates T ₁ the coordinates T ₁ is being projected when G a is rotated coordinates T is moved to the coordinate T ₁ 'for is not included in the display range P, displays the display range P range P' In order to zoom in, the display magnification needs to be changed. A plane including the display range P corresponds to the two-dimensional region of the present invention.

  In the present embodiment, the coordinate T is calculated by calculating the intersection of the curved surface of the three-dimensional shape model and a straight line. When the surface coordinates can be expressed as an expression, such as when the three-dimensional shape model is a sphere, it can be calculated by an algebraic method using an expression indicating a viewpoint straight line connecting the viewpoint and the gazing point.

  As another method for calculating the coordinates T, for example, there is a method for calculating an interference point by applying a geometric Newton-Raphson method. First, a rough check is performed between the curved surface of the three-dimensional shape model and the viewpoint straight line, and if there is no possibility of interference, the process ends. Next, the curved surface of the three-dimensional shape model is approximated by several triangles. Then, an interference point between the viewpoint straight line and the infinite plane including each triangle approximating the curved surface is obtained. If the parameter value at this point does not protrude significantly from the parameter space of the curved surface, this point is set as an approximate point of the interference point. Further, the approximate point is refined to obtain an accurate interference point. The exact interference point thus obtained is handled as the coordinate T.

  Note that as a form other than the present embodiment, the coordinates T indicating the portion of interest of the user may be obtained by a method other than calculating from the intersection of the viewpoint straight line connecting the viewpoint and the gazing point and the surface of the three-dimensional shape model. good. For example, it is conceivable to store the coordinates of a characteristic part that the user is likely to pay attention to as the coordinate T together with the three-dimensional shape model in advance.

  Returning to FIG. 1, the mode changing unit 103 is configured to display a 3D shape model, a viewpoint, or a gaze point that is displayed by the user via the input processing unit 102 on a plane including a display range displayed on the display 150. By calculating the position where the three-dimensional shape model is projected, the mode of the displayed three-dimensional shape model is changed. In addition, the mode changing unit 103 calculates the position of the coordinate T ′ that is projected on the plane including the display range in which the coordinate T indicating the portion that the user pays attention to.

  Note that the mode change unit 103 can change the mode of the three-dimensional shape model, for example, a change in the position of the viewpoint or the gazing point, a parallel movement or a rotational movement of the three-dimensional shape model, or a combination of these.

When the aspect change unit 103 changes the aspect of the three-dimensional shape model, the range determination unit 105 determines whether or not the display range includes a portion on the three-dimensional shape model that is noticed by the user. In the example of FIG. 2 described above, the user is the destination in which the coordinates T ₁ is whether the range determination unit coordinates T ₁ 'which is projected is included in the display range P of coordinates T of a portion of interest 105 determines. When the coordinate T ₁ ′ is included in the display range P by the range determination unit 105, it is not necessary to calculate the display magnification, so the load for calculating the display magnification is reduced.

Display magnification calculator 104, 'if it is determined that it is not included in the display range of the coordinate T _1' range judging unit 105 coordinates T ₁ is displayed, the coordinates T ₁ 'in other words expanded display range The display magnification including it is calculated. Then, the display magnification calculation unit 104 updates the display magnification stored in the storage unit 101 with the calculated display magnification. A method for calculating the display magnification will be described below.

FIG. 3 is a schematic cross-sectional view in which the object shown in FIG. Q ₁ and Q ₂ are the right end and the left end of the display range P, and the range of the object G visible from the viewpoint E is between V ₁ and V ₂ . d indicates the distance from the center point of the display range P (a point on the center line passing through the center of the display range P described later) to the boundary line that is the boundary of the display range, and D is the coordinate from the center point. The distance to T ₁ 'is shown. If the display range P becomes D / d times, the coordinate T ₁ ′ is included, so the display magnification is the reciprocal, that is, d / D. Note that when the display magnification is d / D, when displaying the three-dimensional shape model, the coordinate T ₁ ′ comes to the end of the display range, and therefore it is necessary to provide a certain margin to grasp the periphery of the coordinate T ₁ ′. The margin can be set as a display range that adds a predetermined reduction ratio to the display magnification or adds a predetermined distance from the end of the calculated display range as the actual display range. Is determined by actual measurement.

  FIG. 4 is an explanatory diagram regarding a correspondence relationship between a position at which a user pays attention to a position projected on a plane including a display range and a display magnification calculation method. In the present embodiment, the method for calculating the display magnification differs depending on the position where the portion of interest of the user is present from the display range P.

In FIG. 4, when the coordinate T ₂ ′ on which the portion of interest to the user is projected exists in the area A, that is, in the right and left areas of the display range P displayed on the display 150, the display range P is displayed. The shortest straight line distance d ₁ from the center line O _y passing through the center of the display range P to the left end or right end of the display range P in parallel with the left and right boundary lines that are the boundaries of the possible range, and the straight line distance d ₁ The display magnification is d ₁ / D ₁ obtained from a straight line distance D ₁ which is a straight line parallel to the straight line indicated by and which is the shortest from the center line O _y to the coordinate T ₂ ′. The center line O _y corresponds to the display center line of the present invention. The linear distance d ₁ corresponds to the display range distance of the present invention, and the linear distance D ₁ corresponds to the reference distance of the present invention.

Further, when the coordinate T ₃ ′ on which the portion of interest of the user is projected exists in the region B, that is, in the region above and below the display range P displayed on the display 150, the display range P can be displayed. linear distance d ₂ which is the shortest from the center line O _x to the upper end or the lower end of the display range P which is parallel with the range above and below the boundary line as a boundary passing through the center of the display range P, represented by the linear distance d ₂ The display magnification is d ₂ / D ₂ obtained from the straight line distance D ₂ which is a straight line parallel to the straight line and is the shortest from the center line O _x to the coordinate T ₃ ′. The center line O _x corresponds to the display center line of the present invention. The linear distance d ₂ corresponds to the display range distance of the present invention, and the linear distance D ₂ corresponds to the reference distance of the present invention.

The coordinate T ₄ 'user is a part of interest is present in the region C, that is, when present in an oblique direction of a region of the display range P displayed on the display 150, the display range P from the center line O _y obtained a linear distance d ₃ having the shortest to the left end or the right end, the linear distance D ₃ having the shortest of a straight line and a straight line parallel represented by a linear distance d ₃ from the center line O _y to the coordinates T ₄ ' D ₃ / D ₃ or the straight line distance d _{4 that} is the shortest from the center line O _x to the upper end or the lower end of the display range P, and the straight line parallel to the straight line indicated by the straight line distance d ₄ and the center line O _The smaller one of d ₄ / D ₄ obtained from the shortest linear distance D ₄ from _x to the coordinate T ₄ ′, that is, the larger reduction ratio is selected as the display magnification. The linear distances d ₃ and d ₄ correspond to the display range distance of the present invention, and the linear distances D ₃ and D ₄ correspond to the reference distance of the present invention.

  The display magnification calculation method described above can be used for any movement such as rotational movement, parallel movement, or movement of a viewpoint or a gazing point of a three-dimensional shape model.

  Next, an example of a three-dimensional shape model displayed on the display 150 by the processes of the aspect changing unit 103, the range determining unit 105, and the display magnification calculating unit 104 described above will be shown. First, it is an example when the three-dimensional shape model is rotationally moved.

FIG. 5 is a screen view displayed on the display 150 before the three-dimensional shape model of the present embodiment is rotationally moved. Coordinate S _r in this state 'is gazing point S _{coordinates r} is projected on the display range, the coordinates T _r' are the coordinates of the coordinate T _r of a portion where the user attention is projected in the display range. As shown in the figure, the coordinates S _r ′ and the coordinates T _r ′ overlap.

FIG. 6 is a screen view displayed on the display 150 after the three-dimensional shape model is slightly rotated from the state shown in FIG. In this state, the coordinates S _r ′ and the coordinates T _r ′ are not overlapped, but the coordinates T _r ′ are displayed on the display 150 (that is, included in the display range P), so the display magnification is changed. Not.

FIG. 7 is a diagram showing an example of a screen displayed on the display 150 when the three-dimensional shape model is further rotated from the state shown in FIG. 6 and the display magnification is not changed. In this state, the coordinate _Tr ′ is not already displayed on the display 150 (that is, not included in the display range), so the display magnification needs to be changed. Note that the screen shown in FIG. 7 is shown for explanation, and in this embodiment, the screen shown in this figure is not displayed on the display 150 after the rotational movement.

FIG. 8 is a screen diagram in which the three-dimensional shape model is displayed on the display 150 by changing from the state shown in FIG. 7 to the display magnification calculated by the display magnification calculator 104. The three-dimensional shape model is displayed at the display magnification calculated by the display magnification calculator 104 described above. As shown in this figure, by setting the display magnification so as to include the coordinates T _r ′, the part that the user is interested in is displayed, so that the user can grasp the shape of the three-dimensional shape model Becomes easy. A rectangle _Pr represents the display range before the display magnification is changed. This makes it easy for the user to grasp how much the display magnification has been changed.

  Further, as shown in FIG. 8, a display return dialog 801 is displayed on the screen after changing the display magnification. It is possible to restore the display magnification in the display return dialog 801 or to close the dialog itself. That is, when the display return button is clicked, processing by the display magnification switching unit 107 described later is performed, and then the display processing unit 106 displays the three-dimensional shape model at the original display magnification. When the close button is clicked, the display processing unit 106 hides the display return dialog itself.

  In this embodiment, after the display magnification is changed, a display return dialog is automatically displayed on the display. However, for example, it is displayed only when an operation for displaying the dialog is performed by the user. Anyway.

  As described above, the example in which the display magnification is changed when the three-dimensional shape model is rotationally moved has been shown. As a result, after the three-dimensional shape model is rotated and moved, a portion that is noticed by the user is displayed on the display 150. Next, an example when the three-dimensional shape model is translated is shown.

FIG. 9 is a screen view displayed on the display 150 before the three-dimensional shape model is translated. Coordinate S _m in this state 'are coordinates of the gaze point S _m is projected in the display range, coordinate T _m' are the coordinates of the coordinate T _m of a portion where the user attention is projected in the display range. As shown in the figure, the coordinates S _m ′ and the coordinates T _m ′ overlap.

FIG. 10 is a screen diagram displayed on the display 150 when the three-dimensional shape model is translated from the state shown in FIG. 9 and the display magnification is not changed. In this state, since the coordinate T _m ′ is not already displayed on the display 150 (that is, not included in the display range P), it is necessary to change the display magnification. Note that the screen shown in FIG. 10 is shown for explanation, and in this embodiment, the screen shown in this drawing is not displayed on the display 150 after the parallel movement.

FIG. 11 is a screen diagram in which the three-dimensional shape model is displayed on the display 150 by changing from the state shown in FIG. 10 to the display magnification calculated by the display magnification calculator 104. The three-dimensional shape model is displayed at the display magnification calculated by the display magnification calculator 104 described above. As shown in the figure, since the coordinates T _m ′ indicating the portion that the user is paying attention to are displayed, it is easy for the user to grasp the shape of the three-dimensional shape model. A rectangle P _m indicates the display range before the display magnification is changed. This makes it easy for the user to grasp how much the display magnification has been changed. Similar to FIG. 8, the display return dialog 1101 is also displayed on the screen shown in FIG.

  Further, even when the viewpoint or the gazing point is moved, the portion that the user is paying attention is displayed by performing the above-described processing. For example, when the viewpoint is rotated and moved, the three-dimensional shape model is displayed in the same manner as when the three-dimensional shape model is rotated. Therefore, the procedure similar to that shown in FIGS. If the process is performed, it is possible to display a portion that the user pays attention to. In other words, changing the position of the viewpoint or gazing point changes the distance between the three-dimensional shape model and the viewpoint and the displayed angle, which is a combination of parallel movement and rotational movement of the three-dimensional shape model. Since this is the same, the display magnification can be calculated by a combination of the above-described processes, and the description thereof will be omitted.

  Returning to FIG. 1, the display magnification switching unit 107 displays the three-dimensional shape model after being reduced by the display magnification calculated by the display magnification calculation unit 104 and then receives an operation received from the user by the input processing unit 102. Thus, the reciprocal of the display magnification stored in the storage unit 101 is switched as a new display magnification. As a result, the display processing unit 106 can display an enlarged display magnification in the display range before the reduced display. In addition, after the display magnification is switched to the display magnification by the above-described processing, the display magnification switching unit 107 sets the reciprocal of the display magnification switched by the above-described processing by the operation received from the user as a new display magnification. Switch as As a result, the display processing unit 106 can reduce and display the display magnification so as to include the portion that the user is paying attention to again.

  When the display magnification is switched using the example shown in FIG. 8, when the user selects and clicks the display restoration button in the display restoration dialog 801, the display magnification switching unit 107 is stored in the storage unit 101. The reciprocal of the display magnification is set as the display magnification to be displayed next, and the display processing unit 106 performs display processing. The display magnification to be displayed next corresponds to the return display magnification of the present invention.

  FIG. 12 is a screen view displayed on the display 150 after the user clicks the display return button from the screen shown in FIG. After the user clicks the display return button, an indication to switch to the original display magnification is input to the display magnification switching unit 107 via the input processing unit 102. Then, the display magnification switching unit 107 sets the reciprocal of the display magnification stored in the storage unit 101 as the display magnification, and the display processing unit 106 displays the 3D shape model at the set display magnification. As a result, the user can display the three-dimensional shape model at the original display magnification, and can grasp the actual size or detailed structure of the three-dimensional shape model.

  As shown in FIG. 12, when the display processing unit 106 displays the three-dimensional shape model at the original display magnification, a display reduction dialog 1201 is displayed. When the user clicks the display reduction button of the display reduction dialog 1201, the display magnification switching unit 107 sets the display magnification stored in the storage unit 101, and the display processing unit 106 sets the three-dimensional shape at the set display magnification. Display the model. By this processing, the three-dimensional shape model is displayed so as to include a portion that is noticed by the user.

  By providing the display magnification switching unit 107, the user can switch the display magnification, so that the display range including the original display range and the portion that the user is interested in can be switched, and the operability of the three-dimensional shape display device is improved. improves.

  Next, processing from the input process of the operation of the 3D shape model by the user to the display of the 3D shape model in the 3D shape display apparatus 100 according to the present embodiment configured as described above will be described. FIG. 13 is a flowchart showing the above-described processing procedure in the three-dimensional shape display apparatus 100 according to the present embodiment.

  The input processing unit 102 performs a process of inputting that the user has performed a rotational movement or the like of the three-dimensional shape model, and outputs the result to the mode changing unit 103 (step S1301). Next, the aspect changing unit 103 calculates an aspect projected on a plane including the display range of the three-dimensional shape model that has been rotationally moved or the like, based on the input from the input processing unit 102 (step S1302). Then, the aspect changing unit 103 calculates the position of the coordinate T ′ projected on the plane including the display range, where the coordinate T indicating the portion that the user pays attention to (step S1303).

  Then, the range determination unit 105 determines whether or not the position of the coordinate T ′ calculated by the mode changing unit 103 is included in the display range displayed on the display (step S1304).

  When it is determined by the range determination unit 105 that it is included in the display range (step S1304: Yes), the display processing unit 106 sets the display magnification in the mode of the 3D shape model calculated by the mode change unit 103. It displays without changing (step S1305). At the time of display, the display magnification stored in the storage unit 101 is used as it is as the display magnification.

  When it is determined by the range determination unit 105 that it is not included in the display range (step S1304: No), the display magnification calculation unit 104 calculates a display magnification that allows the coordinate T ′ to be included in the display range. (Step S1306). Then, the display magnification calculation unit 104 updates the display magnification stored in the storage unit 101 with the calculated display magnification (step S1307).

  Then, the display processing unit 106 displays the aspect of the 3D shape model calculated by the aspect changing unit 103 by reducing the display magnification stored in the storage unit 101 (step S1308). Further, the display processing unit 106 displays a frame indicating the display range before the table magnification change and a display return dialog (step S1309).

  When there is a change in the mode of the 3D shape model with rotational movement by the above-described processing procedure, it is possible to display the 3D shape model by changing the display magnification. Further, the operation processed by the input processing unit is not limited to rotational movement, and the above-described processing can be performed in the case of parallel movement of a three-dimensional shape model, movement of a viewpoint or a point of sight. Note that the processing procedure described above is an example of a procedure from the change of the aspect of the three-dimensional shape model to the display with the display magnification changed, and is not limited to the processing procedure described above.

  Next, processing related to the dialog from the display of the three-dimensional shape model to the closing of the dialog for switching the display magnification in the three-dimensional shape display apparatus 100 according to the present embodiment configured as described above will be described. FIG. 14 is a flowchart showing the above-described processing procedure in the three-dimensional shape display apparatus 100 according to the present embodiment. First, it is assumed that the three-dimensional shape model is displayed on the display 150 in a state where the display magnification is changed to include the position coordinates of the portion of interest of the three-dimensional shape model.

  The display processing unit 106 displays a display return dialog (step S1401). In the display return dialog, as shown in FIG. 8, a display return button and a close button are displayed.

  Next, the input processing unit 102 performs a process of inputting which one of the display return button and the close button in the display return dialog is clicked (step S1402).

  When the input processing unit 102 performs an input process that the display return button has been clicked (step S1402: display return), the display magnification switching unit 107 newly sets the reciprocal of the display magnification stored in the storage unit 101 as a new display magnification. (Step S1403).

  The display processing unit 106 enlarges the display magnification switched by the display magnification switching unit 107 and displays a three-dimensional shape model (step S1404). Then, the display processing unit 106 updates the dialog to a display reduction dialog (step S1405).

  Then, the input processing unit 102 performs a process of inputting which one of the display reduction button and the close button in the display reduction dialog is clicked (step S1406).

  When the input processing unit 102 performs input processing to the effect that the display reduction button has been clicked (step S1406: display reduction), the display magnification switching unit 107 newly sets the display magnification stored in the storage unit 101 as the display magnification. Switching (step S1407).

  Then, the display processing unit 106 reduces the display magnification switched by the display magnification switching unit 107 and displays a three-dimensional shape model (step S1408). Then, the display processing unit 106 updates the dialog to a display return dialog (step S1409). Then, the input processing unit 102 starts again from the process of inputting which of the display return button and the close button of the display return dialog is clicked (step S1402).

  When the input processing unit 102 performs input processing of clicking the close button (step S1402: close, step S1406: close), the input processing unit 102 hides the dialog regardless of the display reduction dialog or the display return dialog and ends (step S1410). ).

  The processing procedure described above is an example of a procedure for switching the display magnification by the displayed dialog, and is not limited to the processing procedure described above.

  FIG. 15 is a diagram illustrating a hardware configuration of a PC that executes a program for realizing the functions of the three-dimensional shape display apparatus 100. The three-dimensional shape display device 100 according to the present embodiment includes a control device such as a CPU (Central Processing Unit) 1501, a storage device such as a memory 1504, an external storage device such as an HDD 1504 (Hard Disk Drive), a display 1505, and the like. The display device and an input device 1503 such as a keyboard and a mouse are provided, and a hardware configuration using a normal computer is employed.

  The three-dimensional shape display program executed by the three-dimensional shape display device 100 of the present embodiment is a file in an installable format or an executable format, and is a CD-ROM, flexible disk (FD), CD-R, DVD (Digital). It is recorded on a computer readable recording medium such as Versatile Disk).

  The 3D shape display program executed by the 3D shape display apparatus 100 of the present embodiment is stored on a computer connected to a network such as the Internet and is provided by being downloaded via the network. May be. Further, the 3D shape display program executed by the 3D shape display device 100 of the present embodiment may be provided or distributed via a network such as the Internet.

  Further, the three-dimensional shape display program of the present embodiment may be configured to be provided by being incorporated in advance in a ROM or the like.

  The three-dimensional shape display program executed by the three-dimensional shape display apparatus 100 according to the present embodiment includes the above-described units (input processing unit, mode changing unit, range determining unit, display magnification calculating unit, display processing unit, display magnification switching). In the actual hardware, the CPU 1501 reads out and executes the three-dimensional shape display program from the storage medium, so that each unit is loaded on the main storage device, and the input processing unit, A mode change unit, a range determination unit, a display magnification calculation unit, a display processing unit, and a display magnification switching unit are generated on the main storage device.

  Further, the present embodiment is not limited to a method of calculating the display magnification based on the ratio between the distance from the center line to the end of the display range and the position coordinates indicating the portion of interest from the center line. A method of calculating based on the ratio of the distance from the projected position to the end of the display range and the distance from the position where the gazing point is projected to the position indicating the part of interest may be used.

  The three-dimensional shape model displayed on the three-dimensional shape display device 100 is not limited to the three-dimensional shape model stored in the storage unit 101. For example, a three-dimensional shape model acquired from another device via a network is used. You may display.

  The three-dimensional shape display apparatus 100 allows the user to recognize the shape of the three-dimensional shape model by displaying the coordinates indicating the portion of interest within the display range.

  In addition, since the display magnification is calculated based on the position where the predetermined coordinates are projected and the display range, which is the part of interest, the display magnification that just includes the part of interest is calculated, and the display magnification is reduced. The display magnification that is necessary and sufficient to include the part of interest that is not too large is set, so the optimal display magnification is set for the user to grasp the three-dimensional shape model. It becomes. In addition, by setting an optimal display magnification, it is possible to grasp details of the three-dimensional shape model while recognizing the shape of the three-dimensional shape model.

  Further, since the display magnification is calculated based on only predetermined coordinates, the calculation amount for calculating the display magnification for displaying the three-dimensional shape model is reduced, and the burden on the three-dimensional shape display device 100 is reduced or the display speed is improved. It becomes possible to make it.

(Second Embodiment)
In the first embodiment, the display magnification is set depending on whether or not the coordinates indicating the part of interest are included. By applying the processing procedure for setting the display magnification to include this coordinate to the coordinates of each vertex of the polyhedral data of the 3D shape model, the 3D shape model is displayed within the display range. Is possible. In the present embodiment, the display magnification is set such that the coordinates of each vertex of the polyhedral data of the three-dimensional shape model are included in the display range.

  FIG. 16: is a block diagram which shows the structure of the three-dimensional shape display apparatus 1600 concerning the 2nd Embodiment of this invention. The aspect changing unit 1601, the display magnification calculating unit 104, and the range determining unit 105, which are different from the three-dimensional shape display device 100 according to the first embodiment described above, are processed. The difference is that the range determination unit 1603 has a changed configuration. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Similar to the aspect changing unit 103 of the first embodiment, the aspect changing unit 1601 is a three-dimensional shape model, viewpoint, or three-dimensional shape after movement of the point of gaze performed by the user via the input processing unit 102. By calculating the mode when the model is projected onto a plane including the display range of the display 150, the mode of the three-dimensional shape model is changed. Also, the mode changing unit 1601 calculates the coordinates of each projection vertex obtained by projecting each vertex of the polyhedral data of the three-dimensional shape model onto a plane including the display range. The other processing in the mode changing unit 1601 is the same as that of the mode changing unit 103 in the first embodiment.

  The range determination unit 1603 determines whether all the vertices of the polyhedral data of the 3D shape model are included in the display range of the display 150 when the mode change unit 1601 changes the mode of the 3D shape model. To do. As a method for calculating whether or not each vertex is included in the display range, the same calculation method as the range determination unit 105 of the first embodiment is used.

  When the range determination unit 1603 determines that all the vertices are included in the display range, the display processing unit 106 does not need to calculate the display magnification by the display magnification calculation unit 1602 described later. The three-dimensional shape model is displayed in the changed mode.

  When the range determination unit 1603 determines that there is a vertex that is not included in the display range, the display magnification calculation unit 1602 calculates the display magnification that is included in the display range for each vertex. Then, the display magnification calculation unit 1602 selects the display magnification with the smallest value among the calculated display magnifications, that is, the one with the largest reduction ratio, and stores it in the storage unit 101 with the selected display magnification. Update the displayed magnification. Note that the method of calculating the display magnification performed for each vertex is the same as that of the display magnification calculation unit 104 of the first embodiment.

  Next, an example of the aspect of the three-dimensional shape model that is changed by the processing of the aspect change unit 1601, the range determination unit 1603, and the display magnification calculation unit 1602 as a result of rotating the three-dimensional shape model will be described.

FIG. 17 is a screen view displayed on the display 150 before rotating the three-dimensional shape model. In the screen shown in the figure, all the vertices of the polyhedral data of the three-dimensional shape model are all included in the display range. Further, the coordinate S _r2 ′ indicates the coordinate at which the _gazing point S _r2 is projected on the display range. In this figure and FIGS. 18 and 19 to be described later, each vertex is indicated by a black circle. However, this is shown for ease of explanation, and the three-dimensional shape model is actually displayed on the display 150. There is no need to indicate each vertex of the polyhedron data by a black circle.

  FIG. 18 is a screen diagram displayed on the display 150 when the three-dimensional shape model is rotated from the state shown in FIG. 17 and the display magnification is not changed. In the state shown in this figure, since some vertices are not already displayed on the display 150 (that is, not included in the display range), it is necessary to change the display magnification by the display magnification calculator 1602. . Note that the screen shown in FIG. 18 is shown for explanation, and in this embodiment, the screen shown in this drawing is not displayed on the display 150 after the rotational movement.

FIG. 19 is a screen diagram in which the three-dimensional shape model is displayed on the display 150 by changing from the state shown in FIG. 18 to the display magnification calculated by the display magnification calculator 1602. As shown in the figure, since the entire three-dimensional shape model is displayed, it is easy for the user to grasp the shape of the three-dimensional shape model. A rectangle _{Pr 2} indicates the display range before the display magnification is changed. This makes it easy for the user to grasp how much the display magnification has been changed. As in the first embodiment, the display return dialog 1901 is also displayed on the screen shown in FIG.

  The processing procedure performed by the three-dimensional shape display apparatus 1600 according to the present embodiment configured as described above is 3 from the point that the display magnification is calculated based on the position coordinates of the part that the user pays attention to. Since the processing procedure is the same as that shown in the first embodiment except that the display magnification is changed based on each vertex of the polyhedron data of the three-dimensional shape model, the description is omitted.

  The present embodiment is not limited to calculating the display magnification based on each vertex of the polyhedron data on the three-dimensional shape model. For example, an arbitrary reference for displaying from the entire surface of the three-dimensional shape model It is conceivable that the display magnification that can be displayed for each coordinate is calculated, the smallest value of the calculated display magnification is set as the actual display magnification.

  It should be noted that the present invention is not limited to changing the display magnification in the case of the rotational movement of the three-dimensional shape model, and the same applies to the parallel movement of the three-dimensional shape model and the movement of the viewpoint or the gazing point. The display magnification can be changed by using processing.

  In this embodiment, since the display magnification is changed so that each vertex of polyhedral data of the 3D shape model is included in the display range, the entire 3D shape model is displayed, and the user can It becomes easy to recognize the entire shape of the model. In addition, since the display magnification calculated in the present embodiment is a display magnification that is necessary and sufficient to display the entire three-dimensional shape model, an optimal display magnification is set for the user to grasp the three-dimensional shape model. The Rukoto.

(Third embodiment)
In the second embodiment, the display magnification is set so that the coordinates of each vertex of the polyhedral data of the three-dimensional shape model are included in the display range. However, if the polyhedron data is included in every vertex and the display magnification is calculated, a huge load may be applied to the processing. Therefore, in this embodiment, a bounding box is used for the three-dimensional shape model, and the display magnification is set so that the coordinates of each vertex of the bounding box are included in the display range. The bounding box refers to the shape of only the smallest box circumscribing the three-dimensional shape model, and corresponds to a simplified shape of the three-dimensional shape model of the present invention.

  FIG. 20 is a block diagram showing a configuration of a three-dimensional shape display apparatus 2000 according to the third embodiment of the present invention. The three-dimensional shape display device 1600 according to the second embodiment described above is different from the aspect changing unit 1601, the display magnification calculating unit 1602, and the range determining unit 1603. The aspect changing unit 2001, the display magnification calculating unit 2002, The difference is that the range determination unit 2003 has a changed configuration. In the following description, the same components as those in the second embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  Similar to the aspect changing unit 1601 of the second embodiment, the aspect changing unit 2001 is a three-dimensional shape model, viewpoint, or three-dimensional shape after movement of the point of gaze performed by the user via the input processing unit 102. By calculating the mode when the model is projected onto a plane including the display range of the display 150, the mode of the three-dimensional shape model is changed. In addition, the aspect changing unit 2001 calculates the position of each projection vertex obtained by projecting each vertex of the bounding box for the three-dimensional shape model onto a plane including the display range. The other processing in the mode changing unit 1601 is the same as that of the mode changing unit 103 in the first embodiment.

  When the aspect of the three-dimensional shape model is changed by the aspect changing unit 2001 described above, the range determination unit 2003 determines whether all the vertices of the bounding box for the three-dimensional shape model are included in the display range of the display 150. judge. As a method for calculating whether or not each vertex is included in the display range, the same calculation method as the range determination unit 105 of the first embodiment is used.

  If the range determination unit 2003 determines that all the vertices are included in the display range, the display processing unit 106 does not need to calculate the display magnification by the display magnification calculation unit 2002 described later. The three-dimensional shape model is displayed in the changed mode. When the range determination unit 1603 determines that even one of the vertices is not included in the display range, the display magnification calculation unit 1602 described later calculates the display magnification.

  When the range determination unit 2003 determines that there is a vertex that is not included in the display range, the display magnification calculation unit 2002 calculates the display magnification that is included in the display range for each vertex that is not included in the display range. . The display magnification calculation unit 2002 selects the display magnification with the smallest value, that is, the one with the largest reduction ratio, and stores it in the storage unit 101 based on the selected display magnification. Update the displayed magnification. Note that the method of calculating the display magnification is the same as that of the display magnification calculation unit 104 of the first embodiment.

  Next, an example of the aspect of the three-dimensional shape model that is changed by the processing of the aspect changing unit 2001, the range determining unit 2003, and the display magnification calculating unit 2002 as a result of rotating the three-dimensional shape model will be described.

FIG. 21 is a screen view displayed on the display 150 before rotating the three-dimensional shape model. In the screen shown in this figure, each vertex of the bounding box of the three-dimensional shape model is included in the display range. Further, the coordinate S _r3 ′ indicates the coordinate at which the _gazing point S _r3 is projected on the display range. In FIG. 22 and FIG. 23, which will be described later, each vertex of the bounding box is indicated by a black circle. However, this is shown for ease of explanation, and this is shown in FIG. It is not necessary to indicate each vertex of the bounding box of the 3D shape model with a black circle. Further, it is not necessary to display the bounding box of the three-dimensional shape model, and it is sufficient to use it as an internal process of the three-dimensional shape display device 2000.

  FIG. 22 is a screen diagram displayed on the display 150 when the three-dimensional shape model is rotated from the state shown in FIG. 21 and the display magnification is not changed. In the state shown in this figure, since some vertices of the bounding box of the three-dimensional shape model are already outside the display range on the display 150, it is necessary to change the display magnification by the display magnification calculator 2002. Note that the screen shown in FIG. 22 is shown for explanation, and in this embodiment, the screen shown in this drawing is not displayed on the display 150 after the rotational movement.

FIG. 23 is a screen diagram in which the three-dimensional shape model is displayed on the display 150 by changing from the state shown in FIG. 22 to the display magnification calculated by the display magnification calculator 2002. As shown in the figure, since the entire three-dimensional shape model is displayed, it is easy for the user to grasp the shape of the three-dimensional shape model. A rectangle _Pr3 indicates the display range before changing the display magnification. This makes it easy for the user to grasp how much the display magnification has been changed. As in the first embodiment, the display return dialog 2301 is also displayed on the screen shown in FIG.

  Further, the processing procedure performed by the 3D shape display apparatus 2000 according to the present embodiment configured as described above is based on the point that the display magnification is calculated based on each vertex of the polyhedral data of the 3D shape model. Except for the point that is changed to calculate the display magnification based on each vertex of the bounding box of the shape model, the processing procedure is the same as that shown in the second embodiment, and the description is omitted.

  It should be noted that the present invention is not limited to changing the display magnification in the case of the rotational movement of the three-dimensional shape model, and the same applies to the parallel movement of the three-dimensional shape model and the movement of the viewpoint or the gazing point. The display magnification can be changed by using processing.

  In the present embodiment, since the three-dimensional shape model is included in the display range, the user can easily recognize the entire shape of the three-dimensional shape model. In addition, since the display magnification calculated in the present embodiment is a display magnification that is necessary and sufficient to display the entire three-dimensional shape model, an optimal display magnification is set for the user to grasp the three-dimensional shape model. The Rukoto.

  Further, in the present embodiment, since calculation is performed based on each vertex of the bounding box, the number of vertices to be calculated is reduced, so that a load for calculating whether the display magnification is included or not is included. Will be reduced.

(Modification)
In addition, this invention is not limited to embodiment mentioned above, The deformation | transformation which is illustrated below is possible.

In the above-described embodiment, when the mode of the three-dimensional shape model is changed, the interactive method is used. However, the embodiment is not limited thereto. For example, the three-dimensional shape model itself may be scrolled or rotated by an operation of a pointing device or the like, and the mode may be updated and displayed every predetermined time like a moving image. In this case, the three-dimensional shape model user whether determined by projecting coordinates T _t of coordinates T _t of a portion of interest 'is included in the first display range P _t for each to be drawn, it is not included Is determined, the display magnification is calculated, and the three-dimensional shape model is drawn on the display 150 after being reduced to the calculated display magnification.

  As a result, even when the 3D shape model is scrolled or rotated like a moving image, the portion displayed by the user is always included in the display range, and the user can easily grasp the shape of the 3D shape model. Is possible.

  In addition, whether or not the portion of interest is included in the display range, every time drawing is performed so that the vertex of the other surface data of the 3D shape model or the vertex of the bounding box of the 3D shape model is included in the display range, The display magnification may be calculated.

  As described above, the three-dimensional shape display device, the three-dimensional shape display method, and the program for causing the computer to execute the method according to the present invention are useful for setting the display magnification when displaying the three-dimensional shape model. Particularly, it is suitable for setting a display magnification including a portion that is noticed by a user in a three-dimensional shape model.

It is a block diagram which shows the structure of the three-dimensional shape display apparatus concerning 1st Embodiment. It is the figure which showed typically the aspect by which the target object which is a three-dimensional shape model is displayed on a display. It is the schematic cross section which projected the target object which is a three-dimensional shape model on the display range on a display. It is explanatory drawing regarding the correspondence of the position which the position which the user is paying attention projected on the plane containing a display range, and the display magnification calculation method. It is the screen figure displayed on the display before rotating the three-dimensional shape model in the three-dimensional shape display apparatus concerning 1st Embodiment. It is the screen figure displayed on the display, after rotating a 3D shape model small from the initial state of the 3D shape display apparatus concerning 1st Embodiment. The figure which showed the example of a screen displayed on a display, when a three-dimensional shape model is largely rotated from the initial state of the three-dimensional shape display apparatus concerning 1st Embodiment, and the display magnification is not changed. is there. The three-dimensional shape model is greatly rotated from the initial state of the three-dimensional shape display device according to the first embodiment, changed to the display magnification calculated by the display magnification calculator, and the three-dimensional shape model is displayed on the display. FIG. It is the screen figure displayed on the display before translating a three-dimensional shape model in the three-dimensional shape display device concerning a 1st embodiment. It is the figure which showed the example of a screen displayed on a display, when a three-dimensional shape model is translated from an initial state and the display magnification is not changed in the three-dimensional shape display apparatus concerning 1st Embodiment. . In the three-dimensional shape display apparatus according to the first embodiment, the three-dimensional shape model is translated from the initial state, changed to the display magnification calculated by the display magnification calculation unit, and the three-dimensional shape model is displayed on the display. FIG. The screen figure displayed on the display after a user clicks the display return button from the screen displayed after rotating the three-dimensional shape model from the initial state in the three-dimensional shape display device according to the first embodiment. It is. It is a flowchart which shows the procedure of the process from the input process of operation of the 3D shape model by the user in the 3D shape display apparatus concerning 1st Embodiment to the display of a 3D shape model. It is a flowchart which shows the procedure of the process after the ternary shape model in the three-dimensional shape display apparatus concerning 1st Embodiment is displayed until the dialog which switches a display magnification is closed. It is the figure which showed the hardware constitutions of PC which performed the program for implement | achieving the function of the three-dimensional shape display apparatus concerning 1st Embodiment. It is a block diagram which shows the structure of the three-dimensional shape display apparatus concerning 2nd Embodiment. It is the screen figure displayed on the display before rotating the three-dimensional shape model in the three-dimensional shape display apparatus concerning 2nd Embodiment. The figure which showed the example of the screen displayed on a display, when a 3D shape model is rotated from the initial state in the 3D shape display apparatus concerning 2nd Embodiment, and the display magnification was not changed. is there. In the three-dimensional shape display device according to the second embodiment, the three-dimensional shape model is rotated from the initial state, changed to the display magnification calculated by the display magnification calculator, and displayed on the display. FIG. It is a block diagram which shows the structure of the three-dimensional shape display apparatus concerning 3rd Embodiment. It is the screen figure displayed on the display before rotating the three-dimensional shape model in the three-dimensional shape display apparatus concerning 3rd Embodiment. The figure which showed the example of the screen displayed on a display, when a 3D shape model is rotated from the initial state in the 3D shape display apparatus concerning 3rd Embodiment, and display magnification is not changed. is there. In the three-dimensional shape display device according to the third embodiment, the three-dimensional shape model is rotated from the initial state, changed to the display magnification calculated by the display magnification calculator, and displayed on the display. FIG.

Explanation of symbols

100, 1600, 2000 Three-dimensional shape display device 101 Storage unit 102 Input processing unit 103, 1601, 2001 Aspect change unit 104, 1602, 2002 Display magnification calculation unit 105, 1603, 2003 Range determination unit 106 Display processing unit 107 Display magnification switching Unit 150 Display 801 Display restoration dialog 1101, 1901, 2301 Display restoration dialog 1201 Display reduction dialog 1501 CPU
1502 HDD
1503 Input device 1504 Memory 1505 Display 1506 Bus

Claims (23)

Mode changing means for changing the mode of the three-dimensional shape model displayed on the display device;
When the aspect of the three-dimensional shape model is changed by the aspect changing means, a reference to be displayed after the change on the three-dimensional shape model in the two-dimensional area where the three-dimensional shape model is projected and displayed on the display device The projection reference coordinates are displayed on the basis of the projection reference coordinates projected on the two-dimensional region and the display range displayed on the display device in the two-dimensional region. Display magnification calculating means for calculating the display magnification;
Display processing means for reducing the display magnification calculated by the display magnification changing means and displaying the three-dimensional shape model on the display device;
A three-dimensional shape display device comprising:   The three-dimensional shape display apparatus according to claim 1, wherein the aspect changing unit changes the aspect by rotating or translating the three-dimensional shape model.   The aspect changing unit changes the aspect of the three-dimensional shape model displayed on the display device by changing a viewpoint coordinate indicating a position of a viewpoint or a gazing point coordinate indicating a position of a gazing point. The three-dimensional shape display apparatus according to claim 1 or 2.   The display magnification calculation means includes a boundary of a displayable range of the display range from the projection reference coordinates on which the predetermined display reference coordinates serving as a reference to be displayed after the change on the three-dimensional shape model are projected. A reference distance indicating the shortest distance to the display center line parallel to the boundary line and passing through the center of the display range, and a display range from the boundary line to the display center line on a straight line parallel to the straight line indicating the reference distance The three-dimensional shape display device according to any one of claims 1 to 3, wherein a display magnification is calculated based on a ratio of the distance.   The display processing means further displays a display range before reduction indicating the display range before being reduced and displayed at the display magnification calculated by the display magnification calculation means. The three-dimensional shape display apparatus as described in any one. Display magnification storage means for storing the display magnification calculated by the display magnification calculation means;
Display magnification switching means for switching the inverse of the display magnification stored in the display magnification storage means as a return display magnification;
6. The display device according to claim 1, wherein the display processing unit displays the three-dimensional shape model by magnifying at the return display magnification switched by the display magnification switching unit. Dimensional shape display device. When the aspect of the three-dimensional shape model is changed by the aspect changing means, the display magnification calculation means has a plurality of predetermined display reference coordinates on the three-dimensional shape model in the two-dimensional area. Calculating a display magnification for displaying the plurality of projection coordinates based on the plurality of projection reference coordinates projected on the two-dimensional area and the display range displayed on the display device in the two-dimensional area; The three-dimensional shape display device according to any one of claims 1 to 6. When the aspect of the three-dimensional shape model is changed by the aspect changing means, the display magnification calculation means has the vertex coordinates indicating each vertex of the polyhedron data serving as the three-dimensional shape model in the two-dimensional area. The display magnification for displaying the plurality of projection vertex coordinates is calculated based on the plurality of projection vertex coordinates projected on the two-dimensional region and the display range on the two-dimensional region. The three-dimensional shape display device described in 1. When the aspect of the three-dimensional shape model is changed by the aspect change means, the display magnification calculation means has vertex coordinates indicating each vertex of a shape obtained by simplifying the three-dimensional shape model in the two-dimensional region. The display magnification at which the plurality of projection vertex coordinates are displayed is calculated based on the plurality of projection vertex coordinates projected on the two-dimensional region and the display range on the two-dimensional region. The three-dimensional shape display device according to 7. The display form changing means changes the aspect of the three-dimensional shape model every predetermined time,
The display magnification calculating means is a predetermined reference that is displayed on the three-dimensional shape model after the change in the two-dimensional area every time the aspect of the three-dimensional shape model is changed by the aspect changing means. Based on the projection reference coordinates projected on the two-dimensional region and the display range on the two-dimensional region, the display magnification at which the projection coordinates are displayed is calculated,
The display processing means reduces the display magnification calculated by the display magnification changing means every predetermined time and displays the three-dimensional shape model on the display device. The three-dimensional shape display apparatus as described in any one of 1-9.   The three-dimensional shape display device according to any one of claims 1 to 10, wherein the display form changing means changes the aspect of the three-dimensional shape model by interactive means with a user. . An aspect changing step for changing an aspect of the three-dimensional shape model displayed on the display device;
When the aspect of the three-dimensional shape model is changed by the aspect changing step, a reference to be displayed after the change on the three-dimensional shape model in the two-dimensional area where the three-dimensional shape model is projected and displayed on the display device The projection reference coordinates are displayed on the basis of the projection reference coordinates projected on the two-dimensional region and the display range displayed on the display device in the two-dimensional region. A display magnification calculation step for calculating a display magnification;
A display processing step of reducing the display magnification calculated in the display magnification changing step and displaying the three-dimensional shape model on the display device;
A three-dimensional shape display method comprising:   The three-dimensional shape display method according to claim 12, wherein the aspect changing step changes the aspect by rotating or translating the three-dimensional shape model.   In the aspect changing step, the aspect coordinates indicating the position of the viewpoint or the gazing point coordinates indicating the position of the gazing point are changed to change the aspect of the three-dimensional shape model displayed on the display device. The three-dimensional shape display method according to claim 11 or 12.   In the display magnification calculation step, a boundary of a displayable range of the display range is calculated from the projection reference coordinates obtained by projecting the predetermined display reference coordinates serving as a reference to be displayed after the change on the three-dimensional shape model. A reference distance indicating the shortest distance to the display center line parallel to the boundary line and passing through the center of the display range, and a display range from the boundary line to the display center line on a straight line parallel to the straight line indicating the reference distance The three-dimensional shape display method according to any one of claims 12 to 14, wherein a display magnification is calculated based on a ratio of the distance.   The display processing step further displays a pre-reduction display range indicating the display range before being reduced and displayed at the display magnification calculated in the display magnification calculation step. The three-dimensional shape display method according to any one of the above. A display magnification switching step of switching the inverse of the display magnification calculated in the display magnification calculation step as a return display magnification;
17. The display according to claim 12, wherein the display processing step displays the three-dimensional shape model enlarged at the return display magnification switched by the display magnification switching step. Dimensional shape display method. In the display magnification calculation step, when the aspect of the three-dimensional shape model is changed by the aspect change step, a plurality of predetermined display reference coordinates on the three-dimensional shape model are determined in the two-dimensional region. Calculating a display magnification for displaying the plurality of projection coordinates based on the plurality of projection reference coordinates projected on the two-dimensional area and the display range displayed on the display device in the two-dimensional area; The three-dimensional shape display method according to any one of claims 12 to 17. In the display magnification calculation step, when the aspect of the three-dimensional shape model is changed by the aspect change step, the vertex coordinates indicating each vertex of the polyhedron data to be the three-dimensional shape model in the two-dimensional region are the 2 The display magnification for displaying the plurality of projection vertex coordinates is calculated based on the plurality of projection vertex coordinates projected on the two-dimensional region and the display range on the two-dimensional region. The three-dimensional shape display method described in 1. In the display magnification calculation step, when the aspect of the three-dimensional shape model is changed by the aspect changing step, the vertex coordinates indicating each vertex of the shape obtained by simplifying the three-dimensional shape model in the two-dimensional region are The display magnification at which the plurality of projection vertex coordinates are displayed is calculated based on the plurality of projection vertex coordinates projected on the two-dimensional region and the display range on the two-dimensional region. The three-dimensional shape display method according to 18. In the display form changing step, the aspect of the three-dimensional shape model is changed every predetermined time,
The display magnification calculation step is predetermined as a reference to be displayed on the three-dimensional shape model after the change in the two-dimensional region every time the aspect of the three-dimensional shape model is changed by the aspect changing step. Based on the projection reference coordinates projected on the two-dimensional region and the display range on the two-dimensional region, the display magnification at which the projection coordinates are displayed is calculated,
The display processing step displays the three-dimensional shape model on the display device by reducing at the display magnification calculated by the display magnification changing step every predetermined time. The three-dimensional shape display method according to any one of 12 to 20.   The three-dimensional shape display method according to any one of claims 12 to 21, wherein the display form changing step changes a mode of the three-dimensional shape model by an interactive step with a user. .   A program for causing a computer to execute the method according to any one of claims 12 to 22.

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