JP3524143B2 - Graphic processing method and apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic processing method and apparatus for creating a corresponding three-dimensional graphic from a plurality of planar graphics.

[0002]

2. Description of the Related Art In a conventional figure processing system such as CAD, a three-dimensional figure based on a plurality of plane figures represented by a drawing or the like is used.
When creating a three-dimensional figure, after defining the shape of each figure element (line, plane, etc.) and defining the shape of all elements,
The process of modeling a three-dimensional surface was performed.

[0003]

However, the conventional method is
The figure represented by a drawing or the like was not directly displayed as a three-dimensional model. That is, conventionally, it has been necessary to individually display each drawing and independently display the drawing, and to define or set the shape for each element while observing the display on the screen. After defining all the elements of each figure in this way, a process of creating a three-dimensional model is performed. For this reason, it takes a lot of time and effort to create a three-dimensional figure, and since a lot of detailed work is required, it causes a figure display error due to an operation error or the like.

The present invention has been made in view of the above conventional example, and a graphic processing method and a graphic processing method capable of easily defining the surface shape of each element of a graphic and creating a three-dimensional graphic based on the defined graphic elements. The purpose is to provide a device.

Another object of the present invention is to provide a graphic processing method and apparatus which can easily confirm and change the definition contents of the surface shape of these graphic elements.

Another object of the present invention is to provide a graphic processing method and apparatus capable of creating a three-dimensional graphic based on a plurality of graphics and graphic elements while checking the graphics on the screen.

Another object of the present invention is to provide a graphic processing method and apparatus capable of changing the shape of a predetermined surface in accordance with the corresponding surface shape of another graphic to create an accurate three-dimensional graphic. Especially.

Still another object of the present invention is to provide a graphic processing method and apparatus capable of creating a three-dimensional graphic by a simple operation even for a graphic including an opening.

[0009]

In order to achieve the above object, the graphic processing method of the present invention comprises the following steps.
That is, a graphic processing method in a graphic processing device, which has at least a display device, a storage device, and an input device, and creates a three-dimensional graphic based on a plurality of planar graphics displayed on the display screen of the display device. A step of displaying on the display screen a plurality of plane figures, which are stored in the apparatus and viewed one three-dimensional figure from different directions, and the operator inputs the input apparatus from the plane figures displayed on the display screen. Is used to indicate the closed region to be processed, the operator defines the surface shape of the closed region using the input device, and the operator uses the input device to display. Instructing the shape of a surface corresponding to the closed region in another plane figure,
If the width of the closed area and the length of the shape of the surface of the corresponding closed area are compared and do not match, the length of the shape of the surface corresponding to the closed area is corrected to match the width of the closed area. And a step of performing each of the steps on each surface of the plurality of plane figures, creating a three-dimensional figure from the plurality of plane figures, and displaying the three-dimensional figure on the display screen. To do. In order to achieve the above object, the graphic processing method of the present invention includes the following steps. That is, a graphic processing method in a graphic processing device, which has at least a display device, a storage device, and an input device, and creates a three-dimensional graphic based on a plurality of planar graphics displayed on the display screen of the display device. A step of displaying on the display screen a plurality of plane figures, which are stored in the apparatus and viewed one three-dimensional figure from different directions, and the operator inputs the input apparatus from the plane figures displayed on the display screen. To indicate the closed region to be processed, an operator to define the surface shape of the closed region using the input device, and the closed region includes the closed region. A determination step of determining whether or not the closed region can be an opening depending on whether or not the outermost periphery of the planar figure is included, and a planar figure including the closed region is determined when the determination step determines that the closed area can be an opening. A step of determining a search direction indicating a direction of a plane figure in contact with the plane figure and determining a width of the closed area orthogonal to the search direction; and a step included in the plane figure positioned in the search direction based on the width of the closed area. Determining whether the element corresponding to the closed region is an opening selection element, and determining that the closed region is an opening when it is determined to be the opening selection element, A step of creating a three-dimensional figure from the plurality of planar figures based on the closed area determined to be an opening and the surface shape defined for the closed area, and displaying the three-dimensional figure on the display screen. It is characterized by having.

In order to achieve the above object, the graphic processing apparatus of the present invention has the following configuration. That is, the display control means for displaying a plurality of plane figures in which one three-dimensional figure is viewed from different directions on the display screen, and the closed area to be processed from the plane figure displayed on the display screen are handled by the operator.
Of the surface area of the closed region instructed using the instructing means and the instructing means by the operator.
And surface defining means for defining the operation, in other plane figure that is displayed on the display screen, the shape of the surface corresponding to the closed area, and the surface shape definition means for defining the operation of the operator , If the width of the closed region and the length of the shape of the surface of the corresponding closed region are not matched and the lengths of the shapes of the faces corresponding to the closed regions match the width of the closed region, When a correction means for correcting and a shape of a closed area and a surface corresponding to the closed area are set for each surface of the plurality of plane figures, a three-dimensional figure is created from the plurality of plane figures and the display is performed. And a creating means for displaying on the screen. In order to achieve the above object, the graphic processing apparatus of the present invention has the following configuration. That is, a display control means for displaying a plurality of plane figures in which one three-dimensional figure is viewed from different directions on the display screen, and a closed area to be processed from the displayed plane figures displayed on the display screen . and instruction means for instructing the operation of an operator, the surface shape of the closed region is indicated by using the instructing unit, and the surface shape definition means for defining the operation of the operator, the closed area is the closed First determining means for determining whether or not the closed area can be an opening depending on whether the outermost periphery of the plane figure including the area is included, and it is determined that the closed area can be an opening by the determination by the first determining means. And a width determining means for determining a search direction indicating a direction of a plane figure adjacent to a plane figure including the closed area, and determining a width of the closed area orthogonal to the search direction, and the width determined by the width determining means. Second determining means for determining whether or not the element corresponding to the closed area included in the plane figure positioned in the search direction is the opening selection element based on the width of the area; and the second determining means. When it is determined that the element is an opening selection element, the determination unit that determines the closed area to be an opening, the closed area determined to be the opening, and the closed area are defined. And a creating means for creating a three-dimensional figure from the plurality of plane figures based on the surface shape and displaying the three-dimensional figure on the display screen.

[0011]

In the above structure, a plurality of plane figures in which one three-dimensional figure is viewed from different directions are displayed, the operator designates a closed region to be processed from the displayed plane figures, and the operator displays the plane. Define the shape, instruct the operator to specify the shape of the surface corresponding to the closed area in other displayed planar figures, and compare the width of the closed area with the length of the shape of the surface of the corresponding closed area. And the length of the shape of the surface corresponding to the closed area is
Modify it to match the width of the closed area. By performing such a process for each surface of the plurality of plane figures, a three-dimensional figure is created from the plurality of plane figures and displayed on the display screen. Further, according to the configuration of the present invention, a plurality of plane figures obtained by viewing one three-dimensional figure from different directions are displayed on the display screen, and the operation is performed from the displayed plane figures.
Instructs closed region to be processed by the regulator, the operator
Get more define the surface shape of the closed region, it is determined whether the closed region by whether including outermost plane figures the closed area including the closed region can become the opening becomes the opening Then, the search direction indicating the direction of the plane figure adjacent to the plane figure including the closed area is determined, the width of the closed area orthogonal to the search direction is determined, and the position in the search direction is determined based on the width. It is determined whether or not the element corresponding to the closed area included in the planar figure is an opening selection element. If it is determined that the element is an opening selection element, the closed area is an opening. Then, a three-dimensional figure is created from a plurality of plane figures based on the closed area determined to be the opening and the surface shape defined for the closed area.
Operates as it is displayed on the display screen.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram showing the schematic arrangement of a graphic processing system according to an embodiment of the present invention.

An input device 11 is provided with a pointing device such as a keyboard and a mouse, and displays a menu, an instruction of an element displayed on the screen of the display device 14, an instruction of a position on the screen, and other Has an input function. A storage device 12 has a semiconductor memory, a magnetic disk, or the like, and is a drawing to be processed, a closed area as a premise of this embodiment, a defined surface shape, and a graphic processing system of this embodiment is a closed area. And a three-dimensional surface (surface) model generated from the surface shape and other various information. Reference numeral 13 denotes a central processing unit, which is loaded with control programs for executing various controls of the graphic processing system of this embodiment, and reads, processes, writes, and other various data stored in the storage device 12. Is running. A display device 14 displays various figures, closed areas, surface shapes, menus, various messages, a three-dimensional surface (surface) model generated from the closed areas and surface shapes by the figure processing system of this embodiment, and the like.

[First Embodiment] FIG. 1 is a flow chart showing a surface shape defining method in a graphic processing system according to a first embodiment of the present invention. A control program for executing this processing is stored in a storage device 12, It is loaded into the central processing unit 13 and executed.

In the present embodiment, first, step S1
Then, the graphic information (drawing image) stored in the storage device 12 is read. Next, in step S2, the figure is closed while checking the relationship between the graphic elements such as line segments and arcs in the drawing, that is, whether they are adjacent or connected, and the result is stored in the storage device 12. To store. The closed region referred to here is, for example, a region formed by a closed loop as shown in FIG. 3, and always has one outer peripheral loop and zero or more inner peripheral loops. Next, the process proceeds to step S3, and the closed region that has been closed is displayed on the display device 14. By the processing up to this point, the closed region necessary for defining the surface shape is prepared.

Next, in step S4, a processing method for the closed graphic region is selected. That is, in this process, the display device 14
In the state where the drawing which is closed area is displayed,
Several selection items of the processing method are displayed on the menu, and information of selection / instruction of the menu item is given by the input device 11 linked with the display device 14 to select the processing method.
The selection items of this processing method include definition of the surface shape, cancellation of the definition of the surface shape, confirmation of the surface shape, and display of a three-dimensional surface (surface) model. By selecting this processing method, one processing method is selected from these selection items.

FIG. 4 is a diagram showing an example of a menu screen displaying the selection items of this processing method. As the selection items, the menu 65 has (DIRECT, CANCEL, INFO).
(RM, SURF) and the like are displayed, and any of these selection items is designated using the input device 11. 4, 40 is a front view, 41 is a top view, and 42 is a right side view. Here, "DIRECT" indicates the definition of the surface shape, and defines the surface shape of the closed region.

"CANCEL" cancels the definition of the surface shape, and is used to cancel the surface shape of the defined closed region.

"INFORM" means confirmation of the surface shape, and is used for displaying and confirming the surface shape of the defined closed region.

"SURF" indicates the creation of a three-dimensional surface (surface) model, creates a three-dimensional surface (surface) model according to the surface shape of the defined closed region and the definition method, and the result Means to display.

When the processing method is selected in this way, in step S5, the processing to be executed next is distributed according to the selected processing method. That is, the surface shape definition (DIRE
When (CT) is selected, the process proceeds to step S6, and the process of defining the surface shape of the closed region is executed. If it is selected to cancel the definition of the surface shape (CANCEL), the flow advances to step S7 to cancel the surface shape of the defined closed region. Confirmation of surface shape (INFOM)
If is selected, the flow advances to step S8 to display the surface shape of the defined closed region. Further, when the three-dimensional surface model display (SURF) is selected, the process proceeds to step S9, where the surface shape of the defined closed region and the defining method are used.
A three-dimensional surface model of the closed area is created. When any one of these steps S6 to S9 is completed, the process proceeds to step S10, and the processing result is displayed on the display device 14.

FIG. 5 is a flow chart showing the processing when the definition of the surface shape is selected in step S4 of FIG. 1. The processing shown in this flow chart is from step S4 of FIG.
This corresponds to the processing flow of S6 and S10.

Step S corresponding to step S4 in FIG.
When the definition of the surface shape (DIRECT) is selected in step 21, the process proceeds to step S22 and waits until the target closed region is designated. In this, the operator uses the input device 11 to instruct an arbitrary closed region, which is a target for defining a surface shape, of the closed region displayed on the display device 14.

The method of this instruction is, for example, as shown in FIG. 6, a message 6 displayed on the screen of the display device 14.
In accordance with 0, the position of any one point included in the closed region is designated by the input device 11 which is interlocked with the display of the display device 14. For example, in the example of FIG. 6, one point 61 in the closed region 62 of the top view 41 is designated. When this one point is designated, the internal / external relationship between each closed region displayed on the screen and the designated point 61 is determined, and the closed region 62 of the top view 41 including the designated point 61 inside is Recognize that it is the instructed closed area.

Next, in step S23, the definition of the surface shape is instructed. This instruction is performed by instructing the surface shape definition instruction menu displayed on the display device 14 with the input device 11. That is, as a method of defining the surface shape, a plane definition (PALN) is used depending on what surface is expressed when the closed region is expressed in three dimensions.
E), cross-section definition (SECTION), rotation plane definition (RO
T) and others.

FIG. 7 is a diagram for explaining this surface shape selection processing, and 69 shows a surface shape selection menu. In this figure, the plane (PLANE) of the menu 69 is selected to indicate that the closed region 62 in the top view 41 indicated is a plane.

Next, in step S24, the definition element of the surface shape is designated, and the element defining the surface shape of the designated closed region is designated. This process will be described with reference to FIG. First, when a method of defining the surface shape of the closed region 62 is instructed, a message 67 is displayed on the display device 14 according to the instructed method of defining the surface shape, and an instruction of an element that defines the surface shape is prompted. Therefore, for example, the plane shape of the plan view or the cross section of the top view 41 in which the closed region 62 is indicated as shown in the figure is represented by a mathematical formula determined by the corresponding element (shown by 66) of the front view 40, for example. You can Follow the instructions of the message 67 displayed there,
The corresponding element of the front view 40 displayed on the display device 14 is designated by the input device 11 which is linked with the display device 14.

Similarly, as shown in FIG. 9, the menu 6
When the closed area 72 which is the rotation surface in the top view 41 is instructed by pointing to the point 71 in the state in which the rotation surface (ROT) of 9 is specified, the surface shape of the closed area 72 is the closed shape. It can be represented by a mathematical formula defined by the center of rotation 75 of the region 72 and the corresponding rotating element 73 of the front view 40. Therefore, the input device 11 gives an instruction according to the instruction of the message 76 prompting the element instruction. In addition, the display device 1
By changing the display brightness of the designated element 73 among the elements displayed in 4, it is possible to confirm whether or not the desired element is correctly designated.

Next, in step S25, it is determined whether or not the closed region and its surface shape match. In this process, the width of the instructed closed region and the length of the surface shape are obtained from the relationship between the drawings, and it is determined whether or not the respective lengths match. For example, when the closed area 82 of the top view 41 and the element 83 of the side view 42 are designated as the surface shapes as shown in FIG.
As shown in FIG. 5, from the relationship between the top view 41 and the right side view 42, the width of the closed region 82 becomes the length (W1) in the Y-axis direction of the top view 41, and the length of the surface-shaped element 83. Is the length (L1) in the X-axis direction of the right side view 42. When these two calculated lengths do not match, it is determined that the surface shape of the closed region 82 does not match, and when they match, the closed region 82 and the surface-shaped element 83 match. that if it is determine <br/> constant.

If it is determined that the surface shape of the closed area does not match, the process proceeds to step S26, and the length of the surface shape is corrected so as to be the same as the width of the closed area. For example, in FIG.
As shown in FIG. 11A, when the specified closed region width (W1) does not match the surface shape length (L1), as shown in FIG. The element 83 ', in which the end point P2 of the element 83 is extended to P3, has a surface shape so that the length matches the width (W1) of the closed region (L1 = W1).

In this way, the process proceeds to step S27, and the closed region which is the object of the surface shape, the definition of the surface shape, and the elements defining the surface shape are determined by the processing up to this point. Therefore, we derive a mathematical formula expressing the surface shape from these,
The storage device 12 is defined as the surface shape of the target closed region.
To store. Then, in step S28, the result of defining the surface shape is displayed. Here, in the display device 14,
It is possible to confirm whether or not the surface shape is correctly defined by changing the brightness of the closed region in which the target closed region is designated by the definition of the closed region.

FIG. 12 shows steps S4, S5 and S of FIG.
7 is a flowchart showing a process of canceling the definition of the surface shape in S7.

Step S corresponding to step S 4 in FIG.
In step 31, when an instruction to cancel the definition of the surface shape is input from the input device 11, the process proceeds to step S32, and the surface shape is already defined in the closed region drawing displayed on the display device 14. In Closed area, specify any closed area whose definition you want to cancel. A specific method of this instruction will be described with reference to FIG.

As shown in FIG. 13A, in the state where the surface shape definition cancel (CANCEL) is instructed,
According to the instruction of the message 84, the arbitrary point 61 included in the closed region 62 of the top view 41 is designated by the input device 11 which is interlocked with the display of the display device 14. When this one point 61 is designated, the positional relationship between each closed area displayed on the display screen and the designated point 61 on the screen is determined,
The closed region 62 including the designated point 61 inside is recognized as the designated closed region.

Next, in step S33, a correspondence is made based on the closed area information stored in the storage device 12 corresponding to the instructed closed area and the surface shape defined in the closed area. The area of the storage device 12 in which the definition information of the surface shape to be stored is found, and the information of the closed area is deleted from the storage device 12.

Next, in step S34, the result of the process of canceling the definition of the surface shape is displayed on the display device 14 as shown in FIG. 13 (B). In this FIG. 13 (B),
Closed area 6 of top view 41 instructed to cancel
It is possible to change the luminance of 2 and confirm whether or not the definition of the surface shape is canceled as intended by the operator.

FIG. 14 is a flowchart showing the processing for confirming the definition of the surface shape in the flowchart of FIG.

First, in step S41, step S in FIG.
Corresponding to 4, the confirmation of the definition of the surface shape is instructed. This is done by instructing (INFO) on the menu 65. Next, in step S42, in the closed area in which the surface shape is already defined, of the closed area figures displayed on the display device 14, an arbitrary closed area whose definition content is to be confirmed is designated. This instruction method is shown in FIG.
As shown in FIG. 5 (A), it is instructed by instructing the position of an arbitrary point 91 included in the closed region 92 by the input device 11 operating in conjunction with the display device 14 in accordance with the instruction of the message 93. When one point 91 is designated, the internal / external relationship between each of the displayed closed areas and the designated point 91 is determined, and the closed area 92 including the designated point 91 inside is recognized as the desired closed area. It

Next, in step S43, from the closed area information stored in the storage device 12 corresponding to the instructed closed area 92 and the surface shape information defined in the closed area, The definition information of the corresponding surface shape is read and referred to. Then, in step S44, the confirmed surface shape is displayed on the display device 14. This is for example shown in FIG.
As shown in FIG. 5 (B), in the display device 14, the brightness of the surface shape 93 in the right side view 42 corresponding to the instructed closed area 92 is changed, and which element defines the surface shape of the instructed closed area. It is possible to confirm whether or not the shape has been formed.

FIG. 16 is a flowchart showing the processing when the three-dimensional surface model generation processing (SURF) is selected.

Step S corresponding to step S4 in FIG.
When an instruction to create a three-dimensional surface model is issued at 51, the process proceeds to step S52, and all VIEWs existing in the drawing are processed.
The Z-axis method vector (front view, right side view, left side view, top view, bottom view, rear view, etc.) is read from the storage device 12, and the sum of the direction vectors is set as the viewing direction of the three-dimensional screen. For example, as shown in FIG.
Front view 40, right side view 42, top view 4 with right cosine
In the case where 1 is a drawing, the sum vector (Z4 = Z1) of the Z-axis direction vectors (Z1, Z2, Z3) of each VIEW.
+ Z2 + Z3) is calculated. Vector coordinate system of the Soviet Union 17
It is shown in (B). Then, as shown in FIG. 18, a three-dimensional screen in which the obtained vector is in the line-of-sight direction (Z4) is automatically set. Next, in step S54,
As shown in FIG. 19, the three-dimensional screen model defined in the storage device 12 is displayed on the set three-dimensional screen of the display device 14.

[Second Embodiment] Next, the process of the second embodiment of the present invention showing the process of creating a three-dimensional model when an opening is provided on a figure will be described in detail. The hardware configuration of the graphic processing system according to the second embodiment is as follows.
Since the configuration of the apparatus of the first embodiment is almost the same,
The description is omitted.

FIG. 20 is a flow chart showing the processing in the graphic processing apparatus of the second embodiment. The control program for executing this processing is stored in the storage device 12 and executed by the central processing unit 13.

In step S61, the drawing information is read from the storage device 12 as in step S1 of FIG. Next, the process proceeds to step S62, and in the same manner as step S2 of FIG. 1, the figure is closed and stored in the storage device 12 while checking the adjacency relation of the graphic elements such as line segments and arcs in the drawing and the connection state. To do.

Next, in step S63, the closed area that has been closed is displayed on the display device 14. By the processing so far,
The closed area required for defining the surface shape is prepared.
Hereinafter, before entering the detailed description, terms used in the following description will be defined.

From now on, a view (projection view) in which a closed region which is a target for defining the surface shape exists is a view of interest, and a view for searching for the existence of an element defining the surface shape of the target closed region is a search view. The branch direction of the search view is the search direction. Further, a direction orthogonal to this search direction is a search orthogonal direction.

In step S63, it is searched whether or not there is a closed region whose surface shape is undetermined. That is, the storage device 12
All the closed areas stored in are searched to see if the surface shape of the closed area is fixed (S65),
Extract an undetermined closed area that is the target of automatic definition of the surface shape. The following processing also indicates processing in the storage device 12 unless otherwise specified.

When a closed region whose surface shape is not determined is found in this way, the flow advances to step S66 to execute the automatic opening definition step. This is intended to define an opening for a closed region in which the surface shape extracted in the steps so far is undetermined. A detailed flowchart of this automatic opening definition step is shown in FIG. 22 (A) and 22 (B) show examples of automatically defined drawings.

First, in step S81, it is checked whether the target closed region can be realized as an opening. This checking method can be realized by, for example, determining whether or not the element (edge) in the target closed area has the outermost loop (see FIG. 3). This is because the closed region or loop having the outermost periphery cannot be the opening. Next, in step S82, the direction in which to search for the opening definition element that defines the opening is determined. The direction of this search is, for example, the line-of-sight direction of each view adjacent to the view of interest in which the target closed region exists (see FIG. 22A). The search is performed in the direction of each view, and the following processing is performed while changing the search direction until the openings are determined in steps S85 and S86 or until the search of all adjacent views is completed in step S82.

Next, in step S83, the position where the width of the target closed area in the direction orthogonal to the opening defining element search is maximized is calculated. This calculation method is obtained, for example, by projecting each element forming the closed region in the search direction and taking the maximum and minimum values thereof. Next, proceeding to step S84, an opening defining element that matches one end of the maximum width position of the target closed area is searched. In this method, for example, all the elements in the search view are examined, and the opening and defining elements whose start and end points coincide with one end of the maximum width position of the target closed region, for example, are represented by the broken line in FIG. This is done by selecting a line segment or the like.

Next, in step S85, it is checked whether or not the opening selection elements searched in the above step are present at both ends of the maximum width position of the target closed area. Then, in step S84, when the opening selection element exists at both ends of the maximum width position of the target closed area, the target closed area is determined as the opening (step S86). If it is not decided as the opening by the processing so far, step S
Proceeding to 87, the automatic definition of the opening is undetermined.

When it is determined that the opening is included, the flow advances to step S68 in FIG. 20 to execute the process of automatically defining the cross section. A detailed flow chart of this automatic section definition step is shown in FIG. Also in FIG.
(A) and (B) have shown the drawing example of the automatic definition of a cross section.

First, in step S91, the direction in which the cross-section defining element of the target closed area is searched is determined. This search direction is, for example, the line-of-sight direction of each view adjacent to the view of interest. In the example of FIG. 24A, when the current surface shape automatic definition target closed region is 101 or 102, this search direction is the direction of the closed region 103 in the adjacent view of FIG. 24B. In this way, the search is performed in the direction of each view, and the following processing is performed while changing the search direction until the section is determined or until the search of all adjacent views is completed.

In step S92, the maximum width and the maximum width position in the search orthogonal direction of the target closed region in the search direction are calculated. This calculation method is performed in the same manner as the calculation of the maximum width position of the opening. Next, proceeding to step S93, a section defining element candidate matching both ends of the maximum width position of the target closed region is searched. This method is implemented, for example, by calculating the maximum width position of each element in the search orthogonal direction for all elements in the search view and comparing this with both ends of the maximum width position of the target closed region. It As a result of the comparison, an arc or a line segment whose both ends coincide with each other is regarded as a section definition element candidate. At this time, if the width of the focused element is smaller than the width of the target area and can be extended with the adjacent element, for example, if they are on the same straight line or on the same circular arc, the element is extended and the target Both ends of the maximum width position of the closed area are compared.

In the example of FIG. 24, when the current surface shape automatic definition target closed region is 101, the elements matching the both ends of the maximum width position of 101 in the search orthogonal direction are shown in FIG.
Only e09 of the adjacent view in (B). Further, when the target closed region is 102, the closed region 1 in the search orthogonal direction is
Elements corresponding to both ends of the maximum width position of 02 are shown in FIG.
Only e10 of the adjacent view in (B). When the target closed area is 103, the closed area 1 in the search orthogonal direction is
The elements corresponding to both ends of the maximum width position of 03 are two extended elements, (e04 + e07), and (e02 + e
05).

Next, in step S94, the section defining element candidate searched in the above step is selected and selected. The types of these cross-section definition element candidates include, for example, circles, arcs, slanted line segments, horizontal line segments, etc., but the criteria for selecting these are, for example, the element candidates themselves can be extended with adjacent elements. If not, discard the selection (non-extendable rule).

When a horizontal line segment and other elements are candidates at the same time, the horizontal line segment is discarded (horizontal inferiority rule).

When element candidates of the same type are simultaneously candidates, selections other than the element candidate closest to the target closed area are discarded (precedence priority rule).

And so on.

In the example of FIG. 24, when the current area-defined automatically defined proposed closed area is the closed area 103 of the adjacent view, two sets of cross-section definition element candidate elements (e04 + e0) are used.
7) and (e02 + e05), (e02 + e)
05) is abandoned by the above-mentioned prioritized rule. Next, proceeding to step S95, the cross-section defining element candidates selected in the above step are checked and the number of remaining candidates is checked. If the number of remaining candidates is one, it means that the cross-sectional shape is uniquely determined. In that case, the target closed region is determined as a cross-section that can be defined by the fixed cross-section defining element (step S96).

In the example of FIG. 24, the target closed area is 1
In the case of 01, since the cross section is uniquely determined by e09, it is determined. Further, when the target closed region is 102, the cross section is uniquely determined by e10, and thus it is determined. Further, when the target closed region is 103, the section is uniquely determined by (e04 + e07), and thus is determined. In this way, in the closed region which has not been determined in the steps so far, the search direction is newly changed in step S91, and the search for the cross-section defining element is continued until the surface shape is determined or all the search directions are searched. In this way, when the sectional shape is not finalized until the end, the automatic definition of the sectional shape is undetermined (step S97).

In this way, the process proceeds to step S69 of FIG. 20 again, and when the cross-sectional shape is confirmed, the process proceeds to step S70 to define the closed area to be the object of defining the surface shape and the surface shape by the processing up to this point. The element has been decided,
A mathematical expression or the like expressing the surface shape is derived from these, defined as the surface shape of the target closed region, and stored in the storage device 12. On the other hand, when the cross section cannot be determined, the process proceeds to step S71,
Since the closed area to be the surface shape definition target and the element defining the surface shape have not been determined by the processing up to this point, they are stored in the storage device 12 as undefined surfaces.

The surface shape defined by the above steps is displayed as the surface shape definition result in step S72. That is, the information defined by the above-mentioned processing is called from the storage device 12 and displayed separately for each type of surface shape. The way to distinguish this display is, for example,
This is achieved by changing the color for each opening, section, and undefined to fill the closed area.

FIGS. 25A and 25B show display examples of the results of defining the surface shape. In FIG. 25, a closed region 250 is defined as an opening, and its cross section is adjacent to the view (FIG. 25).
(B)) is indicated by a broken line.

By the processing up to this point, the closed area of the figure represented by the drawing, the automatic definition of the surface shape of each closed area, and the result are displayed. In this way, by the closed area and the surface shape stored in the storage device 12,
A three-dimensional figure is created and displayed.
The dimensional model data is stored and saved in the storage device 12.

FIG. 26 is a diagram showing a display example of a three-dimensional model created based on the data of FIG.

As described above, according to the second embodiment,
It is possible to directly create a three-dimensional model based on a figure represented by a drawing or the like, which has been impossible in the past.

According to this embodiment, the surface shape of a figure can be automatically defined to create a three-dimensional model.
The labor of inputting the three-dimensional figure can be significantly reduced, and the accuracy of the three-dimensional model can be improved.

[0070]

[Other Embodiments] In the surface shape definition of the above embodiment, the closed area and the graphic element displayed on the display device 14 are defined by the input device 1.
Although the method of defining the surface shape which is sequentially instructed using 1 has been described, as another embodiment, a pair of figures are formed inside the closed region in the drawing and on the element representing the surface shape in advance. Indicate attributes (eg symbols, characters, colors, etc.). Furthermore, by instructing the definition of the surface shape for each graphic attribute in advance, the surface shape can be defined by batch processing without performing interactive processing such as display or input instruction.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device. Further, it goes without saying that the present invention can also be applied to the case where it is achieved by supplying a program for implementing the present invention to a system or an apparatus.

As described above, according to this embodiment, it is possible to directly create and display a figure which is made into a three-dimensional model (surface) based on a figure expressed in a drawing or the like, which has been impossible in the past. As a result, it is possible to eliminate the trouble of inputting a shape or the like for creating a three-dimensional model graphic, and it is possible to significantly improve the accuracy of the created three-dimensional graphic.

[0073]

As described above, according to the present invention, the surface shape of each element of a figure can be easily defined, and a three-dimensional figure can be created based on the defined figure elements.

Further, according to the present invention, the definition contents of the surface shape of these graphic elements can be easily confirmed and changed.

Further, according to the present invention, while confirming a plurality of figures and figure elements on the screen, a three-dimensional figure based on these figures can be created by a simple operation.

Further, according to the present invention, the shape of a predetermined surface can be changed according to the corresponding surface shape of another graphic, and an accurate three-dimensional graphic can be created.

Further, according to the present invention, there is an effect that even a figure including an opening can be made into a three-dimensional figure from a plane figure by a simple operation.

[0078]

[Brief description of drawings]

FIG. 1 is a flowchart illustrating a graphic processing method for creating a three-dimensional model according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a graphic processing system of this embodiment.

FIG. 3 is a diagram illustrating a closed region in this embodiment.

FIG. 4 is a diagram showing a display example of a graphic and a menu in the first embodiment.

FIG. 5 is a flowchart showing a surface shape defining process in the first embodiment.

FIG. 6 is a diagram illustrating an example of designation of a target closed region according to the first embodiment.

FIG. 7 is a diagram showing a processing example for defining a surface shape in the first embodiment.

FIG. 8 is a diagram showing an instruction example (plane) of a surface shape element in the first embodiment.

FIG. 9 is a diagram showing an instruction example (rotational surface) of a surface shape element in the first embodiment.

FIG. 10 is a diagram illustrating an example of determining whether the closed region and the surface shape width match.

FIG. 11 is a diagram showing a modification example of the surface shape.

FIG. 12 is a flowchart showing processing for canceling the definition of the surface shape in the first embodiment.

FIG. 13 is a diagram showing an example of canceling the definition of the surface shape in the first embodiment.

FIG. 14 is a flowchart showing a surface shape confirmation process in the first embodiment.

FIG. 15 is a diagram showing an example of confirming the definition of the surface shape in the first embodiment.

FIG. 16 is a flowchart showing a process of creating a three-dimensional model in the first embodiment.

FIG. 17 is a diagram showing an example of VIEW direction cosine in the drawing in the first embodiment.

FIG. 18 is a diagram showing a setting example of a three-dimensional screen in the first embodiment.

FIG. 19 is a diagram showing a display example of a three-dimensional model in the present embodiment.

FIG. 20 is a flowchart showing a surface shape automatic definition process in the second embodiment of the present invention.

FIG. 21 is a flowchart illustrating automatic definition of an opening in the second embodiment.

FIG. 22 is a diagram for explaining automatic definition of an opening.

FIG. 23 is a flowchart showing a section automatic definition process.

FIG. 24 is a diagram for explaining automatic definition of a cross section.

FIG. 25 is a diagram showing a display example of a result of automatically defining a surface shape in the second embodiment.

FIG. 26 is a diagram showing an example of creating a three-dimensional model in the second embodiment.

[Explanation of symbols]

11 Input device 12 storage devices 13 Central processing unit 14 Display

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-4-296975 (JP, A) JP-A-4-360275 (JP, A) Yuichi Sato et al. Solid model generation processing based on CAD drawings, information processing Academic Research Report, Information Processing Society of Japan, May 24, 1991, vol. 91, no. 43 (CG-50), p. 43-50 (58) Fields surveyed (Int.Cl. ⁷ , DB name) G06F 17/50 JISST file (JOIS)

Claims (5)

(57) [Claims] 1. A graphic processing method in a graphic processing device, which has at least a display device, a storage device, and an input device, and creates a three-dimensional graphic based on a plurality of planar graphics displayed on a display screen of the display device. the storage device is stored, and displaying a plurality of plane figures viewed one three-dimensional shape from different directions on the display screen, from the plane figure displayed on the display screen, operator
A step of instructing the closed region to be processed by using the input device by data, a step of defining a surface shape of the closed region by using the input device by the operator, using the input device by the operator , Comparing the width of the closed area with the length of the shape of the surface of the corresponding closed area in the other planar figure being displayed, and the shape of the surface corresponding to the closed area is not matched. In this case, the step of correcting the length of the shape of the surface corresponding to the closed region so as to match the width of the closed region, and performing each of the steps for each surface of the plurality of planar figures, And a step of creating a three-dimensional figure from the plane figure and displaying it on the display screen. 2. The operator confirms the definition items of the surface shape defined for the closed area on the display screen.
Graphic processing method according to claim 1, further comprising a step of Ru is. 3. A graphic processing method in a graphic processing device, which has at least a display device, a storage device, and an input device, and creates a three-dimensional graphic based on a plurality of planar graphics displayed on a display screen of the display device. the storage device is stored, and displaying a plurality of plane figures viewed one three-dimensional shape from different directions on the display screen, from the plane figure displayed on the display screen, operator
And a step of instructing the closed region to be processed by using the input device by data, a step of defining a surface shape of the closed region by using the input device by an operator, the closed area is a the closed area A determination step of determining whether or not the closed region can be an opening depending on whether or not the outermost periphery of the planar figure is included; A step of determining a search direction indicating the directions of adjacent plane figures and obtaining a width of the closed region orthogonal to the search direction; and including a plane figure positioned in the search direction based on the width of the closed region. Determining whether the element corresponding to the closed region is an opening selection element, and determining that the closed region is an opening when it is determined to be the opening selection element. At the opening And a step of creating a three-dimensional figure from the plurality of plane figures on the basis of the surface shape defined for the closed area and displaying the three-dimensional figure on the display screen. Figure processing method characterized by. 4. A display control means for displaying a plurality of plane figures in which one three-dimensional figure is viewed from different directions on a display screen, and a closed area to be processed from the plane figure displayed on the display screen. An instructing means for instructing by an operator's operation, and a surface shape of the closed region instructed by using the instructing means ,
Surface definition means for defining by operator's operation, and the shape of the surface corresponding to the closed area in the other plane figure displayed on the display screen is manipulated by the operator.
If the shape of the surface corresponding to the closed area does not match by comparing the width of the closed area with the length of the shape of the surface of the corresponding closed area, the length of the shape of the surface corresponding to the closed area is defined. Correcting means for correcting so as to match the width of the closed area, and when the shape of the closed area and the surface corresponding to the closed area are set for each surface of the plurality of planar figures, the plurality of flat surfaces A graphic processing device, comprising: a creating means for creating a three-dimensional graphic from the graphic and displaying it on the display screen. 5. A display control means for displaying a plurality of plane figures in which one three-dimensional figure is viewed from different directions on a display screen, and closing a processing target from the displayed plane figures displayed on the display screen. Instructing means for instructing an area by an operator's operation , surface shape defining means for defining a surface shape of the closed area instructed by using the instructing means by an operator's operation, and the closed area A first judgment means for judging whether or not the closed area can be an opening depending on whether or not includes the outermost periphery of the plane figure including the closed area; and an opening can be formed by the judgment of the first judgment means. When it is determined, a search direction indicating the direction of a plane figure adjacent to the plane figure including the closed area is determined, and a width determination means for determining the width of the closed area orthogonal to the search direction is determined by the width determination means. Second determining means for determining, based on the width of the closed region, whether or not the element corresponding to the closed region included in the planar figure positioned in the search direction is an opening selection element; If it is determined by the second determination means that the element is an opening selection element, the determination means determines that the closed area is an opening, the closed area determined to be the opening, and the closed area. A graphic processing device comprising: a creating unit that creates a three-dimensional graphic from the plurality of planar graphics based on the surface shape defined for the screen and displays the three-dimensional graphic on the display screen.