JPH08221601A - Line-of-view editing device - Google Patents

Abstract

PURPOSE: To generate a perspective similar to actually viewing as to a line-of- view editing device which performs a viewing point and gazing point editing processing required to generate a perspective of a three-dimensional structure generated by a three-dimensional CAD system. CONSTITUTION: This device is equipped with a means 110 which sets a moving vector, a means 111 which moves a viewing point as mush as the moving vector, a means 112 which moves a gazing point as much as the moving vector, or with the means 110 which sets the moving vector, the means which moves the viewing point at much as the moving vector, the means which move the gazing point as much as the moving vector, a means which moves the gazing point after movement around the viewing point after movement as much as a specified angle of rotation in a specified rotational direction, and a means which updates the moving vector by moving it as much as the specified angle of rotation in the specified rotational direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line-of-sight editing apparatus for executing editing processing of a viewpoint and a gazing point necessary for creating a perspective view of a three-dimensional structure created by a three-dimensional CAD system, The present invention relates to a line-of-sight editing device that realizes creation of a perspective view that is close to what humans see.

In the three-dimensional CG system, a three-dimensional structure created by the three-dimensional CAD system is provided with a viewpoint corresponding to the position of the human eye and a gazing point corresponding to the position of the object seen by the human. A process of setting and creating a perspective view of a three-dimensional structure when viewing the gazing point from the viewpoint is executed. The line-of-sight editing device that constitutes the three-dimensional CG system executes the line-of-sight editing process by editing the coordinate positions of the viewpoint and the gazing point. It is necessary to build a configuration that enables the creation of near perspective views.

[0003]

2. Description of the Related Art As a modification of the line of sight in a three-dimensional CG system, there is a method of moving the viewpoint forward or backward in accordance with the walking of a person. In addition, there is one that rotates the line of sight in accordance with a case where a person walks along a building and turns a corner.

In the conventional line-of-sight editing apparatus, when advancing or retreating the viewpoint, the method of advancing or retracting the viewpoint in the direction from the viewpoint to the gazing point has been adopted.

Further, when walking along a building and turning a corner, the viewpoint is fixed at the building corner position, and the gazing point is rotated around the fixed viewpoint to rotate the line of sight. The method of letting it was adopted.

[0006]

When a human actually walks, he or she moves forward with his or her line of sight slightly forward. However, if the method of advancing the viewpoint as in the conventional technique is used, in such a case, the position of the viewpoint is lowered as shown in FIG. 11, and an unnatural movement different from the actual movement of the line of sight of the human being. There was a problem that became.

Further, when the method of rotating the line of sight at a building corner as in the prior art is used, as shown in FIG.
There was a problem that the movement was unnatural, different from the actual movement of the human line of sight, such as stopping at the corner of the building, changing the direction of the body and starting walking again.

Therefore, if the conventional line-of-sight editing apparatus is used, there is a problem that a perspective view close to what a human sees cannot be created by the three-dimensional CG system. The present invention has been made in view of such circumstances, and three-dimensional CAD
A new way to create perspective views that are close to what humans see when performing the editing process of viewpoints and gazing points that are necessary to create perspective views of 3D structures created by the system. An object is to provide a line-of-sight editing device.

[0009]

1 and 2 show the principle configuration of the present invention. In the figure, reference numeral 1 denotes a three-dimensional CG system, which is a CAD data management device 10 for managing structural data of a three-dimensional structure created by the three-dimensional CAD system.
And a CAD data management device 1 configured according to the present invention.
From the line-of-sight editing device 11 that executes the editing process of the viewpoint and the gazing point necessary for creating the perspective view of the three-dimensional structure managed by 0, and the viewpoint and the gazing point set by the gaze editing device 11, A drawing device 13 for creating a perspective view of a three-dimensional structure and drawing it on the display 12.

A line-of-sight editing apparatus 1 whose principle configuration is shown in FIG.
Reference numeral 1 denotes a setting means 110 for setting a movement vector having attributes of a movement direction and a movement amount, a viewpoint movement means 111 for moving a viewpoint by the movement vector when a sight line movement mode is designated, and a sight line movement mode. At the time of designation, the gazing point moving means 112 for moving the gazing point by the movement vector is provided.

On the other hand, the line-of-sight editing apparatus 11 whose principle structure is shown in FIG. 2 sets the viewpoint when the line-of-sight rotation mode is designated with the setting means 110 for setting the movement vector having the attributes of the movement direction and the movement amount. When the viewpoint moving means 113 that moves by the moving vector and the line-of-sight rotation mode are designated, the gazing point moving means 114 that moves the gazing point by the amount of the moving vector and when the line-of-sight rotation mode is designated,
A gazing point rotating means 115 for moving the gazing point after moving obtained by the gazing point moving means 114 by a rotation angle designated in a designated rotation direction around the viewpoint obtained by the viewpoint moving means 113 as a center. And a movement vector updating means 116 for updating the movement vector by moving the movement vector in the designated rotation direction by the designated rotation angle when the line-of-sight rotation mode is designated.

[0012]

In the line-of-sight editing apparatus 11 whose principle configuration is shown in FIG. 1, when the line-of-sight movement mode is designated, the viewpoint moving means 11
1 moves the viewpoint by the moving vector set by the setting means 110, and the gazing point moving means 112 moves the gazing point by the moving vector set by the setting means 110. Here, when preparing two types of moving directions of the viewpoint and the gazing point, that is, forward and backward, the viewpoint moving means 111 and the gazing point moving means 112 move the moving vector when the forward line-of-sight moving mode is designated. The movement processing is executed in the movement direction of the, and when the backward line-of-sight movement mode is designated, the movement processing is executed in the direction opposite to the movement direction.

According to the editing process of the viewpoint and the gazing point,
Since it is possible to move while always looking at the same direction, it is possible to accurately simulate the movement of the human line of sight when moving forward with the line of sight slightly downward, as shown in FIG.

On the other hand, in the line-of-sight editing apparatus 11 whose principle configuration is shown in FIG. 2, when the line-of-sight rotation mode is designated, the viewpoint moving means 113 moves the viewpoint by the movement vector set by the setting means 110, The viewpoint moving means 114 moves the gazing point by the movement vector set by the setting means 110. Then, the gazing point rotation means 115 rotates the designated gazing point obtained by the gazing point moving means 114 in the designated rotation direction with the moving point obtained by the gazing point moving means 113 as the center. Then, the movement vector updating unit 116 updates the movement vector by moving the movement vector by the designated rotation angle in the designated rotation direction.

According to the editing process of the viewpoint and the gazing point,
It becomes possible to accurately simulate the movement of the human line of sight when walking along a building and turning a corner. That is, it becomes possible to accurately simulate the movement of the human line of sight, which changes the direction of the line of sight while moving along the building.

More specifically, as shown in FIG.
When the viewpoint and the gazing point are moved from the point A to the point B according to the line-of-sight editing device 11 of FIG.
The viewpoint is moved from the point B to the point C using the movement vector, and the gazing point is rotated by the rotation operation. When the rotation direction is right and the rotation angle is designated as 45 degrees, the gazing point is rotated 45 degrees to the right around the viewpoint at the point C. At this time, the movement vector is also rotated by 45 degrees as indicated by in the figure.

Subsequently, according to the line-of-sight rotation mode, the viewpoint is moved from the point C to the point D using the updated movement vector, and the gazing point is rotated by the rotating operation.
When the rotation direction is right and the rotation angle is specified to be 45 degrees, the gazing point is rotated to the right 45 with the viewpoint at the point D as the center.
Rotate it once. At this time, the movement vector is also rotated by 45 degrees as indicated by in the figure. Subsequently, the viewpoint and the gazing point are moved from the point D to the point E according to the line-of-sight editing apparatus 11 of FIG.

In this way, the line-of-sight editing apparatus 1 of the present invention
According to 1, it becomes possible to edit the viewpoint and the gazing point necessary for creating the perspective view of the three-dimensional structure created by the three-dimensional CAD system so as to be suitable for the movement of the human line of sight. This makes it possible to create perspective views that are close to what humans see.

[0019]

EXAMPLES The present invention will be described in detail below with reference to examples. FIG. 5 illustrates the system configuration of the three-dimensional CG system 1 using the present invention.

The three-dimensional CG system 1 includes a three-dimensional data creating program 20, a line-of-sight editing program 21,
An animation is created by expanding the VTR control program 22, and the three-dimensional data creation program 20 uses the three-dimensional structure creation data (part size, shape, color, material, Placement etc.)
When the line of sight is created, the line-of-sight editing program 21 sequentially changes the coordinate positions of the viewpoint and the gazing point in accordance with the interactive processing with the user, and creates a perspective view of the three-dimensional structure when the gazing point is viewed from the viewpoint. It is displayed on the CRT, and the VTR control program 22 creates an animation by recording the created perspective views on the VTR.

FIG. 6 shows the overall structure of the execution processing of the line-of-sight editing program 21. As shown in this figure, the line-of-sight editing program 21 has three process modes of a line-of-sight change parameter setting process, a line-of-sight linear movement process, and a line-of-sight rotation process.
When the coordinate positions of the viewpoint and the gazing point are set, a drawing process is performed, and a perspective view of the three-dimensional structure when the gazing point is viewed from the viewpoint is created and displayed on the CRT.

FIG. 7 shows an example of a processing flow in the line-of-sight changing parameter setting process, FIG. 8 shows an example of a process flow in the line-of-sight linear movement process, and FIG. 9 shows a process in the line-of-sight rotation process. 1 illustrates an example of a flow. Next, the present invention will be described in detail according to these processing flows.

In the processing mode of the line-of-sight changing parameter setting process, the line-of-sight editing program 21 sets the initial coordinate positions of the viewpoint and the gazing point, and also sets the movement vector required in the processing modes of the line-of-sight linear movement processing and rotation processing. Further, the rotation angle and the rotation direction required in the processing mode of the rotation processing of the line of sight are set.

That is, when the user sets the line-of-sight changing parameter setting processing mode, the line-of-sight editing program 21 first requests a line-of-sight setting request from the user in step 1 as shown in the processing flow of FIG. When it is determined whether or not there is a line-of-sight setting request, the process proceeds to step 2, and by interacting with the user,
The line of sight is set by setting the coordinate positions of the viewpoint and the gazing point. On the other hand, when determining that there is no line-of-sight setting request, the process of step 2 is omitted and it is determined to use the line-of-sight indicated by the coordinate positions of the previously set viewpoint and gazing point.

Then, in step 3, it is judged whether or not there is a movement vector setting request from the user, and when it is judged that there is a movement vector setting request,
By proceeding to step 4 and interacting with the user, the direction and magnitude of the movement vector are set. On the other hand, when it is determined that there is no movement vector setting request, step 4
It is decided to use the previously set movement vector by omitting the processing of.

Then, the process proceeds to step 5, where it is judged whether or not there is a setting request of the rotation direction and the rotation angle from the user, and when it is judged that there is a setting request of the rotation direction and the rotation angle, step 6 is executed. Then, the user interacts with the user to set the rotation direction and the rotation angle. On the other hand, when determining that there is no request for setting the rotation direction and the rotation angle, the process of step 6 is omitted, and it is determined to use the rotation direction and the rotation angle that are set in advance.

In this way, the line-of-sight editing program 21
When the user designates the line-of-sight changing parameter setting processing mode, the initial coordinate positions of the viewpoint and the gazing point, the movement vector, the rotation angle, and the rotation direction are set.

On the other hand, the line-of-sight editing program 21 executes the line-of-sight and line-of-sight line linear movement processing using the set movement vector in the line-of-sight linear movement processing mode. That is, when the user designates the line-of-sight linear movement processing mode, the line-of-sight editing program 21 first sets the coordinate position of the current viewpoint (xe) in step 1 as shown in the processing flow. , ye, ze), and if the set movement vector is represented by (xm, ym, zm), xe '= xe + xm, ye' = ye + ym, ze '= ze + z
According to the conversion formula of m, the coordinate position (xe ', y of the new viewpoint
e ', ze').

Then, in step 2, if the coordinate position of the point of interest at the present time is represented by (xo, yo, zo) and the set movement vector is represented by (xm, ym, zm), then xo '= xo + Xm, yo '= yo + ym, zo' = zo + z
The coordinate position (x o ', y
o ', zo') is calculated.

In this way, the line-of-sight editing program 21
When the user specifies the line-of-sight linear movement processing mode, the processing for moving the viewpoint and the gazing point by the movement vector is executed.

According to the editing process of the viewpoint and the gazing point,
As described with reference to FIG. 3, it becomes possible to accurately simulate the movement of the human line of sight when moving forward with the line of sight slightly downward.

On the other hand, in the line-of-sight rotation processing mode, the line-of-sight editing program 21 executes the line-of-sight rotation process using the set movement vector and the set rotation direction and rotation angle.

That is, when the user designates the rotation processing mode of the line of sight, the line-of-sight editing program 21 first, in step 1, as shown in the processing flow of FIG.
If the current coordinate position of the viewpoint is represented by (xe, ye, ze) and the set movement vector is represented by (xm, ym, zm), then xe '= xe + xm, ye' = ye + ym, ze '= ze + z
The coordinate position (xe ', ye', ze ') when the coordinate position of the viewpoint is moved by the movement vector is obtained according to the conversion formula of m ,.
This coordinate position (xe ', ye', ze ') becomes the coordinate position of the new viewpoint.

Then, in step 2, if the current coordinate position of the point of interest is represented by (xo, yo, zo) and the set movement vector is represented by (xm, ym, zm), then Xo = xo + xm , Yo = yo + ym, Zo = zo + z
The coordinate position (Xo, Yo, Zo) when the coordinate position of the gazing point is moved by the movement vector is obtained according to the conversion formula of m ,.

Then, in step 3, the set rotation direction is d, and the set rotation angle is θ (rotation direction d
Represents the positive / negative of the rotation angle θ),

[0036]

[Equation 1]

In accordance with the conversion formula of (1), the moving gazing point obtained in step 1 is rotated around the moving point obtained in step 1 by the rotation angle θ in the rotation direction d.
The coordinate position (xo ', yo', zo ') of the new gazing point is calculated. Here, “K (θ, d)” in the formula [1] is

[0038]

[Equation 2]

It is represented by Subsequently, in step 4, the movement vector is (xm, ym, zm), the set rotation direction is d, and the set rotation angle is θ (the rotation direction d designates positive or negative of the rotation angle θ). If expressed by

[0040]

(Equation 3)

A new movement vector (xm ', ym', zm ') is obtained by rotating the movement vector in the rotation direction d by the rotation angle .theta. Here, “K (θ, d)” in the formula [3] is as described above.

In this way, the line-of-sight editing program 21
When the rotation processing mode of the line of sight is specified by the user,
After moving the viewpoint and the gazing point by the moving vector, the moving point is moved around the moving point by the rotation angle set in the set rotation direction and the moving vector is set. It moves by the rotation angle set in the rotation direction.

According to the editing process of the viewpoint and the gazing point,
As described with reference to FIG. 4, it becomes possible to accurately simulate the movement of the human line of sight when walking along a building and turning a corner.

FIG. 10 shows an embodiment of the screen configuration of the display screen opened by the line-of-sight editing program 21 for executing this editing process. In this embodiment, the line-of-sight editing program 21 displays 3 in the α area of the display screen.
The top view of the three-dimensional structure is displayed, and the front view of the three-dimensional structure is displayed in the β region. In these two drawings,
It has a structure that displays the current viewpoint and the point of gaze, and when viewing the point of gaze from that point in the γ area, 3
Adopt a configuration to display a perspective view of a three-dimensional structure, and δ
The configuration is such that operation buttons are displayed in the area.

According to this screen configuration, the user operates the viewpoint setting button developed in the δ area to set the coordinate position of the viewpoint, and operates the gazing point setting button to operate the coordinate position of the gazing point. And the movement vector setting button is operated to set the movement vector. Then, the rotation angle is set by operating the change angle setting button developed in the δ area, and the movement amount in the line-of-sight direction is set by operating the movement amount setting button.

When this setting process is completed, the user operates the line-of-sight movement button developed in the δ area when executing the line-of-sight linear movement process of the present invention according to the process flow of FIG. When this operation is executed, the line-of-sight editing program 21 moves the viewpoint and the gazing point by the movement vector according to the processing flow of FIG. In addition,
In addition to the movement mode for moving the viewpoint and the gazing point by the movement vector, when the movement mode for moving the movement vector in the opposite direction of the movement vector is provided, the forward button and the backward button developed in the δ area are enabled. The configuration is adopted and the viewpoint and the gazing point are moved according to which of these is operated.

Further, when the user executes the line-of-sight rotation processing of the present invention according to the processing flow of FIG. 9, after operating the line-of-sight rotation button developed in the δ area, four of the four lines developed in the δ area are displayed. Operate any one of the rotation direction buttons (one of the up, down, left and right directions can be selected). When this operation is executed, the line-of-sight editing program 21
In accordance with the processing flow of FIG. 9, the line of sight is rotated using the movement vector and the change angle set in the δ area.

Further, as in the prior art, when the user moves the viewpoint forward in the direction of the gazing point, the user operates the forward button expanded in the δ area, and when moving backward, the user expands in the δ area. Operate the reverse button. When this operation is executed, the line-of-sight editing program 21 displays δ
The viewpoint is moved forward or backward in the gazing direction by the amount of movement set in the area.

When rotating the viewpoint around the gazing point as in the prior art, the user operates the viewpoint rotation button expanded in the δ area, and then the four expanded in the δ area. Operate any one of the rotation direction buttons. When this operation is executed, the line-of-sight editing program 21 rotates the viewpoint by the change angle set in the δ area.

When rotating the gazing point around the viewpoint as in the prior art, the user operates the gazing point rotation button developed in the δ area and then expands in the δ area. One of two rotation direction buttons
Operate one. When this operation is executed, the line-of-sight editing program 21 rotates the gazing point by the change angle set in the δ area.

[0051]

As described above, according to the present invention,
Since the viewpoint and gazing point necessary for creating a perspective view of a three-dimensional structure created by a three-dimensional CAD system can be edited to match the movement of the human eye, You will be able to create perspective views that are close to things.

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is a principle configuration diagram of the present invention.

FIG. 3 is an explanatory diagram of a line-of-sight movement process of the present invention.

FIG. 4 is an explanatory diagram of a line-of-sight rotation process of the present invention.

FIG. 5 is a system configuration diagram of a three-dimensional CG system using the present invention.

FIG. 6 is an explanatory diagram of execution processing of a line-of-sight editing program.

FIG. 7 is a process flow of a line-of-sight change parameter setting process.

FIG. 8 is a processing flow of a line-of-sight linear movement processing.

FIG. 9 is a process flow of a line-of-sight rotation process.

FIG. 10 is an example of a screen configuration of a display screen opened by the line-of-sight editing program.

FIG. 11 is an explanatory diagram of a conventional technique.

FIG. 12 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 1 3D CG system 10 CAD data management device 11 line-of-sight editing device 12 display 13 drawing device 110 setting means 111 viewpoint moving means 112 gazing point moving means 113 viewpoint moving means 114 gazing point moving means 115 gazing point rotating means 116 moving vector updating means

Claims (4)

[Claims] 1. In a line-of-sight editing apparatus that executes a process of editing a viewpoint and a gaze point necessary for creating a perspective view of a three-dimensional structure created by a three-dimensional CAD system, attributes of a moving direction and a moving amount. And a viewpoint moving means for moving the viewpoint by the above-mentioned movement vector when the line-of-sight moving mode is specified, and a moving point for moving the gaze point when the line-of-sight moving mode is specified. A line-of-sight editing apparatus characterized in that it is provided with a gazing point moving means for moving by a vector. 2. The line-of-sight editing apparatus according to claim 1, wherein the line-of-sight movement mode includes a forward line-of-sight movement mode and a backward line-of-sight movement mode. The means executes the moving process in the moving direction of the moving vector when the forward line-of-sight moving mode is designated, and executes the moving process in the direction opposite to the moving direction when the backward line-of-sight moving mode is designated. A line-of-sight editing device characterized by processing as described above. 3. A line-of-sight editing apparatus that executes a process of editing a viewpoint and a gaze point necessary for creating a perspective view of a three-dimensional structure created by a three-dimensional CAD system, attributes of a moving direction and a moving amount. Setting means for setting a movement vector having a point, and a viewpoint moving means for moving the viewpoint by the above-mentioned movement vector when the line-of-sight rotation mode is specified When the gaze point moving means that moves by a vector and the line-of-sight rotation mode are specified, the gaze point after the movement obtained by the gaze point moving means is centered around the gaze point after the movement obtained by the gaze point moving means. A line-of-sight editing apparatus comprising: a gaze point rotation unit that moves the designated rotation direction by a designated rotation angle. 4. The line-of-sight editing apparatus according to claim 3, wherein when the line-of-sight rotation mode is designated, the movement vector is updated by moving the movement vector by a designated rotation angle in a designated rotation direction. A line-of-sight editing device characterized by comprising.