JPH08123983A - Projection plane associated display device - Google Patents

Abstract

PURPOSE: To display a front elevation, a side elevation, and a bottom elevation of a specific part of an object in respective windows where different projection planes are displayed at all times and make a slave window follow up the motion of a main window. CONSTITUTION: Several kinds of window obtained by viewing the object from an optional projection plane are displayed, and a moving direction and a movement quantity are indicated for one main window to move other windows together at a time. Consequently, when an indicated movement quantity detection part 2 detects the moving direction and movement quantity of a mouse, a projection plane association processing part 4 generates three-dimensional vectors first from the movement contents of the main window. Then two-dimensional vectors viewed from the projection planes of the respective slave windows have coordinates converted respectively on the basis of the three-dimensional vectors, and consequently the movement indication to the main window is reflected on other slave windows. Thus, the slave windows can be moved as much as required simultaneously with the movement of the main window.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection plane interlocking display device for simultaneously displaying several projection planes of graphic data on a display or the like in a CAD system for computer drawing creation and design support.

[0002]

2. Description of the Related Art A CAD system has been widely adopted in order to assist a computer in drawing creation and design work. In this system, for example, various projection planes in which a target object under design is viewed three-dimensionally, such as a front view, a side view, and a bottom view, are displayed to support the creation and correction work. Further, for example, when the front view is displayed, a part of the front view can be enlarged and further detailed display can be performed.

[0003]

The conventional CAD system as described above has the following problems to be solved. For example, when looking at a front view of an object and correcting or enlarging a part of the object, it is sometimes desired to simultaneously display a side view and a bottom view of the part. In this case, a part of the front view is displayed in one window, another window is opened on the same screen of the display, and a part of the side view is displayed here. At the same time, another window is opened and a part of the bottom view is displayed here. As a result, the operator displays a drawing of a part of the target object viewed from several kinds of projection planes on one display, and performs corrections without contradiction. However, for example, if you try to move the viewpoint to a different location on the same projection plane, you can move the windows individually to the desired positions, such as the front view window, side view window, and bottom view window. You have to perform some actions.

Such an operation is not so easy that the drawing becomes complicated, and if the window is moved to an appropriate place,
There was a problem that the work of designing was delayed because the configuration of the target part could not be grasped accurately.

[0005]

The present invention adopts the following constitution in order to solve the above problems. When a main window occupying an arbitrary area is set on an arbitrary projection plane related to an object displayed on the display and the movement direction and movement amount of the main window are instructed, the instruction movement amount detection is recognized. Section and a sub window for displaying the state of the object viewed from the main window as seen from any other projection surface, accepting the output of the instruction movement amount detection section, and linked with the movement of the main window. And a projection plane interlocking processing unit that changes the display state of the secondary window.

It should be noted that there is provided a coordinate designating unit for designating the display coordinates of the cursor displayed on the display, and the designated movement amount detection unit provides information on the movement direction and the movement amount of the cursor in the main window displayed on the display. , Can be recognized as the moving direction and moving amount of the main window.

Further, the projection plane interlocking processing section converts a two-dimensional vector indicating a moving direction and a moving amount of the main window on the projection plane into a three-dimensional vector for projecting an object, A two-dimensional conversion unit that converts this three-dimensional vector into a two-dimensional vector on the projection surface that displays the slave window may be provided.

Further, when an arbitrary main control point is set on an arbitrary projection plane displayed on the display and the moving direction and the moving amount of the main control point are instructed, the instructed moving amount is recognized. The detection unit and the main control point, generate a slave control point for indicating the position on any other projection plane, accept the output of the instruction movement amount detection unit, and link with the movement of the main control point, A projection plane interlocking processing unit that changes the position of the slave control point on the slave window may be provided.

At this time, the main control point indicates a reference position for controlling the enlarged display of the main window on the projection surface displayed on the display, and the slave control point indicates the slave position on another projection surface displayed on the display. It is possible to indicate the reference position for controlling the enlarged display of the window.

Further, the main control point indicates the cursor position for controlling the display of the end point of the figure on the projection surface displayed on the display, and the sub control point is the end point of the figure on the other projection surface displayed on the display. The cursor position for display control can also be indicated.

[0011]

In this device, several kinds of windows of the object viewed from an arbitrary projection plane are displayed, and by designating the moving direction and the moving amount for one main window, the other windows are moved simultaneously. . For this reason, when the movement direction and the movement amount of the mouse are detected by the designated movement amount detection unit, the projection plane interlocking processing unit first generates a three-dimensional vector from the movement contents of the main window. Then, based on the three-dimensional vector, coordinate conversion is performed on each two-dimensional vector viewed from the projection plane of each slave window, and the movement instruction for the main window is reflected in the other slave windows. Thus, the sub-window is moved by the required amount at the same time as the movement of the main window. Therefore, in each window displaying a different projection plane, a front view of a predetermined part of the object is always displayed,
The side view and bottom view are displayed, and the window is made to follow the movement of the main window.

[0012]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a functional block diagram showing an embodiment of a projection surface display device of the present invention. In the figure, this device includes a coordinate designating unit 1, a designated movement amount detecting unit 2, a designated projection plane detecting unit 3, a projection plane interlocking processing unit 4, a window moving unit 5, a viewport display unit 6, a display 7, a display projection plane. An ID storage unit 8, a projection surface display control unit 9, each projection surface window storage unit 10, each projection surface viewport storage unit 11, and each projection surface all graphic image storage unit 12 are provided. Before describing the details of each part, the appearance of a general CAD device will be described with reference to FIG.

FIG. 2 is an external view of a CAD device for embodying the above device. This device includes a display 7, a control unit 15 for controlling the display, a keyboard 16, a mouse 17, and the like. With this device, the operator uses the keyboard 16 to view or modify the drawing while looking at the drawing displayed on the display 7. Mouse 17
Is for designating a position for performing an operation, and for performing an operation in place of a keyboard including the designation of other icons. In the device of the present invention, the keyboard 16 and the mouse 17 are used as the coordinate pointing unit 1 shown in FIG. As a result, an arbitrary position on the display 7 is designated, and the moving amount and moving direction of the window are designated. The control unit 15 accommodates the remaining portion except the coordinate designating unit 1 and the display 7 shown in FIG.

Here, in the present invention, an arbitrary projection plane for an arbitrary object is displayed on the display 7 as shown in FIG. The projection plane is a drawing of a target object viewed from a three-dimensional direction such as a front view, a side view, and a bottom view.
When such a drawing is displayed, a window is set on each of several types of projection planes, and a part of the object is displayed in the window. This display can be enlarged or reduced. Then, when one window is set as the main window and this window is moved, the part of the object displayed in the other window also moves in conjunction therewith. This is a characteristic part of the present invention.

For this purpose, as shown in FIG. 1, a coordinate designating unit 1 for designating this moving amount and a designated moving amount detecting unit 2 for detecting the designated moving amount are provided. The coordinate pointing unit 1 is composed of a pointing device such as a mouse,
The designated movement amount detection unit 2 is composed of a circuit, a register and the like for reading the coordinate data. The pointing projection plane detection unit 3 is currently displayed on the display 7, and the coordinate pointing unit 1
Is a part for detecting whether the projection surface on which the cursor is brought in is a front view or a side view. This is realized by recognizing which projection plane is displayed in which area on the display and further detecting the position of the cursor designated by the coordinate designating unit 1.

The display projection plane ID storage unit 8 stores an ID for each projection plane displayed on the display 7, that is, an identification code of the projection plane. For example, the front view is stored as “01”, the right side view is stored as “02”, and so on. The projection surface display control unit 9 reads such an ID from the display projection surface ID storage unit 8 and determines the projection surface displayed on the display 7 as the projection surface interlocking processing unit 4, the window moving unit 5, and the viewport display unit. It is a part for notifying to No. 6. The output of the designated movement amount detection unit 2 and the output of the designated projection surface detection unit 3 are input to the A and B terminals of the projection plane interlocking processing unit 4, respectively. The projection surface display control unit 9 recognizes which projection surface is currently displayed on the display 7, and outputs the ID to the C terminal or the like of the projection surface interlocking processing unit 4.

The concrete construction of the projection plane interlocking processing section 4 is shown in FIG.
Before that, the outline of the interlocking display control by the apparatus of the present invention will be described with reference to FIGS. FIG. 3 is an explanatory view of the interlocking display screen, and FIG. 4 is an explanatory view of the projection surface for the interlocking display. As shown in FIG. 3A, for example, the display 7 displays three types of windows W1, W2, and W3. These windows display, for example, a front view, a right side view, and a part of a bottom view of the object, respectively. Therefore, when a part of the object displayed in the window W1 is viewed from the right, it is displayed in the window W2, and when viewed from the bottom, it is displayed in the window W3.

Here, in the present invention, for example, the operator uses a pointing device or the like to move the cursor in the direction of the arrow. That is, for example, a mouse button is pressed at the position of the point P, and in that state, the cursor is moved in the direction of the arrow. This movement is called dragging, and the mouse button is released at the position of point Q. In this case, the window W1 just slides in the direction opposite to the arrow, and the position at which the object is viewed is changed. In the present invention, the window W1 serving as a reference for interlocking display is used as the main window,
The windows W2 and W3 are sub-windows. And
When the main window W1 is moved, the subordinate windows W2 and W3 are also automatically moved so that the same location of the object is in front,
It performs actions such as being able to see the side and bottom. In (b), windows W1, W2, W3 after such interlocking processing are displayed.

FIG. 4 shows a projection plane explanatory diagram for such interlocked display. As shown in this figure, the whole image of the object is drawn as a front view, a right side view, and a bottom view, and these are stored in each projection plane all-figure image storage unit 12 shown in FIG. Then, as shown in the figure, the lower right part of the front view of the object is displayed in the window W1, the lower right part of the right side view is displayed in the window W2, and the lower right part of the bottom view is displayed in the window W3. To do. When the cursor is present in the window W1, the instructed projection plane detection unit 3 shown in FIG. 1 detects that the window W1 is displaying a front view, and notifies the projection plane interlocking processing unit 4. . Further, the projection surface display control unit 9 notifies each unit that the window W1 is displaying a front view, the window W2 is displaying a right side view, and the window W3 is displaying a bottom view.

FIG. 5 is a conceptual diagram of projection plane vector conversion information when the present invention is applied to the third angle method. In the present invention, the three-dimensional coordinate system is set for each projection plane in this way for the interlocking display of the windows as described above. For example, the front view of the figure is in the XY plane, and the right side view is YZ.
Exists in the plane. In addition, the left side view also exists in the YZ plane,
The plan view is in the XZ plane. The bottom view also exists in the XZ plane.

As described above, in order to display the state of the object viewed from the main window as viewed from another arbitrary projection surface in the slave window and change the display state of the slave window in conjunction with the movement of the main window. Needs to convert the movement of the window on the front view into the movement of the window on the right side view or the bottom view. In this case, for the three-dimensional coordinate system as shown in the figure, (x, y,
Conversion information such as *), (*, y, x), (x, *, y) is used. This action will be described later.

FIG. 6 shows a detailed block diagram of the projection plane interlocking processing section. The projection surface interlocking processing unit 4 shown in FIG. 1 includes a three-dimensional conversion unit 41 that receives a conversion source two-dimensional vector 51 and a conversion source projection surface ID52, a projection surface vector conversion information storage unit 43, as shown in FIG. It is composed of a three-dimensional vector 54, a conversion target projection surface ID 53, and a two-dimensional conversion unit 42 that receives the output of the projection surface vector conversion information storage unit 43. The two-dimensional conversion unit 42 uses the conversion destination two-dimensional vector 55.
Is a part for generating and outputting.

The conversion source two-dimensional vector 51 is vector data indicating the movement direction and movement amount of the main window designated by the mouse or the like on the main window in the manner described above. For example, in the example of FIG. 4, the conversion source two-dimensional vector R1 is displayed in the window W1. This vector R1 is just in the opposite direction to the arrow PQ shown in FIG. That is, the main window moves in this direction. Since the front view showing the main window W1 is in the XY plane, its two-dimensional vector is, for example, (-1,2). The conversion source projection plane ID 52 is an identification symbol of the projection plane on which the main window is displayed, and is data having a content such as a front view. The projection plane vector conversion information storage unit 43 stores the conversion information described with reference to FIG.

The three-dimensional conversion unit 41 uses these inputs to generate, for example, a three-dimensional vector in a front view.
Since the front view is in the XY plane, X is -1, Y is 2, and Z is 0 because the main window does not move in the Z direction. Therefore, the three-dimensional vector 54 as shown on the left side of FIG. 6 is obtained by applying this to the conversion information. This is (x,
y, *) and the contents are (-1,
2,0). Here, the conversion target projection plane ID 53 and the three-dimensional vector 54 are input to the two-dimensional conversion unit 42. In the two-dimensional conversion unit 42, when the conversion destination projection surface is a right side view, the conversion information (*, y, x) is converted into the conversion information storage unit 4
Receive from 3. Then, as shown on the left side of FIG.
The output of the three-dimensional conversion unit 41 is associated with each other. And
In this example, the X coordinate is *, the Y coordinate is the Y coordinate,
Data is transferred to the X-coordinate and converted, respectively. That is, the conversion information is transcribed so as to move in parallel for each projection plane. As a result, the two-dimensional conversion unit 42
The Y coordinate is "2" and the X coordinate is "0". This becomes the destination two-dimensional vector 55. Therefore, in the case of the right side view, the result that the window needs to be moved by 2 in the Y direction is obtained.

As described above, the projection plane interlocking processing unit 4 generates the sub window for displaying the state of the object viewed from the main window as seen from another arbitrary projection plane, and the instruction movement amount detecting unit. The output state of the sub window is changed in synchronization with the movement of the window. In this case, the moving direction and moving amount of the cursor in the main window are recognized as the moving direction and moving amount of the main window, and are accepted as the conversion source two-dimensional vector. Then, the two-dimensional vector is converted into a three-dimensional vector using the conversion information,
Further, this three-dimensional vector is converted into a two-dimensional vector on the projection surface that displays the slave window which is the projection surface of the conversion destination. By this, the movement amount of the slave window is known, and the display control of the slave window is performed.

The window moving section 5 shown in FIG. 1 receives the output of the projection plane interlocking processing section 4 and moves the area displayed in the window in accordance with the instruction. Each projection plane window storage unit 10 stores the result, and each projection plane viewport storage unit 11 holds the viewport area of each projection plane. The viewport is shown in Figure 3 (a) or (b).
The area displayed on the display 7 as shown in FIG. The window moving unit 5 takes out the previously displayed window area from each projection plane window storage unit 10 in a data format such as reference position coordinates, and outputs only the two-dimensional vector obtained by the projection plane interlocking processing unit 4. The calculation for moving is performed and the result is stored again in the projection plane window storage unit 10. The viewport display unit 6 takes out a window area relating to the projection plane to be displayed from each projection plane window storage unit 10, and cuts out a graphic image corresponding to that portion from each projection plane whole graphic image storage unit 12. Then, these graphic images are displayed side by side in the corresponding viewport area extracted from each projection plane viewport storage unit 11. The result is as shown in FIG.

In this way, the graphic display areas of the windows on all the projection planes move in conjunction with the instruction to move the graphic display areas of the windows on the arbitrary projection planes, and each window is maintained while maintaining a three-dimensional positional relationship with each other. Are displayed together on the display 7. In addition, in FIG.
All the three-dimensional conversion processing explanatory views shown in FIG. In the above example, the conversion processing example of the front view and the right side view is shown, but as shown in this figure, the conversion information for the front view, the right side view, the left side view, and the bottom view is shown in this figure. Then, the corresponding movement vector can be easily obtained for any projection plane. That is, as shown in this figure, X on the front view
= -1 and Y = 2, X = 0, Y = 2 in the right side view, X = 0, Y = 2 in the left side view, and X = -1, Y = in the plan view. 0, bottom view X = -1, Y =
Calculation processing such as 0 is possible.

FIG. 8 shows an interlocking explanatory diagram of the enlargement center as a modified example of the present invention. In this figure, a main window W1 and two subsidiary windows W2 and W3 are displayed on the display 7. Here, for example, consider enlarging and displaying a part of the front view displayed in the main window. In this case, the display magnification is first set by a command or the like, and the center of the screen to be displayed is designated. This is to specify which part is the reference for enlarging the screen.

When the center of the enlarged display screen is designated as a point M12, for example, the position is shifted from the center point M11 of the currently displayed screen as shown by an arrow. Sub window W2
Also for W3, it is preferable to enlarge the screen at the same rate and display the projection surface of the same portion. Then, point M in the way already explained
When 11 moves to the point M12, the moving amount and direction of the center points M21 and M31 of the screens of other windows are calculated. Then, at the same time when the enlargement ratio is changed, the center of the screen is also linked and shifted.

As described above, when the center of the screen serving as the reference position for enlarged display control and other appropriate positions on the window are set and the reference position on the main window is called the main control point, the reference position on the slave window is set. By linking the slave control points, it is possible to easily link the enlarged display screen. In addition to the display such as the enlargement ratio of 2 × or 3 ×,
It also includes the display of decimal fractions such as double and 0.3 times.

FIG. 9 shows an interlocking explanatory diagram of line segment display as still another modification of the present invention. The present invention can be applied not only to moving a window displayed on a display but also to reflecting a line segment displayed on one projection surface on the display on another projection surface. In the main window W1 shown in FIG. 9, line segments connecting the end points P11 and P12 are displayed. If this line segment is the two-dimensional vector described in the previous embodiments, a figure of this line segment viewed from another projection plane can be obtained by the same calculation as in the previous embodiments.

The line segment connecting the end points P21 and P22 and the line segment connecting the end points P31 and P32 shown in the sub-windows W2 and W3 of FIG. 9 are line segments viewed from the respective projection planes. As a method of displaying the line segment on the main window, for example, a method of moving the cursor to each of the end points P11 and P12 with a mouse and clicking is generally used, and the line segment viewed from each projection plane is simultaneously displayed by this operation. Can be made.

The present invention is not limited to the above embodiments. The main window and the sub windows may be displayed side by side on the display, or they may be partially overlapped and displayed. Further, the pointing of the moving direction and the moving amount may be performed by using a pointing device such as a mouse, or by using a keyboard or other coordinate input device. The movement direction and the like may be instructed not on the main window but on another part of the display. Any other plane of projection of the object seen through the main window is not necessarily limited to the Cartesian coordinate system.

Although it is preferable that the main window and the sub-window display the object at substantially the same enlargement ratio,
It is possible to set arbitrary enlargement ratios as needed. Further, the method of converting the two-dimensional vector indicating the moving direction and the moving amount of the main window into the two-dimensional vector on the projection surface displaying the sub-window is not limited to the above example, and various methods can be adopted. Further, the projection plane interlocking processing section may perform only vector conversion, or may have an image processing function incorporating the other functional blocks shown in FIG.

[0035]

According to the projection surface interlocking display device of the present invention described above, a main window occupying an arbitrary area is set on an arbitrary projection surface relating to an object displayed on the display, and the main window is moved. When a direction and a movement amount are instructed, an instruction movement amount detection unit for recognizing the direction and an object that can be seen from the main window, and a sub window for displaying a state viewed from another arbitrary projection surface are generated, It has a projection plane interlocking processing unit that accepts the output of the instruction movement amount detection unit and changes the display state of the sub window in synchronization with the movement of the main window, so any window on the display in any direction When the window is moved, the window viewed from another projection plane moves accordingly.

Therefore, it becomes possible to observe each part of the object in detail and from each direction, and easily carry out a correction inspection of the drawing. Therefore, the user can easily recognize the three-dimensional shape while looking at the two-dimensional shape. Further, the present invention is not limited to a two-dimensional CAD system and can be similarly applied to a three-dimensional CAD system, and is not limited to a display device for moving a display area, and a line segment drawn on a certain projection surface may be used. It can be widely adopted for display devices that are reflected on the projection surface of the.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a projection surface display device of the present invention.

FIG. 2 is an external view of a CAD device.

FIG. 3 is an explanatory diagram of an interlocking display screen.

FIG. 4 is a projection plane explanatory diagram for interlocking display.

FIG. 5 is a conceptual diagram of projection plane vector conversion information applicable to the third angle method.

FIG. 6 is a block diagram of a projection plane interlocking processing unit.

FIG. 7 is an explanatory diagram of a three-dimensional conversion process.

FIG. 8 is an explanatory diagram of interlocking with an enlargement center.

FIG. 9 is an explanatory diagram of interlocking line segments.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coordinate instruction unit 2 Indication movement amount detection unit 3 Indication projection surface detection unit 4 Projection surface interlocking processing unit 5 Window movement unit 6 Viewport display unit 7 Display 8 Display projection surface ID storage unit 9 Projection surface display control unit 10 Each projection surface Window storage unit 11 Each projection surface viewport storage unit 12 Each projection surface All figure image storage unit

Claims (6)

[Claims] 1. When a main window occupying an arbitrary area is set on an arbitrary projection plane of an object displayed on a display and a moving direction and a moving amount of the main window are designated, this is recognized. An instruction movement amount detection unit to do, generate a slave window for displaying the state of the object viewed from the main window as viewed from any other projection plane, and accept the output of the instruction movement amount detection unit, A projection plane interlocking display device comprising a projection plane interlocking processing unit that changes a display state of the sub window in association with movement of the main window. 2. A coordinate instruction unit for instructing display coordinates of a cursor displayed on a display, wherein the instructed movement amount detection unit is information regarding a movement direction and an amount of movement of the cursor in a main window displayed on the display. 2. The projection plane interlocking display device according to claim 1, wherein is recognized as a moving direction and a moving amount of the main window. 3. The projection surface interlocking processing unit, a three-dimensional conversion unit for converting a two-dimensional vector indicating a moving direction and a moving amount of the main window on the projection surface into a three-dimensional vector for object projection, The projection plane interlocking display device according to claim 1 or 2, further comprising: a two-dimensional conversion unit that converts the three-dimensional vector into a two-dimensional vector on a projection surface that displays a sub window. 4. An instruction movement amount for recognizing, when an arbitrary main control point is set on the arbitrary projection plane displayed on the display and the movement direction and movement amount of the main control point are instructed. A detection unit and a sub-control point for indicating the position of the main control point on the other arbitrary projection plane are generated, and the output of the instruction movement amount detection unit is accepted to interlock with the movement of the main control point. Then, the projection plane interlocking display device is provided with a projection plane interlocking processing unit that changes the position of the subordinate control point on the subordinate window. 5. The main control point indicates a reference position for controlling enlarged display of a main window on a projection surface displayed on the display, and the slave control point on another projection surface displayed on the display. 5. The projection plane interlocking display device according to claim 4, wherein a reference position for enlarging display control of the slave window is shown. 6. The main control point indicates a cursor position for end point display control of a figure on a projection surface displayed on the display, and the slave control point indicates a figure on another projection surface displayed on the display. 5. The projection surface interlocking display device according to claim 4, wherein the cursor position is used to control the end point display control of the display device.