JPH0248942B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is based on CAD (Computer Aided Design).
This invention relates to a system for performing graphical processing, especially a drafting method.

[Conventional technology]

FIG. 7 shows the figure display screen 1 of the conventional two-dimensional drafting method, and the magnification of each projection view 2 to 4 is set independently and at the same value in both the X-axis direction and the Y-axis direction. The drawing progressed by repeatedly reducing the size. FIG. 8 is a block diagram showing an example of the configuration of a conventional two-dimensional drawing device. In the figure, 14 is a display device, 15 is a display storage device,
16 is a keyboard, 17 is a point position input device, 18
1 is a graphic input/output control device, and 19 is a graphic storage device. 20 ₁ to 20 _o have the same internal configuration and store the first projection view to the nth projection view, respectively.
The to n-th projection diagram storage units are arranged side by side to form a graphic storage device 19. 21 ₁ to 21 _o are projection view area storage units that store data indicating area 5 of the projection view, 22 ₁ to 22 _o are projection view magnification storage units that store the magnification of the projection view, and 23 ₁ to 23 _o are projection views. This is a projection figure data storage unit that stores figures. These are the first to n-th projection storage units 20 ₁ to 20 _o
It constitutes the inside of.

The first to n-th projection view storage units 20 ₁ to 20 _o correspond to projection views 2 to 4 that are displayed simultaneously, such as the figure display screen 1 in FIG. 7, and in this case, at least three projection view storage units 20 ₁ , 20 ₂ , 2
0 ₃ will be required. To simplify the explanation below,
The projection view storage unit 20 _i that stores an arbitrary i-th projection view (1 inch) will be described.

The figure input control device 18 inputs data such as the magnification and basic figure name of each projection figure input from the keyboard 16 and the point position information etc. input from the point position input device 17 to the corresponding projection figure in the figure storage device 19. The data is stored in the storage unit _20i . Further, this graphic input/output control device 18 reads out data stored in the projection drawing storage section _20i , stores it in the display storage device 15, and displays it on the display screen of the display device 14 as necessary.

FIG. 9 shows an example of a conventional graphic input processing procedure, in which the graphic input process is performed through a projection diagram outline setting step 30, a projection diagram input stage 31, and a projection diagram display stage 32. First, projection drawing outline setting step 30
Then, the origin position T ⁱ _x , T ⁱ _y of the i-th projection, and the area position
D ⁱ _x , D ⁱ _y and magnification f ⁱ are set (steps 33 to 35). That is, the graphic input control device 18 sets the point information x, y input from the point position input device 17 as origin positions T ⁱ _x , T ⁱ _y , and then sets the point information x, y input in the same way as the area D. Both are stored and set in the projection area storage unit 21 _i of the corresponding projection view storage unit 20 _i as ⁱ _x and D ⁱ _y (steps 33 and 34). next,
The graphic input/output control device 18 stores and sets the numerical value inputted from the keyboard 16 as a magnification f ⁱ in the projection view magnification storage unit 22 _i of the corresponding projection view storage unit 20 _i (step 35).

In the next projection drawing input step 31, basic shape names E such as circles, lines, curves, etc. and point information strings P input from the keyboard 16 and point position input device 17 are stored. That is, the graphic input control device 18 determines the i-th projection diagram to be input by determining the point information x, y input from the point position input device 17 using the following equation (1) (step 36).

T ⁱ _x ≦x≦D ⁱ _x T ⁱ _y ≦y≦D ⁱ _y (1) Next, the graphic input/output control device 18 calculates the i-th The true coordinate position of the projection view is generated (step 37).

=(x-T ⁱ _x )/f ⁱ =(x-T ⁱ _y )/f ⁱ (2) In addition, the graphic input/output control device 18 performs step 37.
Keyboard 1 to the true coordinate position generated by
The i-th projection diagram determined in step 36 is stored in the projection diagram data storage unit 23 _i of the projection diagram storage unit 20 _i as basic diagram data with the basic figure name E inputted from step 6 (step 38). .

In the next projection view display step 32, a display shape is generated from the basic figure data stored in step 38 of the projection view input step 31. That is, the figure input/output control device 18 reads the basic figure name E of the basic figure data and the point information sequence P which is its shape factor from the projected figure data storage unit _{23 i} of the projection figure storage unit 20 i, and determines the true shape. (Step 39). For example, if the basic figure name is a circle, the true shape is determined by the point information sequence P indicating the center and radius. Furthermore, the graphic input/output control device 18 converts each point x of the true shape into a display shape E゜(x゜, y゜) on the display screen of the display device 14 using the following equation (3). Step 40). Also, x゜=x×f ⁱ +T ⁱ _x y゜=y×f ⁱ +T ⁱ _y ...(3) The graphic input/output control device 18 creates a display shape E゜(x゜, y°) is stored in the display storage device 15 (step 41).

T ⁱ _x ≦x゜≦D ⁱ _x T ⁱ _y ≦y゜≦D ⁱ _y (4) Furthermore, the graphic input/output control device 18 uses the display shape E゜(x゜, y ) is transferred to the display device 14, and the basic figure E is displayed on the display screen in the display shape E° in the area of the i-th projection view.

[Problem that the invention seeks to solve]

However, in the drafting method of the prior art,
The magnification of each projection view was set to the same value in both the X-axis direction and the Y-axis direction, and each projection view was enlarged and reduced separately. Therefore, since the area of the graphic display screen is smaller than that of a drawing board, each projection drawing becomes small when drawing large parts or devices, and it is difficult to grasp the dimensional correspondence between each projection drawing. It was not practically satisfactory.

The present invention solves the above-mentioned disadvantages that each projection drawing is small and that it is difficult to grasp the dimensional correspondence between each projection drawing, and provides excellent workability and applicability in two-dimensional drafting. have
It provides a drafting method in CAD.

[Means for solving problems]

In order to solve the above problems, the present invention provides a display device that displays a plurality of projection views, a graphic storage device that stores data corresponding to each projection view displayed on the display device, and a graphic storage device that stores data that corresponds to each projection view displayed on the display device. In a CAD drawing method that includes a control device that stores data in the graphic storage device and displays it on the display screen of the display device, and draws by repeatedly enlarging and contracting each projection diagram, the graphic storage device stores data in each projection diagram. The control device has a storage unit that independently stores the magnification of the X-axis and the Y-axis, and the control device simultaneously displays on the display screen corresponding to the enlargement or reduction of the projection drawing that is the target of drawing or the area of the projection drawing. changing the contents of the storage unit that stores the magnification in the X-axis direction or the Y-axis direction of another projection view to be displayed, and displaying the projection view according to the magnification.
It is a drafting method in CAD.

[Effect]

According to the present invention, since the drafting method in CAD is configured as described above, the technical means operates as follows. The controller is operative to store data for each input projection in the graphics storage device. The control device also operates to read the stored data and display each projection on the display screen of the display device. Next, when the area to be enlarged (or reduced) of the projection drawing to be drawn is specified, the control device works to enlarge (or reduce) this projection drawing to the specified area, and also operates to enlarge (or reduce) this projection drawing to the specified area. The X-axis direction or Y direction of other projection views that are displayed at the same time corresponding to
It works to change the contents of the storage section that stores the axial magnification. Further, the control device displays a projection view that is reduced (or enlarged) in one direction at a peripheral position corresponding to the enlarged (or reduced) projection view according to the changed magnification of the storage unit. work. Therefore, the problems of the prior art can be solved.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of a drafting method in CAD according to the present invention. The same reference numerals as in FIG. 8 indicate identical components. 2
Reference numeral 4 denotes a projection drawing control device provided to control a projection drawing control step 42 (FIG. 2), which will be described later, which is a characteristic part of the present invention. Enlarging and arranging the projected view, and reducing and arranging the simultaneously displayed projection view. Reference numeral 28 denotes projection view storage units 27 ₁ to 27 _o that store the first projection view to the nth projection view, respectively.
It is a graphic storage device having a. Projection map storage unit 27
₁ to 27 _o are projection drawing area storage units 21 ₁ to 21 _o and projection figure data storage units 23 ₁ to 23 , respectively.
_o , X-axis direction display magnification storage section 25 ₁ to 25 _o , Y
It is composed of axial display magnification storage units 26 ₁ to 26 _o . X-axis direction display magnification storage units 25 ₁ to 25 _o ,
The Y-axis direction display magnification storage units 26 ₁ to 26 _o are characteristic portions of the present invention, and each independently stores the X-axis direction display magnification and the Y-axis direction display magnification.

FIG. 2 shows an example of the figure input processing procedure of the present invention, in which steps 30 to 32 are the same steps as in FIG. 9, but a projection view control step 42 is provided after the projection view outline setting step 30. There is. After the projection view is set through the projection view setting step 30, the projection view control step 4
In step 2, the projection drawing control device 24 enlarges and arranges the projection drawing to be drawn and arranges and reduces other projection drawings. FIG. 3 shows an example of changes in the projection view control stage 42. The graphic input process will be described below with reference to FIGS. 1 to 3.

First, the point position input device 17 specifies a projection view to be drawn via the projection view control device 24 (step 43). For example, as shown in FIG. 3a, a point 46 in the front view is designated. That is, for the point information x, y input by the point position input device 17, the i-th projection map is determined by the projection map control device 24 according to equation (1). Next, the point position input device 17 specifies the region of the projection view to be drawn via the projection view control device 24 (step 44). For example, the third
As shown in figures a and b, point 47 is designated. That is, the input point information x, y is transmitted to the projection view control device 2.
4 is stored in the projection view area storage unit 21 _i of the i-th projection view storage unit 27 _i . Further, the magnifications ⁱ _x and ⁱ _y in the X-axis direction and the X-axis direction are created by the projection view control device 24 using the following equation (5) for the original magnifications f ⁱ _x and f ⁱ _y .

ⁱ _x =f ⁱ _x ×L ⁱ _x /l ⁱ _x ⁱ _y =f ⁱ _y ×L ⁱ _y /l ⁱ _y …(5) However, l ⁱ _x , l ⁱ _y : x-axis of the original projection area Length in the direction and y-axis direction L ⁱ _x , L ⁱ _y : Length in the x-axis direction and y-axis direction of the enlarged projection view area These axial magnifications ⁱ _x , ⁱ _y are the projection view control device 2
4, respectively, the X-axis direction display magnification storage section 2
5 _i , stored in the Y-axis direction display magnification storage unit 26 _i .

Next, the projection view control device 24 automatically reduces and arranges other projection views (step 4).
5). That is, the top view 48 in FIG. 3b is stored in the projection area storage unit 21 _i of the projection view storage unit ₂₇ i corresponding to the top view 48 with the point 49 as the origin,
Regarding the magnification, use formula (5) in the same way as for the front view.
is created in the X-axis and Y-axis direction display magnification storage section 2.
5 _i and 26 _i . Similarly, the origin and magnification are changed for yet another projection view. In FIG. 3, the right side view 50 is modified to obtain the final view of the projection control stage 42, FIG. 3c.

Although the operation of displaying on the display device 14 is not specifically explained in the projection view control step 42 above,
The projection view control device 24 according to this embodiment creates a signal indicating a line or specified point indicating an area of the projection view as necessary at the time when data is stored in the graphic storage device 28, and controls the display storage device 15. Via the display device 14
This is what is displayed on the display screen.

Note that the projection diagram input stage 31 and the projection diagram display stage 3
2, the following equation (2)′ x=(x−T ⁱ _x )/ ⁱ _x y=(y−T ⁱ _y )/ ⁱ _y …(2)′ is used instead of equation (2) The following equation (3)′ is used instead of (3).

x゜=x×f ⁱ _x +T ⁱ _x y゜=y×f ⁱ _y +T ⁱ _y …(3)′ Figure 4 shows the graphic display screen and projection view when the CAD drafting method according to the present invention is applied. FIG. In the figure, the front view 6 is placed in the center as a drafting object and is displayed enlarged, and the top view 7 is displayed with the magnification in the Y-axis direction reduced to 3/4. Further, the right side view 8 is displayed with the magnification in the X-axis direction reduced to 2/3.

The drafting method in CAD of the present invention will be explained through the drafting process of an object having the shape shown in FIG. 6th
The figure is a diagram showing changes in the figure display screen depending on each drafting process. In the figure, 9 is a top view, 10 is a front view, 11 is a right side view, and 12 and 13 are auxiliary lines. Further, each number in parentheses shown on the left and bottom of the graphic display screen indicates the magnification in the X-axis direction and Y-axis direction of each projection view.

First, the basic shape of the top view 9 is drawn in FIG. 6a. Next, as shown in FIG. 6b, the magnification in the Y-axis direction of the top view 9 is reduced from 1.75 to 0.6, and
An auxiliary line 12 corresponding to the basic shape 9 is generated. In FIG. 6c, the basic shape of the front view 10 is drawn along the auxiliary line 12. Next, as shown in FIG. 6d, the magnification in the X-axis direction of the top view 9 and front view 10 is reduced from 1.75 to 0.5, and auxiliary lines 13 corresponding to the top view 9 and front view 10 are generated. . According to this auxiliary line 13, a right side view 11 shown in FIG. 6e is drawn. As described above, the enlargement and reduction are performed to obtain a final view with equal directional magnification in which the magnification in the X-axis direction and the Y-axis direction of each projection view is 1, as shown in FIG. 6f. In addition,
The X-axis direction and Y-axis direction, which change as each projection view is enlarged or reduced, are placed at appropriate positions such as the top and bottom right of the display screen.
The axial magnification is displayed.

〔Effect of the invention〕

As described above in detail, according to the present invention,
By changing the magnification in each direction of the projection drawings independently and making it easier to see the dimensional correspondence between the projection drawings, we can expect the effect of shortening the drafting time for large parts and equipment. Furthermore, not only 3-sided drawings but also 6-sided drawings are possible, and it is also applicable to drawing general three-dimensional structures.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a drafting method in CAD according to the present invention, FIG. 2 is a diagram showing an example of a flowchart of a figure input processing procedure according to the present invention, and FIG. 3 is an example of the embodiment of FIG. 1. FIG. 4 is a diagram showing an example of a figure display screen when the present invention is applied. FIGS. 7 is a diagram showing a conventional figure display screen, FIG. 8 is a block diagram showing a conventional drawing device, and FIG. 9 is a flowchart of a conventional figure input processing procedure. . 14...Display device, 15...Display storage device, 1
6...Keyboard, 17...Point position input device, 1
8... Graphic input/output control device, 21 ₁ to 21 _o ...
Projection diagram area storage unit, 23 ₁ to 23 _o ... Projection diagram figure data storage unit, 24... Projection diagram control device, 25
₁ to 25 _o ...X-axis direction display magnification storage section, 26 ₁
26 _{o to 26 o} ...Y-axis direction display magnification storage section, 27 ₁ to 27 _o ... projection diagram storage section, 28... graphic storage device.

Claims (1)

[Claims] 1. A display device that displays a plurality of projection views, a graphic storage device that stores data corresponding to each projection view displayed on the display device, and a graphic storage device that stores input data in the graphic storage device and that displays the display device. In a CAD drawing method in which a drawing is created by repeatedly enlarging and reducing each projection, the figure storage device independently controls the X-axis and Y-axis magnification of each projection. The control device has a storage unit for storing information in the X-axis direction or the direction of another projection view simultaneously displayed on the display screen in response to enlargement or reduction of the projection view to be drafted or the area of the projection view. A drafting method in CAD, characterized in that the contents of the storage unit that stores a magnification in the Y-axis direction are changed, and the projected view is displayed according to the magnification.