JPH0315930A - Cad input device - Google Patents

Abstract

PURPOSE:To draw a graphic on a screen with the sense of handling the head of a free parallel rule device and writing tools by allowing one cursor device to move and rotate a right-angled scale line and allowing the other cursor device to designate a coordinate position. CONSTITUTION:When an operator designates two points on a digitizer by a first cursor device in the case of drawing a straight line, the straight having two points on both ends is displayed on the digitizer 4 on a real time basis. At the time of drawing the graphic on the digitizer 4, the right-angled scale line 64 on the digitizer 4 is moved in parallel to a deseired position, rotated by a deseired angle to draw the graphic on the digitizer 4 with the right-angled scale line as a reference by operating a second control cursor device 54. When the first cursor device 6 designates the straight line or two points on the digitizer 4, the right-angled scale line 64 is in parallel to the straight line or the straight line connecting two points. Thus, an operation can be executed with the sense of handling the free parallel rule.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a computer-aided design and drafting system, or CA
This relates to a drawing coordinate input device used in D.

[Conventional technology]

A common CAD drawing coordinate input device is a combination of a tablet-type digitizer and a cursor device such as a stylus pen, light pen, or free cursor sensor, and the coordinates of each point on the digitizer indicated by the cursor device are Signals are supplied from the digitizer to a control device, and based on the coordinate signals, the control device is configured to control a CRT display device and display graphics on the display. In addition, as an input device for a word processor, Japanese Patent Application Laid-Open No. 58-1442
As shown in No. 87, a device in which a transparent plate-like coordinate input tablet board (digitizer) is superimposed on the display surface of a flat display device is known.
Publication No. 59329 discloses an input device for a word processor in which a tablet (digitizer) is superimposed on the bottom surface of a liquid crystal display. [Problems to be solved by the invention] The display device and the digitizer are separate units. If configured, when drawing a straight line, the straight line will not be drawn at the location where both ends of the straight line are indicated, that is, on the digitizer, but will be drawn at a different location from the indicated location, that is, on the screen of the display device. You cannot draw a drawing as if you were drawing a straight line using a writing instrument on a piece of paper on a board, so if you are not used to CAD input operations, you will feel strange about the input operations, and C
The flaw was that AD was difficult to handle. In addition, when drawing on paper on a drawing board using a universal parallel ruler, move the head in parallel on the drawing board in any direction, move the right angle scale on the drawing board, and move the right angle scale on the drawing board. The scale is rotated and drawings are drawn using this orthogonal scale as a reference. Conventional CAD cannot be operated in the same way as using a parallel ruler, and there is a problem in that people who are used to operating parallel rulers may feel strange when operating CAD. The present invention aims to solve the above problems.

Means for Solving Problem C] In order to achieve the above object, the present invention projects the screen of a display device on a board-like digitizer, and the position indicated by a first cursor device on the digitizer and the screen of the display device are The device is configured to draw a drawing on the screen of the display device by inputting a position signal to a control device using the first force-sol device so that the indicated position on the digitizer coincides with the indicated position on the digitizer, means for displaying a rectangular scale line on the screen of the display device; a second cursor device for controlling the rectangular scale line provided separately from the first cursor device; control means for translating and rotating the orthogonal scale line on the screen; and scale secondary base #I setting means for making the orthogonal scale line parallel to two points or a straight line indicated by the first cursor device. It has been established.

[Effect]

In the above configuration, the position indicated by the ↓ cursor device on the digitizer and the position of a point on the screen of the display device indicated by the first cursor device are the same on the digitizer. Therefore, when an operator wants to draw a straight line, for example, by pointing at two points on the digitizer with the first cursor device, a straight line having both ends of these two points is displayed on the digitizer in real time.

When drawing a drawing on the digitizer, the operator manipulates the second cursor device for controlling the orthogonal scale line on the digitizer to translate it to a desired position or rotate it by a desired angle, thereby adjusting the orthogonal scale line on the digitizer. It is possible to draw on the digitizer using the scale line as a reference. Moreover, the first
When you point a straight line or two points on the digitizer with the cursor device, the orthogonal scale line becomes parallel to the straight line or the straight line connecting the two points. [Embodiments] The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

In FIG. 10, reference numeral 2 denotes a drafting table, and a transparent tablet-type digitizer 4 is supported on its support frame. The digitizer 4 is set to have the same dimensions as a normal drawing board, and has a flat surface like a drawing board. The digitizer 4 can be operated by an operator using the digitizer 4 control device (
When a point on the digitizer 4 is indicated with an absolute type cursor device 6 such as a stylus pen (not shown) connected by a cord to the digitizer 4, the absolute coordinate signal of the indicated point is transmitted to the driver 8 and the coordinate conversion means 10 shown in FIG. The data is converted into paper coordinate data and supplied to the cursor pattern generator 12. What are paper coordinates?
These are the actual data plane coordinates that serve as the basis for the drawing program. The cursor pattern generator 12 supplies cursor pattern data to the coordinate conversion means l4. The coordinate conversion means 14 converts the input cursor pattern data into screen coordinate data, and converts the input cursor pattern data into screen coordinate data.
A cursor 15 corresponding to the indicated position on the digitizer 4 of the cursor device 6 is displayed on the screen of the display device, and the cursor 15 (see FIG. 8) is transmitted to the screen 16 (see FIG. 6) via the projector 50. (see). The position coordinate data of the cursor device 6 is transmitted to the drawing program means 18 by bringing the tip of the cursor device 6 into contact with the digitizer 4 and hitting it.
The means 18 outputs drawing data based on a drawing command position signal which the cursor device 6 has previously instructed from the command menu. This drawing data is converted into screen coordinate data by the coordinate conversion means 20 and supplied to the display driver 16, and a figure based on the drawing program is displayed on the screen 16. The above drawing command is executed in the command menu area 4 of the digitizer 4.
It can be called by instructing a (see FIG. 10). The screen l6 is the digitizer 4.
The digitizer 4 has substantially the same dimensions as the digitizer 4, and is disposed close to the back surface of the digitizer 4.

In FIG. 4, 22 is a display device consisting of a green cathode ray tube, and a lens 24, a light valve 26, and a polarizing prism 28 are arranged in front of the display surface of this display device. The light valve 26 is a device that converts an image input from one side into a clear image and irradiates the same to the other side.The structure and principle of the light valve 26 are based on US Pat. No. 3,723,651 and US Pat. No. 4,343.
Since it is disclosed in detail in Japanese Patent No. 535, etc., a detailed explanation thereof will be omitted. The light valve 26 converts the image of the display device 22 into a clear image by interacting with the input from the xenon lamp 30, and illuminates the polarizing prism 28 with this image.

The image irradiated onto the polarizing prism 28 is transmitted to the half mirror 3
2 and a lens 34, the image is enlarged and projected onto the screen 16. 36 is red
This is a display device consisting of a cathode ray tube, and a lens 38 and a light valve 40 are disposed in front of the display surface of the display device, and the light valve 40 faces the polarizing prism 28.

42 is a display device consisting of a cathode ray tube for blue (Blua); a lens 44, a reflecting mirror 46, and a light valve 48 are arranged in front of the display surface of the display device; the light valve 48 is connected to the polarizing prism 28; They are facing each other. The lens 24, 38, 44, the light valve 26
．． 38.48, the lamp 3O, the polarizing prism 28, the half mirror 32 and the reflective mirror 46 are the display device 22
, 36.42 on the screen 16 in an enlarged manner. The position indicated by 6 and the position of the cursor 15 on the screen 16 based on the coordinate signal of the position are set to match. The screen l6 and the enlarged projection mechanism (projector) 50 are housed inside a box of the drafting table 2. The digitizer 4 and display device [22, 36, 42] are connected to a control device 52 from the host CPU.

Reference numeral 54 denotes a cursor device of a certain increment type, that is, a type that outputs a movement amount from the mouse, and is connected to a driver 56 in the control device 52. The driver 56 is connected to a coordinate conversion means 58 and a length change/angle change amount conversion means 60 via switch contacts a and b. The structure is such that switching between the contacts a and b can be performed by operating a switch key of the cursor device 54. The cursor pattern generator 62 displays a rectangular scale fi64 with graduations as shown in FIG. There is. The cursor pattern generator 62 is connected to the display driver 17 via a coordinate conversion means 68. 72 is a keyboard.

The cursor pattern parameter table stores various data such as the position coordinates of the intersection of the orthogonal scale lines 64, that is, the origin, the angle, the X-axis length, the Y-axis length, and the scale width of the line figure.

Next, the operation of this embodiment will be explained.

The rectangular scale displayed on the screen 16, [64]
It can be operated by a cursor device 54.

When no key of the cursor device 54 is pressed, the switch 70 is connected to the a contact. In this state, when the cursor device 54 is moved in the XY direction on the digitizer 4 or other table plane, the amount of change in the output of ΔX and Δy of the cursor device 54 remains unchanged on the right angle scale, as shown in FIG. This is converted into a parallel movement of the origin position of the line 64 and displayed. cursor device 5
When the mouse key No. 4 is pressed, the switch 70 connects to the b contact. When the force-sol device 54 is moved in the XY direction on the table plane while pressing the mouse key, the conversion means 6
0 collects the amount of change in length of Δy or ΔX of the cursor device 54, and this amount of change Δy or ΔX is the function f(Δy
) is linearly converted into an angle Δθ. This angle change amount Δθ is added to the angle θ on the current parameter table 66. According to the contents of the parameter table 66, the cursor pattern generator 62 rotates the orthogonal scale line 64 by an angle θ and displays it on the screen ↓6, as shown in FIG.

The angle θ of this rectangular scale 864 is displayed on the screen 16 by the drawing program means 18. Meanwhile, the operator points the tip of the cursor device 6 to the digitizer 4.
Instruct the upper command area 4a, for example, instruct a green straight line command to the drawing program means l8 of the control device [52, and use the tip of the cursor device 6 to
When points A and B are designated, the plotting coordinate signals of the two points A and B are input to the plotting program means 18. The control device 52 creates drawing data based on the input coordinate signal, converts this drawing data into screen coordinate data by the coordinate conversion means 2o, and displays the display device [22F! - to control. As a result, a straight line AB is displayed on the screen of the display device 22 with the XY coordinate axes (screen coordinates) of the image plane as a reference. Display equipment! The image on the display screen 22 is projected toward the polarizing prism 28 by the light valve 26, and the image on the display device 22 is enlarged and projected onto the screen 16 through the polarizing prism 28, the half mirror 32, and the lens 34. The origin of the XY coordinate reference of this enlarged projection view and the XY coordinate reference of the digitizer 4 match, and the reference points of the lengths of the xY axes match each other with 1=1. Therefore, when the operator indicates points A and B on the digitizer 4 with the cursor device 6, the indicated points A and 8
A green straight line connecting the two points is displayed in real time in actual size on the digitizer 4. The above is a case of displaying a green straight line, but using the same principle, it is also possible to draw red, blue, etc. straight lines, circles, points, etc. at designated positions on the digitizer 4. The input data of the control device 52 is stored in the processing device of the control device 52. It is configured to be able to output to an XY plotter. The above cursor device 6
The drawing is on a rectangular scale Is! on the screen 16.
64. This right-angled scale line 64 corresponds to a right-angled scale, that is, a pair of straight rulers provided on the head of a universal parallel ruler device, and the cursor device 6 corresponds to a writing instrument. The operator uses the cursor device 54 to translate and convert the angle of the orthogonal scale line 64 in the same way as operating the head of a universal parallel ruler device, and uses the other cursor device 6 to perform drawing operations. As is clear from the above description, the cursor pattern generator 62
constitutes a means for displaying the orthogonal scale line on the screen of the display device; This constitutes a control means for parallel translation and rotation. In this embodiment, the screen of the display device is projected onto the screen 16 by the enlarged projection mechanism 50, but a display device having a screen of the same size as the digitizer 4 may be placed below the digitizer 4. ．．
Next, the parallel movement function of the orthogonal scale line will be explained in more detail with reference to FIG. Carsonore device 54
The incremental coordinate signal is supplied to the scale state table change management means 92 through the a contact point of the switch 70 (see FIG. 7). The management means 92 sequentially rewrites the origin coordinates of the orthogonal scale line 64 in the scale state table 84 corresponding to the cursor parameter table 66 shown in FIG. 3 in response to changes in the coordinate signals of the cursor device 54. The contents of this scale state table 84 are read out to the scale display memory 94, and the orthogonal scale line 64 is displayed on the screen 16 via the screen of the display device and the projector 50. The origin or center point of the orthogonal scale line 64 is rewritten according to changes in the output of the cursor device 54, so that the orthogonal scale #I 64 moves in parallel on the screen 16.

Next, the rotation control function of the orthogonal scale line will be explained in more detail with reference to FIG.

In FIG. 5, the switch detection means 81 corresponds to the switch 70 in FIG.
, the y-coordinate recording means 82, and the scale state table change management means 92 correspond to the length change amount/angle change amount conversion means 60 shown in FIG. Additionally, the angle rounding means 88
6 is a configuration for a newly added minimum unit angle rounding function, which is not shown in FIG. Output.

For example, if the minimum unit of angle is 0.5 degrees, when the angle conversion means 86 outputs 0 to 5 degrees, the angle rounding means 88 receives a signal from the angle conversion means 86 and... O
．． O, 0.5, 1.0, 1.5, 2.0, 2.5, 3.
It outputs angle signals of 0, 3.5, 4.0, 4.5, 5.0. When the angle conversion mouse key of the cursor device 54 is turned on, this key signal is detected by the switch detection means 80, which detects the angle conversion means 86, y
A trigger signal is output to activate the coordinate recording means 82. Among the XY coordinate outputs of the cursor device 54 when the mouse key is turned on, the Y-axis component coordinate output is supplied to the y-coordinate recording means 82 and the angle conversion means 86 . The Y-axis component coordinate output is written to the y-coordinate table 83. The angle conversion means 86 collects the amount of change in the Y-axis component coordinate output from the table 83. This amount of change is converted into an angular amount. The angle signal output from the angle conversion means 86 is input to the angle rounding means 88, where it is rounded to the minimum unit of angle and supplied to the scale state table change management means 92. On the other hand, an event signal of the normal angle conversion mode of angle conversion is supplied from the angle conversion means 86 to the scale status table change management means 92. The scale state table change management means 92 rewrites the angle data in the scale state table 84 based on the output angle signal of the angle rounding means 88. The rewritten angular data of the rectangular scale 64 is read out to the rectangular scale line display memory 94, and the contents of the memory 94 are displayed on the screen of the display device as well as on the screen 16 via the projector 50. Ru.

Next, the scale secondary baseline setting means will be explained in detail with reference to FIGS. 1 to 3. The operator hits the scale secondary baseline command from the command area 4a with the cursor device 6, and then uses the cursor device 6 to select the direct ML or 2
When the vicinity of points A and B is hit, the position of this straight line L or the coordinates of the vicinity of points A and B are input to the coordinate search means 98. The means 98 performs a direct search in the database 100 from the above-mentioned position or neighboring coordinates of the 82 points A and A. Select L or two points A and B, read the data of this, and store it in the database 100.
The coordinates of the two points, the starting point and the ending point, or the coordinates of the two points A and B of the straight line L stored in are input to the angle calculating means 96. The means 96 calculates the angle θ of the straight line L or the line connecting the two points A and B from the coordinate data of the two points, and supplies this angle to the scale state table change management means 92. The means 92 rewrites the angle data in the scale state table 84. As a result, the rectangular scale 11A64 on the digitizer 4 is tilted at an angle θ and is parallel to the straight line L or the line connecting the two points A and B, as shown in FIGS. 2 and 3.

〔effect〕

As described above, the present invention uses one of the two cursor devices to move and rotate the orthogonal scale line, and the other cursor device to indicate the coordinate position, so that the head of the universal parallel ruler device can be moved and rotated. You can draw on the screen as if you were using a writing instrument.In addition, we added a scale secondary baseline function that allows you to make the right-angle scale line parallel to a desired straight line or two points, so you can use the right-angle scale. This has the advantage that drawing operations based on lines can be performed easily and efficiently.

[Brief explanation of the drawing]

Fig. 1 is a block explanatory diagram, Fig. 2 is an explanatory diagram, Fig. 3 is an explanatory diagram, Fig. 4 is a block explanatory diagram, Fig. 5 is a block explanatory diagram, Fig. 6 is a block explanatory diagram, and Fig. 7 is an explanatory diagram. 8 is an explanatory diagram, FIG. 9 is an explanatory block diagram, FIG. 10 is an external view, the first upper diagram is an explanatory diagram, and FIG. 12 is an explanatory diagram. 2... Drafting table. 4... Digitizer, 6... Cursor device, 14... Cursor, Machine 6... Screen, 22... Display device, 24... Lens, 26... Light valve, 28... Polarizing prism.
30...xenon lamp, 32...half mirror,
34... Lens, 36... Display device, 38
... Lens, 40 light valve, 42 ... Display device, 44 ... Lens, 46 ... Reflection mirror,
48...Light valve, 50...Enlargement projection mechanism, 5
2... Control device, 54... Cursor device, 64
...Right angle scale. Fig. 2 Fig. 3 Fig. 8 Fig. 9 Fig. 11

Claims (2)

[Claims] (1) Project the screen of the display device on a board-shaped digitizer so that the indicated position on the digitizer of the first cursor device and the indicated position on the screen of the display device match on the digitizer, and In the apparatus for drawing on the screen of the display device by inputting a position signal to a control device using a first cursor device, means for displaying a rectangular scale line on the screen of the display device; a second cursor device for controlling the orthogonal scale line provided separately from the cursor device; a control means for translating and rotating the orthogonal scale line on the screen by an output signal of the second cursor device; 1. A CAD input device comprising scale secondary baseline setting means for making the orthogonal scale line parallel to two points or a straight line indicated by a cursor device. (2) The scale secondary baseline setting means determines the corresponding two-dimensional scale based on the scale state table storing the angle of the orthogonal scale line and the coordinates indicated by the first cursor device.
Coordinate retrieval means for retrieving point or straight line data from a database; angle calculation means for calculating the angle of a line or straight line connecting the two points from two points or straight lines output from the coordinate retrieval means; and the angle calculation means. 1. A scale state table change management means for rewriting the angle of the orthogonal scale line in the scale state table to an angle parallel to the straight line based on the angle value output from the scale state table. CAD input device.