JPH0315924A - 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:The designated position of a first cursor device 6 on a digitizer 4 and the position of one point on the screen of a display device designated with the first cursor device 6 are the same on the digitizer 4. When an operator designates two points on the digitizer 4 by the first cursor device 6 he in the case of drawing a straight line, the straight line 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 on the digitizer 4 is moved in parallel to the deseired position and the graphic is drawn on the digitizer 4 with the right-angled scale line as reference by operating the second cursor device 54 for control. Thus, the 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
Regarding the drawing coordinate input device used in D. [Prior Art] As a drawing coordinate input device for CAD, a combination of a tablet-type digitizer and an absolute type cursor device such as a stylus pen, light pen, or free cursor is generally used. The coordinate signals of each point above are supplied from the digitizer to the control device, and based on the coordinate signals, the control device is configured to control the CRT display device and display a figure on the display. Furthermore, as an input device for a word processor, 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, as shown in Japanese Patent Laid-Open No. 58-144287. be. Further, Japanese Patent Publication No. 62-59329 discloses an input device for a word processor in which a tablet (digitizer) is superimposed on the bottom surface of a liquid crystal display.

[Problem that the invention seeks to solve]

If the display device and digitizer are configured separately, when drawing a straight line, the straight line will not be drawn at the indicated location, 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. A straight line is drawn. Therefore, it is not possible to draw a drawing in the same way as drawing a straight line drawing using a writing instrument on paper on a drawing board. If you are not used to CAD input operations, you will feel uncomfortable with 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 flexible parallel ruler, move the head parallelly in any direction on the drawing board, move the right angle scale parallelly on the drawing board, or The orthogonal 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 to solve problems]

(1) In order to achieve the above object, the present invention projects the screen of a display device on a board-like digitizer, and compares the indicated position of a first cursor device on the digitizer with the indicated position on the screen of the display device. In the apparatus, a drawing is drawn on the screen of the display device by inputting a position signal to a control device using the first cursor device, and the screen of the display @ a second cursor device for controlling the orthogonal scale line provided separately from the first cursor device; A scale parallel movement control means for moving the scale line in parallel on the screen is provided.

(2) In order to achieve the above object, the present invention projects the screen of a display device on a board-like digitizer, and compares the indicated position of a first cursor device on the digitizer with the indicated position on the screen of the display device. The apparatus 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 cursor device, and inputting a position signal to the control device using the first cursor device. means for displaying a rectangular scale line; a second cursor device for controlling the rectangular scale line provided separately from the first cursor device; and a coordinate signal based on the output signal of the second cursor device to control the rectangular scale Scale translation control means for moving the line parallel on the screen; and scale rotation control means for rotating the orthogonal scale line on the screen using a coordinate signal based on the output signal of the second cursor device. It is.

[Effect]

(1) In the above configuration, the position indicated by the first 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 operates a second cursor device for controlling the orthogonal scale line on the digitizer to translate it to a desired position, and uses this orthogonal scale line as a reference. It can be drawn on a digitizer.

(2) In the above configuration, the position indicated by the first 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, You can draw on the digitizer using the scale line as a reference. [Embodiments] The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

In FIG. 7, 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 the same dimensions as a normal drawing board,
It has a flat surface like a drawing board. The digitizer 4 is operated by an operator using an absolute cursor device 6 such as a stylus pen, which is connected to a control device (not shown) of the digitizer 4 via a cord.
When one point above is specified, the absolute coordinate signal of the specified point is converted into paper surface coordinate data via the driver 8 and coordinate conversion means 10 shown in FIG. 3, and is supplied to the cursor pattern generator 12. The paper coordinates are the actual data plane coordinates that serve as the reference for the drawing program. The cursor pattern generator 12 supplies cursor pattern data to the coordinate conversion means 14. The coordinate conversion means 14 converts the input cursor pattern data into screen coordinate data and supplies this to the display driver l7, so that the cursor 15 corresponding to the indicated position on the digitizer 4 of the cursor device 6 is positioned on the screen of the display device. The cursor 15 (see FIG. 5) is displayed on the screen 16 (see FIG. 3) via the projector 50. The position coordinate data of the cursor device 6 is
By bringing the tip of the force input device 6 into contact with the digitizer 4 and hitting it, it is supplied to the drawing program means 18, which means that the cursor device 6 has been programmed in advance.
Outputs plotting data based on the plotting command position signal specified from the command menu. This drawing data is
The coordinate conversion means 20 converts the data into screen coordinate data and supplies the data to the display driver 16, so that a figure based on the drawing program is displayed on the screen 16. The above drawing commands are executed in the command menu area 4a of the digitizer 4.
It can be called by instructing (see FIG. 7). The screen 16 is set to have substantially the same dimensions as the digitizer 4, and is disposed close to the back surface of the digitizer 4. In Figure 4, 22 is green (G
This is a display device consisting of a cathode ray tube for use in televisions (reen), and a lens 24, a light valve 26, and a polarizing prism 28 are disposed in front of the display surface of the display device. The light valve 26 constitutes 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.
Since it is disclosed in detail in Publication No. 1, Publication No. 4343535, etc., detailed explanation thereof will be omitted. The light valve 26 interacts with the input from the xenon lamp 30 to convert the image on the display V&

The image illuminated on 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 (Rθd)
This is a display device made from a cathode ray tube, in which a lens 38 and a light bulb 40 are disposed in front of the display surface, and the light bulb 40 faces the polarizing prism 28.

42 is a display device consisting of a cathode ray tube for blue, and a lens 44 is installed in front of the display surface of this display device.
, a reflecting mirror 46 and a light bulb 48 are arranged, and the light bulb 48 faces the polarizing prism 28.

Said lens 24.38, 44, light valve 26.38
．． 48, lamp 30, polarizing prism 28, half mirror 3
2 and the reflective mirror 46 are display devices [22, 36
．． A reflection type enlargement projection mechanism (projector) 50 is configured to enlarge and project the image of the display surface of 42 onto the screen 16, and the enlargement ratio of the enlargement projection mechanism 50 is equal to that of the digitizer 4.
The position indicated by the upper cursor device 6 is set to match the position of the cursor 15 on the screen l6 based on the coordinate signal of the position. The screen 16 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 the host CP.
It is connected to a certain control device 52 from U. 54 is an incremental type cursor device consisting of a mouse, that is, a type that outputs the amount of movement, and is a control device! Driver 5 in 52
It is connected to 6. The driver 56 has switch contact a
, b to the coordinate conversion means 58 and the length change/angle change amount conversion means 60. The contact points a and b are configured to be switched by operating a switch key of the cursor device 54. The cursor pattern generator 62 displays a rectangular scale line 64 with a scale shown in FIG. has been done. 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 includes a rectangular scale line 64.
The intersection point, that is, the position coordinates of the origin, the angle, the X-axis length of the line shape, y
Various data such as axis length and scale width are stored.

Next, the operation of this embodiment will be explained. screen l6
The rectangular scale #I64 displayed can be operated by the cursor device 54. When no key on the cursor device 54 is pressed, the switch 70 is
It will be connected to the contact point. In this state, when the cursor device 54 is moved in the X and Y directions on the digitizer 4 or other table plane, as shown in FIG. It is converted into a parallel movement of the origin position of @64 and displayed. When the mouse key of the cursor device 54 is pressed, the switch 70 connects to the b contact. When the cursor device 54 is moved in the XY direction on the table plane while pressing the mouse key, the conversion means 60 collects the amount of change in length of the cursor device 54, Δy or ΔX, and this amount of change Δy or ΔX is It is linearly converted into an angle Δθ by the function f(Δy). 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 generates a rectangular scale line 6 as shown in FIG.
4 is rotated by an angle θ and displayed on the screen 16. The angle θ of this rectangular scale, Ii 64, is displayed on the screen 16 by the drawing program means 18. On the other hand, the operator points the command area 4a on the digitizer 4 with the tip of the cursor device 6, and sends, for example, a green straight line command to the drawing program means 18 of the control device 52.
digitizer 4 at the tip of the cursor device 6.
When the upper two points A and B are specified, the drawing coordinate signals of the two points A and B are input to the drawing program means 18. Control device 52
creates drawing data based on input coordinate signals, converts this drawing data into screen coordinate data by the coordinate conversion means 20, and controls the display device 22 based on the data. As a result, a straight line AB is displayed on the screen of the display device W22 with the XY coordinate axes (screen position III) of the image plane as a reference. The image on the display surface of the display device 22 is projected in the direction of 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 at a ratio of 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 82
A green straight line connecting the points is displayed in real time on the digitizer 4 in actual size.6 The above is a case of displaying a green straight line, but using the same principle, red, blue, etc. straight lines, circles, or points can be displayed. etc., can be drawn at a designated position on the digitizer 4. The input data of the control device 52 is stored in a processing device of the control device 52, and is configured to be outputted to an XY plotter. Drawing with the cursor device 6 is performed with reference to the orthogonal scale line 64 on the screen 16. This right angle scale I! Reference numeral 64 corresponds to a right angle scale, that is, a pair of straight rulers provided on the head of the 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 is
The cursor parameter table 66, the length variation/angle variation conversion means 60, and the cursor pattern generator 62 constitute means for displaying the orthogonal scale line on the screen of the display device.
It has control means for parallel translation and rotation on 6. 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. The incremental coordinate signal of the cursor device 54 is supplied to the scale state table change management means 92 through the a contact point of the switch 70 (see FIG. 4). 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 displayed on the right angle scale line 64 via the screen of the display device and the projector 50.
is displayed on the screen 16. 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 line 6
4 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. 2, the switch detection means 80 corresponds to the switch 70 in FIG.
, and the scale state table change management means 92
This corresponds to the length change amount/angle change amount conversion means 60 in the figure. The angle rounding means 88 is configured for a newly added minimum unit angle rounding function and an index function not shown in FIG. The data is rounded by degrees and output to the scale status table change management means 92.
For example, in the angle conversion mode, the angle rounding means 88 rounds the output of the angle conversion means 86 into minimum units and outputs the rounded output. For example, the minimum unit of angle is 0.5
If the angle conversion means 86 outputs 0 degrees to 5 degrees, the angle rounding means 88 receives the signal from the angle conversion means 86 and outputs 0.0, 0.5, 1.0, l. ．． 5,
2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5
．． Outputs 0 and angle signal. Also, cursor device 5
When the index switch 4 is pressed, in response to this index event signal, the angle rounding means 88 converts to the index angle rounding mode, and the angle converting means 86
The output from is rounded to increments of 15 degrees and outputs angle values in increments of 15 degrees. That is, when the angle output value of the angle converting means 86 changes from 0 to 30... and this angle output is input to the angle converting means 86, the angle rounding means 88
receives the signal from the angle converting means 86 and converts the O. 0,
15.0,30. O. ......and outputs the index angle signal. 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, and the means 80 outputs a trigger signal that activates the angle conversion means 86 and the y-coordinate recording means 82. do. Among the xY coordinate outputs of the cursor device 54 when the mouse key is turned on, the coordinate output of the Y-axis component is supplied to the y-coordinate recording means 82 and the angle conversion means 86.

The Y-axis partial coordinate output is written into the y-coordinate table 83. The angle conversion means 86 collects the amount of change in the Y-axis partial coordinate output from the table 83, and converts this amount of change 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 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 state 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. This rewritten right angle scale 64
The angle data is read out to the right-angle scale line display memory 94, and the contents of the memory 94 are displayed on the screen of the display device and also on the screen 6 via the projector 50. When the angle rounding means is converted to the index angle mode, the angle conversion means 86
The angle output is rounded to an index angle and supplied to the scale state table change management means 92.

On the other hand, the index angle conversion mode event signal is supplied from the angle conversion means 86 to the scale state 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 index output angle signal of the angle rounding means 88.

The rewritten angle data of the rectangular scale 64 is
The contents of the memory 94 are read out to the rectangular scale line display memory 94 and displayed on the screen of the display device as well as on the screen 16 via the projector 50. As a result, as the cursor device 54 moves, the angle of the orthogonal scale line 64 changes every 15 degrees.

〔effect〕

As described above, the present invention provides one of the two cursor devices.
One cursor device moves and rotates the orthogonal scale line, and the other cursor device specifies the coordinate position, so you can draw on the screen as if you were using the head of a flexible parallel ruler device and a writing instrument. Moreover, since the orthogonal scale line can be easily aligned with the index angle, there are advantages such as good operability.

[Brief explanation of drawings]

Fig. 1 is a block explanatory diagram, Fig. 2 is a block explanatory diagram, Fig. 3 is a block explanatory diagram, Fig. 4 is an explanatory diagram, Fig. 5 is an explanatory diagram, Fig. 6 is a block explanatory diagram, and Fig. 7 is an explanatory diagram of the block. An external view, FIG. 8 is an explanatory view, and FIG. 9 is an explanatory view. 2... Drafting table, 4... Digitizer, 6... Cursor device, 14... Cursor, 16... Screen, 22... Display device, 24... Lens, 26... Light Bulb, 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, 52... - Control device, 54... Cursor device, 64... Right angle scale.

Claims (1)

[Scope of Claims] (1) The screen of a display device is projected on a board-like digitizer, and the indicated position of the first cursor device on the digitizer and the indicated position on the screen of the display device match on the digitizer. In the apparatus, the drawing is performed on the screen of the display device by inputting a position signal to the control device using the first cursor device, wherein a right-angled scale line is displayed on the screen of the display device. means, a second cursor device for orthogonal scale line control provided separately from the first cursor device, and a coordinate signal based on an output signal of the second cursor device to move the orthogonal scale line on the screen. 1. An input device for CAD, comprising a scale parallel movement control means for moving the scale in parallel. (2) 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 by inputting a position signal to the control device by means of a first cursor device;
The device for drawing on the screen of the display device includes means for displaying orthogonal scale lines on the screen of the display device, and a second cursor device provided separately from the first cursor device for controlling the orthogonal scale lines. a cursor device; scale translation control means for moving the orthogonal scale line in parallel on the screen using a coordinate signal based on an output signal of the second cursor device; and a coordinate signal based on the output signal of the second cursor device. and scale rotation control means for rotating the orthogonal scale line on the screen. (3) The input device for CAD according to items 1 and 2, wherein the first cursor device is an absolute type cursor device such as a stylus pen that indicates an absolute position on the digitizer. (4) The CAD according to items 1 and 2, wherein the second cursor device is an incremental cursor device such as a mouse that outputs an electrical signal corresponding to the amount of movement in the XY-axis directions. input device. (5) The scale parallel movement control means includes a scale state table that stores position data of the orthogonal scale line, and a scale state table change that rewrites the position data of the scale state table based on the output of the second cursor device. 2. The CAD input device according to claim 1 and claim 2, wherein the CAD input device comprises a management means. (6) The scale rotation control means includes: an angle conversion means for converting a coordinate signal in one axis direction of the second cursor device into an angle signal; a scale state table storing angle data of the orthogonal scale line; 3. The CAD input device according to claim 2, further comprising scale state table change management means for rewriting the angle data in the scale state table based on the angle signal. (7) Set the angle data of the scale status table to 1
CAD according to item 6, characterized in that an angle rounding means is provided for rewriting every index angle such as 5 degrees.
input device.