JPH0855231A - Plotting processor - Google Patents

Abstract

PURPOSE:To draw a figure with high precision through easy operation without the need for input operation for a plotting point as to all pixels on a display screen and to speedily calculate sizes and angles regarding the drawn figure as to the plotting processor of electronic equipment etc., equipped with a figure plotting and display function. CONSTITUTION:A grid pattern consisting of plural points in grid arrangement stored in a ROM 13 is displayed at a liquid crystal display part 16 and the point which is closest in the grid pattern to the input position of a touch pen on the display screen of a tablet 18 is selected as an input point, and the figure is plotted based on the selected input point on the display screen and size and angle data regarding the plotted figure are calculated based on the array points of the grid pattern.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing processing device in an electronic device or the like having a graphic drawing display function.

[0002]

2. Description of the Related Art Conventionally, electronic devices such as personal computers equipped with a graphic drawing function have been put into practical use. In this figure drawing function, for example, when a plurality of points on the display screen are input by operating a touch pen or the like and a figure drawing instruction is given, a figure connecting each of the plurality of touch input points as a drawing point is drawn and displayed. It

In this case, the drawing point on the display screen is
All the pixels on the display screen are input.
Therefore, when calculating the dimension or angle of a certain side in the drawn figure, arithmetic processing is executed with the positions and numbers of all pixels between the drawing points as the target as calculation elements.

[0004]

However, in the above-mentioned conventional graphic drawing function, in all of the graphic drawing processing based on the specification of the drawing point and the calculation processing of the dimensions and angles for the drawn graphic. Since the drawing process or the calculation process is performed in pixel units on the display screen, the amount of data handled in each process is very large, and a highly accurate graphic can be drawn by a simple drawing point specifying operation. However, there is a problem in that the CPU and the like are in a high load state because it takes time and effort to calculate the dimensions and angles.

The present invention has been made in view of the above problems, and it is possible to draw a highly accurate graphic with a simple operation without the need to perform an input operation of a drawing point for all pixels on the display screen. It is an object of the present invention to provide a drawing processing device that enables the above-described drawing and can quickly calculate and calculate the dimensions and angles of the drawn figure.

[0006]

That is, a first drawing processing apparatus according to the present invention comprises a grid display means for displaying a grid pattern composed of a plurality of points arranged in a grid pattern on the display screen, and the display screen. The tablet input means for touching the upper part for input and the touch input position on the display screen by the tablet input means, the closest point among the plurality of points displayed by the grid display means is selected. Input point selecting means for selecting as an input point, graphic drawing means for drawing a graphic based on the input point on the display screen selected by the input point selecting means, and size of the graphic drawn by the graphic drawing means And a figure data calculation means for calculating numerical data relating to the sheath shape based on the array points of the grid pattern.

Further, the second drawing processing apparatus according to the present invention has a grid display means for displaying a grid pattern consisting of a plurality of points arranged in a grid on the display screen, and a grid displayed by the grid display means. Pattern 1
Grid pattern setting means for selectively switching and setting the width per grid, tablet input means for touching and inputting on the display screen, and touch input position on the display screen by the tablet input means, Based on the input point selecting means for selecting the closest point among the plurality of points displayed by the grid displaying means as an input point, and the input point on the display screen selected by the input point selecting means The graphic drawing means for drawing a graphic and the graphic data calculating means for calculating numerical data concerning the size and shape of the graphic drawn by the graphic drawing means are calculated based on the array points of the grid pattern.

A third drawing processing apparatus according to the present invention is a grid display means for displaying a grid pattern composed of a plurality of points arranged in a grid on a display screen, and a grid displayed by the grid display means. Pattern 1
Grid pattern setting means for selectively switching and setting the width per grid, grid spacing designating means for arbitrarily designating a conversion value per grid of the grid pattern displayed by the grid display means, and the display screen The tablet input means for touching the upper part for input and the touch input position on the display screen by the tablet input means, the closest point among the plurality of points displayed by the grid display means is selected. Input point selecting means for selecting as an input point, graphic drawing means for drawing a graphic based on the input point on the display screen selected by the input point selecting means, and size of the graphic drawn by the graphic drawing means Numerical data relating to the sheath shape is applied to the grid pattern array points and one grid point designated by the grid spacing designating means. It is constructed by a graphic data calculation means for calculating, based on the converted value.

[0009]

That is, in the first drawing processing apparatus, the point closest to the touch input position on the display screen by the tablet input means is the input point which is the closest point among the plurality of points displayed by the grid display means. And a graphic is drawn based on the selected input point on the display screen,
And the dimension and angle data about the drawn figure are
Since it is calculated based on the array points of the grid pattern displayed by the grid display means, it is possible to perform the input operation of the drawing points targeting the array points displayed in the grid, and to calculate the number of the grid array points. The calculation processing can be performed as.

In the second drawing processing apparatus, the width per grid of the grid pattern displayed by the grid display means in the first drawing processing apparatus is selectively set. The grid pattern can be switched and set according to the shape of the figure to be drawn, input operation of drawing points targeting the grid-displayed array points can be performed, and arithmetic processing can be performed using the number of grid array points as a calculation element. You will be able to do it.

Further, in the third drawing processing apparatus, in the first drawing processing apparatus, the width per grid of the grid pattern displayed by the grid display means is selectively set. Moreover, since the conversion value per one grid is arbitrarily designated, the grid pattern is switched and set according to the shape of the figure to be drawn, and the input operation of the drawing point for the array point displayed in the grid is performed. In addition to being able to perform, the arithmetic processing can be performed using the number of grid array points and the designated conversion value between the array points as a calculation element.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an electronic circuit of a graphic drawing processing apparatus. This graphic drawing processing device is provided with a CPU 1.
1 is provided.

The CPU 11 activates a system program stored in advance in the ROM 13 in accordance with a key operation signal from the key input unit 12 to execute operation control of each circuit section. The CPU 11 includes the key input unit 1
In addition to the RAM 2 and the ROM 13, the RAM 14 is connected, and the liquid crystal display unit 16 is connected via the display drive circuit 15.

Further, a tablet 18 which is arranged on the display screen of the liquid crystal display unit 16 in an overlapping manner is connected to the CPU 11 via a tablet drive circuit 17. Here, the tablet 18 detects the touch input position by the touch pen operation on the display screen of the liquid crystal display unit 16 and outputs the input position detection signal from the tablet drive circuit 17 to the CPU 11. In the CPU 11,
The coordinates on the display screen corresponding to the touch input position are calculated according to the input position detection signal obtained from the tablet drive circuit 17, and the determination process and the display process of the input content are executed.

The key input unit 12 includes the CPU 11
"Mode" key 12 which is operated when switching the operation mode in, the cursor key 12b which is operated when selecting the display data on the liquid crystal display unit 16 and the cursor operation, and when operating the numerical input Numeric keypad 12c, a "setting" key 12d operated when setting the pattern of the grid pattern displayed on the liquid crystal display 16 in the setting state of the geometrical function mode for drawing graphics, and when stopping the operation in each mode The "end" key 12e and the like operated by the user are provided.

Here, the grid pattern is composed of a plurality of points which are arranged and displayed in a grid pattern on the display screen. The grid pattern has a width per grid, that is, one grid interval. Those having different distances of large, medium, and small are stored in advance in the ROM 13 as bitmap data as three pattern data.

The three grid patterns are
The cursor key "↑" 12b is selectively switched and displayed according to the operation, and the "setting" key 12d is operated to selectively set.

The calculation conversion value for one grid of the grid pattern selected in response to the operation of the cursor key "↑" 12b is arbitrarily designated by the ten key 12c. Value is "3"
In such a case, the conversion value of the inter-grid intervals in the grid pattern on the display screen is calculated as “3”.

The ROM 13 stores in advance a system program that controls the entire graphic drawing processing apparatus and subprograms such as the geometrical function mode processing corresponding to each operation mode. Three display grid pattern data having different widths in three stages are stored in advance.

FIG. 2 shows the RA in the graphic drawing processing apparatus.
It is a figure which shows the register structure in M14. That is, in the RAM 14, the display data to be displayed on the liquid crystal display unit 16 is written as bitmap data, and the display register 14a functions as a frame memory, and the menu icon in the setting state of the geometrical function mode for drawing graphics. The menu selection data indicating the figure menu selected by specifying is "Line""1","Scale"
Menu grid 14b stored as "2", "triangle""3","protractor""4", three grids selectively set according to the operation of the cursor keys "↑" 12b and "setting" key 12d The pattern selection data indicating one of the patterns is
The setting grid register 14c stored as "small""1","medium""2","large""3", and the inter-grid conversion value designated by the ten key 12c when the grid pattern is selectively set. Grid spacing register 1
4d etc. are provided.

Then, in the liquid crystal display section 16, in the setting state of the geometrical function mode, the width of one grid indicated by the setting grid register 14c in the RAM 14 is "small", "medium" or "large". The grid pattern is read out from the ROM 13 and displayed, and at the same time, the graphic data input by the touch pen on the displayed grid pattern and the calculation result data such as the size and angle of the graphic are displayed.

Next, the operation of the graphic drawing processing device having the above-mentioned configuration will be described. FIG. 3 is a flow chart showing the geometrical function mode processing in the graphic drawing processing apparatus.

That is, when the CPU 11 is set to the geometric function mode by operating the "mode" key 12a in the key input unit 12, one grid of "small" among the three grid patterns stored in the ROM 13 in advance. The grid pattern corresponding to is read out, developed in the display register 14a in the RAM 14, and displayed on the liquid crystal display unit 16 via the display drive circuit 15 (step S1).

When the cursor key "↑" 12b in the key input unit 12 is operated, three grid patterns "small", which are stored in the ROM 13 in advance,
“Medium” and “Large” are sequentially read out and are switched and displayed on the liquid crystal display unit 16. For example, in the state where a desired grid pattern is displayed according to the size and shape of the figure that the user wants to draw, the numeric keypad is used. Specify the conversion value for calculation per grid by operating 12c, and press the "Set" key 12
When d is operated, the pattern selection data indicating the grid pattern which is selectively displayed is stored in the set grid register 14c in the RAM 14, and the designated inter-grid conversion value is stored in the grid interval register 14d (step S2 → S3, S4 → S5, S6 → S
7).

Then, the setting grid register 14c
Various menu icons for drawing graphics are displayed on the liquid crystal display unit 16 together with the grid pattern corresponding to the pattern selection data stored in (step S8).

Here, it is determined that one of the menu icons displayed on the liquid crystal display unit 16 is designated based on the touch position detection signal supplied from the tablet 18 to the CPU 11 via the tablet drive unit 17 by the touch pen input. When judged, the menu selection data indicating the designated menu is stored in the menu register 1 in the RAM 14.
4b is stored (steps S9 → S10 → S11).

In this way, when the operation position is specified and the touch position detection signal accompanying the touch pen input is further supplied to the CPU 11 and it is judged that the operation is not the specification operation of the menu icon, the menu register 14b. The menu process corresponding to the setting menu designated in step S12 is executed (step S12 → S9 → S10 → S).
A).

FIG. 4 is a flow chart showing the menu processing accompanying the geometrical function mode processing of the graphic drawing processing apparatus. FIG. 5 is a diagram showing an operation display state corresponding to the menu processing "line" of the graphic drawing processing apparatus.

FIG. 6 is a diagram showing an operation display state corresponding to the menu processing "scale" of the graphic drawing processing apparatus. FIG. 7 is a diagram showing an operation display state corresponding to the menu processing "triangle" of the graphic drawing processing apparatus.

FIG. 8 is a view showing an operation display state corresponding to the menu processing "protractor" of the graphic drawing processing apparatus.
FIG. 9 is a diagram showing a specific example of the figure length calculation accompanying the menu processing "scale" of the figure drawing processing apparatus.

FIG. 10 is a diagram showing a concrete example of the calculation of the graphic angle associated with the menu processing "protractor" of the graphic drawing processing apparatus. That is, in the geometrical function mode processing in FIG. 3, a desired grid pattern is set and displayed,
In the state where the converted value between 1 grids is specified, FIG.
As shown in (A), when the icon menu “line” X1 displayed on the liquid crystal display unit 16 together with the set grid pattern is designated by the touch pen P, menu selection data “1” indicating the icon menu “line” is displayed. Is stored in the menu register 14b (step S9 →
S10, S11).

In this way, with the operation line "line" specified, the line pattern to be drawn is first drawn by the touch pen P according to the grid pattern displayed on the liquid crystal display unit 16 as shown in FIG. 5B. When the drawing point that is the starting point of is specified, the menu process corresponding to the setting menu "line" is activated (steps S9 → S10 → S).
A).

Then, in the menu processing shown in FIG. 4, the setting menu "line" designated by the menu register 14b in the RAM 14 is judged, and the line is closest to the input position of the touch pen P designated as the starting point of the line figure. The grid is selected as the first drawing point, the selected grid is displayed as points, and the name "A" as the first drawing point is additionally displayed (step A).
1 → A2, A3, A4).

Here, it is judged whether or not two points, which are a start point and an end point for drawing the line figure, are set. In this case, only the first drawing point A is set, so 2 It is determined that one point has not been set, and the input by the touch pen P is awaited (steps A5 → S9).

Then, as shown by the arrow a in FIG. 5B, when the drawing point which is the end point of the line figure to be drawn is specified by the touch pen P, the setting menu "Line" is again displayed.
The menu processing corresponding to is activated, the grid closest to the input position of the touch pen P designated as the end point of the line figure is selected as the second drawing point, and the selected grid is displayed as points and The name "B" as a drawing point is additionally displayed (step S9).
→ S10 → SA “A1 → A2, A3, A4”).

When the first and second drawing points A and B for drawing the line figure are set in this way, FIG.
As shown in, the line figure L connecting the two points A and B
Is drawn and displayed (steps A5 → A6).

In this case, since the line figure L is drawn based on the drawing points A and B set corresponding to the grid pattern on the display screen, the drawing point of the line figure L desired to be drawn can be easily determined. A desired line graphic L can be drawn by a simple process according to the position information of each corresponding grid.

Then, the line figure L based on the grid pattern displayed on the display screen is drawn and displayed, and again,
In the state of waiting for input by the touch pen P, in order to obtain the length of the line figure L, as shown in FIG. 6 (A), the icon menu “scale” X2 displayed on the liquid crystal display unit 16 together with the line figure L. Is designated by the touch pen P, menu selection data “2” indicating the icon menu “scale” is stored in the menu register 14b (steps S9 → S10, S11).

In this way, when the operation menu "scale" is designated, one end A of the line figure L drawn according to the grid pattern of the liquid crystal display unit 16 is designated by the touch pen P as shown in FIG. 6B. The menu processing corresponding to the setting menu “scale” is activated (steps S9 → S10 → SA).

Then, in the menu processing in FIG. 4, the setting menu "scale" designated in the menu register 14b in the RAM 14 is judged, and the touch pen P designated as one end A of the line figure L whose length is to be measured. The grid closest to the input position of is selected as the first measurement point (steps A1 → A7).

Here, it is judged whether or not two points, one end and the other end, for measuring the length of the line figure L are set. In this case, only the first measurement point A is still set. Since it has not been set, it is determined that the two points have not been set, and the input by the touch pen P is awaited (steps A8 → S9).

Then, as shown by the arrow b in FIG. 6B, when the other end B of the line figure L is designated as the measurement point by the touch pen P, the menu process corresponding to the setting menu "scale" is activated again. And the line figure L
The grid closest to the input position of the touch pen P designated as the other end of is selected as the second measurement point B (steps S9 → S10 → SA “A1 → A7”).

In this way, when the first and second measurement points A and B for measuring the length of the line figure L are set,
Based on the number of grids forming the measurement points A and B, the length between the two points is calculated, and
As shown in (C), the measured line figure L is displayed in a blinking manner, and the calculated length of the line figure L (for example, “AB = 7.2”) is displayed (step A8 → A
9, A10).

That is, as shown in FIG. 9, for example, when the length of the line figure L in which the number of grids in the horizontal direction X is "3" and the number of grids in the vertical direction Y is "4" is measured, The grid numbers “3” and “4” are used as the calculation elements as they are,
It is calculated and displayed as "L = 5" according to the arithmetic expression of "L ² = 3 ² +4 ^2. "

When the grid-to-grid conversion value set in the grid interval register 14c in the RAM 14 is designated as "2", for example, "2", it is regarded as "2" per grid. Since it is converted, it is calculated and displayed as “L = 10” according to the arithmetic expression of “L ² = (3 × 2) ² + (4 × 2) ² ”.

In this case, since the length of the line figure L is measured based on the respective measurement points A and B set corresponding to the grid pattern on the display screen, the arithmetic expression "L ² = X
^The calculation element to be substituted for “ ² + Y ² ” can be given as the number of grids, and the length of the line figure L can be quickly calculated and displayed by a simple numerical calculation process.

Further, in the length measuring process of the line figure L, the converted value for one grid is arbitrarily designated by the grid interval register 14d, so that the length of the grid unit is changed to the actual length. It can also be obtained as a corresponding measurement result.

On the other hand, in the geometrical function mode processing shown in FIG. 3, a desired grid pattern is set and displayed,
In the state where the converted value between 1 grids is specified, FIG.
As shown in (A), when the icon menu “triangle” X3 displayed on the liquid crystal display unit 16 together with the set grid pattern is designated by the touch pen P, menu selection data “3” indicating the icon menu “triangle” is displayed. Is stored in the menu register 14b (steps S9 → S10, S11).

In this manner, with the operation menu "triangle" specified, the touch pen P first draws the triangle to be drawn in accordance with the grid pattern displayed on the liquid crystal display unit 16, as shown in FIG. 7B. When the drawing point to be the first point is designated, the menu process corresponding to the setting menu "triangle" is activated (steps S9 → S1).
0 → SA).

Then, in the menu processing shown in FIG. 4, the setting menu "triangle" designated by the menu register 14b in the RAM 14 is judged, and the touch pen P is designated as the first point of the triangle. The closest grid is selected as the first drawing point,
The selection grid is displayed as points, and the name “A” as the first drawing point is additionally displayed (steps A1 → A11, A12, A13).

Here, it is judged whether or not three points for drawing a triangle are set. In this case, since only the first drawing point A has been set yet, it is judged that three points are not set. Touch pen P
Waiting for input by (step A14 → S
9).

Then, as shown by the arrow c in FIG. 7B, when the drawing point which is the second point of the triangle to be drawn is specified by the touch pen P, the menu processing corresponding to the setting menu "triangle" is executed again. The grid that is activated and is closest to the input position of the touch pen P designated as the second point of the triangle is selected as the second drawing point,
The selection grid is displayed as points, and the name “B” as the second drawing point is additionally displayed (steps S9 → S10 → SA “A1 → A11, A12, A1.
3 ”).

Further, as shown by the arrow d in FIG. 7B, when the drawing point which is the third point of the triangle to be drawn is specified by the touch pen P, the menu processing corresponding to the setting menu "triangle" is executed again. The grid that is activated and is closest to the input position of the touch pen P designated as the third point of the triangle is selected as the third drawing point,
The selection grid is displayed as points, and the name “C” as the third drawing point is additionally displayed (steps S9 → S10 → SA “A1 → A11, A12, A1.
3 ”).

When the first to third drawing points A, B and C for drawing the triangle are set in this way, FIG.
As shown in (C), a triangle T connecting the three points A, B, and C as vertices is drawn and displayed (step A).
14 → A15).

In this case, since the triangle T is drawn based on the drawing points A, B and C set corresponding to the grid pattern on the display screen, the drawing point of the triangle T to be drawn can be easily determined, A desired triangle T can be drawn by a simple process according to the position information of each corresponding grid.

Then, the triangle T based on the grid pattern displayed on the display screen is drawn and displayed, and again,
In order to obtain the angle of the second vertex B of the triangle T in the state of waiting for the input with the touch pen P, as shown in FIG.
As shown in (A), when the icon menu "protractor" X4 displayed on the liquid crystal display unit 16 is designated by the touch pen P, the menu selection data "4" indicating the icon menu "protractor" is stored in the menu register 14b. (Steps S9 → S10, S11).

In this way, with the operation menu "protractor" specified, as shown in FIG.
When the first point A of the triangle T drawn according to the grid pattern of No. 6 is designated by the touch pen P, the menu processing corresponding to the setting menu “protractor” is activated (steps S9 → S10 → SA).

Then, in the menu processing in FIG. 4, the setting menu "protractor" specified in the menu register 14b in the RAM 14 is judged, and the touch pen specified as the first point A of the triangular vertex B whose angle is to be measured. The grid closest to the P input position is selected as the first measurement point A (steps A1 → A16).

Here, it is determined whether or not three points for measuring the angle (angle ABC) of the triangular vertex B are set. In this case, the first measurement point A
Since only the points have been set, it is determined that the three points have not been set, and the touch pen P waits for input (steps A17 → S9).

Then, as shown by the arrow e in FIG. 8B, when the second point B of the triangle T is designated as the measurement point by the touch pen P, the menu processing corresponding to the setting menu "protractor" is activated again. And the triangle T
The grid closest to the input position of the touch pen P designated as the measured vertex B of B is selected as the second measurement point B (steps S9 → S10 → SA “A1 → A1”).
6 ”).

Further, when the third point C of the triangle T is designated as the measurement point by the touch pen P as shown by the arrow f in FIG. 8B, the menu processing corresponding to the setting menu "protractor" is activated again. And the triangle T
The grid closest to the input position of the touch pen P designated as the third point C is selected as the third measurement point B (steps S9 → S10 → SA “A1 → A1”).
6 ”).

In this way, when the first to third measurement points A, B and C for measuring the angle of the triangular vertex B are set, based on the number of grids forming the measurement points A, B and C. , The internal angle of the vertex B is calculated, and as shown in FIG. 8C, the measured triangular vertex B
An angle mark is displayed at the inner angle of the vertex and the calculated inner angle of the vertex B (for example, “angle ABC = 35.5 °”)
Is displayed (steps A17 → A18, A19).

That is, as shown in FIG. 10, for example, one line segment AB and the other line segment B forming the triangular vertex B.
When the number of grids in the horizontal direction X of each C is “3” and the number of grids in the vertical direction Y of each line segment AB and BC is “4” and “2”, the number of each grid is “2”. , “3”, “4” are used as the calculation elements as they are, and “angle ABC = 19.4” is calculated according to the arithmetic expression “angle ABC = tan ⁻¹ (4/3) −tan ⁻¹ (2/3)”. Is displayed.

In this case, the angle of the triangular vertex B is measured based on the respective measurement points A, B and C set corresponding to the grid pattern on the display screen, and therefore the arithmetic expression "angle ABC = tan ^-1". (Y1 / X) -tan- ¹ (Y2 /
X) ”can be given as a calculation element to be substituted for the number of grids, and the angle of the triangular vertex B can be quickly calculated and displayed by a simple numerical calculation process.

Therefore, according to the graphic drawing processing apparatus having the above-described structure, the liquid crystal display unit 16 displays the grid pattern consisting of a plurality of points of the grid array stored in the ROM 13 in advance, and the touch pen on the display screen by the tablet 18 is displayed. To the input position of, select the closest point in the grid pattern as the input point, draw a figure based on the selected input point on the display screen, and then measure the size and angle of the drawn figure. Since the data is calculated based on the array points of the grid pattern, the drawing points can be easily input and operated for the grid-displayed array points, and the number of grid array points is used as a calculation element for quick calculation processing. be able to.

Further, since the width per grid of the grid pattern displayed on the liquid crystal display unit 16 can be switched by selecting the kind of the grid pattern previously stored in the ROM 13 with the cursor 12b, the figure to be drawn can be selected. The grid pattern can be switched and set according to the shape.

Further, since the converted value per grid of the grid pattern displayed on the liquid crystal display section 16 is arbitrarily designated by the ten-key 12c, the number of grid array points and the number of grid array points are measured when the dimension of a drawing figure is measured. By using the designated conversion value between the array points as a calculation element, it is possible to perform arithmetic processing according to the actual size, for example.

In the above embodiment, the menu of "protractor" is specified based on the triangle T drawn according to the grid pattern in accordance with the menu processing of "triangle".
The case of measuring the inner angle of the triangular vertex B of the triangle T has been described. However, even when the desired three points A, B, and C are simply input with the touch pen according to the grid pattern and the inner angle of the vertex B is measured, It may be performed by the same “protractor” menu processing as described above.

[0069]

As described above, according to the first drawing processing apparatus of the present invention, a plurality of points displayed by the grid display means are displayed with respect to the touch input position on the display screen by the tablet input means. The closest point among them is selected as an input point, a figure is drawn based on the selected input point on the display screen, and dimensions and angle data relating to the drawn figure are displayed by the grid display means. Since it is calculated based on the array points of the displayed grid pattern, it is possible to perform the input operation of the drawing points that target the array points displayed in the grid, and to perform the arithmetic processing using the number of the grid array points as the calculation element. Become so.

Further, according to the second drawing processing apparatus of the present invention, in the first drawing processing apparatus, the width per grid of the grid pattern displayed by the grid display means is selectively selected. Since it is switched and set, the grid pattern is switched and set according to the shape of the figure you want to draw,
It is possible to perform an input operation of a drawing point for the grid-displayed array points, and to perform an arithmetic process using the number of grid array points as a calculation element.

Further, according to the third drawing processing apparatus of the present invention, in the first drawing processing apparatus, the width per grid of the grid pattern displayed by the grid display means is selectively selected. The grid pattern is switched and set, and since the conversion value per one grid is arbitrarily designated, the grid pattern is switched and set according to the shape of the figure to be drawn,
It is possible to perform an input operation of a drawing point for the grid-displayed array points, and to perform an arithmetic process using the number of grid array points and a designated conversion value between the array points as a calculation element.

Therefore, according to the present invention, it is possible to draw a highly accurate graphic with a simple operation without inputting drawing points for all pixels on the display screen. When the dimensions and angles of the drawn figure are calculated, by using the grid as a base, the calculation process is simplified and the calculation can be performed quickly.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an electronic circuit of a graphic drawing processing apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a register configuration in a RAM in the graphic drawing processing apparatus.

FIG. 3 is a flowchart showing a geometrical function mode process in the graphic drawing processing device.

FIG. 4 is a flowchart showing menu processing associated with geometrical function mode processing of the graphic drawing processing apparatus.

FIG. 5 is a diagram showing an operation display state corresponding to menu processing “line” of the graphic drawing processing apparatus.

FIG. 6 is a diagram showing an operation display state corresponding to menu processing “scale” of the graphic drawing processing apparatus.

FIG. 7 is a diagram showing an operation display state corresponding to a menu process “triangle” of the graphic drawing processing device.

FIG. 8 is a diagram showing an operation display state corresponding to a menu processing “protractor” of the graphic drawing processing apparatus.

FIG. 9 is a diagram showing a specific example of figure length calculation associated with menu processing “scale” of the figure drawing processing apparatus.

FIG. 10 is a diagram showing a specific example of calculating a graphic angle associated with a menu processing “protractor” of the graphic drawing processing apparatus.

[Explanation of symbols]

11 ... CPU, 12 ... Key input section, 12a ... "Mode"
Key, 12b ... Cursor key, 12c ... Numeric keypad, 12
d ... "Setting" key, 12e ... "End" key, 13 ... R
OM, 14 ... RAM, 14a ... Display register, 14b ...
Menu register, 14c ... Setting grid register, 1
4d ... Grid spacing register, 15 ... Display drive circuit, 1
6 ... Liquid crystal display part, 17 ... Tablet drive circuit, 18 ... Tablet, P ... Touch pen, X1 ... "Line" menu icon, X2 ... "Scale" menu icon, X3 ...
"Triangle" menu icon, X4 ... "Protractor" menu icon.

Claims (3)

[Claims] 1. A grid display means for displaying a grid pattern composed of a plurality of points arranged in a grid on a display screen, a tablet input means for touching and inputting on the display screen, and the tablet input means. An input point selecting means for selecting, as an input point, a point closest to the touch input position on the display screen among the plurality of points displayed by the grid displaying means, and selecting by the input point selecting means. Graphic drawing means for drawing a graphic based on the input points on the display screen, and graphic data for calculating numerical data on the size and shape of the graphic drawn by the graphic drawing means based on the arrangement points of the grid pattern A drawing processing apparatus comprising: a calculating unit. 2. A grid display means for displaying a grid pattern composed of a plurality of points arranged in a grid on a display screen, and a width per grid of the grid pattern displayed by the grid display means is selectively switched. Grid pattern setting means for setting, tablet input means for touching and inputting on the display screen, and touch input positions on the display screen by the tablet input means, which are displayed by the grid display means. An input point selecting means for selecting the closest point among a plurality of points as an input point; a graphic drawing means for drawing a graphic based on the input point on the display screen selected by the input point selecting means; Numerical data regarding the size and shape of the figure drawn by the figure drawing means is calculated based on the array points of the grid pattern. Drawing processing apparatus comprising: the graphic data calculating means, by comprising the that. 3. A grid display means for displaying a grid pattern composed of a plurality of points arranged in a grid on a display screen, and a width per grid of the grid pattern displayed by the grid display means selectively. Grid pattern setting means for switching and setting, grid interval designating means for arbitrarily designating a conversion value per grid of the grid pattern displayed by the grid display means, and a tablet for inputting by touching on the display screen. Input means and input point selecting means for selecting, as an input point, a point closest to the touch input position on the display screen by the tablet input means, among the plurality of points displayed by the grid display means. And a graphic drawing for drawing a graphic based on the input point on the display screen selected by the input point selecting means. Figure data calculation for calculating numerical data relating to the size and shape of the figure drawn by the figure drawing means based on the array points of the grid pattern and the conversion value per grid specified by the grid interval specifying means. And a drawing processing device.