JPH06243217A - Graphic generating device - Google Patents

Abstract

PURPOSE:To improve the plotting accuracy and efficiency by displaying all solutions, i.e., graphics that satisfy the graphic designating conditions and selecting these graphics for plotting. CONSTITUTION:When the graphic designating conditions are inputted for generation of circles touching the straight lies (a), (b) and (c) respectively, the data on all graphics that satisfy the conditions are calculated and generated by an operation processing means. Then all graphics C1, C2, C3 and C4 that satisfy the graphic designating conditions are shown on a display means based on the generated graphic data. Then a desired circle C2, for example, is picked up (4th pick P4) and therefore only the circle C2 is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic forming apparatus using a computer.

[0002]

2. Description of the Related Art Conventionally, a figure forming apparatus using a computer is a CAD (COMPUTER AIDED DESI).
GN), which is often used for drawing and other designs. Creation of a graphic by a computer is performed by designating various drawing modes such as a straight line, a circle, a curve, and a standard graphic. These various drawing modes are specified by an instruction from a coordinate input device called a keyboard or mouse.In the specified drawing mode, the graphic created by inputting the graphic specification conditions from the keyboard or mouse is displayed on the display unit. Displayed or printed by the printer.

For example, a case of drawing a circle with a mouse will be described as an example. To draw a circle, as the shape specification condition,
There are radius, diameter, 3 points, etc., and each of these graphic figure designating conditions is displayed as a menu on the display unit, the position of the mouse on the display unit is moved to specify one of the graphic designating condition menus. Then draw a circle. The size and position of the circle are determined by the positional information input from the mouse or keyboard and the graphic designation conditions such as numerical values.

[0004]

However, in the above-described conventional figure forming apparatus, only one solution, in other words, one-dimensional drawing can be performed for a certain one figure designating condition. I had to anticipate a lot of graphic designating conditions. For example, as shown in FIG. 7, three straight lines a, b, and c are drawn on the display unit of the computer, and these three straight lines a, b, and c are set as the graphic designation conditions.
Assuming that a circle tangent to is drawn, the first pick P1, the second pick P2, and the third pick P3 are applied to the straight lines a, b, and c, as indicated by the X mark.

When the input of the graphic designating condition is completed in this way, as shown in FIG. 8, only the circle C1 contacting the positions of the first pick P1, the second pick P2 and the third pick P3 is drawn. However, in addition to the circle C1, there are circles C2, C3, and C4 as indicated by the chain double-dashed line as circles that meet the graphic designation condition of being in contact with the straight lines a, b, and c. Straight lines a, b,
In order to draw these circles C2, C3, and C4, which are solutions to the figure designating condition of a circle tangent to c, the circles (C1, C
2, a pick corresponding to C3) had to be applied. As described above, in the conventional graphic drawing apparatus, since only one solution to the graphic designating condition, that is, one-dimensional drawing can be performed as described above, a graphic satisfying the graphic designating condition may be overlooked, which is efficient and accurate. It was not possible to perform such a drawing.

An object of the present invention is to display all solutions, that is, graphics, which satisfy the graphic designation condition, and to select and draw from all the graphics which satisfy the graphic designation condition.
The aim is to improve the accuracy and efficiency of drawing.

[0007]

According to the present invention, there is provided a figure creating apparatus for creating and displaying figure data according to input information such as drawing mode designation information, numerical information and figure designation conditions of various figures to be created. The processing means for calculating and creating the graphic data of all the graphics satisfying the graphic designating conditions of the graphic to be displayed, and the graphic data of all the graphics satisfying the graphic designating conditions created by this computing processing means are all displayed as the graphics. Display means, graphic selecting means for selectively designating any of all the graphics satisfying the graphic designating condition displayed on the display means, and displaying only the graphic selectively designated by the graphic selecting means on the display means. And a control means.

[0008]

According to the present invention, the figure data of all the figures that satisfy the inputted figure designating condition are created and displayed, and any one of the figures can be selected, and the figure satisfying the selected figure designating condition is displayed. To do.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a main part of a figure creating apparatus A according to the embodiment, and FIG. 2 is a flow chart showing the operation of the embodiment. 3 to 6 are explanatory views showing the drawing according to the present invention. A mouse or keyboard (not shown) is connected to the input unit 1, and designation information for designating various plotting modes such as straight lines, circles, curves, and standard graphics, graphics designating conditions for plotting, and input information such as numerical values are input to the mouse. Or from the keyboard. The input information input from the input unit 1 is sent to the display unit 3 and the arithmetic processing unit 4 via the control unit 2. Storage unit 5
Stores input information from the input unit 1, standard graphic data, various component graphic data, graphic processing data such as graphic operation formulas, and system programs.

The system program is a basic program for controlling the input unit 1, the control unit 2, the display unit 3, the arithmetic processing unit 4, and the storage unit 5, and a graphic processing for calculating a graphic by performing a graphic designating condition and the like. Have programs etc. Control unit 2
Controls the graphic drawing device A by this system program. When the control unit 2 executes the graphic processing program of the system program stored in the storage unit 5 according to the input information from the input unit 1, the graphic creating apparatus A enters the graphic processing mode, and various kinds of information are input according to the input information from the input unit 1. Figure processing. For example, in various drawing modes such as straight line, circle, curve, standard figure, and other figure creation modes, when a figure designating condition for figure creation is input to the input section 1 from the mouse or keyboard, the control section 2 inputs the figure designating condition. Information display unit 5
And display it in the calculation processing section 4.

The arithmetic processing unit 4 performs an arithmetic operation with reference to the graphic processing data stored in the storage unit 5 based on the graphic designation condition, and the created graphic data is displayed on the display unit 3 by the control unit 2. It Next, the operation of the present invention will be described with reference to the drawings. As shown in FIG. 3, a straight line a,
b and c are displayed, and when drawing a circle tangent to the straight lines a, b and c, the first pick P1 and the second pick P as indicated by an X mark by the mouse as input of the figure designating condition.
2. The third pick P3 is applied to the straight lines a, b and c (step S1).

Picks (P
The graphic designating conditions (1, P2, P3) are sent to the arithmetic processing unit 4 by the control unit 4, and the process proceeds to step S2. Step S2
Then, the arithmetic processing unit 4, as shown in FIG.
In addition to the circle C1 corresponding to the positions of (P2, P3), a straight line a,
Graphic data of all circles C2, C3, and C4 in contact with b and c are created. The specific calculation contents are as follows. For example, a circle in XY coordinates has three point coordinates (X,
Y), the XY coordinates of all three points in contact with the three straight lines (a, b, c) in the equation of the straight lines a, b, c and the equation of the circle will be obtained. In step S3, the graphic data of each circle (C1, C2, C3, C4) satisfying the graphic designation condition created by the arithmetic processing unit 4 is displayed on the display unit 3 by the control unit 4. When the desired circle among all the circles (C1, C2, C3, C4) satisfying the figure designation condition is set as the circle C2, the fourth pick P4 is applied to the circle 2 by the mouse as shown in FIG. As shown in 6, only the circle C2 tangent to the straight lines a, b and c is selected and displayed (step S4).

As described above, according to the present invention, all solutions satisfying the graphic designating condition of circles tangent to the straight lines a, b, c, in other words, all circles satisfying the graphic designating condition (C1, C2,
C3, C4) can be calculated and displayed, and any one of them can be selected and designated for plotting.

As described above in detail, according to the present invention,
All solutions that satisfy the figure specification conditions, in other words, all figures that meet the figure specification conditions, can be displayed by selecting from all the figures that satisfy the figure specification conditions. Can be achieved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part of a graphic creating apparatus A according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment.

FIG. 3 is an explanatory view showing a drawing according to the embodiment.

FIG. 4 is an explanatory view showing a drawing according to the embodiment.

FIG. 5 is an explanatory diagram showing a drawing according to the embodiment.

FIG. 6 is an explanatory diagram showing a drawing according to the embodiment.

FIG. 7 is an explanatory diagram showing a conventional drawing process.

FIG. 8 is an explanatory diagram showing a conventional drawing process.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Input part, 2 ... Control part, 3 ... Display part, 4 ... Arithmetic processing part, 5 ... Storage part, a, b, c ... Straight line, C1, C2, C
3, C4 ... Yen, P4 ... 4th pick.

Claims (1)

[Claims] 1. A graphic creation device for creating and displaying graphic data according to input information such as drawing mode designating information, numerical information, and graphic designating conditions of various graphics to be created. Calculation processing means for calculating and creating the figure data of all the figures to be satisfied, and display means for displaying all the figure data of all the figures satisfying the figure designation conditions created by the operation processing means as figures
A figure selecting means for selecting and designating any of all the figures satisfying the figure designating condition displayed on the display means, and a control means for displaying only the figure selectively designated by the figure selecting means on the display means. A graphic creation device characterized by having.