JPH04188285A - Graphic processor - Google Patents

Abstract

PURPOSE:To reduce the operations of a user by automatically preparing line segments necessary for expressing a solid. CONSTITUTION:When the user instructs the solidification of a graphic from an input device 1, a solidifying signal detection part 7 detects the signal through an input control part 6 and transmits it to a central operation processing part 8. Continuously, the instruction is transmitted from the central operation processing part 8 to a graphic data copy part 10, and the line segments necessary for solidification are calculated based on a displacement amount stored in a displacement amount storage part 5 so as to prepare a data. The prepared data is stored in a graphic data storage part 12. When the data is entirely stored, the data stored in the graphic data storage part 12 is converted to a video data on a video memory 13, and it is displayed through a display control part 14 to a display device 15. Thus, the user can easily prepare the graphic visually having stereoscopic features only by instructing the solidification to the arbitrary plane graphic.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to desktop publishing (DTP) that automatically creates and displays auxiliary lines to make a figure look three-dimensional in drawing processing such as single figure editing. , CAD, word processors, and other graphic processing devices.

[Conventional technology]

In a conventional graphic processing device, when creating a three-dimensional pie chart as shown in FIG. 9, for example, a basic shape as shown in FIG. 10 is created for each element composing the pie chart. Then I had to fill in each side.

[Problem to be solved by the invention]

However, when expressing a thick figure using such a device, it is necessary to create auxiliary line segments to give a three-dimensional effect based on the user's subjective sense.

For example, in order to create a three-dimensional figure as shown in Figure 10, the line segments 20°21.22,2
I have to create 3.

This is difficult unless the user has a three-dimensional image in advance.

Furthermore, it is generally difficult to align the starting points and ending points of the line segments 20, 21, and 22 with the corners of the fan shape, or to determine the position of the line segment 23.

Furthermore, when changing the composition ratio (%) of the three-dimensional pie chart created by − degrees, the user has to repeat the above-mentioned operations again, resulting in a great deal of trouble.

This invention was made in view of the above problems,
The purpose is to automatically create line segments that are essential for three-dimensional expression, thereby reducing user operations.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a key input means, a coordinate input means, a display means, a means for storing a plurality of figure data, and an arithmetic processing means, and the figure displayed by the display means A graphic processing device equipped with a graphic processing function for editing data is provided with a three-dimensional representation means for three-dimensionally expressing an arbitrary target graphic.

The three-dimensional representation means includes an instruction means for instructing three-dimensional representation of a figure, and a means for moving an arbitrary figure displayed by the display means in parallel based on instructions by the means, and displaying the trajectory as a line segment. It is a good idea to have the following.

Furthermore, it is desirable to provide a means for holding and expressing a transparent or non-transparent attribute for a geometrically closed figure, and an indicating means for indicating the attribute.

[For production]

According to the graphic processing device according to the present invention, any target graphic can be expressed three-dimensionally, so that the user's operations are reduced.

〔Example〕

Embodiments of the present invention will be specifically described below with reference to the drawings.

First, the three-dimensional figure described in this example will be briefly explained.

FIG. 4 is a three-dimensional representation of a regular pentagon with thickness. This figure is composed of a figure (pentagon) 11 forming the front side, a figure (pentagon) 12 forming the back side, and line segments 13 to 17 connecting the vertices of each figure.

Note that the figure called a 3D figure for boat fishing has its part hidden and cannot be displayed, but the 3D figure created in this example is a wire that expresses the displayed image as if it were a transparent object.・If you need something like a frame diagram, or if you need a 3D diagram of boat fishing, by giving non-transparent attributes to the surfaces that make up the 3D transparent body created in this example, You can get it easily.

Now, the regular pentagonal three-dimensional figure mentioned above can be expressed relatively easily, but the three-dimensional fan shape shown in Figure 10 is a fan-shaped (174 yen) figure 18 that makes up the front and back sides. .19 and the line segment 20~2 connecting each of those vertices
In addition to 2, there is an auxiliary line segment 2 that expresses the connection of curved surfaces.
3 may be required.

The procedure of this embodiment is to select a target figure from a group of figures already created on one screen, and make that figure the front side of the three-dimensional figure.

Furthermore, by translating and copying the shapes on the screen, we determine the back surface of the 3D figure, and then create line segments that connect the vertices of those shapes, and in some cases, lines that express connections between circular curved parts. Create minutes.

In the series of operations described above, the user performs the steps up to determining the back surface, and the subsequent steps of creating and displaying line segments are performed automatically.

FIG. 1 is a block diagram showing the configuration of a graphic processing device that is an embodiment of the present invention.

This graphic processing device includes an input device 1 consisting of a keyboard, etc.
．． Coordinate input device consisting of a pointing device (mouse) etc. 2. A coordinate detection unit 3 that detects coordinates from the signal of the coordinate input device 2. Displacement amount detection section 4 that detects displacement. Displacement amount storage section 5. Hexagonal control section 6. Three-dimensional signal detection section 7. CPU
A central arithmetic processing unit 8 consisting of etc. A line segment data creation section 92 that creates line segments necessary for three-dimensional expression; a graphics data copy section 10; a graphics attribute change section 112 that gives transparency/non-transparency attributes to graphics; a graphics data storage section 12. Video memory 139 display control section 14. It consists of a display device 15 such as a display.

When a user instructs the three-dimensionalization of a figure through the input device 1, the signal is detected by the three-dimensionalization signal detection section 7 via the input control section 6 and transmitted to the central processing section 8.

The central processing unit 8 executes processing shown in flowcharts in FIGS. 2 and 3, which will be described later.

When a user specifies a target figure and instructs the selected figure to be moved in parallel and copied, the displacement detection unit 4 first detects the amount of displacement between the figures, and calculates the displacement. The amount is stored in the amount storage section 5.

Next, the central processing unit 8 sends an instruction to the graphic data copying unit 10 to add the stored displacement amount to one graphic data and copy it.

The copied data is sent to the graphic data storage section 12 and stored therein.

Next, an instruction is sent from the central processing unit 8 to the figure data copying unit 10, which calculates the line segments necessary for three-dimensionalization based on the displacement stored in the displacement storage unit 5, and creates data. .

The created data is stored in the one-figure data storage section 12.

When all the data is created, the data stored in the graphic data storage section 12 is converted into video data on the video memory 13 and displayed on the display device 15 through the display control section 14.

Furthermore, if a non-transparent three-dimensional figure is desired to be created, when the user instructs the user to do so, the central processing unit 8 sends a signal to the figure attribute change unit 11, calls up the stored figure data, and Change and display attributes.

FIG. 2 is a flowchart showing a main routine according to the present invention performed by the central processing unit 8.

In this routine, a target figure is selected in step 1, but this part remains the same as the conventional technology.

Further, in step 2, the figure selected in step 1 is translated and copied, and the conventional technique of figure movement etc. is used as is for this part as well.

In step 3, the amount of movement of the figure is calculated and stored. This amount of movement is determined by the displacement (ΔX, Δ
Expressed as Y).

In step 4, a line segment connecting the vertices of the specified front and back figures is automatically created. Line segment data requires its starting point and ending point, and these points are determined using the following method.

First, the coordinates of one of the vertices of the figure forming the front surface are set as the starting point of a line segment, and then the coordinates obtained by translating the starting point coordinates by displacement (ΔX, ΔY) are set as the end point of the line segment.

Next, in step 5, it is determined whether or not there are curved portions in the target figure, and if there are curved portions, in step 6, auxiliary line segments that connect the curved portions are created.

In step 7, one created line segment is displayed on the screen.

FIG. 3 is a flowchart showing in detail the process of creating auxiliary line segments connecting curves in step 6 of FIG.

A method for creating the auxiliary line segment 23 of the three-dimensional figure shown in FIG. 10 will be specifically explained along this flowchart.

As a first step, in step 11, the starting point of an auxiliary line segment 23 connecting the curved portions of the front figure and the back figure is calculated. The point is determined using the following method.

First, as shown in FIG. 5, consider a circle 24 whose circumference is the arcuate curve 18a of the target fan-shaped figure 18. Also, the displacements (ΔX, Δ
Y) as the slope (the vertices po, p of each fan shape
Consider the straight line )25 passing through o'.

The starting point of the line segment 23 is perpendicular to the straight line 25 and is located at the center P of the circle 24.
Straight lines 26 and 1 that pass through O(XO, ya) and are determined by the following equation
It is geometrically obvious that it is the intersection point P1 with the circle 24.

Therefore, this point P1 can be easily solved from equations of straight lines and circles. The point calculated by that calculation (2
point exists) as PL (X,, Y,).

Let P2 (X,,Y,).

The two points obtained using the above method have elements that can be the starting points of the actual auxiliary line segment.

In step 12, the two points PL and P obtained in step 11 are
2 is appropriate as the starting point of the auxiliary line segment.

The criterion for determination is that if a point P1 or P2 is a point on the arcuate curve 18a of the fan-shaped figure 18 forming the front surface of the three-dimensional figure, then this point is taken as the starting point of the auxiliary line segment. On the contrary, the arc curve 18a
If it is not above, it is inappropriate as the starting point of the line segment.

Whether point P1 or point P2 is on the arcuate curve 18a is determined as follows.

The starting point of the circular arc curve 18a is Ps (Xs, Ys), and the ending point is P
The angle θ1 from the starting point Ps to the ending point Pe, as seen from the center point Po of the circle described above, is expressed as e (X e v Y e ).

Next, in the same manner, the angle θ2 from the starting point Ps to the one-judgement breaking point (consider Pl as an example) is obtained and compared with this. Here, if the angle θ2 is smaller than the angle θ1, the point P
1 is determined to be on the circular arc curve 18a.

As another example, consider a three-dimensional diagram as shown in FIG.

In the case of this figure, it is determined that the two points P1 and P2 obtained by the above method are not on the circular arc curve 30a of the fan-shaped figure 30 forming the front surface.

In such a case, there is no need to create auxiliary line segments that connect the circular arcs of the fan shape that make up the front and back surfaces. means.

Now, after determining the starting point using the above method, the end point of the line segment is calculated. This is the same as step 4 in FIG.

By carrying out the above steps, each constituent part of a three-dimensional figure as shown in FIG. 10, for example, is created and completed.

Note that for such a geometrically closed figure, the first
If a non-transparent attribute is specified using the input device 1 shown in the figure and the attribute held in the figure attribute changing unit 11 is made non-transparent, the seventh
It is also possible to display an opaque three-dimensional figure as shown in the figure or FIG.

〔Effect of the invention〕

As described above, according to the present invention, a figure that visually has three-dimensional characteristics can be easily created simply by the user instructing to make any two-dimensional figure three-dimensional.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a graphic processing device according to an embodiment of the present invention, and FIG. 2 is a flow diagram showing a main routine according to the invention performed by the central processing unit. FIG. 3 is a flowchart showing the subroutine of the auxiliary line segment creation process, and FIG. 4 is an explanatory diagram showing a three-dimensional pentagon. 5 and 6 are explanatory diagrams for explaining the operation of this embodiment, and FIGS. 7 and 8 are diagrams showing different display examples of three-dimensional figures when the figure attribute is changed to non-transparent. FIG. 9 is an explanatory diagram showing an example of a three-dimensional pie chart, and FIG. 10 is an explanatory diagram showing basic figures constituting a part thereof. 1... Input device 2... Coordinate input device 3.
...Coordinate detection section 4...Displacement amount detection section 5...
Displacement amount storage unit 6... Input control unit 7... Three-dimensional signal detection unit 8... Central processing unit 9... Line segment data creation unit 10... Graphic data copying unit 11... Graphic Attribute changing section 12...Graphic data storage section 13...Video memory 14...Display control section 15--Display device Fig. 2 Fig. 3 Fig. 5 Fig. 6 Fig. 7 Fig. 8

Claims (1)

[Scope of Claims] 1. Comprising a key input means, a coordinate input means, a display means, a means for storing a plurality of graphic data, and an arithmetic processing means, the editing of the graphic data displayed by the display means What is claimed is: 1. A graphic processing device equipped with a graphic processing function for performing the following: A graphic processing device comprising: a three-dimensional expression means for three-dimensionally expressing an arbitrary target figure. 2. The three-dimensional representation means includes an instruction means for instructing the three-dimensional representation of a figure, and a means for moving an arbitrary figure displayed by the display means in parallel based on instructions by the means and displaying its locus as a line segment. The graphic processing device according to claim 1, further comprising: 3. In the graphic processing device according to claim 1 or 2, a means for retaining and expressing a transparent or non-transparent attribute for a geometrically closed figure, and an indicating means for indicating the attribute are provided. A graphic processing device characterized by: