JPH01305475A - Graphic processing device - Google Patents

Abstract

PURPOSE:To easily and accurately perform the rotation of a three-dimensional graphic by affecting and displaying a straight line having depth information set in advance and rotary shaft information to which the three-dimensional graphic representing a rotating direction is inputted. CONSTITUTION:When a rotary shaft is selected, a CPU reads in the data of the selected rotary shaft from a rotary shaft data storage memory, and calculates the rotary shaft 4-1 for auxiliary picture, a three-dimensional circle 4-2 for auxiliary picture, and an arrow 4-3 representing the rotating direction. Next, a line of sight vector is read in from a memory for storing line of sight vector, and the rotary shaft for auxiliary picture, the three-dimensional circle, and the arrow are projected from a read-in line of sight vector, then, are displayed on an auxiliary screen 4. Next, when an angle of rotation is inputted, the CPU calculates the angle, and after storing the line of sight vector in a line of a sight vector memory by converting from an input angle, projects the graphic data of the three-dimensional graphic read in from a graphic data storage memory from the line of sight vector after conversion, and displays it on a display 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to CAD in personal computers and workstations, and particularly to a graphic processing device for creating and displaying three-dimensional graphics.

[Conventional technology]

In conventional devices, as described in Japanese Patent Application Laid-Open No. 61-46565, the line-of-sight vector, which is a reference for displaying a three-dimensional figure on a three-dimensional graphic display device, is changed in any direction. However, 3
When rotating a dimensional figure, it is necessary to rely on the user's senses, and little consideration has been given to rotation about the rotation axis.

[Problem to be solved by the invention]

Although the above-mentioned conventional technology allows the line of sight vector to be specified from any direction, it does not take into account the rotation of a three-dimensional figure based on a single rotation axis, and the three-dimensional figure is created by rotating around a certain axis. In order to grasp the shape of a dimensional figure or rotate a three-dimensional figure, it is necessary to rely solely on the user's operation, which places a heavy burden on the user.

The purpose of the present invention is to rotate a three-dimensional figure.

When the user inputs rotation axis information, a straight line with depth information set in advance and a three-dimensional figure centered on the straight line and indicating the rotation direction are displayed, reflecting the input rotation axis information. By doing so, the object is to provide a graphic processing device that is intuitive and easier to handle for the user.

[Means to solve the problem]

The above purpose is to set in advance a three-dimensional figure that indicates a straight line with depth information and a rotation direction around the straight line, and then create a three-dimensional figure that indicates the straight line and the rotation direction based on input rotation reference information. This is achieved by reflecting and displaying on a three-dimensional graphic display device.

[Effect]

A straight line having depth information and a three-dimensional figure indicating a rotation axis direction centered on the straight line are stored in a memory, and when the user performs rotation, the rotation axis is selected from information input from the input means, A three-dimensional figure indicating the straight line and the rotation direction is read from the memory, the read data is converted by the data of the selected rotation axis, and the converted data is displayed on a three-dimensional graphic display device.

This display allows accurate,
Moreover, the axis of rotation and the direction of rotation can be easily recognized, thereby preventing erroneous operation.6 [Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1-5.

FIG. 2 is a diagram showing the configuration of an apparatus according to an embodiment of the present invention. The coordinate input device 2 (tablet this time) and keyboard 3 are:
It is connected to the input controller 11. The input controller ]-1 is connected to the system bus 5, and
A display controller 9 and a CPU 6 are connected to the display controller 9 and the CPU 6. The display controller 9 is connected to a display memory 10 and further connected to the display 1. The CPU 6 also stores a graphic processing program having an auxiliary screen output processing routine and a three-dimensional figure output processing routine for displaying a straight line having depth information and a three-dimensional figure indicating a direction of rotation around the straight line. When the auxiliary screen output processing routine or the three-dimensional figure output processing routine changes the reference line-of-sight vector when displaying on the display, the line-of-sight vector storage memory 12 serves as the base line-of-sight vector; It is connected to a work memory 8 having a rotation axis data storage memory 13 and a figure data storage memory 14 corresponding to three-dimensional figures.

Next, an outline of the graphic processing of this embodiment will be explained based on the flowchart of FIG. Here, the graphic data of the three-dimensional figure to be subjected to graphic processing has already been instructed by the operator using the input device, such as the keyboard 3 or the tablet 2, and the CPU 6 interprets the signal from the operator and processes the graphic data, which is the three-dimensional figure. is created, stored in the graphic data storage memory 12, written to the display memory 10 via the display controller 9, and displayed on the display 1. Furthermore, several rotary axes that can be set freely are arranged, and the rotary axis data It is assumed that the line-of-sight vector is stored in the storage memory 13 and the initialized line-of-sight vector is stored in the line-of-sight vector storage memory 12.

Assume now that a three-dimensional figure 2 as shown in FIG. 1 is the object and is being displayed on the display 1. (FIG. 1(a)) Consider a case where the operator wants to view the three-dimensional figure 2 from a different direction from the current direction in order to confirm the shape of the three-dimensional figure 2. The operator uses the keyboard 3 or the tablet 2 to first make an input to select the rotation axis 6 (Process 31) The CPU 6 receives the input signal, and then
The input signal is analyzed and processed 32), and in this example, rotation axis selection processing (process 33) is performed.1For example, rotation axis 3 in FIG.
If you select , then auxiliary screen 4 in Fig.
, that is, auxiliary screen output processing 34 is performed. The auxiliary screen output process 34 is performed using FIG. First, C
The PU 6 reads the data of the selected rotation axis from the rotation axis data storage memory 13 (process 41), and uses the rotation axis data to determine the rotation axis for the auxiliary screen (Fig. 1, 4-1), the three-dimensional date for the auxiliary screen (the 1 Figure 4-2) and an arrow indicating the direction of rotation (1st
Processes 42, 43, 4.4) to calculate the line-of-sight vector (Figure 4-3) and read the line-of-sight vector from the line-of-sight vector storage memory 12 (
Process 45) Projects the rotation axis for the auxiliary screen, the three-dimensional interior, and the arrow from the read line-of-sight vector, writes it into the display memory 10 via the display controller 9, and displays it on the display 1 (Process 4G) ) (Figure 1(b)).

Next, the operator confirms that the selected rotation axis is correct by looking at the auxiliary screen 4 in FIG. 1, and if it is correct, inputs the rotation angle input, and if it is incorrect, inputs the rotation axis selection again. Now, assume that the rotation angle is correct and input the rotation angle using the keyboard 3 or tablet 2. The input signal is (
Processing 31) Analyzed by the CPU 6 (Processing 32),
Processing 35 is performed, but since the rotation axis has been selected, the CPU 6 performs angle calculation processing (processing 36), and calculates the angle from the input signal. Next, three-dimensional object processing (processing 37
) using Figure 5. The CPU 6 first calculates the line of sight based on the data of the selected rotation axis read from the rotation axis data storage memory 13 (processing 51), the line of sight vector read from the line of sight vector storage memory 12 (processing 52), and the input angle. After converting the vector (process 53) and storing the converted line-of-sight vector in the line-of-sight vector storage memory 12 (process 54), the graphic data of the three-dimensional figure (FIG. 1, 2) read from the graphic data storage memory 14 is converted into ( Process 55) The image is projected from the converted line-of-sight vector, written to the display memory 10 via the display controller 9, and displayed on the display 1. (Process 56) This completes the series of processes.

〔Effect of the invention〕

According to the present invention, since rotation of a three-dimensional figure can be easily and accurately performed, the time for confirming and creating a three-dimensional figure can be reduced;
Furthermore, there is an effect of reducing the mental burden on the operator when creating a three-dimensional shape.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a device configuration diagram, FIG. 3 is a flowchart 1-1 of an outline of graphic processing, and FIG. 4 is a flowchart of an auxiliary screen output processing routine of the present invention.
FIG. 5 is a flowchart of a three-dimensional object output processing routine. 1...Display, 2...Tablet, 3...
Keyboard, 4... Workstation body, 5...
・System bus, 6...CPU, 7...Program memory, 8...Work memory, 9...Display controller, 10...Display memory, 1
DESCRIPTION OF SYMBOLS 1... Input controller, 12... Line-of-sight vector storage memory, 13... Rotation axis data storage memory, 14.
...Graphic data storage memory. Figure 1 (strange) Figure 2 %3 Figure 4 Figure 5

Claims (1)

[Claims] 1. Input means for inputting at least coordinates and angles; storage means for storing three-dimensional graphic information having depth information;
In a graphic processing device having means for rotating input three-dimensional graphic information and a three-dimensional graphic display device for displaying the three-dimensional graphic, in advance,
A straight line with depth information and information on a three-dimensional figure indicating a direction of rotation around the straight line are stored, and when information serving as a rotation reference for the three-dimensional figure is input from the input means, the rotation is performed. A graphic processing device characterized in that a reference is reflected and displayed on a three-dimensional graphic indicating the straight line and rotational direction.