JPH052155B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a graphic moving display method for moving a graphic displayed on a display screen from one position to another, or enlarging or contracting the graphic. In particular, the present invention relates to a graphic movement display method that allows graphic movement to be smooth and at high speed.

BACKGROUND ART Conventionally, as shown in FIG. 5, a position information input device 1, a central processing unit (CPU) 2, a memory 3,
In an image display device having a display 4, a figure displayed on the screen of the display 4 can be moved or transformed in the following manner.
That is, position information is input to the central processing unit 2 by operating a position information input device 1 such as a trackball or a mouse, and the central processing unit 2 converts this into an address signal and sends it to the memory 3 via the address bus 5. The address signal is sent to the memory 3 to designate the address at which data is to be written, and the data is stored at the designated address via the data bus 6. Here, each address of the memory 3 has a 1:1 correspondence with each address of the screen of the display 4, so that when data is stored in the memory 3, a figure is automatically displayed on the screen of the display 4. It's getting old. Therefore, any figure can be displayed by storing data in the corresponding address of the memory 3 according to the figure desired to be displayed. And the sixth
As shown in the figure, in order to move the figure 7a displayed on the screen 4' of the display 4 to the position 7d, rotate the track ball as the position information input device 1, and follow the rotation operation each time. Write the data of the shape sequentially to the address in the movement direction,
The display was sequentially displayed and moved to the next position like 7a → 7b → 7c → 7d. That is, the movement was performed by erasing 7a and displaying 7b, then erasing 7b and displaying 7c, and then erasing 7c and displaying 7d.

Problems to be Solved by the Invention However, in this figure movement display method, the entire contour of the figure being moved is completely displayed as a solid line in the process of movement, so it is difficult to display figures with particularly complex shapes. However, it took time to move, enlarge, and reduce. To deal with this, it would be possible to repeatedly display and erase figures in the middle of movement at high speed, but in this case, the entire image display device must be configured to be capable of high-speed processing, which would require complicated and It was expensive. It is also possible to omit the display of the figure in the middle of movement as appropriate and repeat the display and deletion by increasing the jump distance, but in this case, the movement of the figure will feel jerky and In some cases, it was not possible to accurately move to the desired end position. Therefore, an object of the present invention is to solve such problems.

Means for Solving the Problems The means of the present invention for solving the above problems rewrites data in memory based on position information sent from a position information input device, and displays data on a display according to changes in the data. In a figure moving display method that displays or erases a figure on the screen and moves or transforms the figure, if the position information from the input device is changing sequentially, the representative outline of the figure is set as a point or a broken line. This is performed by a figure moving display method characterized in that the figure is displayed in a simplified manner with , and when the position information no longer changes, the entire outline of the figure is completely displayed with a solid line.

Embodiments Hereinafter, the graphic moving display method of the present invention will be explained with reference to the accompanying drawings.

FIG. 1 is a flowchart showing the procedure of a graphic moving display method according to the present invention. The image display device that executes the procedure of the present invention, as shown in FIG. 4. First, operate the position information input device 1 to input the position information of the figure to the central processing unit 2, convert it into an address signal and send it to the memory 3, and then input the position information of the figure to the central processing unit 2. By writing data to the address, screen 4' of display 4
For example, a figure 8a is displayed on the top, as shown in FIG. Next, the graphic 8a is moved to the position 8e on the screen 4', and graphic movement is started (step A in FIG. 1). At this time, for example, a track ball serving as the position information input device 1 is rotated in the direction in which the figure 8a is desired to be moved, and the central processing unit 2 receives the position information sequentially sent from the position information input device 1 according to this rotation operation. Load (B). Now, assuming that the figure 8a is moved to the position 8b, the central processing unit 2 compares the previously read position information of the figure 8a with the current position information of the figure 8b,
determine if that input signal is changing
(C). If the input signal is changing from figure 8a to figure 8b, the process advances to the "YES" side. This progression to the "YES" side means movement of the figure, and the central processing unit 2 writes data that displays the representative contour of the figure as a dot or a broken line to the corresponding address in the memory 3, as shown in the broken line in FIG. As in, the moving figure 8
Briefly display b (D). In this state, the operator determines whether the graphic 8b has been moved to the desired position while looking at the display position of the graphic 8b (E). here,
Since it is still in the middle of movement, do not press the set button but proceed to the "NO" side and return to the step B above.
Then, the central processing unit 2 reads the position information sequentially sent from the position information input device 1 (B). In this way, when the position information is changing sequentially by operating the position information input device 1, the sequence changes from B→C→
Steps D→E→B are repeated, and during that time, figures 8b, 8c, and 8d are sequentially displayed in a simplified manner with broken lines on the screen 4' of the display 4, and are erased one after another. go.

Once the figure has been moved to the desired position 8e in this way, the operator
Stop operation. Then, in this stopped state, the central processing unit 2 reads the position information sent from the position information input device 1 (B), and determines whether the input signal is changing (C). At this time, the operation of the position information input device 1 has stopped at the position of the figure 8e, and since the input signal has not changed from the previous position information, it proceeds to the "NO" side. This progression to the "NO" side means that the figure is stationary, and the central processing unit 2 writes data for displaying the entire outline of the figure in a solid line to the corresponding address in the memory 3, as shown in the solid line in FIG. , completely display the stationary figure 8e (F). In this state, the operator judges whether the graphic 8e has been moved to the desired position while looking at the display position of the graphic 8e (E). If it is determined that the setting is still insufficient, proceed to the "NO" side without pressing the set button, return to the previous step B, and repeat the above operation. When it is determined that the figure has been moved to the desired position, press the set button and proceed to the "YES" side. This ends the shape movement (G).

FIG. 3 is an explanatory diagram showing the state when the figure 9a displayed on the screen 4' of the display 4 is reduced to 9d or the figure 9d is enlarged to 9a. In this case, the figures that are being reduced or enlarged, such as figures 9b and 9c, may be simply displayed with broken lines.

In addition, in FIGS. 2 and 3, the moving figure is simply shown as a broken line, but the present invention is not limited to this, and as shown in FIG. 4, for example, only the four corners of the rectangular figure 8a are shown. may be displayed as "dots", and the moving figures may be displayed simply as 8b', 8c', and 8d'. In this case, figure movement can be further accelerated. Further, the branching between simple display and complete display of a figure may be controlled by any method such as flag sensing or interrupt.

Effects of the Invention As explained above, the present invention is designed so that when the position information from the position information input device 1 is changing sequentially, the representative outline of the figure is displayed simply with dots or broken lines. Graphics can be displayed and erased quickly, and graphics can be moved and displayed at high speed as a whole. In this case, the entire image display device does not need to have a configuration capable of high-speed processing, and can be realized easily and at low cost. In addition, there is no need to particularly increase the jumping distance when displaying a figure that is in the middle of movement, and on the contrary, it is possible to make the jumping distance smaller than before, making the movement of figures smoother and ensuring that the desired movement ends. Can be moved to a precise position. Furthermore, when the figure movement is completed, the entire outline of the figure can be completely displayed with solid lines as in the conventional case.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the procedure of a graphic moving display method according to the present invention, and FIG. 2 is an explanatory diagram showing the moving state of a graphic displayed on a display screen.
FIG. 3 is an explanatory diagram showing enlargement and reduction states of figures displayed on the display screen, FIG. 4 is an explanatory diagram showing another example of simplified display while the figure is moving, and FIG. 5 is an explanatory diagram showing the conventional example and FIG. 6 is a block diagram showing an image display apparatus according to the present invention, and is an explanatory diagram showing the moving state of a figure displayed on a display screen in a conventional figure moving display method. 1...Position information input device, 2...Central processing unit, 3...Memory, 4...Display, 4'...
...Display screen, 8a, 8e... Figures in full display at rest, 8b, 8c, 8d... Figures in simplified display while moving.

Claims (1)

[Claims] 1 A figure moving display that rewrites data in memory based on position information sent from a position information input device, displays and erases figures on a display screen according to changes in the data, and moves or transforms the figures. In this method, when the position information from the position information input device is changing sequentially, the representative outline of the figure is displayed in a simplified manner with dots or broken lines, and when the position information no longer changes, the entire outline of the figure is displayed. A figure movement display method characterized by completely displaying a solid line.