JP2663868B2 - Graphic display control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic display control system, and more particularly, to a graphic display control system for displaying data obtained as a result of information processing by a computer system, data obtained from a measuring device or a control device, etc. The present invention relates to a graphic display control method for performing control for displaying as a graphic.

[0002]

2. Description of the Related Art In recent years, CG (Computer Grass)
Advances in computer animation technology in the field of phis) have increased the need for such graphic display control schemes. For the computer animation, see, for example, Section 8.4 of “CG Handbook, edited by The Japan Society for Zigzag, Morikita Publishing, published May 20, 1989”.

Conventionally, this type of graphic display control system is shown in FIG.
The processing as shown in FIG. 7 has been executed by the configuration as shown in FIG.

The operation of the conventional graphic display control system will be described below.

First, the motion data input section 62 inputs motion data for one scene and sets the motion data in the drawing command storage section 61 (step 701).

[0006] The motion data refers to data that defines the temporal change of a graphic that fluctuates over time (dynamic graphic). The motion data is defined, for example, in the form of a matrix (animation matrix). In this case (when motion data is defined in the form of a matrix), it is assumed that a basic matrix that expresses basic motions of the animation (enlargement / reduction, rotation, movement, etc.) is defined. Animation information for a scene (for example, a displacement amount when moving a figure from one coordinate to another coordinate or a rotation angle when rotating a figure around a certain point) is defined as an animation matrix (see the above-mentioned document). Pp. 431 and 432, etc.).

The drawing command storage section 61 is composed of a command string storage table and a drawing parameter block. The instruction string storage table has records corresponding to each figure, and each record includes a record number, a figure name, and a drawing parameter storage area address. The drawing parameter block has a drawing parameter storage area corresponding to each record. In the drawing parameter storage area corresponding to the dynamic graphic, there is an area for setting motion data.

Next, the drawing command execution unit 63 temporarily deletes all the graphics currently displayed on the screen of the display device 64 (step 702).

Further, the drawing command execution unit 63 sequentially executes the drawing commands in the drawing command storage unit 61 to display the next scene (step 703). Here, the order of execution of the drawing commands is the order of storage in the command sequence storage table in the drawing command storage unit 61, and does not conform to the concept of “priority” in the present invention described later.

When the execution of one drawing command is completed, the drawing command execution section 63 determines whether or not the execution of all drawing commands in the scene has been completed (performs drawing completion determination) (step 704).

If it is determined in step 704 that the execution of all drawing commands has not been completed (drawing has not been completed), the drawing command execution unit 63 executes step 703 to execute the next drawing command. Return control to

On the other hand, the drawing command execution unit 63
If it is determined in 04 that “the execution of all drawing commands has been completed (drawing completed)”, control is passed to the motion data input unit 62. The motion data input unit 62 to which the control has been passed determines whether display of all scenes to be displayed has been completed (performs scene end determination) (step 705).

The motion data input unit 62 executes step 705
To display all scenes (all scenes ended)
If this is determined, the current animation display processing is terminated.

On the other hand, when the motion data input unit 62 determines in step 705 that “there are still scenes to be displayed (all scenes have not been completed)”, the motion data set for one scene in the next scene (Step 70)
Return control to 1).

As is apparent from the above description of the operation, in the conventional graphic display control method, the loop of steps 703 and 704 must be performed until the drawing processing (execution of the drawing command of all figures) in a certain scene is completed. Had been repeated. Conversely, when the loop of steps 703 and 704 has been completed for all drawing commands, the display has immediately shifted to the display of the next scene at that point.

Therefore, in the conventional graphic display control method, the scene transition speed at the time of executing the animation display depends on the hardware that realizes the graphic display control method (the hardware used to execute the graphic display control method). ) Depending on the performance (processing speed, etc.). For example, when a certain graphic display control method is realized by hardware A, it is assumed that 30 scenes can be displayed per second. At this time, when the graphic display control method is realized by hardware B whose processing speed is ten times slower than hardware A, only three scenes can be displayed per second. When the graphic display control method is realized by hardware C whose processing speed is 10 times faster than hardware A, the execution of animation display of 300 scenes is completed in one second.

[0017]

In the above-described conventional graphic display control method, the transition speed of the scene when executing the animation display is fixedly determined by the performance of the hardware. was there.

When the graphic display control method is realized on low-speed hardware, the time required for displaying an animation of each scene increases. Therefore, the motion of the animation is slower than the human eye allows. In addition, for example, when data is constantly captured using a measuring device at fixed time intervals and the data (measurement data) is displayed as an animation, the completion of the drawing process within a certain time is not guaranteed. Will fail to capture measurement data.

When the graphic display control method is realized on high-speed hardware, the speed of animation display is too high for human eyes.

An object of the present invention is to provide a graphic display control method capable of displaying an animation at a constant speed independent of hardware performance in view of the above points.

[0021]

According to the graphic display control method of the present invention, a drawing command storage unit for storing drawing commands of each figure after setting priorities, and storing motion data of each scene in an external data source. A motion data input unit for inputting data from the CPU and setting it in the drawing command storage unit; and a timer for monitoring an elapsed time of a drawing process corresponding to one scene and issuing a timer interrupt when the elapsed time exceeds a monitoring interval time. A monitoring unit,
Each drawing command in the drawing command storage unit is executed in the order of priority based on the motion data input by the motion data input unit, and processing is performed when execution of all drawing commands corresponding to one scene is completed. A rendering command execution unit for terminating a rendering process and terminating a rendering process corresponding to one scene when a timer interrupt is issued by the timer monitoring unit; A display device for displaying graphics.

[0022]

According to the graphic display control method of the present invention, the drawing command storage unit stores the drawing commands of each figure after setting their priorities, and the motion data input unit transmits the motion data of each scene from an external data source. The timer monitoring unit monitors the elapsed time of the rendering process corresponding to one scene, and issues a timer interrupt when the elapsed time exceeds the monitoring interval time. The drawing on the screen is displayed based on the execution of the drawing command by the drawing command execution unit, and the drawing command execution unit performs the following processes (1) to (4). Each drawing command in the drawing command storage is executed in the order of priority based on the motion data input from the motion data input unit. When the execution of all the drawing commands corresponding to one scene is completed, the processing is stopped. When a timer interrupt is issued by the timer monitoring unit, the drawing process corresponding to one scene is ended.

[0023]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a graphic display control system according to one embodiment of the present invention.

The graphic display control method according to the present embodiment includes a drawing command storage unit 1, a motion data input unit 2, a drawing command execution unit 3,
, A timer monitoring unit 4 and a display device 5.

FIG. 2 is a flowchart showing the processing of the graphic display control method according to this embodiment. This processing includes a timer setting step 201, a counter setting step 202, a motion data setting step 203, a display graphic deletion step 204, a drawing command execution step 205, a drawing end determination step 206, a processing stop step 207, Timer interrupt processing step 208 and interruption processing step 20
9 and a scene end determination step 210.

FIG. 3 is a diagram showing the configuration of the drawing command storage unit 1 in the graphic display control system of this embodiment and an example of its contents. The drawing command storage unit 1 includes a command string storage table 11 and a drawing parameter block 12 that is a set of drawing parameter storage areas for storing drawing parameters describing the contents of each figure drawing command.

The instruction string storage table 11 has a record for each figure, the record including a record number, a figure name, a priority, and a drawing parameter storage area address.
Here, the “priority” refers to information indicating a display priority of a graphic (an execution priority of a drawing command corresponding to the graphic) (here, a smaller value indicates a higher priority). ing).

The drawing parameter block 12 has a drawing parameter storage area including position and shape data. Here, the data in the area of the “position” of the dynamic graphic (vehicle) corresponds to the motion data.

Information corresponding to the screen of FIG. 4 is set in the drawing command storage unit 1 shown in FIG. 3, and the command sequence storage table 11 stores seven records (car, road, house, mountain, land, sun). And records corresponding to each figure of the tree).

FIG. 4 is a diagram showing an example of a screen displayed by the control of the graphic display control method according to the present embodiment.

FIG. 5 is a diagram for explaining the operation of the graphic display control method according to the present embodiment.

Next, the operation of the graphic display control system according to the present embodiment configured as described above will be described. Here, the operation in the case where the screen shown in FIG. 4 (animation screen including cars, roads, houses, mountains, land, the sun, and trees) is displayed will be described. As described above, in this animation screen, "automobile" is treated as a moving figure (dynamic figure).

Prior to the animation display processing, an instruction string storage table 1 in the drawing instruction storage 1
Each record in 1 is sorted by priority. Such a sort process is performed to improve the execution speed of the drawing command. However, it is possible to realize the present invention even if such sort processing is not performed in advance (as long as the information of “priority” exists in each record, the execution order of the drawing command is recognized. Is possible).

When the animation display processing is started, the following processing is performed (see FIG. 2).

First, the timer monitoring unit 4 sets a reference time (monitoring interval time T) for monitoring the elapsed time of the drawing process corresponding to one scene (performs timer setting) (step 201). In this embodiment, 30 seconds per second
Assuming a case where a scene is updated twice (a case where 30 scenes are displayed per second), 33 ms is set as T.
Note that the value of 33 milliseconds is merely an example, but is considered to be a general guideline.

Further, the drawing command execution section 3 initializes a scene counter S for counting the number of motion data inputs (the number of scene updates) (performs counter setting) (step 202). That is, 0 is set as S.

Assuming that the above initial settings have been made, the motion data input unit 2 stores the motion data for one scene fetched from an external data source (for example, a measuring device) into a drawing command. It is set in the drawing parameter block 12 in the unit 1 (step 203). That is,
In this case, the position data of the figure “car” is set in the “position” area in the drawing parameter storage area corresponding to “car” in the drawing parameter block 12.

Next, the drawing command execution unit 3 temporarily deletes all the graphics (graphics of the previous scene) currently displayed on the screen of the display device 5 (step 204).

The drawing command execution unit 3 reads one drawing command from the drawing command storage unit 1 and executes it (step 205). By executing the drawing command, a graphic corresponding to the drawing command is displayed on the screen of the display device 5.

Next, when the execution of one drawing command is completed, the drawing command execution unit 3 determines whether or not the execution of all drawing commands in the scene has been completed (performs a drawing completion determination) (step S1). 206).

If it is determined in step 206 that the execution of all drawing commands has not been completed (drawing has not been completed), the drawing command execution unit 3 executes step 205 to execute the next drawing command. Return control to

On the other hand, the drawing command execution unit 3 determines in step 20
Step 6: "Execution of all drawing commands is completed (drawing completed)"
When it is determined that the drawing for one scene has been completed, the graphic display control method of the present embodiment is in a processing stopped state (a state in which the processing is temporarily stopped after exiting the loop of steps 205 and 206). (Step 20
7).

The timer monitoring unit 4 always monitors the elapsed time of the drawing process in the scene, and forcibly executes the timer interrupt process when the elapsed time of the drawing process exceeds the monitoring interval time T ( Step 208). That is, the above-described drawing processing for one scene (step 20)
3 to 206) or a process stop state (step 207), a timer interrupt is issued to the drawing command execution unit 3 at that time.

When receiving the timer interrupt issued by the timer monitoring unit 4, the drawing command execution unit 3 ends the drawing process of the scene and adds 1 to the value of the scene counter S (performs the interruption process) (step). 209).

As a result, even if the drawing process is being executed (steps 203 to 206), the drawing process for the scene ends in the middle. For example, when displaying the scene on the screen shown in FIG. 4, if the monitoring interval time T has elapsed at the time when the mountain is drawn, the priority order is 1 or 2
The drawing process ends with only the car, road, house, and mountain being displayed, and the display screen at that time is as shown in FIG.

Next, the motion data input unit 2 determines whether display of all scenes to be displayed has been completed (performs a scene end determination) (step 210). This judgment is
This is performed by determining whether or not the value of the scene counter S has reached the number of all scenes.

If it is determined in step 210 that "display of all scenes has been completed (end of all scenes)", the motion data input unit 2 terminates the current animation display processing.

On the other hand, the motion data input unit 2
If it is determined in step 10 that "there are scenes to be displayed (all scenes have not been completed)", the process of "motion data set" for one scene in the next scene (step 203)
And control of the animation display is continued.

As described above, the drawing process in each scene always ends when the designated monitoring interval time T has elapsed, whether the execution of all drawing commands is completed or interrupted. That is, when the graphic display control method of this embodiment is realized on low-speed hardware, the interruption processing of step 209 causes the interruption processing of steps 205 and 206 to be performed.
Even during the repetitive processing of the loop, the drawing process in the scene is terminated, so that the control is forcibly shifted to the next scene in a fixed time (monitoring interval time T) regardless of the performance of the hardware. You. Further, when the graphic display control method is realized on high-speed hardware, the transition to the processing stop state in step 207 is performed, so that a fixed time (monitoring interval time T) regardless of the performance of hardware. ) Is controlled so as not to shift to the next scene until elapse.

[0051]

As described above, the present invention does not depend on the performance of hardware by monitoring the elapsed time of the drawing process in each scene by the timer monitoring unit and setting the execution priority for each drawing command. This has the effect that animation display at a constant speed (appropriate speed) becomes possible.

That is, when the graphic display control method of the present invention is realized on low-speed hardware, the display of one scene is stopped at a fixed time (monitoring interval time), thereby realizing high-speed animation display. can do. In addition, at the time of "cutting off the display of one scene", the execution of the drawing command with a low priority is omitted, so that the above-described "speed-up of animation display" can be realized after an important graphic is displayed. .

When the graphic display control method of the present invention is realized on high-speed hardware, the processing is temporarily stopped when the rendering processing of one scene is completed within the monitoring interval time. In addition, the speed of animation display can be reduced (optimized or visualized).

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a graphic display control method according to an embodiment of the present invention.

FIG. 2 is a flowchart showing processing of the graphic display control method shown in FIG.

FIG. 3 is a diagram illustrating a configuration of a drawing command storage unit in FIG. 1;

FIG. 4 is a diagram showing an example of a screen displayed by control of the graphic display control method shown in FIG.

FIG. 5 is a diagram for explaining an operation of the graphic display control method shown in FIG. 1;

FIG. 6 is a block diagram showing a configuration of an example of a conventional graphic display control method.

FIG. 7 is a flowchart showing processing of the graphic display control method shown in FIG. 6;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drawing command storage unit 2 motion data input unit 3 drawing command execution unit 4 timer monitoring unit 5 display device 11 command string storage table 12 drawing parameter block

Claims (4)

(57) [Claims] 1. A drawing command storage unit for storing a drawing command of each figure after setting a priority, and a motion for inputting motion data of each scene from an external data source and setting the data in the drawing command storage unit A data input unit, a timer monitoring unit that monitors an elapsed time of the drawing process corresponding to one scene, and issues a timer interrupt when the elapsed time exceeds a monitoring interval time; Each drawing command in the drawing command storage unit is executed in the order of priority based on the motion data. When execution of all drawing commands corresponding to one scene is completed, the process is stopped, and the timer monitoring unit sets A drawing command execution unit for terminating a drawing process corresponding to one scene when a timer interrupt is issued; and a graphic on the screen based on execution of the drawing command by the drawing command execution unit. Graphic display control method characterized by having a display device for performing display. 2. A drawing command storage unit including a command string storage table including records including a graphic name, a priority order, and a drawing parameter storage area address, and a drawing parameter block including a drawing parameter storage area corresponding to each figure. 2. The graphic display control method according to claim 1, wherein: 3. The graphic display control method according to claim 1, further comprising a drawing command storage unit for storing a group of records that have been sorted in advance by priority. 4. The graphic display control method according to claim 1, wherein a monitoring interval time used for monitoring by the timer monitoring unit is 33 milliseconds.