JPH0320877A - Moving graphic display device - Google Patents

Abstract

PURPOSE:To perform display fitting in a real feeling by applying adjustment so that the more increased travel speed, the more shortened the time interval of update display time when a graphic with arbitrary speed is displayed. CONSTITUTION:The moving graphic display device consists of a processing part 1 to generate display and shape data by inputting the display unit time of a picture, the amount of displacement of the update and display of the graphic per the display time unit, shape data, and displacement amount data, and a display part 2 to display the display shape and the picture by inputting the display and shape data generated at the processing part 1. The adjustment is applied so that the more increaed the travel speed, the more shortened the time interval of the update display when the arbitrary travel speed i.e. the graphic with the amount of displacement per unit time is displayed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dynamic graphic display device comprising at least a processing section and a display section, and in particular, to realize a dynamic graphic display device whose movements match the sense of reality. This article relates to a dynamic graphic display device that can display images. [Prior art] Conventionally, for example, lr rCADlCAMJ series 2-
Functions and configuration of CAD systems (edited by the Japan Society of Mechanical Engineers, Gihodo Publishing Co., Ltd., published August 15, 1987), No. 11
As described on pages 8 to 129, the display time is set in advance, shape data and displacement data are obtained, and the shape data and displacement data are used to calculate the current value for each display unit time. There has been a dynamic graphic display device that obtains display shape data and updates the display based on this data. In this device, the time interval at which the display is updated (display update cycle) is constant at -1.

[Problems to be Solved by the Invention] In this conventional technology, since the display update period is constant as described above, the displacement amount per unit time (
When the displacement angle (or displacement angle) is large, the displayed shape is coarsely displaced, and when it is small, the displayed shape is displaced finely, resulting in a moving image that does not suit the real experience.

For example, as shown in Figure 4, the amount of displacement per unit time (
Or, when the displacement angle ω) is large (that is, it changes at high speed), the display displacement amount per update (updated display displacement ffi) θ is large, so it is displayed roughly as shown in the left figure, and the displacement per unit time is When the amount (or displacement angle ω) is small (that is, changes at low speed), the updated display displacement amount θ is small, so the figure is displayed in detail as shown in the figure on the right.
As a result, the resulting video image does not match the real experience.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to always move the figure with a constant fineness even if the amount of movement (displacement amount or displacement angle) per unit time changes. An object of the present invention is to provide a dynamic graphic display device capable of displaying the state of a graphic.

[Means for Solving the Problems] In order to achieve the above object, the dynamic graphic display device of the present invention has the following features:
The basic concept is to set the update display displacement amount of a figure to a predetermined value in advance, and when displaying a figure with an arbitrary movement speed (display displacement amount per unit time), the update display time interval is set to the movement speed. The present invention is characterized in that it is provided with means for adjusting so that the product of the moving speed and the update display time interval always becomes the predetermined value (constant value) of the update display displacement amount by decreasing the value as the value increases. Specifically, in the dynamic figure display device of the present invention, in a device having at least a processing section and a display section, the display unit time of the screen and the update display displacement amount of a predetermined value of the figure are set in advance, and an arbitrary moving speed is set. Obtain the shape data and displacement amount data of the figure, and calculate the reciprocal of the moving speed (display displacement amount per unit time) of the displacement amount data and @N of the updated display displacement amount per display unit time. The shape data and the displacement amount data are obtained every N times the display unit time, and the display of the figure is thereby updated.

In addition, when moving a line segment of a figure rotationally, the moving speed is given by the displacement angle per unit time, and when moving the line segment in parallel, the moving speed is given by the displacement distance per unit time. .

[Action Co. The operation based on the above structure will be explained.

According to the present invention, when displaying a figure with an arbitrary movement speed (displacement amount per unit time), the product of the movement speed and the update display time interval of the figure is a predetermined constant value. The update display time interval is adjusted by yA so that. In other words, the update display time interval is adjusted to become shorter as the moving speed increases. As a result, even if the movement speed changes,
Since the updated display displacement amount (displacement step) is always a constant value (for example, 4'), the image definition on the screen is constant and no more precise image display performance than necessary is required.

In addition, since the displacement occurs at long time intervals when the movement speed is slow, and at short time intervals when the movement speed is fast, it is possible to display a display that is more realistic. Furthermore, since calculation of display round data and updating of display are intermittent, the load on the processing section is lightened.

Specifically, the reciprocal of the moving speed and the updated display displacement amount per screen display unit time (updating time of one screen, for example, 1/30 second in the case of a normal television screen) The product N is calculated, and the shape data and displacement data are calculated every N times the display unit time and the figure is updated. Therefore, the figure must be updated every N times the period in synchronization with the screen switching. Can be done. [Embodiment] Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 1, 2, 3, 5, and 6.

In this embodiment, a moving image of a line segment in which one end is stationary and the other end is circularly displaced (rotated) will be explained.

Figure 1 shows the structure of a dynamic graphic display device to which the present invention relates.
The dynamic figure display device includes a processing unit 1 for inputting screen display unit time, update display displacement amount of figure per display unit time, shape data, and displacement amount data to create display/shape data. , and a display section 2 for inputting the display/shape data created by the processing section 1 and displaying the display shape on the screen.

FIG. 2 is a list of input data to the processing section 1.

FIG. 6 is a flowchart showing the processing contents of the processing section 1, which will be explained below.

Here, we will show an example where the "r-shape" is used as a line segment.
The "shape data" of a line segment is given by, for example, the length of the line segment, the coordinates of one end point, and the initial direction.

In addition, "displacement amount data" may include, for example, the direction of angular displacement (
rotation direction) and displacement angle per unit time (rotation speed).

Figure 3 is an example of a list of shape data and displacement data. In addition, the "display unit time" of the screen is the unit time for updating the screen that displays moving figures, and is similar to the time interval (frame period) (referred to as T) for updating the screen (rusk) of the television image. It is a kimono, and is given in advance, for example, 1/30 second.

Furthermore, the "update display displacement angle" (referred to as θ) of the figure is the angle at which the figure is displaced each time the figure's display is updated, and is given, for example, 4 degrees. Therefore, the "display displacement angle per display unit time" is given by the graphic update display displacement angle (θ/T t ) per one frame period. Also, the displacement angle of the figure per unit time (r) (taken as ω)
is the speed at which the figure is displaced (moving speed, in this case angular velocity) given to each figure by the user of this dynamic figure display device, and is given as, for example, 15 (40 in another example)"/sec. (Step 11, Step 1 in Figure 6)
2. Step 13). If the above constants are given, the above constant of N jlrN
: The reciprocal (1/ω) of the displacement amount (or displacement angle) per unit time of the displacement amount data and the updated display displacement amount (or updated display displacement angle) per display unit time (θ/ T r
), N is calculated as 8 (3 in another example) according to the product J ([1/ω] [θ/T, ]) (step 14)
.

The above are the steps to be performed in advance before displaying data. Next, a process of repeatedly displaying data prepared in steps 11 to 14 will be explained.

Initially, a counter for performing a repetitive operation is set to O (step 15). The number of counters is not one in total, but one counter is prepared for each shape data. Step 15
Now, set all the counters to O. Next, the following steps from step 16 to step 22 are the operation contents for repeating the display. The operations were described in a non-stop, repeating format. If the operation is to be stopped, it is sufficient to set a limit value for the number of repetitions, etc. outside the repetition limit, and then terminate the operation.

Next, in step 16, all the counters set to O in step 15 are incremented by one. This operation means that the corresponding shape data of the counter is 15°/(1 second/(
1/30 second)) rotation, in another example 40” / (
1 second/(1/30 second)) means it rotated. Also, in terms of time, the state is advanced by (1/30) seconds. Next, in step 17, a search is made to see if there is a counter value equal to N. In the above example, we check whether it is equal to 8 (equal to 3). In this example, whether there is something equal to N means whether there is something whose rotational displacement from the previous position is 7\4". Also, in this example, the display state of the screen is Since it switches every (1/30) second, it will switch 30 times in one second.Also, the maximum rotational speed that can be displayed (ω...!) is obtained when N=1, and at this time, ω. is θ/T, and one screen period T
, the figure is updated every time. In this example, the rotation display switching (update) is set to 4 degrees, so objects up to the maximum rotation speed of 30 x 4 degrees = 120' per second can be displayed with a roughness of 4 degrees. ．． When the value of the counter is equal to N, that is, 8 (3), the processing from step 18 to step 21 is performed on the shape data corresponding to the counter.

When the value of the counter is not equal to N, that is, 8 (equal to 3),
The shape data corresponding to the counter remains in its previous state. In other words, no operations are added. In step 18, the counter value is returned to O.

Next, in step 19, the shape data is changed from the previous position (
The shape data of the position when the robot moves N times in 1/30) seconds is recorded. Just because the display displacement angle is set to 4 degrees does not mean that the display will be rotated by 4 degrees. In this example, (15°/sec) x (1/30) seconds x 8 = 4 @ or (40'/sec) x (1/30) seconds x 3 = 4°, so in either case, Create shape data when advancing. In this case, 4° is obtained when the value of N is an integer value, and corresponds to the preset display displacement angle of 4°.

Generally, the formula (displacement angle ω per unit time x display unit time T, XN)
If there is an integer value N such that the value 0 of (when it becomes a non-integer), it is sufficient to find another integer value N such that θ is around 4°.

The 4° rotational position of the shape data here means (1/
30) It is the position of the shape data when it advances N times in seconds. In the next step 20, the shape data being displayed is deleted.

Next, in step 21, the shape data created in step 19 is displayed. When this process is finished, the process returns to step 17.

In step 17, if there is no counter value equal to N, or if the counter value is equal to N, the processing from step 18 to step 21 is completed, so one processing process of updating the display shape is completed. Step 22
go to. In step 22, the process waits for a time to adjust the display interval. When the time wait is over, return to step 16 for the next repeated operation. By performing the processing steps from step 15 to step 22 described above, the processing section of the apparatus of the present invention
The display shape data of the line segment at that time is obtained every N times the display unit time, that is, every 8 (3) times the display unit time, and the display is updated accordingly.

Here, the "display shape data" is information giving the position of a line segment on the display screen, and is expressed, for example, by the length of the line segment, the coordinates of one end point, and the direction.

Because it operates in this way, the figure, that is, the line segment, is displayed so as to move by 4 degrees each time it is updated, regardless of the displacement angle of the figure per unit time.

Now, the displacement angle per unit time of the figure is l5°/second and 40
If two line segments of /second are displayed, the former will move by 4 degrees every 8/30 seconds, and the latter will move by 4 degrees every 3730 seconds.

? As described above, according to the graphic display device of the present invention, for example, as shown in FIG. The figure is displayed in detail as shown in the figure on the left (the amount of displacement per step is 0), and the figure when the amount of displacement (or displacement angle) ω2 per unit time is small (that is, changes at a low speed) is also displayed as shown in the figure on the right. Since it is displayed in detail (the amount of displacement per step is the same θ), you can obtain a moving image that matches your actual experience. Therefore, the device of the present invention has the following advantages. (1) The definition of both images above may be constant,
No need for more precise image display performance than necessary.

(2) Since the former slow images are displaced at long intervals, and the latter fast images are displaced at short intervals, it is possible to display images that are more realistic.

(3) Since calculation of display graphic data and updating of display are intermittent, the load on the processing section is lightened.

[Effects of the Invention] As explained in detail above, according to the present invention, when displaying a figure of an arbitrary moving speed, by adjusting the update display time interval to become shorter as the moving speed increases, Even if the movement speed changes, the updated display displacement amount will always be a nearly constant value, so the definition on the screen will remain constant and there will be no need for #
It does not require detailed image display performance, and it is possible to always display a display that matches the actual feeling, and the load on the processing section is also reduced.

In addition, the product N of the reciprocal of the movement speed and the update display displacement amount per screen display unit time is calculated, and the shape data and displacement amount data are calculated every N times the display unit time to update the figure. A display device that has a screen display unit time, such as a television device, whose N
This has the effect that the figure can be updated every twice as many cycles.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the structure and data flow of an embodiment of the dynamic graphic display device of the present invention, FIG. 2 is a diagram showing a table of data that is input to the dynamic graphic display device, and FIG. FIG. 4 is a diagram showing an example of an output display screen according to the prior art; FIG. 5 is a diagram showing an example of an output display screen according to the present invention; FIG. 6 is a diagram showing an example of an output display screen according to the present invention. This is a flowchart for explaining the operation. 1...processing section, 2...display section, ω...
...Moving speed (display displacement amount per unit time, display displacement angle per unit time, etc.), θ...Updated display displacement amount (updated display displacement angle). ! HIrIA 4th v! J 14-type Taiyouhani Figure 2 1F3 Figure 15v! J

Claims (1)

[Claims] 1. Setting an update display displacement amount of a predetermined value of a figure in advance, and when displaying a figure having an arbitrary movement speed, the update display time interval is shortened as the movement speed becomes larger. A dynamic graphic display device characterized in that the product of the moving speed and the update display time interval always becomes the update display displacement amount of the predetermined value. 2. In a dynamic figure display device having at least a processing section and a display section, the display unit time of the screen and the update display displacement amount of a predetermined value of the figure are set in advance, and the shape data and displacement amount data of the figure at an arbitrary moving speed are set in advance. Then, the product N of the reciprocal of the movement speed of the displacement data and the updated display displacement amount per display unit time is calculated, and the shape data and displacement data are calculated every N times the display unit time. What is claimed is: 1. A dynamic graphics display device, characterized in that it is configured to obtain the following information and update the display of graphics accordingly. 3. The dynamic figure according to claim 1 or 2, wherein the figure includes a line segment, the moving speed is a rotational angular velocity of the line segment, and the updated display displacement amount is given by an updated display displacement angle. Display device.