JP2002063034A - Drawing system and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a 3DCG drawing system and a recording medium, capably of dynamically performing high grade and high-speed plotting in individual environments by absorbing the difference in an operational environment. SOLUTION: This drawing system has a deciding table 17 for indicating the corresponding relationship between a hardware environment of a computer and drawing means executed when drawing 3DCG data 15, acquires hardware information 13 of the computer, compares the hardware information 13 with the decision table 17, performs plotting by selecting the plotting means, executed according to hardware performance from the plural plotting means, measures input interrupted time from an external input device 3, and performs replotting by executing the high-degree plotting means, when the input interrupted time exceeds a fixed time interval.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 3DCG drawing system and a recording medium having a function of dynamically changing drawing means in the field of computer graphics.

[0002]

2. Description of the Related Art In recent years, advances in computer hardware, particularly graphics hardware, have been remarkable. In recent graphics environments, a bump mapping function for expressing irregularities on the surface of an object in a pseudo manner and an environment for reflecting the surrounding scenery have been developed. Higher quality 3D computer graphics (hereinafter 3DC) that can realize the mapping function
G) can be constructed for an object observation system such as an electronic catalog.

[0003]

However, since advanced drawing means such as bump mapping, environment mapping, and anti-aliasing have a high computational load, it is satisfactory to use such advanced drawing means in combination with a low-performance computer. Operation speed cannot be obtained. In addition, when ordinary drawing means is used without using advanced drawing means in order to obtain a sufficient operation speed, the performance of a high-performance computer capable of performing high-quality drawing cannot be fully utilized.

The present invention has been made in view of such a problem, and a 3DCG capable of absorbing differences in operating environments and dynamically performing high-quality and high-speed drawing in each environment.
An object of the present invention is to provide a drawing system and a recording medium.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 provides a hardware environment information acquiring means for acquiring hardware environment information of a computer, and a hardware environment information acquiring means for acquiring the hardware environment information according to the acquired hardware environment information. And a selecting unit for selecting a predetermined drawing unit from among the plurality of drawing units, and the selected drawing unit performs drawing. According to the first aspect of the present invention, it is possible to select the most suitable drawing means according to the performance of the hardware of the computer and perform high-speed drawing.

According to a fourth aspect of the present invention, there is provided a means for measuring an interruption time of an input from an input device, a second selection means for selecting a high-quality drawing means when the interruption time exceeds a predetermined time, 2. The method according to claim 1, further comprising:
The drawing system described in (1). According to the fourth aspect of the present invention, when the input from the input device is not performed for a certain period of time, re-drawing is performed using a high-quality drawing unit, and high-quality drawing is realized even with a low-performance computer.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing the configuration of the 3DCG drawing system 1. 3DCG drawing system 1
Is a drawing system that repeats real-time drawing of a 3DCG image in response to a change in the viewpoint by an input from an operator or the like in order to observe the object shape displayed in the 3DCG image. Storage device 5,
It comprises an external storage device 7, a display device 9, a 3D CG drawing device 11, and the like.

The 3DCG drawing device 11 is the main body of one computer, the external input device 3 is a mouse or the like, the external storage device 7 is a DVD-ROM or the like, and the display device 9 is a CRT or the like. The hardware information storage device 5 is a 3D
It is a memory or the like built in the CG drawing device 11.

The external input device 3 is a device such as a mouse or a joystick for the operator to input information relating to a change in viewpoint for observing the object shape of the 3DCG image.
The hardware information storage device 5 holds hardware information 13 representing the hardware environment of the computer. The hardware information 13 stores the CPU operating speed, the memory capacity,
It consists of information such as the presence or absence of an acceleration device for accelerating DCG drawing and the presence or absence of a unique function of the acceleration device.

The external storage device 7 is a storage device such as a CD / DVD-ROM that holds the 3DCG data 15 and the judgment table 17. The 3DCG data 15 is modeling data for drawing a 3DCG image. The determination table 17 stores the external input device 3 as described in detail later.
A hardware environment and a drawing unit to be executed, in which a high-speed drawing is performed in real time in response to an input from the external device, and a case where high-quality drawing is performed when the input from the external input device 3 is interrupted for a predetermined time. 5 is a table showing the correspondence between the two.

The display device 9 displays a 3D CG image.
It is a device such as an RT. The 3DCG drawing device 11 selects a drawing unit to be executed based on information input from the external input device 3, the hardware information storage device 5, and the external storage device 7, executes the selected drawing unit, and generates a 3DCG image drawn. It is displayed on the display device 9. The 3DCG rendering apparatus 11 includes an external input processing unit 19, a hardware information collection unit 21, a data reading unit 23, a rendering unit determination unit 25, a rendering execution unit 27, and the like.

The external input processing unit 19 reads input information from the external input device 3, converts the input information into viewpoint information on 3D CG, informs the rendering means determination unit 25, and passes it to the rendering execution unit 27. Also, the input interruption time from the external input device 3 is counted and passed to the drawing means determination unit 25. The hardware information collection unit 21 includes the hardware information storage device 5
Hardware information 13 is obtained from the
Pass to 5.

The data reading unit 23 reads the 3DCG data 15 and the judgment table 17 from the external storage device 7,
Rendering execution unit 27, drawing unit determination unit 25
Pass to. When receiving an input from the external input processing unit 19, the drawing unit determination unit 25
And the determination table 17 is selected, and a rendering unit to be executed is selected, and the rendering unit 27 is notified. In this case, the drawing unit is selected to perform high-speed drawing.

The drawing means determination unit 25 determines whether the input suspension time exceeds a predetermined time by comparing the input suspension time with the determination table 17, and if the input suspension time exceeds the predetermined time, the input suspension time and the hardware interruption time are determined. By comparing the hardware information 13 with the determination table 17, a rendering unit to be executed is selected, and the rendering unit 27 is notified. in this case,
The drawing means is selected so as to perform high-quality drawing. The rendering execution unit 27 executes the drawing unit determined by the drawing unit determination unit 25, and performs 3D CG based on the viewpoint information.
The data 15 is rendered and displayed on the display device 9.

FIG. 2 is a diagram showing an example of the judgment table 17. Correspondence between the hardware environment divided by the combination of the CPU operating speed 31 and the presence or absence of the acceleration device 33, and the advanced drawing means 29 executed by the 3DCG drawing apparatus 11 as A, B, and C. Shows the relationship. Also, the judgment table 17
Time information for input interruption determination regarded as input interruption and drawing means 29 executed when input is interrupted are shown.

The drawing means 29A is, for example, a drawing means (bump mapping) for expressing irregularities on the surface of the object in a simulated manner, and the drawing means 29B is a drawing means (anti-aliasing) for adjusting the jaggedness of the rim of the object. Drawing means 2
9C is a drawing unit (environment mapping) that reflects (reflects) the surrounding scenery on the surface of the object. That is,
When all of the drawing units 29A, 29B, and 29C are employed, the highest quality image is generated, and the drawing unit 2
When none of the drawing means 9A, 29B, and 29C is employed, the image quality is the lowest.

In the drawing, “○” means that the corresponding drawing means 29 is executed in real time drawing accompanying the movement of the viewpoint, and “1 sec” means that the corresponding drawing means 29 is used when the input interruption time is 1 second or longer. 29. For example, assuming a personal computer in which the CPU operating speed 31 is “800 MHz” and the acceleration device 33 is “absent”, the drawing units 29B and 29C are executed in real time, and the drawing unit 29A sets the input interruption time to 1 second. Execute when exceeded. If the input is resumed within one second, the drawing means 29A is not executed, and the drawing means 29B,
Perform only 29C.

In the example of the judgment table 17 shown in FIG. 2, the judgment table is created based on the CPU operating speed 31 and the presence / absence of the acceleration device 33. A determination table may be created based on the presence or absence of a function, a version, and the like. In addition, the time considered as input interruption is set to 1 second or 2 seconds. However, the time is not limited to 1 second or 2 seconds, and the drawing means 29 that is not executed regardless of the input interruption time may be indicated by “x”. Furthermore, the drawing units 29A, 29B, and 29C may be given priorities in consideration of the calculation load and the like. The programs and data constituting the 3DCG drawing system 1 may be recorded on a CD-ROM or the like and distributed, or may be distributed on the Internet or the like.

Next, using the flowchart shown in FIG.
The processing procedure in the 3DCG drawing system 1 will be described.
When the 3DCG drawing system 1 is started, the data reading unit 23 reads the 3DCG data 15 from the external storage device 7 and sends it to the rendering execution unit 27 (Step 30).
1). Further, the data reading unit 23 reads the judgment table 17 from the external storage device 7 and sends it to the drawing unit determination unit 25 (Step 302).

The hardware information collection unit 21 acquires the hardware information 13 from the hardware information storage device 5 and sends it to the drawing means determination unit 25 (Step 303).
The external input processing unit 19 acquires input information from the external input device 3 (Step 304). That is, when there is an input from the user, the input information is read, and at the same time, the input interruption time starts counting from "0". Further, the external input processing unit 19 converts the input information into viewpoint information on 3DCG, and passes it to the rendering execution unit 27 (Step 30).
5).

The drawing unit determination unit 25 selects a drawing unit to be executed, and instructs the rendering execution unit 27 (step 306). When there is an input from the user, the drawing means to execute executes the judgment table 17 and the hardware information 1.
3 and the input interruption time is compared with the judgment table 17 and the hardware information 13 when there is no input from the user. The drawing means is selected so as to perform high-quality drawing.

The rendering executing section 27 executes the rendering means selected by the rendering means determining section 25 to render the 3DCG data 15 as viewed from the viewpoint coordinates (step 307), and displays it on the display device 9 to display it on the step 304. Return to (Step 308). Step 304 to step 30
By repeating step 8, it is possible to interactively display a high-speed and high-quality 3DCG image.

According to the above-described processing procedure, when performing real-time drawing in accordance with a change in viewpoint, etc., the drawing means is selected with priority given to the operation speed in accordance with the hardware environment. The selected drawing means is selected and the drawing is performed again. That is, high-speed drawing is performed during the input by the operator, and if the operator interrupts the input and stops at a place where he / she wants to see well, a high-quality image can be seen.

Next, the actual operation using the 3DCG drawing system 1 is described as follows.
The case where the acceleration device 33 is a standard computer having “Yes” will be described as an example. The 3DCG drawing apparatus 11 outputs the 3DCG data 15, the determination table 17, the hardware information 13 (the CPU operation speed 31 is "450M
Hz ", and the acceleration device 33 reads" Yes "), and displays an initial screen created based on the 3DCG data 15 on the display device 9.

When the user inputs viewpoint coordinates using a mouse or the like, the 3DCG rendering device 11 reads the input information and converts it into viewpoint information on 3DCG, and simultaneously starts counting the input interruption time from "0". 3DCG drawing apparatus 11
Compares the determination table 17 with the hardware information 13, selects and executes the drawing unit 29B and the drawing unit 29C, performs high-speed drawing, and displays the 3DCG generated on the display device 9 based on the viewpoint information and the 3DCG data 15. Display an image.

While the user continues to operate the mouse or the like, two advanced drawing means (drawing means 29B and 29C)
When the input is interrupted for one second or longer, the drawing using the advanced drawing means (drawing means 29A, 29B, and 29C) to which the drawing means 29A has been added is used to perform higher-quality drawing and display. Display is performed.

As described above, according to the present embodiment, a high-performance computer performs high-quality drawing using a combination of a large number of advanced drawing means, and a low-performance computer performs drawing with priority given to the operation speed. When there is no time input, redrawing is performed using advanced drawing means, so that a sufficient operation speed and high quality 3DCG image can be obtained.

In the present embodiment, the drawing unit is selected according to the operating environment, but the drawing speed (frame rate)
Is measured and monitored, and the drawing method is selected according to the drawing speed.
May be changed. Depending on the load on the computer,
Since the drawing means is dynamically changed, it is possible to maintain a constant drawing speed even with a low-performance computer. In the present embodiment, the viewpoint is moved by the input from the external input device 7, but the object being displayed on the display device 9 may be moved by the input from the external input device 7. High-speed drawing can be performed when the object is moving, and high-quality drawing can be performed when the object is stationary.

Further, in the present embodiment, for example, the CPU
When the operating speed 31 is 600 MHz or more and there is no acceleration device 33, the drawing units 29B and 29C are not assigned a priority, and the drawing units 29B and 29C are drawn at the same time. You may give priority. For example, drawing may be performed by the drawing unit 29C, and after 0.5 seconds, the drawing may be performed by the drawing unit 29C and the drawing unit 29B. In the present embodiment,
Although the drawing of 3DCG data has been described as an example, the present invention can be applied not only to three-dimensional drawing but also to drawing of general image data.

[0030]

As described in detail above, according to the present invention, a 3DCG drawing system and a 3DCG drawing system capable of absorbing differences in operating environments and dynamically performing high-quality and high-speed drawing in each environment. A recording medium can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system configuration of a 3DCG drawing system 1.

FIG. 2 is a diagram showing an example of a determination table 17;

FIG. 3 is a flowchart showing a processing procedure in the 3DCG drawing system 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 3DCG drawing system 3 ... External input device 5 ... Hardware information storage device 5 7 ... External storage device 9 ... Display device 11 ... 3DCG drawing device 13 ... Hardware information 15 ... 3DCG data 17 ... Judgment table 19 ... External input processing Unit 21 Hardware information collection unit 23 Data reading unit 25 Drawing unit determination unit 27 Rendering execution unit 29 Drawing unit 31 CPU operating speed 33 Acceleration device

Claims (6)

[Claims] 1. A computer comprising: hardware environment information obtaining means for obtaining hardware environment information of a computer; and selecting means for selecting a predetermined drawing means from a plurality of drawing means in accordance with the obtained hardware environment information. And a selected drawing unit performs drawing. 2. The hardware environment information according to claim 1, wherein the hardware environment information is information on a CPU operation speed, a memory capacity, presence / absence of an acceleration device, presence / absence of a function unique to the acceleration device, and the like. Drawing system. 3. The drawing system according to claim 1, wherein the plurality of drawing units are assigned priorities, and the selecting unit selects the drawing units according to the priorities. 4. A device for measuring an interruption time of an input from an input device, and a second selection unit for selecting another drawing means when the interruption time exceeds a predetermined time. The drawing system according to claim 1, wherein: 5. A means for measuring a drawing speed, and selecting means for selecting a predetermined drawing means from a plurality of drawing means according to the measured drawing speed, wherein the selected drawing means is A drawing system for performing drawing. 6. The computer according to claim 1, further comprising:
A recording medium that records a program that functions as the drawing system described in any one of the above.