System and method for operation optimization in hardware graphics accelerator for real-time rendering

• US 20030117403A1
• Filed: 02/07/2002
• Published: 06/26/2003
• Est. Priority Date: 12/24/2001
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Park, Tae Joon, Pyo, Soon Hyoung, Chu, Chang Woo, Choi, Byoung Tae
• Application Number:
  US10/067,321
• Publication Number:
  US 20030117403A1
• Time in Patent Office: Days
• US Class Current: 345/503
• CPC Class Codes: G06T 15/005 General purpose rendering architectures

Abstract

The present invention relates to a system and method for operation optimization in a hardware graphics accelerator for real-time rendering, which optimizes operation number or sequence in the hardware graphics accelerator so as to improve the display speed of three-dimensional objects on a computer screen when the three-dimensional objects are displayed with the hardware graphics accelerator. The invention enables a high screen display speed by analyzing material properties of the 3-D objects prior to screen display and grouping triangles composing the 3-D objects according to the same material property to produce triangle groups as many as the material properties; sorting and managing the triangles in each of the groups according to the distance from a camera; and extracting one triangle most distanced from the camera from the each of the groups at the point of screen display and finally selecting one triangle most distanced from the extracted triangles and outputting the same, in which the triangles are so controlled that another triangle extracted from the same group as the selected triangle is continuously outputted unless the another triangle does not overlap with the triangle extracted from other group even after the selected triangle is displayed. Effective display state is maintained due to distance control from the camera and the state variation is minimized so that a high-speed display is enabled using the hardware graphics accelerator.

Claims

1. A system for operation optimization in a hardware graphics accelerator for real-time rendering, comprising:

a hardware optimization pre-treatment unit for analyzing 3-D object geometric information to compose a material list, analyzing triangles composing 3-D objects, and producing triangle groups as many as the number of material properties when the 3-D object geometric information and material property information are inputted;

a triangle sorting unit for sorting the material property-based triangle groups outputted from said hardware optimization pre-treatment unit according to camera information; and

a triangle select/output unit for extracting the triangles by ones from the each of the sorted triangle groups, selecting triangles to be displayed from the extracted triangles, and outputting the selected triangles into a display device according to object type information.

2. A system for operation optimization in a hardware graphics accelerator according to claim 1, further comprising an object divider for providing the object type information into said triangle select/output unit by dividing the triangles in the material property-based triangle groups into opaque, transparent and translucent objects.

3. A system for operation optimization in a hardware graphics accelerator according to claim 1, wherein the camera information is magnitude of camera distance.

4. A system for operation optimization in a hardware graphics accelerator according to claim 1, wherein said hardware optimization pre-treatment unit comprises:

a material property analyzer for analyzing the 3-D object geometric information to extract only the material property information and composing the material list according to the extracted material property information; and

a triangle grouping device for analyzing a plurality of triangles composing the 3-D object geometric information, grouping the analyzed triangles according to the material property information from said material property analyzer, and adding the grouped triangles to the corresponding material property-based triangle groups.

5. A system for operation optimization in a hardware graphics accelerator according to claim 1, wherein said material property analyzer comprises:

judgment means for referring to the material list composed up to the present that material property is analyzed about one object and judging whether the material property is already contained in the material list; and

generator means for adding the material property of the one object into the material list and generating a new triangle group for managing triangles having the material property if the material property is not contained in the material list at present, wherein said generator means does not add the material property into the material list if the material property is already contained in the material list which is analyzed at present.

6. A system for operation optimization in a hardware graphics accelerator according to claim 1, wherein said triangle select/output unit executes a triangle selecting and outputting step twice to output the opaque objects in the first execution and to output the transparent or translucent objects in the second execution.

7. A system for operation optimization in a hardware graphics accelerator according to claim 6, wherein said triangle select/output unit outputs the opaque objects in their orders of adjacency to the camera and outputs the transparent or translucent objects in their orders of distance from the camera.

8. A system for operation optimization in a hardware graphics accelerator according to claim 1, wherein said triangle select/output unit comprises:

a triangle extractor for primarily extracting one triangle most adjacent to or most distance from the camera from the triangles belonging to each of the triangle groups sorted by said triangle sorting unit to select triangles to be displayed on a screen of said display device;

a first triangle selector for selecting a first triangle from the triangles extracted by said triangle extractor according to the camera information;

a second triangle selector for selecting a second triangle having the same material property as the currently outputted triangle from the triangles extracted by said triangle extractor; and

a triangle output device for (a) judging whether the first and second triangles respectively selected by said first and second triangle selectors overlap with each other on the screen after being displayed, and (b) outputting the second triangle into the display device if the selected first and second triangles do not overlap with each other and outputting the first triangle into the display device if the selected first and second triangles overlap with each other.

9. A method for operation optimization in a hardware graphics accelerator for real-time rendering, said method comprising the following steps of:

when 3-D object geometric information and material property information are inputted,

(a) analyzing the 3-D object geometric information to compose a material list and analyzing triangles composing 3-D objects to produce triangle groups as many as the number of material properties;

(b) sorting the material property-based triangle groups according to camera distance information; and

(c) extracting the triangles by ones from the each of the sorted triangle groups, selecting triangles to be displayed from the extracted triangles and displaying the selected triangles via a display device according to object type information.

10. A method for operation optimization in a hardware graphics accelerator according to claim 9, wherein said (c) step of displaying the selected triangles comprises:

dividing the triangles in the material property-based triangle groups into opaque, transparent and translucent objects to display the triangles according to the divided object type.

11. A method for operation optimization in a hardware graphics accelerator according to claim 9, wherein said (a) step of producing triangle groups comprises the steps of:

(i) analyzing the 3-D object geometric information to extract only the material property information and composing the material list according to the extracted material property information; and

(ii) analyzing a plurality of triangles composing the 3-D object geometric information, grouping the analyzed triangles according to the extracted material property information, and adding the grouped triangles to the corresponding material property-based triangle groups.

12. A method for operation optimization in a hardware graphics accelerator according to claim 11, wherein said (i) step of composing the material list comprises the steps of:

referring to the material list composed up to the present that material property is analyzed about one object and judging whether the material property is already contained in the material list; and

adding the material property of the one object into the material list and generating a new triangle group for managing triangles having the material property if the material property is not contained in the material list at present, wherein the material property is not added into the material list if the material property is already contained in the material list which is analyzed at present.

13. A method for operation optimization in a hardware graphics accelerator according to claim 9, wherein said (c) step of displaying the selected triangles comprises:

executing a triangle selecting and outputting step twice to output the opaque objects in the first execution and to output the transparent or translucent objects in the second execution.

14. A method for operation optimization in a hardware graphics accelerator according to claim 13, wherein the opaque objects are displayed in their orders of adjacency to the camera, and the transparent or translucent objects are displayed in their orders of distance from the camera.

15. A method for operation optimization in a hardware graphics accelerator according to claim 9, wherein said (c) step of displaying the selected triangles comprises the steps of:

primarily extracting one triangle most adjacent to or most distance from the camera from the triangles belonging to each of the sorted triangle groups to select triangles to be displayed on a screen of the display device;

selecting a first triangle according to the camera information and a second triangle having the same material property as the currently outputted triangle from the extracted triangles, respectively;

judging whether the first and second triangles respectively selected overlap with each other on the screen after being displayed; and

if the selected first and second triangles do not overlap with each other, outputting the second triangle into the display device, and if the selected first and second triangles overlap with each other, outputting the first triangle into the display device.

16. A record medium readable by a digital processing unit, said record medium recording a tangibly embodied program of instructions executable by the digital processing unit for carrying out a method for operation optimization in a hardware graphics accelerator for real-time rendering, wherein the program is executed in the following steps of:

when 3-D object geometric information and material property information are inputted,

(a) analyzing the 3-D object geometric information to compose a material list and analyzing triangles composing 3-D objects to produce triangle groups as many as the number of material properties;

(b) sorting the material property-based triangle groups according to camera distance information to output each of the sorted triangle groups; and

(c) extracting the triangles by ones from the each of the sorted triangle groups, selecting triangles to be displayed from the extracted triangles and displaying the selected triangles via a display device according to object type information,

wherein said (c) step of displaying the selected triangles comprises the steps of;

(i) primarily extracting one triangle most adjacent to or most distance from the camera from the triangles belonging to each of the sorted triangle groups to select triangles to be displayed on a screen of the display device;

(ii) selecting a first triangle according to the camera information and a second triangle having the same material property as the currently outputted triangle from the extracted triangles, respectively;

(iii) judging whether the first and second triangles respectively selected overlap with each other on the screen after being displayed; and

(iv) if the selected first and second triangles do not overlap with each other, outputting the second triangle into the display device, and if the selected first and second triangles overlap with each other, outputting the first triangle into the display device.