Method for generating grid using computer

• US 20060291718A1
• Filed: 09/29/2005
• Published: 12/28/2006
• Est. Priority Date: 06/27/2005
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Shimizu, Koichi
• Application Number:
  US11/237,844
• Publication Number:
  US 20060291718A1
• Time in Patent Office: Days
• US Class Current: 382/154
• CPC Class Codes: G06T 17/20 Finite element generation, e.g. wire-frame surface description, tesselation

Abstract

A base grid line running through each vertex of a component is generated by a computer. When the interval between the base grid lines is shorter than the shortest grid interval designated by a user, the relevant base grid line is automatically deleted. According to the number of grid lines designated by the user, one or a plurality of auxiliary grid line(s) is automatically inserted between the base grid lines.

Claims

1. A computer readable recording medium storing a program for generating a grid for the use of an analysis of a physical quantity relating to the geometry of an object using a computer, said program comprising:

generating a plurality of base grid elements, each of which passes through each of a plurality of feature points, which specify the geometry of the object; and

generating an auxiliary grid element of the number designated by grid element number information and arranging the generated auxiliary grid element between the base grid elements.

2. The recording medium according to claim 1, wherein said program further comprises a step of adding or deleting the base grid element according to the shortest interval information, which designates the shortest interval of the base grid elements.

3. The recording medium according to claim 2, wherein the shortest interval information is input by a user using a slider displayed on a display device of the computer.

4. The recording medium according to claim 2, wherein the base grid element is deleted or added in real time in response to the change in the shortest interval information.

5. The recording medium according to claim 2, wherein generation, deletion, and addition of a base grid element are performed on each of an X-Y plane, a Y-Z plane and a Z-X plane, on which the object is projected.

6. The recording medium according to claim 2, wherein said program further comprises a step of deleting or adding the base grid element in accordance with the priority assigned to each of a plurality of objects.

7. The recording medium according to claim 1, wherein the grid element number information is input by a user using a slider displayed on a display device of the computer.

8. The recording medium according to claim 1, wherein the auxiliary grid element is deleted or added in real time in response to the change in the grid element number information.

9. The recording medium according to claim 1, wherein the generation, deletion and addition of the auxiliary grid element are performed on each of an X-Y plane, a Y-Z plane and Z-X plane, on which the object is projected.

10. The recording medium according to claim 1, wherein when adding the auxiliary grid element in response to change in the grid element number information, the auxiliary grid element is inserted in a region where the grid interval is the longest.

11. The recording medium according to claim 10, wherein when a new auxiliary grid element is inserted between a first base grid element and a second base grid element, one or a plurality of auxiliary grid element is arranged so that a region between the first base grid element and the second base grid element is evenly divided by said one or a plurality of the auxiliary grid element.

12. The recoding medium according to claim 1, wherein when deleting an auxiliary grid element in response to change in the grid element number information, the auxiliary grid element is deleted from a region where the grid interval is the shortest.

13. The recording medium according to claim 12, wherein when an auxiliary grid element is deleted from a region between a first base grid element and a second base grid element where a plurality of auxiliary grid elements are present, one or a plurality of the remaining auxiliary grid element is arranged so that the region between the first base grid element and the second base grid element is evenly divided by the remaining auxiliary grid element.

14. A grid generation method for generating a grid for the use of an analysis of a physical quantity relating to the geometry of an object using a computer, comprising:

generating a plurality of base grid elements, each of which passes through each of a plurality of feature points, which specify the geometry of the object; and

generating an auxiliary grid element of the number designated by grid element number information and arranging the generated auxiliary grid element between the base grid elements.

15. The grid generation method according to claim 14, wherein the base grid element is deleted or added according to shortest interval information, which designates the shortest interval of the base grid elements.

16. A grid generation device for generating a grid for the use of an analysis of a physical quantity relating to the geometry of an object using a computer, comprising:

a base grid generator which generates a plurality of base grid elements, each of which passes through each of a plurality of feature points, which specify the geometry of the object; and

an auxiliary grid generator which generates an auxiliary grid element of the number designated by grid element number information and arranges the generated auxiliary grid element between the base grid elements.

17. The grid generation device according to claim 16, further comprising:

a deletion/addition unit which deletes or adds the base grid element according to shortest interval information, which designates the shortest interval of the base grid elements.