Plane shape creation system, plane shape creation method and program recording medium

• US 20070018987A1
• Filed: 05/19/2003
• Published: 01/25/2007
• Est. Priority Date: 05/19/2003
• Status: Active Grant

• Current Assignee: Setoguchi Laboratory Limited
• Original Assignee: Setoguchi Laboratory Limited
• Inventors: Setoguchi ., Ryozo
• Granted Patent: US 7,782,322 B2
• Time in Patent Office: Days
• US Class Current: 345/441
• CPC Class Codes: G06T 15/00 3D [Three Dimensional] image rendering
• CPC Class Codes: G06T 17/00 Three dimensional [3D] modelling, e.g. data description of 3D objects

Abstract

When a fixed polygonal plane patch is called a polygonal plane patch of level 0 and when each vertex of such polygonal plane patch is called a shape composition point of level 0, a normal line of level 0 is set on each shape composition point of level 0, and each normal line of level 0 is decomposed on an equivalent tangent plane to the normal line of level 0. Moreover, a tangent line of level 0 is set by a decomposition in a direction equal to or in the vicinity of the edge of the polygonal plane patch of level 0; and based upon two tangent lines of level 0, a normal line is set on a shape composition point and on a shape composition point of level 1. A plane shape is formed by repeated controls of the above one after another.

Claims

1. (canceled)

2. (canceled)

3. (canceled)

4. (canceled)

5. (canceled)

6. (canceled)

7. (canceled)

8. A method for generating/displaying a plane shape, comprising the steps of:

setting an equivalent normal line with a tangent plane in each vertex of a polygonal shape plane patch which is a basic form necessary for generating/displaying a shape, and setting a tangent line by decomposing said set normal line in a predetermined direction on an equivalent tangent plane; and

specifying a tangent line at position where an equivalent normal line with a new tangent plane between two corresponding vertexes and in a direction which is concerned with corresponding vertexes.

12. The method for generating/displaying a plane shape according to claim 8, wherein

vertexes on which a predetermined normal line exists are combined until a required shape generating/displaying accuracy is reached;

a normal line existing at each predetermined vertex is discomposed on an equivalent tangent surface;

steps of specifying a normal line at a position where a normal line equivalent with a new tangent plane between two vertexes is set and in a direction which is concerned with two corresponding vertexes is repeated; and

thus generating and displaying a shape of desire.

9. A method for generating/displaying a plane shape, said method setting, at a specified position, an equivalent normal line with a tangent plane based on a predetermined normal line and on a specified position and tangent line information.

10. A method for generating/displaying a plane shape, said method setting, at a specified position, an equivalent normal line with a tangent plane based on a predetermined normal line and on a specified position information.

11. The method for generating/displaying a plane shape according to claim 9 or 10, wherein:

vertexes on which said predetermined normal line exists are combined;

a normal line existing at each predetermined vertex is discomposed on an equivalent tangent surface; and

a normal line at a position where an equivalent normal line with a new tangent plane between two vertexes is set and in a direction which is concerned with two corresponding vertexes is specified.

13. A system for generating/displaying a plane shape, comprising a means for choosing a basic patch that possesses a normal line in each one of basic patches that constitute a polyhedron;

wherein

for a basic patch that is chosen, vertexes on which said predetermined normal line exists are combined until a required shape generating/displaying accuracy is reached;

a normal line existing at each predetermined vertex is discomposed on an equivalent tangent surface;

steps of specifying a normal line at a position where an equivalent normal line with a new tangent plane between two vertexes is set and in a direction which is concerned with two corresponding vertexes is repeated; and

an operation for generating and displaying a shape of desire is controlled reflexively and sequentially;

thus generating/displaying a shape of desire.

14. A recording medium for a program for generating/displaying a plane shape comprising a means for choosing a basic patch that possesses a normal line in each one of basic patches that constitute a polyhedron;

wherein

for a basic patch that is chosen, vertexes on which said predetermined normal line exists are combined until a required shape generating/displaying accuracy is reached;

a normal line existing at each predetermined vertex is discomposed on an equivalent tangent surface;

steps of specifying a normal line at a position where an equivalent normal line with a new tangent plane between two vertexes is set and in a direction which is concerned with two corresponding vertexes is repeated; and

an operation for generating and displaying a shape of desire is controlled reflexively and sequentially;

thus generating/displaying a shape of desire.