DESIGNING A THREE-DIMENSIONAL MODELED ASSEMBLY OF OBJECTS IN A THREE-DIMENSIONAL SCENE

• US 20120290271A1
• Filed: 05/01/2012
• Published: 11/15/2012
• Est. Priority Date: 05/11/2011
• Status: Active Grant

• Current Assignee: Dassault Systemes SA
• Original Assignee: Dassault Systemes SA
• Inventors: Diguet, Michaël
• Granted Patent: US 9,183,674 B2
• Time in Patent Office: Days
• US Class Current: 703/1
• CPC Class Codes: G06F 2111/02 CAD in a network environment, e.g. collaborative CAD or distributed simulation
• CPC Class Codes: G06F 2111/04 Constraint-based CAD
• CPC Class Codes: G06F 3/04815 Interaction with a metaphor-based environment or interaction object displayed as three-dimensional, e.g. changing the user viewpoint with respect to the environment or object
• CPC Class Codes: G06F 30/00 Computer-aided design [CAD]
• CPC Class Codes: G06T 19/00 Manipulating 3D models or images for computer graphics
• CPC Class Codes: G06T 19/20 Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts

Abstract

The invention is directed to a computer-implemented method for designing a three-dimensional modeled assembly of objects in a three-dimensional scene, wherein the method comprises the steps of:

• • positioning and orienting a predefined set of trihedrals in the three-dimensional scene, each trihedral defining a position and an orientation;
  • providing a set of objects;
  • attaching each object of the set of objects to one corresponding trihedral of the predefined set of trihedrals;
  • positioning and orienting each object according to the position and the orientation of the corresponding trihedral of the predefined set of trihedrals.

Claims

1. A computer-implemented method for designing a three-dimensional modeled assembly of objects in a three-dimensional scene, wherein the method comprises the steps of:

positioning and orienting a predefined set of trihedrals in the three-dimensional scene, each trihedral defining a position and an orientation;

providing a set of objects;

attaching each object of the set of objects to one corresponding trihedral of the predefined set of trihedrals;

positioning and orienting each object according to the position and the orientation of the corresponding trihedral of the predefined set of trihedrals.

2. The computer-implemented method of claim 1, wherein the step of positioning and orienting each object is carried out according to an adjustment matrix MA_n for an nth object of the set attached to its corresponding trihedral.

3. The computer-implemented method of claim 2, wherein the adjustment matrix MA_n is defined by the relation MA_n=(MST_n)−

1*O_n,

wherein MST_n is the positioning matrix of a nth trihedral of the set in the 3D scene, On is a positioning matrix in the 3D scene of the nth object of the set attached to the nth trihedral of the predefined set of trihedrals.

4. The computer-implemented method of claim 2, wherein the adjustment matrix MA_n is identical for each object of the set of objects.

5. The computer-implemented method of claim 1, wherein the predefined set of trihedrals is deduced from a pattern of an existing object.

6. The computer-implemented method of claim 1, wherein the predefined set of trihedrals is retrieved from a pattern stored in a pattern library.

7. The computer-implemented method of claim 1, wherein the step of providing a set of objects comprises:

selecting at least one object;

computing a plurality of instances of the selected at least one object.

8. The computer-implemented method of claim 1, wherein the step of attaching each object of the set of objects is carried out according to a link associated with each object of the set.

9. The computer-implemented method of claim 1, wherein the step of positioning and orienting the predefined set of trihedrals further comprises applying a constraint on the predefined set of trihedrals.

10. The computer-implemented method of claim 1, wherein the step of positioning and orienting the predefined set of trihedrals further comprises applying parameters modifying the relative positions of the trihedrals of the predefined set of trihedrals.

11. The computer-implemented method of claim 1, further comprising a step of:

displaying in a graphical user interface the predefined set of trihedrals.

12. The computer-implemented method of claim 1, wherein the position and orientation of the predefined set of trihedrals is freely settable in the three-dimensional scene.

13. The computer-implemented method of claim 1, wherein the step of positioning and orienting each object is simultaneously solved with constraints.

14. A computer readable storage medium having recorded thereon a computer program for designing a three-dimensional modeled assembly of objects in a three-dimensional scene, the computer program comprising instructions for execution by a computer, the instructions being adapted for causing the computer to:

position and orientate a predefined set of trihedrals in the three-dimensional scene, each trihedral defining a position and an orientation;

provide a set of objects;

attach each object of the set of objects to one corresponding trihedral of the predefined set of trihedrals;

position and orientate each object according to the position and the orientation of the corresponding trihedral of the predefined set of trihedrals.

15. The computer readable storage medium of claim 14, wherein the positioning and orienting each object is carried out according to an adjustment matrix MAn for an nth object of the set attached to its corresponding trihedral.

16. The computer readable storage medium of claim 15, wherein the adjustment matrix MA_n is defined by the relation MA_n=(MST_n)−

1*O_n,

wherein MST_n is the positioning matrix of a nth trihedral of the set in the 3D scene, On is a positioning matrix in the 3D scene of the nth object of the set attached to the nth trihedral of the predefined set of trihedrals.