Method for detecting continuous collision based on ellipsoid scanning

A technology of collision detection and ellipsoid, applied in 3D image processing, image data processing, instruments, etc., can solve problems affecting the scope of application of the detection system and detection efficiency, and achieve the effect of taking into account time performance and improving the frame rate of drawing

Inactive Publication Date: 2009-12-02
BEIHANG UNIV
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Problems solved by technology

In addition, many formed foreign collision detection systems have also been applied in actual engineering: such as PQ (Sphere), SOLID (AABB), RAPID (OBB) and Quick-CD (k-Dop), etc., but the above systems are all from Rigid body collision detection algorithms are developed by establishing a certain type of hierarchical bounding volume struc

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  • Method for detecting continuous collision based on ellipsoid scanning
  • Method for detecting continuous collision based on ellipsoid scanning
  • Method for detecting continuous collision based on ellipsoid scanning

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Embodiment Construction

[0043] Such as figure 1 Shown, the concrete implementation method of the present invention is as follows:

[0044] (1) Generate an ellipsoidal bounding volume for the object in the virtual scene, and transform the velocity of the object and the vertex coordinates of its triangular surface into the ellipsoidal space.

[0045] a. The structure of the ellipsoidal bounding volume

[0046] In order to ensure the compactness of the bounding volume, set the three vertices of the triangular patch as p 1 =[p 1，x ,p 1，y ,p 1，z ] T ,p 2 =[p 2，x ,p 2，y ,p 2，z ] T ,p 3 =[p 3，x ,p 3，y ,p 3，z ] T , defining the optimal enclosing ellipsoid of the triangular surface satisfies: the directions of the three axes of the sphere are parallel to the x-axis, y-axis, and z-axis respectively, and the sphere has a small volume. The specific process is as follows:

[0047] First solve the center of the triangle G=[G x , G y , G z ] T

[0048] Then take the center as the center of the ...

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Abstract

The invention relates to a method for detecting continuous collision based on ellipsoid scanning. In order to avoid a penetrating phenomenon in the process of collision detection and ensure completion of a collision response, the method optimizes algorithm steps on the basis of the conventional ellipsoid scanning method and provides a quick indexing system based on regional marks aiming at a physical engine task allocation mode based on regional division. Additionally, a forecasting mechanism is adopted in the process of the collision detection to effectively reduce the call frequency of the collision detection in a simulation cycle. The optimization of a processing procedure is suitable to be applied to the continuous collision detection in a large-scale virtual environment.

Description

technical field [0001] The invention relates to a continuous collision detection method based on ellipsoid scanning. Background technique [0002] It is a common phenomenon in nature that objects come into contact in space, and the task of collision detection is to determine whether two or more objects are in contact or penetrate. Collision Detection (CD), also known as interference detection or contact detection, is a classic problem in computer animation, system simulation, computer graphics, computational geometry, robotics, CAD / CAM and other research fields. In the virtual environment, due to the user's interaction behavior and the movement of objects, objects may often collide. At this time, in order to maintain the fidelity of the virtual environment, it is necessary to detect these collisions in time, calculate the corresponding collision response, and update the drawing scene. [0003] Continuous collision detection, as a key technology of flexible object collision ...

Claims

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Application Information

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IPC IPC(8): G06T15/70G06T1/00G06T15/00
Inventor 何兵王博赵沁平郝爱民王莉莉
Owner BEIHANG UNIV
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