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Motion unit bending and torsion angle analytical method based on skeleton motion data

A motion unit and motion data technology, applied in the fields of virtual reality and computer graphics, can solve problems such as automatic deformation of 3D models

Inactive Publication Date: 2012-07-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the prior art. In order to solve the problem of using motion data to drive the three-dimensional model for automatic deformation, a method is proposed to obtain the bending and torsion angle by comparing the position changes of the joint points in the motion unit in the bone motion data. Methods

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  • Motion unit bending and torsion angle analytical method based on skeleton motion data
  • Motion unit bending and torsion angle analytical method based on skeleton motion data
  • Motion unit bending and torsion angle analytical method based on skeleton motion data

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and embodiment the technical solution of the present invention is explained, figure 1 It is a schematic diagram of calculating the bending angle and torsion angle of the motion unit according to the bone motion data in the present invention.

[0032] In the following embodiment, the steps of analyzing the bending angle and twisting angle of the motor unit according to the bone motion data are as follows:

[0033] Three joint points O, B, C, where joint points B and O are connected to form a bone OB, and joint points C and B are connected to form a bone CB, such a structure is called a motion unit.

[0034] Obtain the coordinates O of the joint points O, B, and C in the initial frame from the skeletal motion data 1 =(-0.0992, 0.5433, -0.1511), B 1 =(-0.0540, 0.0299, -0.3395), C 1 =(-0.0891, 0.0151,-0.2561), and the coordinates in the current frame are O 2 =-0.150771, 0.486333, -0.0254434), B 2 = (-0.054, 0.0399, -0.3295...

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Abstract

The invention discloses a motion unit bending and torsion angle analytic method based on skeleton motion data. Firstly coordinates of articulation point in the initial frame and current frame of skeleton motion data are obtained, position change of articulation point of the motion unit in skeleton motion data is compared, so as to obtain bending and torsion angle of each local deformation area ofa complex model in motion. By adopting the method of the invention, the operation that motion data is used for driving a three-dimensional model to carry out automatic deformation can be simplified. Besides, according to related rules of skeleton motion, the method of the invention limits torsion angle in motion unit to be minus 0.5Phi to 0.5Phi, thus the problem of ambiguity in bending and torsion angle operation while analyzing skeleton motion data can be solved.

Description

technical field [0001] The invention relates to a bending and torsion angle analysis method of a motion unit, which belongs to the technical fields of computer graphics and virtual reality. Background technique [0002] In the deformation of 3D models, there are usually the following deformation techniques: Morphing method, FFD deformation method, and bone-based deformation method. The Morphing method realizes deformation by interpolation method, the FFD deformation method realizes deformation by controlling the control volume surrounding the surface of the 3D model, and the bone-based deformation technology realizes deformation by setting the influence weight of the model surface mesh vertices corresponding to the bones. The deformation of some 3D models, such as the deformation of the torso and limbs of the human body, has the following characteristics: the deformation occurs in the area near the joint point, which is a local deformation; the deformation is caused by a seg...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00
Inventor 李凤霞郝云生陈宇峰李仲君黄天羽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY