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Hair modelling modeling method based on ball B-spline curve

A technology of spline curve and modeling method, applied in the field of simulation, can solve problems such as hair geometric characteristics, hair thickness, hair volume distribution and hair direction, etc.

Active Publication Date: 2015-07-08
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent also does not solve the geometric characteristics of the hair, the thickness of the hair, the distribution of the hair volume of different hairstyles and the direction of the hair, etc.

Method used

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  • Hair modelling modeling method based on ball B-spline curve
  • Hair modelling modeling method based on ball B-spline curve
  • Hair modelling modeling method based on ball B-spline curve

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Embodiment Construction

[0056] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0057] like figure 1 As shown in the figure, a hair modeling method based on spherical B-spline curve provided by the present invention is specifically described, and the hair modeling modeling method includes:

[0058] Step 1: Initialize the growth point of the hair;

[0059] Step 2: Parametric calculation of the hair;

[0060] Step 3: Calculate the frame and coordinates of the hair;

[0061] Step 4: perform energy minimization calculation on the hair;

[0062] Step 5: Calculate the new frame and coordinates of the hair;

[0063] Step 6: perform collision detection on the hair;

[0064] Step 7: Model the hair according to a spherical B-spline curve.

[0065] In the above method, the original curl of the hair can be calculated using the natural torsion and curvature τw, κ 1 0 and κ 2 0 to indicate that they describe the state...

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Abstract

The invention relates to the technical field of virtual human simulation, in particular to a hair modelling modeling method based on a ball B-spline curve. The hair modelling modeling method based on the ball B-spline curve includes the steps that growing points of hairs are initialized; parametric calculation is conducted on the hairs; a coordinate frame and coordinates of the hairs are computed; energy minimization calculation is conducted on the hairs; a new coordinate frame and coordinates of the hairs are computed; collision detection is conducted on the hairs; modeling is conducted on the hairs according to the ball B-spline curve. According to the hair modelling modeling method, hair strands can be constructed through ball B-splines, the hair modeling is optimized through energy minimization, and the obtained model can be used for various hair models of the virtual human.

Description

technical field [0001] The invention relates to the technical field of virtual human simulation, in particular to a hair modeling modeling method based on a spherical B-spline curve. Background technique [0002] In the prior art, in the fields of graphics and virtual human simulation, hair simulation has always been a challenging physical and computational rendering problem. Hair is one of the main visual elements of cartoon characters, changing the hairstyle can completely change the appearance and image of a task. At the same time, the hair of cartoon characters often also contains the personality and emotions of the characters. Therefore, in the design of cartoon characters, the design of hair plays a key role in shaping the image and character of the characters. [0003] The structure of the hair varies according to the race. The hair of the yellow race is smooth and straight, with a round cross section; the hair structure of the black race is irregular and the cross ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 武仲科王醒策邵菲姜倩倩周明全
Owner BEIJING NORMAL UNIVERSITY
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