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Method for drawing fully-dynamic fur under global illumination

A global illumination, full dynamic technology, applied in the field of image rendering

Active Publication Date: 2012-02-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are very realistic under global illumination, but they only support hair drawing under fixed parameter conditions, and they have nothing to do with the dynamic changes of hair materials.

Method used

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  • Method for drawing fully-dynamic fur under global illumination
  • Method for drawing fully-dynamic fur under global illumination
  • Method for drawing fully-dynamic fur under global illumination

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Embodiment Construction

[0053] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0054] figure 1 It is a flowchart of a method for real-time rendering of full dynamic hair under global illumination according to an embodiment of the present invention. Such as figure 1 As shown, the steps of the drawing method of the present invention are:

[0055] S1: Input the geometric model and global illumination information of the hair to be drawn;

[0056] S2: Establish a physics-based simplified hair scattering model, and use a linear combination of polynomials and circular Gaussian functions to approximate the azimuth scattering function in the simplified hair scattering model to improve the efficiency of the hair scattering model; wherein the center point is μ, the radius The definition of a circular Gaussian function for λ is:

[0057] g c ( x ; ...

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Abstract

The invention discloses a method for drawing fully-dynamic fur under global illumination. The method comprises the following steps: S1: inputting the geometrical model and global illumination information of the fur to be drawn; S2: establishing a simplified fur scattering model based on physics, approximating a direction scattering function in the simplified fur scattering model by using the linear combination of polynomial and a round Gauss function; S3: establishing a sphere radial basis function model of the global illumination, approximating the sphere radial basis function by using the product of two round Gauss functions, so as to calculate the analytic integral of the global illumination and the fur scattering function; and S4: outputting the drawing result of the fur under the indicated global illumination. By using the method provided by the invention, the fully-dynamic fur can be drawn in real time under the global illumination, the calculating speed is quick, and no pretreatment is needed; and the method supports the fully dynamic change of a light source, a fur material and the fur geometry.

Description

technical field [0001] The invention relates to the technical field of image rendering, in particular to a method for rendering full dynamic hair under global illumination. Background technique [0002] In the field of realistic rendering, the rendering of hair has always been an important topic. As a very important material, hair is widely used in digital entertainment and creative industries such as 3D movies, computer games, and interactive 3D applications. However, due to the complex geometry and scattering properties of hair, the global illumination calculation of hair is very expensive, making it not easy to achieve real-time global illumination of full dynamic hair. In the field of realistic rendering, researchers have been emphasizing the realistic, real-time and dynamic nature of rendering methods. In order to improve the overall effect of fur painting, these properties become the key. Finding a hair rendering method that satisfies these properties at the same ti...

Claims

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Application Information

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IPC IPC(8): G06T15/10G06T15/50
Inventor 徐昆马里千任博胡事民
Owner TSINGHUA UNIV