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An Approximate Rendering Method for Surface Caustic Effect Produced by Transparent Geometric Objects in 3D Scene

A technology for geometric objects and 3D scenes, which is applied in the field of approximate rendering of surface caustics, which can solve the problems of time overhead, long rendering time, and affecting the progress of modeling work.

Active Publication Date: 2017-08-22
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common surface caustic effect rendering technology based on photon mapping takes a long time to draw. Using this technology to realize the surface caustic effect preview of the 3D scene model will generate significant time overhead and affect the progress of the modeling work.

Method used

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  • An Approximate Rendering Method for Surface Caustic Effect Produced by Transparent Geometric Objects in 3D Scene

Examples

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Embodiment Construction

[0036] In order to make the features and advantages of the method more clear, the method will be further described below in conjunction with specific embodiments. In this embodiment, the following three-dimensional scene is considered: the three-dimensional scene includes a table covered with a tablecloth, a newspaper is placed on the table, a glass figurine is placed on the newspaper, the statue is placed in the middle of the newspaper, and the table area occupied by the statue is The desktop area occupied by the newspaper is far smaller; a point light source PS illuminates the 3D scene from the upper right side of the glass statue, and the light passes through the glass statue to form a surface caustic effect on the newspaper on the left side of the glass statue; the material of the glass statue is a mirror surface Transparent material; except for the glass statue, other geometric objects in the 3D scene are diffuse non-transparent materials. The CPU of the computer system i...

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Abstract

The invention discloses an approximate drawing method of surface caustic effects produced by transparent geometric objects in a three-dimensional scene. This method divides the geometric objects in the 3D scene into transparent geometric objects and non-transparent geometric objects, and organizes them with different scene graphs; by first testing whether the light source sampling light intersects with the transparent geometric objects, it reduces the processing of light source sampling rays The amount of computation for the operation. For the surface caustic effect produced by the transparent geometric object being directly irradiated by the point light source, the rendering speed of the surface caustic effect of the 3D scene can be obviously improved by using the method.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional graphics rendering, and relates to an approximate rendering method for surface caustic effects produced by transparent geometric objects in a three-dimensional scene. Background technique [0002] In a 3D scene, the light emitted by the light source is refracted by the smooth and transparent geometric objects, and then propagated to the geometric objects of the diffuse material, which will form an obvious caustic effect on the surface of these geometric objects. For example, the light from the candle on the table is refracted by the transparent glass filled with water on the table, and then spread to the table, which will form caustic spots on the table. When modeling a 3D scene, it is often necessary to quickly preview the visual effect of the built model. If the established 3D scene model contains surface caustic effects, it is also desirable to draw the caustic effects when previewin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T15/06
Inventor 陈纯毅杨华民李华蒋振刚曲福恒李岩芳
Owner CHANGCHUN UNIV OF SCI & TECH
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