OpenGL Dynamic Software LightMap

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于 2012-08-24 07:46:00 发布

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原文链接：http://www.cnblogs.com/open-coder/archive/2012/08/24/2653547.html

本文介绍了一种使用OpenGL在每帧创建动态软件光映射的方法。在Ubuntu操作系统上构建，采用CMake进行项目管理。该技术将光映射上的每个纹理像素转换为世界空间中的3D位置，并根据当前点光源的位置计算光照强度。利用多重纹理技术将光映射与漫反射图融合，以实现真实感渲染效果。

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dynamic_light_screent_shot-300x225 Here is a simple tutorial for the dynamic software light maps for OpenGL. This program was built on Ubuntu OS. The project management tool is CMake.

In this program, a light map will be created every frame. Each tex-pixel on this light map will be converted into the 3d position in the world space, and light intensity will be calculated based on the current point light source’s position. And the MutiTexturing Technology was used here to blend the light map with the diffuse map. Of course, there are other ways that we could archive the same effect, such as fragment shader real time lighting. This will be much faster than this method, because this will try to run the hardware power as more as possible. Yeach, the GPU could afford to do that, because he has some special and professional operation unit to handle that.

转载于:https://www.cnblogs.com/open-coder/archive/2012/08/24/2653547.html