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单词
precomputed radiance transfer
释义
precomputed radiance transfer
Encyclopedia
理学
快速图形绘制技术
释
precomputed radiance transfer; PRT
基于辐射传输预计算的绘制技术
将环境光源近似为某基函数簇的线性组合,并预先计算该基函数簇的辐射传输分量,从而将每个点上的绘制计算简化为一个点积,实现了动态环境光源下的快速绘制。2002年,微软研究院的斯隆(Sloan)研究员提出了辐射传输预计算(precomputed radiance transfer,PRT)技术,此技术可以实现逼真的全局光照绘制效果,并同时达到实时的绘制帧率,后成为图形绘制加速的主流技术之一。给定一个静态场景,在动态的环境光照下,每一点的绘制计算涉及半球面上的积分,计算量较大。
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