shadow map的一些变种

本贴内容转自http://hyzgame.blogspot.com/2009/04/sm.html，一位网友列出的他搜到的所有的shadow map的名称，挺好，方便大家查找，复制到这里。现在TSM似乎比较流行。

SM: Shadow Maps

ASM: Adaptive Shadow Maps

ASM/AFSM: Alias-free Shadow Maps

ASSM: High-Quality Adaptive Soft Shadow Mapping

BSM: Bitmap Shadow Maps

CSM: Cascaded Shadow Maps

CSM: Coherent Shadow Maps

DASM: Dynamic Adaptive Shadow Maps

ESM: Exponential Shadow Maps

LogSM: Logarithmic Shadow Maps

LogPSM: Logarithmic Perspective Shadow Maps

LogTSM: Logarithmic Trapezoidal Shadow Maps

LSPSM/LispSM: Light Space Perspective Shadow Maps (在OpenSceneGraph 2.7/2.8中有见到使用)

LVSM: Layered Variance Shadow Maps

MDSM: Multiple-Depth Shadow Maps

MTSM: Multilayer Transparent Shadow Maps

PLSM: Practical Logarithmic Shadow Maps

PSM: Perspective Shadow Maps

PSSM: Parallel-Split Shadow Maps (中国人发明，见《nvidia GPU Gems 3》第10章)

PSVSM Parallel-Split Variance Shadow Maps

QVSM: Queried Virtual Shadow Maps

RMSM: Resolution-Matched Shadow Maps

RSM: Robust Shadow Maps

SPPSM: Separating Plane Perspective Shadow Mapping

SSM: Standard Shadow Maps

SSM: Subdivision Shadow Maps

SSM: Soft Shadow Maps

SAVSM: summed-area variance shadow maps

SSSM: Simpler Soft Shadow Mapping

TSM: Trapezoidal Shadow Maps

VSM: Variance Shadow Maps

XPSM: Extended Perspective Shadow Maps