第二阶段Sprint8

相关阅读:
POJ 1556 The Doors （未完）
setblendstate & setdepthstencilstate
transparent 的新问题
 texCUBE() to CubemapSampler.Sample()
error: The shader requires a sampler in slot 0 which hasn't been set [XXXsampler]
error X3025:global variables are implicitly constant, enable compatibility mode to allow modification
MSAA
check environment var
setDepthStencilState
sampler state