标签：
in a projection u from letf to right is 0---1
in another proj u is the same
but when i output u in rgb color it seems different in the middle of the texture
resolution:
u in these two proj are not form 0 to 1 explicit
maybe 0----2 0---1
标签：
原文地址：http://www.cnblogs.com/minggoddess/p/4303499.html
