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fix little bug in prior (re #27)

This commit is contained in:
zeromus 2017-02-23 01:55:17 -06:00
parent e277fb2aed
commit 5335312704
1 changed files with 3 additions and 2 deletions
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desmume/src/rasterize.cpp
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@ -1524,8 +1524,9 @@ template<bool CUSTOM> void SoftRasterizerRenderer::performViewportTransforms()
//this was also a better fix for Princess Debut's giant out of range polys.
//Basically, invalid viewports are blithely used here, and the math overflows and wraps around
//NOTE: this is a crude approximation of the correct fixed point modular arithmetic
if(vert.coord[0] >= 256) vert.coord[0] -= 256;
if(vert.coord[1] >= 256) vert.coord[1] -= 256;
//NOTE: you'd think we need >= 256 here, but that just isnt the way it works out (on softrasterizer) right now. coordinates @ 256.0 exactly will come in here.
if(vert.coord[0] > 256) vert.coord[0] -= 256;
if(vert.coord[1] > 256) vert.coord[1] -= 256;
if(vert.coord[0] < 0) vert.coord[0] += 256;
if(vert.coord[1] < 0) vert.coord[1] += 256;