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rasterize: fix viewport and perspective transformations. now triangles are rendered terribly in the correct place

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zeromus 2009-02-02 22:15:46 +00:00
parent fff695d3c1
commit 38d10282f4
1 changed files with 11 additions and 8 deletions
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19
desmume/src/rasterize.cpp
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@ -245,15 +245,18 @@ static void Render()
{
VERT &vert = gfx3d.vertlist->list[i];
//perspective division
vert.coord[0] = (vert.coord[0] + vert.coord[3]) / 2 / vert.coord[3];
vert.coord[1] = (vert.coord[1] + vert.coord[3]) / 2 / vert.coord[3];
vert.coord[2] = (vert.coord[2] + vert.coord[3]) / 2 / vert.coord[3];
vert.coord[3] = 1;
////perspective division
//vert.coord[0] = (vert.coord[0] + vert.coord[3]) / 2 / vert.coord[3];
//vert.coord[1] = (vert.coord[1] + vert.coord[3]) / 2 / vert.coord[3];
//vert.coord[2] = (vert.coord[2] + vert.coord[3]) / 2 / vert.coord[3];
//vert.coord[3] = 1;
//transform to viewport. this is badly broken
vert.coord[0] = (vert.coord[0])*128;
vert.coord[1] = (vert.coord[1])*96;
////transform to viewport. this is badly broken
//vert.coord[0] = (vert.coord[0])*128;
//vert.coord[1] = (vert.coord[1])*96;
vert.coord[0] = (vert.coord[0]+vert.coord[3])*256 / (2*vert.coord[3]) + 0;
vert.coord[1] = (vert.coord[1]+vert.coord[3])*192 / (2*vert.coord[3]) + 0;
int zzz=9;
}