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Add fog support to software rasterizer (as if it wasn't slow enough already)

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Henrik Rydgard committed 2015-06-11 16:01:17 +02:00
1 parent 7e2f37abc1
commit 842817c91d
5 files changed
+61 -30
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GPU/Software/TransformUnit.cpp
+8 -1
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@@ -172,7 +172,13 @@ VertexData TransformUnit::ReadVertex(VertexReader& vreader)
if (!gstate.isModeThrough()) {
vertex.modelpos = ModelCoords(pos[0], pos[1], pos[2]);
vertex.worldpos = WorldCoords(TransformUnit::ModelToWorld(vertex.modelpos));
vertex.clippos = ClipCoords(TransformUnit::ViewToClip(TransformUnit::WorldToView(vertex.worldpos)));
ModelCoords viewpos = TransformUnit::WorldToView(vertex.worldpos);
vertex.clippos = ClipCoords(TransformUnit::ViewToClip(viewpos));
if (gstate.isFogEnabled()) {
vertex.fogdepth = (viewpos.z + getFloat24(gstate.fog1)) * getFloat24(gstate.fog2);
} else {
vertex.fogdepth = 1.0f;
}
vertex.screenpos = ClipToScreenInternal(vertex.clippos, &outside_range_flag);
if (vreader.hasNormal()) {
@@ -187,6 +193,7 @@ VertexData TransformUnit::ReadVertex(VertexReader& vreader)
vertex.screenpos.y = (u32)pos[1] * 16 + gstate.getOffsetY16();
vertex.screenpos.z = pos[2];
vertex.clippos.w = 1.f;
vertex.fogdepth = 1.f;
}
return vertex;