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softgpu: Add vertex position transformation code. Seems to be doing something, even though it's not the right thing :/

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Tony Wasserka 2013-06-25 11:53:45 +02:00 • committed by neobrain
parent 55a94f9852
commit 40cdabeb7d
3 changed files with 50 additions and 16 deletions
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18
GPU/Software/TransformUnit.cpp
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@ -40,14 +40,20 @@ ClipCoords TransformUnit::ViewToClip(const ViewCoords& coords)
ScreenCoords TransformUnit::ClipToScreen(const ClipCoords& coords)
{
ScreenCoords ret;
float viewport_dx = gstate.viewportx2 - gstate.viewportx1; // TODO: -1?
float viewport_dy = gstate.viewporty2 - gstate.viewporty1; // TODO: -1?
float viewport_dz = gstate.viewportz2 - gstate.viewportz1; // TODO: -1?
float vpx1 = getFloat24(gstate.viewportx1);
float vpx2 = getFloat24(gstate.viewportx2);
float vpy1 = getFloat24(gstate.viewporty1);
float vpy2 = getFloat24(gstate.viewporty2);
float vpz1 = getFloat24(gstate.viewportz1);
float vpz2 = getFloat24(gstate.viewportz2);
float viewport_dx = vpx2 - vpx1; // TODO: -1?
float viewport_dy = vpy2 - vpy1; // TODO: -1?
float viewport_dz = vpz2 - vpz1; // TODO: -1?
// TODO: Check for invalid parameters (x2 < x1, etc)
ret.x = (coords.x * viewport_dx / coords.w + gstate.viewportx1) * 0xFFFF;
ret.y = (coords.y * viewport_dy / coords.w + gstate.viewporty1) * 0xFFFF;
ret.z = (coords.z * viewport_dz / coords.w + gstate.viewportz1) * 0xFFFF;
ret.x = (coords.x * viewport_dx / coords.w + vpx1) * 0xFFFF;
ret.y = (coords.y * viewport_dy / coords.w + vpy1) * 0xFFFF;
ret.z = (coords.z * viewport_dz / coords.w + vpz1) * 0xFFFF;
return ret;
}