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softgpu: Implement triangle texture projection.

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Unknown W. Brackets 2022-09-26 18:12:20 -07:00
parent 6282f8b05f
commit faa6c2d461
4 changed files with 46 additions and 14 deletions
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10
GPU/Software/TransformUnit.cpp
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@ -261,6 +261,8 @@ void ComputeTransformState(TransformState *state, const VertexReader &vreader) {
state->negateNormals = gstate.areNormalsReversed();
state->uvGenMode = gstate.getUVGenMode();
if (state->uvGenMode == GE_TEXMAP_UNKNOWN)
state->uvGenMode = GE_TEXMAP_TEXTURE_COORDS;
if (state->enableTransform) {
bool canSkipWorldPos = true;
@ -441,17 +443,11 @@ ClipVertexData TransformUnit::ReadVertex(VertexReader &vreader, const TransformS
case GE_PROJMAP_NORMAL:
source = normal;
break;
default:
source = Vec3f::AssignToAll(0.0f);
ERROR_LOG_REPORT(G3D, "Software: Unsupported UV projection mode %x", gstate.getUVProjMode());
break;
}
// Note that UV scale/offset are not used in this mode.
Vec3<float> stq = Vec3ByMatrix43(source, gstate.tgenMatrix);
float z_recip = 1.0f / stq.z;
vertex.v.texturecoords = Vec3Packedf(stq.x * z_recip, stq.y * z_recip, 1.0f);
vertex.v.texturecoords = Vec3Packedf(stq.x, stq.y, stq.z);
} else if (state.uvGenMode == GE_TEXMAP_ENVIRONMENT_MAP) {
Lighting::GenerateLightST(vertex.v, worldnormal);
}