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Fixed spherical texture coordinates around poles.

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This commit is contained in:
Leonardo Zide 2018-01-28 10:03:59 -08:00
parent d3d88ccaf1
commit d7928a78ed
1 changed files with 42 additions and 0 deletions
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42
common/lc_library.cpp
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@ -2781,6 +2781,48 @@ void lcLibraryMeshData::AddTexturedLine(lcMeshDataType MeshDataType, int LineTyp
if (LineType == 4)
CheckTexCoordsWrap(QuadIndices[2], QuadIndices[3], QuadIndices[0]);
auto CheckTexCoordsPole = [&TexCoords, &Vertices, &TextureMap](int Index1, int Index2, int Index3)
{
const lcVector4& FrontPlane = TextureMap.Params[0];
const lcVector4& Plane2 = TextureMap.Params[3];
int PoleIndex;
int EdgeIndex1, EdgeIndex2;
if (fabsf(lcDot(lcVector4(Vertices[Index1], 1.0f), FrontPlane)) < 0.01f && fabsf(lcDot(lcVector4(Vertices[Index1], 1.0f), Plane2)) < 0.01f)
{
PoleIndex = Index1;
EdgeIndex1 = Index2;
EdgeIndex2 = Index3;
}
else if (fabsf(lcDot(lcVector4(Vertices[Index2], 1.0f), FrontPlane)) < 0.01f && fabsf(lcDot(lcVector4(Vertices[Index2], 1.0f), Plane2)) < 0.01f)
{
PoleIndex = Index2;
EdgeIndex1 = Index1;
EdgeIndex2 = Index3;
}
else if (fabsf(lcDot(lcVector4(Vertices[Index3], 1.0f), FrontPlane)) < 0.01f && fabsf(lcDot(lcVector4(Vertices[Index3], 1.0f), Plane2)) < 0.01f)
{
PoleIndex = Index3;
EdgeIndex1 = Index1;
EdgeIndex2 = Index2;
}
else
return;
lcVector3 OppositeEdge = Vertices[EdgeIndex2] - Vertices[EdgeIndex1];
lcVector3 SideEdge = Vertices[PoleIndex] - Vertices[EdgeIndex1];
float OppositeLength = lcLength(OppositeEdge);
float Projection = lcDot(OppositeEdge, SideEdge) / (OppositeLength * OppositeLength);
TexCoords[PoleIndex].x = TexCoords[EdgeIndex1].x + (TexCoords[EdgeIndex2].x - TexCoords[EdgeIndex1].x) * Projection;
};
CheckTexCoordsPole(QuadIndices[0], QuadIndices[1], QuadIndices[2]);
if (LineType == 4)
CheckTexCoordsPole(QuadIndices[2], QuadIndices[3], QuadIndices[0]);
}
for (int IndexIdx = 0; IndexIdx < lcMin(LineType, 4); IndexIdx++)