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Fixed glTF normals when transforms have not been applied in Blender. close #929

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This commit is contained in:
Robert Beckebans 2024-09-04 21:37:46 +02:00
parent dc7b80aead
commit 036318e94e
1 changed files with 7 additions and 13 deletions
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20
neo/idlib/MapFile_gltf.cpp
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@ -153,14 +153,11 @@ MapPolygonMesh* MapPolygonMesh::ConvertFromMeshGltf( const gltfMesh_Primitive* p
bin.Seek( attrBv->byteStride - ( attrib->elementSize * attrAcc->typeSize ), FS_SEEK_CUR );
}
idVec3 normal;
normal.x = vec.x;
normal.y = vec.y;
normal.z = vec.z;
normal *= transform;
// w = 0 because we only want to rotate the normal
idVec4 normal4D( vec.x, vec.y, vec.z, 0.0f );
normal4D *= transform;
idVec3 normal = normal4D.ToVec3();
// renormalize because previous transforms may contain scale operations
normal.Normalize();
@ -203,13 +200,10 @@ MapPolygonMesh* MapPolygonMesh::ConvertFromMeshGltf( const gltfMesh_Primitive* p
bin.Seek( attrBv->byteStride - ( attrib->elementSize * attrAcc->typeSize ), FS_SEEK_CUR );
}
idVec3 tangent;
idVec4 tangent4D( vec.x, vec.y, vec.z, 0.0f );
tangent4D *= transform;
tangent.x = vec.x;
tangent.y = vec.y;
tangent.z = vec.z;
tangent *= transform;
idVec3 tangent = tangent4D.ToVec3();
tangent.Normalize();
mesh->verts[i].SetTangent( tangent );