/**
* Create a new BSPTree instance from @mesh using @transform
* to transform all vertices, normals, and tangents.
*/
public static BSPTree FromMesh(Mesh mesh, Matrix4x4 transform)
{
BSPTree tree = new BSPTree();
// get a list of all triangles in @mesh
List <Triangle> meshTriangles = GetMeshTriangles(mesh);
// loop through each triangle and transform its vertices by @transform
for (int i = 0; i < meshTriangles.Count; i++)
{
Triangle tri = meshTriangles[i];
for (int vi = 0; vi < 3; vi++)
{
Vertex vtx = TransformVertex(tri.GetVertexByIndex(vi), transform);
tri.SetVertexByIndex(vi, vtx);
}
tri.RebuildOrientationPlane();
meshTriangles[i] = tri;
}
tree.AddTriangles(meshTriangles);
return(tree);
}
