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Question about creating X-ray images from 3D meshes #14

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@zhihan0210

1. gvxr.makeTriangularMesh input format
In the notebook examples, meshes are loaded from STL files, but I also found gvxr.makeTriangularMesh, which allows creating a mesh from explicit vertices and faces. I attempted to call makeTriangularMesh with:

  • aVertexSet as a flattened list of vertex coordinates: [x1, y1, z1, x2, y2, z2, ...]
  • aTriangleIndexSet as a flattened list of vertex indices: [v0, v1, v2, v3, v4, v5, ...] (3 indices per triangle)
    This fails, and I am unsure whether this input format is correct. Is there any minimal working example using makeTriangularMesh?

2. Coordinate system conventions
I would also like clarification on the coordinate system relationship between:

  • the mesh
  • setSourcePosition
  • setDetectorPosition
  • setDetectorUpVector
    In my tests, the source/detector configuration appears inverted relative to the mesh orientation. Are the mesh, source, and detector defined in the same global coordinate system?

Thank you for your help.

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