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Known limitations

This page lists current constraints that affect maintenance. The last verified dependency revisions and test counts are in NEXT.md.

  • Two OrthographicCameraTests are deliberately skipped. CNA's BoundingFrustum::Contains classifies a point exactly on a clipping plane as Intersects; those tests expect the upstream Contains result. See the skip comments in tests/CNA/Extended/OrthographicCameraTests.cpp.
  • World3DEXT is a separate extension and does not replace every easy-3d feature. In particular, it lacks a general CPU-side static batching API for arbitrary cube and billboard scenes. The historical comparison is in issues.md. Its chunked voxel tilemap renderer addresses a narrower case.
  • System::Xml::XmlNode::SelectSingleNode in sharp-runtime returns a node owned by the document despite an ownership comment that says otherwise. BitmapFontFileReader treats the returned pointer as non-owning. Check the current dependency implementation before changing that code.
  • CNA's classic Texture2D::FromStream accepts PNG, JPEG, and GIF. It rejects BMP even though its internal image decoder can parse BMP. Tilemap assets loaded through this public API should use one of the accepted formats; the tiled demo uses losslessly converted PNG assets.

The old MISSING.md account of render-target readback was corrected for current CNA. The current readback contract is documented in architecture.md.