Epic 147E: preserve LAS color in COPC→3D Tiles export - #105
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extract_rgb reads the cloud's u16 red/green/blue fields and shifts each channel right by eight bits into the interleaved 8-bit RGB the pnts feature table expects, when the source COPC carries color. Add a color-bearing COPC round-trip test.
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Summary
Extends the bounded COPC → 3D Tiles exporter to preserve LAS color.
Changes
export_copc_tilesetnow extractsu16red/green/blue fields from each COPC node's cloud and shifts each channel right by eight bits into the interleaved 8-bit RGB that thepntsfeature table requires.point_count * 3RGB bytes.Verification
cargo test -p spatialrust-interchange --features tiles3d-copc— 23 tests-D warningsclean;cargo fmt --all --checkclean