Fix NC file loading freeze with vertex decimation and async chunked p…#6
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…rocessing Large G-code files with continuous A-axis rotation caused the UI to freeze because every line created a vertex even when X/Y/Z barely changed between lines, and all parsing happened synchronously on the main thread. Two fixes applied: 1. Vertex decimation: Skip vertices within 0.1mm of the previous one (sub-pixel at any zoom level). This dramatically reduces geometry size for A-axis rotation programs where thousands of lines produce nearly identical XYZ coordinates. Motion type transitions (G0↔G1) always keep both vertices to preserve color boundaries. 2. Async chunked processing: processGCodeAsync splits the G-code into 5000-line chunks with setTimeout(0) yields between them, keeping the loading spinner animated and the browser responsive. The result populates the same cache as the sync path, so GCodeToolpath's useMemo hits the cache instantly. https://claude.ai/code/session_01XToJJomq1oMrbTxNLuJDjV
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…rocessing
Large G-code files with continuous A-axis rotation caused the UI to freeze because every line created a vertex even when X/Y/Z barely changed between lines, and all parsing happened synchronously on the main thread.
Two fixes applied:
Vertex decimation: Skip vertices within 0.1mm of the previous one (sub-pixel at any zoom level). This dramatically reduces geometry size for A-axis rotation programs where thousands of lines produce nearly identical XYZ coordinates. Motion type transitions (G0↔G1) always keep both vertices to preserve color boundaries.
Async chunked processing: processGCodeAsync splits the G-code into 5000-line chunks with setTimeout(0) yields between them, keeping the loading spinner animated and the browser responsive. The result populates the same cache as the sync path, so GCodeToolpath's useMemo hits the cache instantly.
https://claude.ai/code/session_01XToJJomq1oMrbTxNLuJDjV