Add 3MF file format support (#60)#81
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- STACK.md - Technologies and dependencies - ARCHITECTURE.md - System design and patterns - STRUCTURE.md - Directory layout - CONVENTIONS.md - Code style and patterns - TESTING.md - Test structure - INTEGRATIONS.md - External services - CONCERNS.md - Technical debt and issues
- Add ObjParser for parsing Wavefront OBJ files - Create unified MeshImporter that handles STL and OBJ formats - Update Constants to support multiple file patterns (*.stl, *.obj) - Update IFileSystem/FolderFileSystem to support multiple patterns - Update Library and ViewPort to use new MeshImporter OBJ parser supports: - Vertex positions (v) - Vertex normals (vn) - Face definitions with various formats (f v, f v/vt, f v/vt/vn, f v//vn) - Polygon triangulation (fan triangulation for n-gons) - Coordinate system conversion (right-handed to Unity's left-handed) Co-Authored-By: Claude Opus 4.5 <[email protected]>
- Add ThreeMfParser for parsing 3D Manufacturing Format files - Update MeshImporter to handle .3mf extension - Add *.3mf to SupportedFilePatterns 3MF parser features: - Reads ZIP-based 3MF archives - Parses XML model data from 3D/3dmodel.model - Extracts vertices and triangles from all mesh objects - Combines multiple meshes into single model (simplest approach) - Handles namespaced and non-namespaced XML variants - Converts coordinate system (right-handed to Unity left-handed) Design decision: Single 3MF file = single combined model This matches the existing behavior where one file = one library entry. Co-Authored-By: Claude Opus 4.5 <[email protected]>
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Summary
Note: This PR depends on #80 (OBJ import) for the shared
MeshImporterinfrastructure.Changes
Assets/Scripts/Util/Mesh/ThreeMfParser.cs- Parses 3MF formatMeshImporter.cs- Added.3mfextension handlingConstants.cs- Added*.3mfto supported patterns3MF Parser Features
3D/3dmodel.modelDesign Decision
Single 3MF file = single combined model
The issue notes that 3MF can contain multiple models with transformations. For this initial implementation, I chose the simplest approach:
Future enhancements could add:
Test plan
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