Add Curvature enum for index-based handle references (#1833) #3616
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…1833) This is the first step toward making SegmentDomain use handles from the Point table instead of storing coordinates inline. The Curvature enum describes segment curvature by referencing handle point indices in PointDomain, enabling: - Shared handle points across segments - Attribute-driven transformations - Future extensibility for Arc, NURBS, and other curve types Variants: - Linear: straight line between endpoints - Quadratic: single control point (index reference) - Cubic: two control points (index references) Includes unit tests for all methods.
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Summary
This PR adds the
Curvatureenum as the first step toward implementing #1833 (Make a shape's Segment table use handles from the Point table).Changes
The
Curvatureenum describes segment curvature by referencing handle point indices in PointDomain, replacing inline coordinate storage. This enables:Variants
Linear: straight line between endpointsQuadratic { handle: usize }: single control point (index reference)Cubic { handle_start: usize, handle_end: usize }: two control pointsTests
Added 7 unit tests covering all methods.
Related Issues
Closes part of #1833