SMLib Kernel Drop Curve

Use this skill when a 3D curve must be projected into surface UV space, a UV curve must lift back to 3D, or failures appear around seams, boundaries, trimming, or paired UV/3D outputs.

Purpose

Diagnose drop/projection failures where curves must be paired between 3D and surface UV space, especially around periodic seams, domain boundaries, trims, and tolerance-sensitive walking.

Prerequisites

• Identify the source curve, target surface, expected parameter range, and whether boundary trimming is expected.
• Record Surface.uv_domain(), periodicity, and representative start/end points before changing tolerances.
• Use usd-brep-test-selection for focused curve or trimming validation.

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