startPointAndDerivative Method
Return the start point and derivative of the first child of the curve chain.
- For queries interior to the chain, use fractionToPointAndDerivative.
startPointAndDerivative(result?: Ray3d): undefined | Ray3d
| Parameter | Type | Description |
|---|---|---|
| result | Ray3d |
Returns - undefined | Ray3d
Defined in
- curve/CurveCollection.ts Line 390
Last Updated: 27 June, 2025
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