Enum values
| Name | Value | Description |
|---|---|---|
| X | 0 | X coordinate of the sample point. |
| Y | 1 | Y coordinate of the sample point. |
| Z | 2 | Z coordinate of the sample point. |
| ArcLength | 3 | Arc-length from the start of the curve to the sample point. |
| Parameter | 4 | The curve parameter itself. |
| Distance | 5 | Straight-line distance from the sample point to the start of the curve. |
| Derivative | 6 | Magnitude of the first derivative of the curve (speed with respect to parameter). |
| Curvature | 7 | Magnitude of the curvature vector. |
| Torsion | 8 | Signed torsion of the curve at the sample point (rate of change of the binormal). Zero for planar curves. |