Method SampleGradient
| Edit this page View SourceSampleGradient(DistanceGrid, Vector3, bool)
Estimates the gradient of the signed distance field at a world-space position using central differences over one voxel step per axis.
Declaration
public static Vector3 SampleGradient(this DistanceGrid grid, Vector3 worldPos, bool clampToBounds = true)Parameters
| Type | Name | Description |
|---|---|---|
| DistanceGrid | grid | Distance grid to sample |
| Vector3 | worldPos | Query position in world space. |
| bool | clampToBounds | If true, samples outside the grid are clamped to the outermost valid cell; if false, an ArgumentOutOfRangeException is thrown when sampling out of bounds. |
Returns
| Type | Description |
|---|---|
| Vector3 | Gradient vector in world units (X,Y,Z). For a true SDF, normalizing this vector
yields the surface normal at |
Remarks
Uses trilinear samples per axis. Degenerate axes (dimension = 1) produce zero derivative on that axis. Result quality depends on grid resolution and SDF accuracy (it is an approximation of the mesh normal).