API Reference > geometry-core > CartesianGeometry > Point3d > interpolatePointAndTangent interpolatePointAndTangent Method Return a ray whose ray.origin is interpolated, and ray.direction is the vector between points with a scale factor applied. interpolatePointAndTangent(fraction: number, other: Point3d, tangentScale: number, result?: Ray3d): Ray3d Parameter Type Description fraction number fractional position between points. other Point3d endpoint of interpolation tangentScale number scale factor to apply to the startToEnd vector result Ray3d optional receiver. Returns - Ray3d Defined in geometry3d/Point3dVector3d.ts Line 467 Last Updated: 11 June, 2024