API Reference > geometry-core > CartesianGeometry > Ray3d > intersectionWithPlane intersectionWithPlane Method Return the intersection of the unbounded ray with a plane. Stores the point of intersection in the result point given as a parameter, and returns the parameter along the ray where the intersection occurs. Returns undefined if the ray and plane are parallel. intersectionWithPlane(plane: Plane3dByOriginAndUnitNormal, result?: Point3d): number | undefined Parameter Type Description plane Plane3dByOriginAndUnitNormal result Point3d Returns - number | undefined Defined in core/geometry/src/geometry3d/Ray3d.ts Line 261 Last Updated: 13 June, 2024