API Reference > geometry-core > Curve > CurvePrimitive > isInPlane isInPlane MethodAbstract Ask if the curve is within tolerance of a plane. isInPlane(plane: Plane3dByOriginAndUnitNormal): boolean Parameter Type Description plane Plane3dByOriginAndUnitNormal Returns - boolean Returns true if the curve is completely within tolerance of the plane. Defined in core/geometry/src/curve/CurvePrimitive.ts Line 486 Last Updated: 13 June, 2024