API Reference > geometry-core > CartesianGeometry > UnionOfConvexClipPlaneSets > multiplyPlanesByMatrix4d multiplyPlanesByMatrix4d Method Multiply all ClipPlanes DPoint4d by matrix. multiplyPlanesByMatrix4d(matrix: Matrix4d, invert: boolean = true, transpose: boolean = true): boolean Parameter Type Description matrix Matrix4d matrix to apply. invert boolean if true, use in verse of the matrix. transpose boolean if true, use the transpose of the matrix (or inverse, per invert parameter)* Note that if matrixA is applied to all of space, the matrix to send to this method to get a corresponding effect on the plane is the inverse transpose of matrixA* Callers that will apply the same matrix to many planes should pre-invert the matrix for efficiency.* Both params default to true to get the full effect of transforming space. Returns - boolean Defined in clipping/UnionOfConvexClipPlaneSets.ts Line 270 Last Updated: 11 June, 2024