makePlaneProjection function

Matrix4 makePlaneProjection(
  1. Vector3 planeNormal,
  2. Vector3 planePoint
)

Returns a transformation matrix that transforms points onto the plane specified with planeNormal and planePoint.

Implementation

Matrix4 makePlaneProjection(Vector3 planeNormal, Vector3 planePoint) {
  final v = Vector4(
    planeNormal.storage[0],
    planeNormal.storage[1],
    planeNormal.storage[2],
    0.0,
  );
  final outer = Matrix4.outer(v, v);
  var r = Matrix4.zero();
  r = r - outer;
  final scaledNormal = planeNormal.scaled(dot3(planePoint, planeNormal));
  final T = Vector4(
    scaledNormal.storage[0],
    scaledNormal.storage[1],
    scaledNormal.storage[2],
    1.0,
  );
  r.setColumn(3, T);
  return r;
}