toReversedProjectionMatrix method

void toReversedProjectionMatrix(Matrix4 projectionMatrix)

Implementation

void toReversedProjectionMatrix(Matrix4 projectionMatrix ) {
  final m = projectionMatrix.storage;
  final isPerspectiveMatrix = m[ 11 ] == - 1;

  // Reverse [0, 1] projection matrix
  if ( isPerspectiveMatrix ) {
    m[ 10 ] = - m[ 10 ] - 1;
    m[ 14 ] = - m[ 14 ];
  }
  else {
    m[ 10 ] = - m[ 10 ];
    m[ 14 ] = - m[ 14 ] + 1;
  }
}