/**
* Create a new ray by transforming the supplied one by the given matrix. If
* the matrix is <code>null</code>, the original ray is returned.
*
* @param m matrix to transform the ray by
*/
public Ray transform(Matrix4 m)
{
if (m == null)
return this;
Ray r = new Ray();
r.ox = m.transformPX(ox, oy, oz);
r.oy = m.transformPY(ox, oy, oz);
r.oz = m.transformPZ(ox, oy, oz);
r.dx = m.transformVX(dx, dy, dz);
r.dy = m.transformVY(dx, dy, dz);
r.dz = m.transformVZ(dx, dy, dz);
r.tMin = tMin;
r.tMax = tMax;
return r;
}
