Set the upper 4x3 submatrix of this {@link Matrix4d} to the given {@link Matrix4x3d} and don't change the other elements.
@see Matrix4x3d#get(Matrix4d)
@param mat the {@link Matrix4x3d} @return this
See Implementation
Set the upper 4x3 submatrix of this {@link Matrix4d} to the given {@link Matrix4x3d} and don't change the other elements.
@see Matrix4x3d#get(Matrix4d)
@param mat the {@link Matrix4x3d} @return this