code: public void setTranslation(double x, double y, double z) {
  		this.m03 = x;
  		this.m13 = y;
  		this.m23 = z;
  	}
docs: Set the position.
  <p>
  This function changes only the elements of
  the matrix related to the translation.
  The scaling and the shearing are not changed.
  <p>
  After a call to this function, the matrix will
  contains (? means any value):
  <pre>
  [   ?    ?    x   ]
  [   ?    ?    y   ]
  [   ?    ?    z   ]
  [   ?    ?    ?   ]
  </pre>
  
  @param x
  @param y
  @param z
  @see #makeTranslationMatrix(double, double, double)