called internally by blank2dtrace to update the internal variables for computing offsets . concode_field_sep boolean _redraw concode_elem_sep PImage _traceImg concode_elem_sep PApplet _parent concode_elem_sep PGraphics canvas concode_elem_sep IGraph2D _graphDrawable concode_elem_sep PlotRenderer _prenderer concode_elem_sep float _offx concode_elem_sep float _offy concode_elem_sep String _renderer concode_elem_sep Axis2D _x concode_elem_sep Axis2D _y concode_elem_sep PGraphics _backBuffer concode_field_sep void setGraph concode_elem_sep void onRemoveTrace concode_elem_sep IGraph2D getGraph concode_elem_sep void setRenderer concode_elem_sep void onAddTrace concode_elem_sep float valToY concode_elem_sep float valToX concode_elem_sep void draw concode_elem_sep void setParent concode_elem_sep void generate concode_elem_sep void setPosition concode_elem_sep void TraceDraw
void function ( ) { _offx = _x . valueToPosition ( 0 ) ; _offy = _y . valueToPosition ( 0 ) ; }