public void appendShape(GeneralPath gp, DrawAreaInterface da, UserFunction own)
throws MathException {
AffPoint s, e;
s = (AffPoint) ((UserFunction) startPoint).eval();
e = (AffPoint) ((UserFunction) endPoint).eval();
gp.append(
new Line2D.Double(
da.xCoordToPix(s.evalX()),
da.yCoordToPix(s.evalY()),
da.xCoordToPix(e.evalX()),
da.yCoordToPix(e.evalY())),
true);
}
public void paintGraph(Graphics gr, DrawAreaInterface da) {
if (!isVisible()) return;
Color ca = gr.getColor();
Graphics2D g = (Graphics2D) gr;
Stroke strokeOld = g.getStroke();
g.setColor(getColor());
g.setStroke(AbstractGraph.getStroke(da.getStroke(), getLineStyle()));
evalFunction();
paint(g, da);
g.setColor(ca);
g.setStroke(strokeOld);
} // paintGraph
