private PPath redrawArrows(double... curve) {
double[] sub = subdivide(curve, ARROW_LENGTH);
double x1 = sub[0];
double y1 = sub[1];
double x4 = sub[6];
double y4 = sub[7];
Point2D e = makeDistanceFromOrigin(x1 - x4, y1 - y4, ARROW_LENGTH);
x1 = x4 + e.getX();
y1 = y4 + e.getY();
// arrow tails
double m = (y4 - y1) / (x4 - x1);
double at_x1 = x1 + m * ARROW_WIDTH / Math.sqrt(m * m + 1);
double at_y1 = y1 - ARROW_WIDTH / Math.sqrt(m * m + 1);
double at_x2 = x1 - m * ARROW_WIDTH / Math.sqrt(m * m + 1);
double at_y2 = y1 + ARROW_WIDTH / Math.sqrt(m * m + 1);
a1.reset();
a1.moveTo((float) at_x1, (float) at_y1);
a1.lineTo((float) at_x2, (float) at_y2);
a1.lineTo((float) x4, (float) y4);
a1.lineTo((float) at_x1, (float) at_y1);
return a1;
}
private void redrawAll() {
l1.setOffset(h1.getXOffset() + h1.getWidth() / 2, l1.getYOffset());
l2.setOffset(h2.getXOffset() + h2.getWidth() / 2, l2.getYOffset());
n1.setOffset(h1.getXOffset(), n1.getYOffset());
n2.setOffset(h2.getXOffset(), n2.getYOffset());
Point2D c1 = n1.getFullBounds().getCenter2D();
Point2D c2 = n2.getFullBounds().getCenter2D();
double dist = Math.abs(n2.getXOffset() - N - n1.getXOffset());
double t = dist < F ? dist / F : 1;
Point2D t1 = translate(rotate(new Point2D.Double(R[0] * (1 - t), 0), -A[0]), c1);
Point2D t2 = translate(rotate(new Point2D.Double(R[1], 0), -A[1]), clipX(c2, c1));
t2 =
translate(
makeDistanceFromOrigin(
t2.getX() - c1.getX(), t2.getY() - c1.getY(), dist(t2, c1) * (1 - t)),
c1);
k1.centerBoundsOnPoint(t1.getX(), t1.getY());
k2.centerBoundsOnPoint(t2.getX(), t2.getY());
arc.reset();
arc.moveTo((float) c1.getX(), (float) c1.getY());
arc.curveTo(
(float) t1.getX(), (float) t1.getY(),
(float) t2.getX(), (float) t2.getY(),
(float) c2.getX(), (float) c2.getY());
redrawArrows(
c1.getX(), c1.getY(),
t1.getX(), t1.getY(),
t2.getX(), t2.getY(),
c2.getX(), c2.getY());
}