public java.awt.geom.GeneralPath appendPath(java.awt.geom.GeneralPath path) {
double cot = cos(theta);
double sit = sin(theta);
double cost, sint;
if (direct) {
// Counter-clockwise circle
for (double t = .1; t < PI * 2; t += .1) {
cost = cos(t);
sint = sin(t);
path.lineTo(
(float) (xc + r * cost * cot - r * sint * sit),
(float) (yc + r * cost * sit + r * sint * cot));
}
} else {
// Clockwise circle
for (double t = .1; t < PI * 2; t += .1) {
cost = cos(t);
sint = sin(t);
path.lineTo(
(float) (xc + r * cost * cot + r * sint * sit),
(float) (yc + r * cost * sit - r * sint * cot));
}
}
// line to first point
path.lineTo((float) (xc + r * cot), (float) (yc + r * sit));
return path;
}
public java.awt.geom.GeneralPath getGeneralPath() {
// create new path
java.awt.geom.GeneralPath path = new java.awt.geom.GeneralPath();
// move to the first point
Point2D point = this.firstPoint();
path.moveTo((float) point.x(), (float) point.y());
// append the curve
path = this.appendPath(path);
// return the final path
return path;
}
public java.awt.geom.GeneralPath appendPath(java.awt.geom.GeneralPath path) {
// number of curves to approximate the arc
int nSeg = (int) ceil(abs(angleExtent) / (PI / 2));
nSeg = min(nSeg, 4);
// angular extent of each curve
double ext = angleExtent / nSeg;
// compute coefficient
double k = btan(abs(ext));
for (int i = 0; i < nSeg; i++) {
// position of the two extremities
double ti0 = abs(i * ext);
double ti1 = abs((i + 1) * ext);
// extremity points
Point2D p1 = this.point(ti0);
Point2D p2 = this.point(ti1);
// tangent vectors, multiplied by appropriate coefficient
Vector2D v1 = this.tangent(ti0).times(k);
Vector2D v2 = this.tangent(ti1).times(k);
// append a cubic curve to the path
path.curveTo(
p1.x() + v1.x(), p1.y() + v1.y(), p2.x() - v2.x(), p2.y() - v2.y(), p2.x(), p2.y());
}
return path;
}