/*
* (non-Javadoc)
*
* @see math.geom2d.Curve2D#position(math.geom2d.Point2D)
*/
public double position(Point2D point) {
double angle = Angle2D.horizontalAngle(ellipse.center(), point);
if (this.containsAngle(angle))
if (angleExtent > 0) return Angle2D.formatAngle(angle - startAngle);
else return Angle2D.formatAngle(startAngle - angle);
// If the point is not contained in the arc, return NaN.
return Double.NaN;
}
@Override
public String toString() {
Point2D center = ellipse.center();
return String.format(
Locale.US,
"EllipseArc2D(%7.2f,%7.2f,%7.2f,%7.2f,%7.5f,%7.5f,%7.5f)",
center.x(),
center.y(),
ellipse.r1,
ellipse.r2,
ellipse.theta,
startAngle,
angleExtent);
}
public Box2D boundingBox() {
// first get ending points
Point2D p0 = firstPoint();
Point2D p1 = lastPoint();
// get coordinate of ending points
double x0 = p0.x();
double y0 = p0.y();
double x1 = p1.x();
double y1 = p1.y();
// initialize min and max coords
double xmin = min(x0, x1);
double xmax = max(x0, x1);
double ymin = min(y0, y1);
double ymax = max(y0, y1);
// precomputes some values
Point2D center = ellipse.center();
double xc = center.x();
double yc = center.y();
double endAngle = startAngle + angleExtent;
boolean direct = angleExtent >= 0;
// check cases arc contains one maximum
if (Angle2D.containsAngle(startAngle, endAngle, PI / 2 + ellipse.theta, direct))
ymax = max(ymax, yc + ellipse.r1);
if (Angle2D.containsAngle(startAngle, endAngle, 3 * PI / 2 + ellipse.theta, direct))
ymin = min(ymin, yc - ellipse.r1);
if (Angle2D.containsAngle(startAngle, endAngle, ellipse.theta, direct))
xmax = max(xmax, xc + ellipse.r2);
if (Angle2D.containsAngle(startAngle, endAngle, PI + ellipse.theta, direct))
xmin = min(xmin, xc - ellipse.r2);
// return a bounding with computed limits
return new Box2D(xmin, xmax, ymin, ymax);
}
