Java Utililty Methods Angle from Point

List of utility methods to do Angle from Point

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Description

The list of methods to do Angle from Point are organized into topic(s).

Method

doublegetAngle(double originX, double originY, double x, double y)
The getAngle method returns the angle between (x, y) and (originX, originY). 
double adj = x - originX;
double opp = y - originY;
double rad = 0.0;
if (adj == 0) {
    if (opp == 0) {
        return 0.0;
    } else {
        rad = Math.PI / 2;
...
doublegetAngle(Point2D center, Point2D point)
get Angle 
return Math.atan2(-(point.getY() - center.getY()), point.getX() - center.getX());
doublegetAngle(Point2D origin, Point2D target)
get Angle 
double angle = Math.toDegrees(Math.atan2((origin.getY() - target.getY()), (target.getX() - origin.getX())));
if (angle < 0) {
    angle += 360;
return angle;
doublegetAngle(Point2D p1, Point2D p2)
get Angle 
if (p1.equals(p2)) {
    throw new IllegalArgumentException();
double a = -Math.atan2(p2.getY() - p1.getY(), p2.getX() - p1.getX());
a = a * 180.0 / Math.PI;
a -= 90;
if (a >= 360.0) {
    a -= 360.0;
...
doublegetAngle(Point2D startPosition, Point2D endPosition)
get Angle 
double deltaX = endPosition.getX() - startPosition.getX();
double deltaY = endPosition.getY() - startPosition.getY();
return Math.atan2(deltaY, deltaX);
doublegetAngle(Point2D.Double vertPt, Point2D.Double edgePt)
get Angle 
double dx = Math.abs(edgePt.x - vertPt.x), dy = Math.abs(edgePt.y - vertPt.y);
if (dx == 0.0D) {
    if (edgePt.y > vertPt.y)
        return Math.PI / 2.0D;
    else
        return 3 * Math.PI / 2.0D;
} else if (dy == 0.0D) {
    if (edgePt.x > vertPt.x)
...
doublegetAngleForPoint(Arc2D arc, int x, int y)
get Angle For Point 
double px = x - arc.getCenterX();
double py = arc.getCenterY() - y;
double d = Math.sqrt(px * px + py * py);
double a1 = Math.toDegrees(Math.acos(px / d));
double a2 = Math.toDegrees(Math.asin(py / d));
if (a2 < 0) {
    if (a1 > 90)
        return 360 - a1;
...