Geometry

Implementations of geometry algorithms in Java.

Usage

// Basics
int angle = Angle.getDegrees(0, 0, 100, 100);
System.out.println("Angle.getDegrees: " + angle);

angle = Angle.getAngularDistanceByRotatingCounterclockwise(angle, 0);
System.out.println("Angle.getAngularDistanceByRotatingCounterclockwise: " + angle);

long p = Point.rotateCounterclockwise(0, 0, 100, 100, angle);
System.out.println("Point.rotateCounterclockwise: " + Point.getX(p) + "-" + Point.getY(p));

// Point
boolean b = Point.isInsideCircle(0, 0, 100, 50, 50);
System.out.println("Point.isInsideCircle: " + b);

b = Point.isInsideRectangle(0, 0, 200, 100, 45, 10, 10);
System.out.println("Point.isInsideRectangle: " + b);

b = Point.isInsidePolygon(new int[] {-50, 50, 0}, new int[] {0, 0, 100}, 10, 10);
System.out.println("Point.isInsidePolygon: " + b);

// Circle
b = Circle.intersectsCircle(0, 0, 10, 30, 0, 20);
System.out.println("Circle.intersectsCircle: " + b);

b = Circle.intersectsRectangle(0, 0, 100, 50, 45, 10, 10, 50);
System.out.println("Circle.intersectsRectangle: " + b);

// Polygon
Polygon polygon =
    Polygon.from(new int[] {0, 50, 100, 0, -100, -50}, new int[] {0, -50, 0, 50, 0, -50});
b = polygon.intersectsCircle(0, 0, 45, 0, 0, 10);
System.out.println("Polygon.intersectsCircle: " + b);

// For more details, see APIs, tests and visual demos

Screenshots

Point.isInsideRectangle

Point.isInsidePolygon

Circle.intersectsRectangle

Polygon.intersectsCircle