1 files changed, 27 insertions, 0 deletions
diff --git a/kue/circle.h b/kue/circle.h
new file mode 100644
index 00000000..d412b41d
--- /dev/null
+++ b/kue/circle.h
@@ -0,0 +1,27 @@
+#ifndef _CIRCLE_H
+#define _CIRCLE_H
+
+#include "point.h"
+
+// Billards and pockets are both circles
+// The collison detection code likes to deal with circles, not billards and pockets
+
+class circle : public point {
+  public:
+	circle(double x, double y, double r) : point(x, y) { _radius = r; }
+	~circle() {}
+
+	// Accessors
+	double radius() { return _radius; }
+	void setRadius(double radius) { _radius = radius; }
+
+	// Returns true if we intersect the other circle
+	double intersects(const circle &other_circle) { return (distance(other_circle) - other_circle._radius) <= _radius; }
+	// Returns the distance from the edge of this circle to the edge of the other
+	double edgeDistance(const circle &other_circle) { return distance(other_circle) - _radius - other_circle._radius; }
+
+  protected:
+	double _radius;
+};
+
+#endif