v1.4.4

attic/old_source/StarCircle.hpp

@@ -0,0 +1,64 @@
+#ifndef STAR_CIRCLE_HPP
+#define STAR_CIRCLE_HPP
+
+#include "StarVector.hpp"
+#include "StarLine.hpp"
+
+namespace Star {
+
+template<typename T>
+class Circle {
+public:
+  typedef Vector<T, 2> Vec2T;
+  typedef Line<T, 2> LineT;
+  Circle();
+  Circle(Vec2T const& pos, T radius);
+
+  bool intersects(Vec2T const& point);
+  Vec2T pointAtAngle(T angle);
+  T angleNearestTo(Vec2T const& point);
+  Vec2T pointNearestTo(Vec2T const& point);
+
+private:
+  T m_radius;
+  Vec2T m_position;
+};
+
+template<typename T>
+Circle<T>::Circle() 
+  : m_radius(0) { }
+
+template<typename T>
+Circle<T>::Circle(Vec2T const& pos, T radius) 
+  : m_radius(radius),
+    m_position(pos) { }
+
+template<typename T>
+bool Circle<T>::intersects(Vec2T const& point) {
+  T distSqu = (point - m_position).magnitudeSquared();
+  return distSqu <= m_radius * m_radius;
+}
+
+template<typename T>
+auto Circle<T>::pointAtAngle(T angle) -> Vec2T {
+  auto fromCenter = Vec2T::withAngle(angle, m_radius);
+  return fromCenter + m_position;
+}
+
+template<typename T>
+auto Circle<T>::angleNearestTo(Vec2T const& point) -> T {
+  return (point - m_position).angle();
+}
+
+template<typename T>
+auto Circle<T>::pointNearestTo(Vec2T const& point) -> Vec2T {
+  T angle = angleNearestTo(point);
+  return pointAtAngle(angle);
+}
+
+typedef Circle<float> CirF;
+typedef Circle<double> CirD;
+
+}
+
+#endif