octantiterator.h

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#ifndef ROGUELIKE_ALG_LOS_OCTANTITERATOR_H_
#define ROGUELIKE_ALG_LOS_OCTANTITERATOR_H_

// Inheritance
// (none)

// External Dependencies
#include <ugdk/math/integer2D.h>

// Internal Dependencies
// (none)

// Forward Declarations
// (none)

namespace game {
namespace alg {
namespace los {

class OctantIterator {
  public:
    OctantIterator(double range_squared, const ugdk::math::Integer2D& start_offset )
      : range_squared_(range_squared), focus_(start_offset) {}
    ~OctantIterator() {}

    ugdk::math::Integer2D operator*() const { return focus_; }
    bool end() const { return focus_.x*focus_.x + focus_.y*focus_.y > range_squared_; }

    virtual OctantIterator& operator++() = 0;
    virtual void Reset() = 0;
    virtual bool FocusIsControlTile() const = 0;

  protected:
    double range_squared_;
    ugdk::math::Integer2D focus_;
};

} // namespace los
} // namespace alg
} // namespace game

#endif // ROGUELIKE_ALG_LOS_OCTANTITERATOR_H_