cpp-game-engine/math/include/game/math/shape.hpp

//
//  shape.hpp
//  math
//
//  Created by Sam Jaffe on 7/5/16.
//

#pragma once

#include "vector/vector.hpp"

#include "math_fwd.hpp"

namespace math { namespace dim2 {
  using point = vec2;

  struct line {
    float length() const;
    float slope() const;
    point first, second;
  };

  struct circle {
    point center;
    float radius;
  };

  struct triangle {
    point a, b, c;
  };

  struct quad {
    point ll, lr, ur, ul;
  };

  struct rectangle {
    operator quad() const;
    point origin, size;
  };

  struct square {
    operator rectangle() const;
    operator quad() const;
    point origin;
    float size;
  };
}}

namespace math { namespace shapes {
  std::vector<dim2::line> segments(dim2::quad const & shape);
}}

namespace math { namespace lines {
  bool parallel(dim2::line const & lhs, dim2::line const & rhs);
  dim2::point intersection(dim2::line const & lhs, dim2::line const & rhs);
  dim2::line orthogonal(dim2::line const & from, dim2::point const & to);
}}