collider.hpp

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#pragma once
 
#include <flecs.h>
 
#include <memory>
#include <optional>
#include <wren/math/vector.hpp>
#include <wren/scene/components/transform.hpp>
 
#include "../components.hpp"
 
namespace wren::scene::components {
 
struct Collider : public Base {
  using Ptr = std::shared_ptr<Collider>;
 
  [[nodiscard]] virtual auto raycast(const Transform& transform,
                                     const math::Vec3f& origin,
                                     const math::Vec3f& direction) const
      -> std::optional<math::Vec3f> = 0;
};
 
struct BoxCollider2D : public Collider {
  static void init(const flecs::world& world) {
    static bool inited = false;
    if (!inited) {
      inited = true;
      world.component<BoxCollider2D::Ptr>().is_a<Collider>();
    }
  }
 
  [[nodiscard]] auto raycast(const Transform& transform,
                             const math::Vec3f& origin,
                             const math::Vec3f& direction) const
      -> std::optional<math::Vec3f> override;
 
  math::Vec2f size;
};
 
}  // namespace wren::scene::components