Collider.hpp

Go to the documentation of this file.

 
#pragma once
 
#include <array>
 
#include "Manifold.hpp"
#include "Projection.hpp"
#include "Transform.hpp"
 
#include "math/Vector2.hpp"
 
namespace stw
{
class CircleCollider;
class BoxCollider;
class AabbCollider;
 
class Collider
{
  public:
    Collider() = default;
    Collider(Collider &&col) noexcept = default;
    virtual ~Collider() = default;
    Collider &operator=(Collider &&col) = default;
    Collider &operator=(const Collider &col) = default;
    Collider(const Collider &col) = default;
 
    Vector2 center{};
 
    virtual Manifold TestCollision(const Transform *transform, const Collider *collider,
                                   const Transform *colliderTransform) const = 0;
 
    virtual Manifold TestCollision(const Transform *transform, const BoxCollider *collider,
                                   const Transform *boxTransform) const = 0;
 
    virtual Manifold TestCollision(const Transform *transform, const CircleCollider *collider,
                                   const Transform *circleTransform) const = 0;
 
    virtual Manifold TestCollision(const Transform *transform, const AabbCollider *collider,
                                   const Transform *aabbTransform) const = 0;
 
    [[nodiscard]] virtual Vector2 FindFurthestPoint(const Transform *transform, const Vector2 &direction) const = 0;
 
    [[nodiscard]] virtual Vector2 GetBoundingBoxSize() const = 0;
};
 
class BoxCollider final : public Collider
{
  public:
    float halfWidth = 0;
    float halfHeight = 0;
 
    Manifold TestCollision(const Transform *transform, const Collider *collider,
                           const Transform *colliderTransform) const override;
 
    Manifold TestCollision(const Transform *transform, const BoxCollider *collider,
                           const Transform *boxTransform) const override;
 
    Manifold TestCollision(const Transform *transform, const CircleCollider *collider,
                           const Transform *circleTransform) const override;
 
    Manifold TestCollision(const Transform *transform, const AabbCollider *collider,
                           const Transform *circleTransform) const override;
 
    [[nodiscard]] Vector2 FindFurthestPoint(const Transform *transform, const Vector2 &direction) const override;
 
    [[nodiscard]] std::array<Vector2, 4> GetTransformedVertices(const Transform &transform) const;
 
    [[nodiscard]] std::array<Vector2, 4> GetVertices() const;
 
    [[nodiscard]] static Projection Project(const Vector2 &axis, const std::array<Vector2, 4> &vertices);
    [[nodiscard]] static std::array<Vector2, 4> GetAxes(const std::array<Vector2, 4> &vertices);
 
    [[nodiscard]] Vector2 GetBoundingBoxSize() const override;
};
 
class CircleCollider final : public Collider
{
  public:
    float radius = 0;
 
    CircleCollider() = default;
    CircleCollider(float radius);
 
    Manifold TestCollision(const Transform *transform, const Collider *collider,
                           const Transform *colliderTransform) const override;
 
    Manifold TestCollision(const Transform *transform, const BoxCollider *collider,
                           const Transform *boxTransform) const override;
 
    Manifold TestCollision(const Transform *transform, const CircleCollider *collider,
                           const Transform *circleTransform) const override;
 
    Manifold TestCollision(const Transform *transform, const AabbCollider *collider,
                           const Transform *aabbTransform) const override;
 
    [[nodiscard]] Vector2 FindFurthestPoint(const Transform *transform, const Vector2 &direction) const override;
    [[nodiscard]] Vector2 GetBoundingBoxSize() const override;
};
 
class AabbCollider final : public Collider
{
  public:
    float halfWidth = 0;
    float halfHeight = 0;
 
    Manifold TestCollision(const Transform *transform, const Collider *collider,
                           const Transform *colliderTransform) const override;
    Manifold TestCollision(const Transform *transform, const BoxCollider *collider,
                           const Transform *boxTransform) const override;
    Manifold TestCollision(const Transform *transform, const CircleCollider *collider,
                           const Transform *circleTransform) const override;
    Manifold TestCollision(const Transform *transform, const AabbCollider *collider,
                           const Transform *aabbTransform) const override;
    [[nodiscard]] Vector2 FindFurthestPoint(const Transform *transform, const Vector2 &direction) const override;
    [[nodiscard]] Vector2 GetBoundingBoxSize() const override;
};
} // namespace stw