CollisionHandler.h

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#pragma once
 
 
#include "ColliderComponent.h"
#include "Constants.h"
#include "Entity.h"
#include "SDL_rect.h"
#include "SpriteComponent.h"
#include "Vector2D.h"
#include "Manager.h"
 
#include <bitset>
#include <initializer_list>
#include <tuple>
#include <utility>
#include <vector>
 
class ColliderComponent;
class Entity;
 
// [IntersectionBitSet]
constexpr uint8_t DIRECTION_C = 4;
 
using IntersectionBitSet = std::bitset<DIRECTION_C>;
// [IntersectionBitSet]
 
class CollisionHandler
{
private:
    Manager& manager;
 
public:
 
    CollisionHandler(Manager& mManager) :
        manager(mManager) { };
    ~CollisionHandler();
 
    static IntersectionBitSet getIntersection( // intersections relative to entityA
        Entity* entityA,
        Entity* entityB,
        Vector2D posModA = Vector2D(0,0),
        Vector2D posModB = Vector2D(0,0));
    static IntersectionBitSet getIntersectionWithBounds( // will fail to determine direction if speed high enough to switch from no collision to full overlap in one tick
        Entity* entity,
        Vector2D posMod = Vector2D(0,0));
 
    // temporary function, remove once game.cpp cleaned up
    std::vector<ColliderComponent*> getColliders(
        std::initializer_list<Entity::GroupLabel> const& groupLabels,
        std::initializer_list<Entity*> const& excludedEntities = {});
 
    template<typename T>
    T getAnyIntersection(
        Entity* entity,
        Vector2D posMod = {},
        std::initializer_list<Entity::GroupLabel> const& groupLabels = {},
        std::initializer_list<Entity*> const& excludedEntities = {});
 
    void update();
};