ContactCache.hpp

Go to the documentation of this file.

 
#pragma once
 
#include "ecs/physics/ContactManifold.hpp"
 
#include <cstdint>
#include <unordered_map>
 
namespace physics
{
 
class ContactCache
{
public:
    [[nodiscard]] static uint64_t pairKey(entt::entity a, entt::entity b) noexcept;

    ContactManifold& merge(const ContactManifold& incoming);

    void endFrame() noexcept;

    [[nodiscard]] auto begin() { return cache_.begin(); }
    [[nodiscard]] auto end() { return cache_.end(); }
    [[nodiscard]] auto begin() const { return cache_.begin(); }
    [[nodiscard]] auto end() const { return cache_.end(); }
    [[nodiscard]] size_t size() const noexcept { return cache_.size(); }
    void clear() noexcept;
 
private:
    struct Entry
    {
        ContactManifold manifold;
        uint32_t lastTouchedFrame = 0;
    };
 
    std::unordered_map<uint64_t, Entry> cache_;
    uint32_t currentFrame_ = 0;
};
 
} // namespace physics