PhysicsEngine.h

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#pragma once
 
#include <btBulletDynamicsCommon.h>
 
namespace EngineCore
{
    struct RigidBodyCreateInfo
    {
        glm::mat4 transform {1.0f};
        float mass = 1.0f;
        btCollisionShape* shape = nullptr;
        float friction = 0.5f;
        float restitution = 0.0f;
    };

    class PhysicsEngine
    {
    public:
        PhysicsEngine();
        ~PhysicsEngine();

        void onPhysicsComponentDestroyed( entt::registry & registry, entt::entity entity );

        void update(float deltaTimeSeconds);

        [[nodiscard]] btDiscreteDynamicsWorld * getDynamicsWorld() const;

        static btCollisionShape * createBoxShape(const glm::vec3& halfExtents);
        static btCollisionShape * createSphereShape(float radius);
        static btCollisionShape * createCapsuleShape(float radius, float height);
        static btCollisionShape * createPlaneShape(const glm::vec3& surfaceNormal, float distanceFromOrigin);

        [[nodiscard]] btRigidBody * createRigidBody(const RigidBodyCreateInfo& info ) const;

        void removeRigidBody(btRigidBody* body ) const;
 
    private:
        btBroadphaseInterface* broadphase;
        btCollisionConfiguration* collisionConfiguration;
        btCollisionDispatcher* dispatcher;
        btConstraintSolver* solver;
        btDiscreteDynamicsWorld* dynamicsWorld;
    };
}