/*************************************************************************/
/*  godot_collision_configuration.cpp                                    */
/*  Author: AndreaCatania                                                */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
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/*************************************************************************/

#include "godot_collision_configuration.h"
#include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h"
#include "BulletDynamics/Dynamics/btDiscreteDynamicsWorld.h"
#include "godot_ray_world_algorithm.h"

GodotCollisionConfiguration::GodotCollisionConfiguration(const btDiscreteDynamicsWorld *world, const btDefaultCollisionConstructionInfo &constructionInfo) :
		btDefaultCollisionConfiguration(constructionInfo) {

	void *mem = NULL;

	mem = btAlignedAlloc(sizeof(GodotRayWorldAlgorithm::CreateFunc), 16);
	m_rayWorldCF = new (mem) GodotRayWorldAlgorithm::CreateFunc(world);

	mem = btAlignedAlloc(sizeof(GodotRayWorldAlgorithm::SwappedCreateFunc), 16);
	m_swappedRayWorldCF = new (mem) GodotRayWorldAlgorithm::SwappedCreateFunc(world);
}

GodotCollisionConfiguration::~GodotCollisionConfiguration() {
	m_rayWorldCF->~btCollisionAlgorithmCreateFunc();
	btAlignedFree(m_rayWorldCF);

	m_swappedRayWorldCF->~btCollisionAlgorithmCreateFunc();
	btAlignedFree(m_swappedRayWorldCF);
}

btCollisionAlgorithmCreateFunc *GodotCollisionConfiguration::getCollisionAlgorithmCreateFunc(int proxyType0, int proxyType1) {

	if (CUSTOM_CONVEX_SHAPE_TYPE == proxyType0 && CUSTOM_CONVEX_SHAPE_TYPE == proxyType1) {

		// This collision is not supported
		return m_emptyCreateFunc;
	} else if (CUSTOM_CONVEX_SHAPE_TYPE == proxyType0) {

		return m_rayWorldCF;
	} else if (CUSTOM_CONVEX_SHAPE_TYPE == proxyType1) {

		return m_swappedRayWorldCF;
	} else {

		return btDefaultCollisionConfiguration::getCollisionAlgorithmCreateFunc(proxyType0, proxyType1);
	}
}

btCollisionAlgorithmCreateFunc *GodotCollisionConfiguration::getClosestPointsAlgorithmCreateFunc(int proxyType0, int proxyType1) {

	if (CUSTOM_CONVEX_SHAPE_TYPE == proxyType0 && CUSTOM_CONVEX_SHAPE_TYPE == proxyType1) {

		// This collision is not supported
		return m_emptyCreateFunc;
	} else if (CUSTOM_CONVEX_SHAPE_TYPE == proxyType0) {

		return m_rayWorldCF;
	} else if (CUSTOM_CONVEX_SHAPE_TYPE == proxyType1) {

		return m_swappedRayWorldCF;
	} else {

		return btDefaultCollisionConfiguration::getClosestPointsAlgorithmCreateFunc(proxyType0, proxyType1);
	}
}