Source

selove / src / modules / physics / box2d / wrap_Joint.cpp

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/**
* Copyright (c) 2006-2012 LOVE Development Team
*
* This software is provided 'as-is', without any express or implied
* warranty.  In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
*    claim that you wrote the original software. If you use this software
*    in a product, an acknowledgment in the product documentation would be
*    appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
*    misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
**/

// LOVE
#include "wrap_Joint.h"
#include <common/StringMap.h>

namespace love
{
namespace physics
{
namespace box2d
{
	Joint * luax_checkjoint(lua_State * L, int idx)
	{
		Joint * t = luax_checktype<Joint>(L, idx, "Joint", PHYSICS_JOINT_T);
		if (!t->isValid())
			luaL_error(L, "Attempt to use destroyed joint.");
		return t;
	}

	int w_Joint_getType(lua_State * L)
	{
		Joint * t = luax_checkjoint(L, 1);
		const char * type = "";
		Joint::getConstant(t->getType(), type);
		lua_pushstring(L, type);
		return 1;
	}

	int w_Joint_getAnchors(lua_State * L)
	{
		Joint * t = luax_checkjoint(L, 1);
		lua_remove(L, 1);
		return t->getAnchors(L);
	}

	int w_Joint_getReactionForce(lua_State * L)
	{
		Joint * t = luax_checkjoint(L, 1);
		lua_remove(L, 1);
		return t->getReactionForce(L);
	}

	int w_Joint_getReactionTorque(lua_State * L)
	{
		Joint * t = luax_checkjoint(L, 1);
		float inv_dt = (float)luaL_checknumber(L, 2);
		lua_pushnumber(L, t->getReactionTorque(inv_dt));
		return 1;
	}

	int w_Joint_getCollideConnected(lua_State * L)
	{
		Joint * t = luax_checkjoint(L, 1);
		luax_pushboolean(L, t->getCollideConnected());
		return 1;
	}

	int w_Joint_destroy(lua_State * L)
	{
		Joint * t = luax_checkjoint(L, 1);
		try
		{
			t->destroyJoint();
		}
		catch (love::Exception & e)
		{
			luaL_error(L, "%s", e.what());
		}
		return 0;
	}

	static const luaL_Reg functions[] = {
		{ "getType", w_Joint_getType },
		{ "getAnchors", w_Joint_getAnchors },
		{ "getReactionForce", w_Joint_getReactionForce },
		{ "getReactionTorque", w_Joint_getReactionTorque },
		{ "getCollideConnected", w_Joint_getCollideConnected },
		{ "destroy", w_Joint_destroy },
		{ 0, 0 }
	};

	extern "C" int luaopen_joint(lua_State * L)
	{
		return luax_register_type(L, "Joint", functions);
	}

} // box2d
} // physics
} // love