Add basic lua 5.3 support

src/modules/physics/box2d/Fixture.cpp

@@ -263,7 +263,7 @@ int Fixture::rayCast(lua_State *L) const
 	float p2x = Physics::scaleDown((float)luaL_checknumber(L, 3));
 	float p2y = Physics::scaleDown((float)luaL_checknumber(L, 4));
 	float maxFraction = (float)luaL_checknumber(L, 5);
-	int childIndex = (int)luaL_optint(L, 6, 1) - 1; // Convert from 1-based index
+	int childIndex = (int) luaL_optnumber(L, 6, 1) - 1; // Convert from 1-based index
 	b2RayCastInput input;
 	input.p1.Set(p1x, p1y);
 	input.p2.Set(p2x, p2y);
@@ -279,7 +279,7 @@ int Fixture::rayCast(lua_State *L) const
 
 int Fixture::getBoundingBox(lua_State *L) const
 {
-	int childIndex = (int)luaL_optint(L, 1, 1) - 1; // Convert from 1-based index
+	int childIndex = (int) luaL_optnumber(L, 1, 1) - 1; // Convert from 1-based index
 	b2AABB box = fixture->GetAABB(childIndex);
 	box = Physics::scaleUp(box);
 	lua_pushnumber(L, box.lowerBound.x);

src/modules/physics/box2d/Physics.cpp

@@ -97,7 +97,7 @@ int Physics::newPolygonShape(lua_State *L)
 	bool istable = lua_istable(L, 1);
 
 	if (istable)
-		argc = (int) lua_objlen(L, 1);
+		argc = (int) luax_objlen(L, 1);
 
 	if (argc % 2 != 0)
 		return luaL_error(L, "Number of vertex components must be a multiple of two.");
@@ -158,7 +158,7 @@ int Physics::newChainShape(lua_State *L)
 	bool istable = lua_istable(L, 2);
 
 	if (istable)
-		argc = (int) lua_objlen(L, 2);
+		argc = (int) luax_objlen(L, 2);
 
 	if (argc % 2 != 0)
 		return luaL_error(L, "Number of vertex components must be a multiple of two.");

src/modules/physics/box2d/Shape.cpp

@@ -105,7 +105,7 @@ int Shape::rayCast(lua_State *L) const
 	float x = Physics::scaleDown((float)luaL_checknumber(L, 6));
 	float y = Physics::scaleDown((float)luaL_checknumber(L, 7));
 	float r = (float)luaL_checknumber(L, 8);
-	int childIndex = (int)luaL_optint(L, 9, 1) - 1; // Convert from 1-based index
+	int childIndex = (int) luaL_optnumber(L, 9, 1) - 1; // Convert from 1-based index
 	b2RayCastInput input;
 	input.p1.Set(p1x, p1y);
 	input.p2.Set(p2x, p2y);
@@ -125,7 +125,7 @@ int Shape::computeAABB(lua_State *L) const
 	float x = Physics::scaleDown((float)luaL_checknumber(L, 1));
 	float y = Physics::scaleDown((float)luaL_checknumber(L, 2));
 	float r = (float)luaL_checknumber(L, 3);
-	int childIndex = (int)luaL_optint(L, 4, 1) - 1; // Convert from 1-based index
+	int childIndex = (int) luaL_optnumber(L, 4, 1) - 1; // Convert from 1-based index
 	b2Transform transform(b2Vec2(x, y), b2Rot(r));
 	b2AABB box;
 	shape->ComputeAABB(&box, transform, childIndex);

src/modules/physics/box2d/wrap_ChainShape.cpp

@@ -55,7 +55,7 @@ int w_ChainShape_setPreviousVertex(lua_State *L)
 int w_ChainShape_getChildEdge(lua_State *L)
 {
 	ChainShape *c = luax_checkchainshape(L, 1);
-	int index = luaL_checkint(L, 2) - 1; // Convert from 1-based index
+	int index = (int) luaL_checknumber(L, 2) - 1; // Convert from 1-based index
 	EdgeShape *e = 0;
 	luax_catchexcept(L, [&](){ e = c->getChildEdge(index); });
 	luax_pushtype(L, PHYSICS_EDGE_SHAPE_ID, e);
@@ -74,7 +74,7 @@ int w_ChainShape_getVertexCount(lua_State *L)
 int w_ChainShape_getPoint(lua_State *L)
 {
 	ChainShape *c = luax_checkchainshape(L, 1);
-	int index = luaL_checkint(L, 2) - 1; // Convert from 1-based index
+	int index = (int) luaL_checknumber(L, 2) - 1; // Convert from 1-based index
 	b2Vec2 v;
 	luax_catchexcept(L, [&](){ v = c->getPoint(index); });
 	lua_pushnumber(L, v.x);

src/modules/physics/box2d/wrap_Fixture.cpp

@@ -165,9 +165,9 @@ int w_Fixture_setFilterData(lua_State *L)
 {
 	Fixture *t = luax_checkfixture(L, 1);
 	int v[3];
-	v[0] = luaL_checkint(L, 2);
-	v[1] = luaL_checkint(L, 3);
-	v[2] = luaL_checkint(L, 4);
+	v[0] = (int) luaL_checknumber(L, 2);
+	v[1] = (int) luaL_checknumber(L, 3);
+	v[2] = (int) luaL_checknumber(L, 4);
 	t->setFilterData(v);
 	return 0;
 }
@@ -250,7 +250,7 @@ int w_Fixture_getGroupIndex(lua_State *L)
 int w_Fixture_setGroupIndex(lua_State *L)
 {
 	Fixture *t = luax_checkfixture(L, 1);
-	int i = luaL_checkint(L, 2);
+	int i = (int) luaL_checknumber(L, 2);
 	t->setGroupIndex(i);
 	return 0;
 }

src/modules/physics/box2d/wrap_Physics.cpp

@@ -439,7 +439,7 @@ int w_getDistance(lua_State *L)
 
 int w_setMeter(lua_State *L)
 {
-	int arg1 = luaL_checkint(L, 1);
+	int arg1 = (int) luaL_checknumber(L, 1);
 	luax_catchexcept(L, [&](){ Physics::setMeter(arg1); });
 	return 0;