Carts: Get rid of animation hack

mods/carts/cart_entity.lua

@@ -6,10 +6,9 @@ local S = carts.get_translator
 local cart_entity = {
 	initial_properties = {
 		physical = false, -- otherwise going uphill breaks
-		collisionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
+		selectionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
 		visual = "mesh",
-		mesh = "carts_cart.b3d",
-		visual_size = {x=1, y=1},
+		mesh = "carts_cart.obj",
 		textures = {"carts_cart.png"},
 	},
 
@@ -352,15 +351,7 @@ local function rail_on_step(self, dtime)
 	elseif dir.z < 0 then
 		yaw = 1
 	end
-	self.object:set_yaw(yaw * math.pi)
-
-	local anim = {x=0, y=0}
-	if dir.y == -1 then
-		anim = {x=1, y=1}
-	elseif dir.y == 1 then
-		anim = {x=2, y=2}
-	end
-	self.object:set_animation(anim, 1, 0)
+	self.object:set_rotation(vector.new(math.sign(dir.y) * 0.25 * math.pi, yaw * math.pi, 0))
 
 	if update.vel then
 		self.object:set_velocity(vel)

mods/carts/models/carts_cart.obj

@@ -0,0 +1,80 @@
+# Blender v2.82 (sub 7) OBJ File: 'carts_cart.blend'
+# www.blender.org
+mtllib carts_cart.mtl
+o Cube
+v -5.000000 -5.000000 5.000000
+v -5.000000 -5.000000 -5.000000
+v 5.000000 -5.000000 -4.999999
+v 4.999998 -5.000000 5.000002
+v -5.000002 5.000000 4.999997
+v -4.999997 5.000000 -5.000003
+v 5.000002 5.000000 -4.999998
+v 5.000000 5.000000 5.000000
+v -4.324999 5.000000 -4.325001
+v -4.325000 -4.325000 -4.325000
+v 4.325001 5.000000 -4.325003
+v 4.324999 5.000000 4.324998
+v 4.325000 -4.325000 -4.325001
+v 4.325000 -4.325000 4.324999
+v -4.324998 5.000000 4.324999
+v -4.324999 -4.325000 4.325000
+vt 0.500000 -0.000000
+vt -0.000000 0.000000
+vt -0.000000 0.500000
+vt 0.500000 0.500000
+vt 1.000000 0.500000
+vt 0.500000 1.000000
+vt 1.000000 1.000000
+vt 0.500000 1.000000
+vt 0.500000 0.500000
+vt 1.000000 0.500000
+vt 1.000000 1.000000
+vt 0.500000 -0.000000
+vt 0.500000 0.500000
+vt 1.000000 0.500000
+vt 1.000000 0.000000
+vt 1.000000 0.500000
+vt 0.500000 0.500000
+vt 0.500000 -0.000000
+vt 1.000000 0.000000
+vt 0.031250 0.531250
+vt 0.031250 1.000000
+vt 0.468750 1.000000
+vt 0.468750 0.531250
+vt 0.031250 0.531250
+vt 0.031250 1.000000
+vt 0.468750 1.000000
+vt 0.468750 0.531250
+vt 0.468750 0.968750
+vt 0.031250 0.968750
+vt 0.031250 0.531250
+vt 0.468750 0.531250
+vt 0.468750 0.531250
+vt 0.031250 0.531250
+vt -0.000000 0.500000
+vt 0.500000 0.500000
+vt 0.468750 0.968750
+vt 0.000000 1.000000
+vt 0.031250 0.968750
+vn 0.0000 -1.0000 -0.0000
+vn -1.0000 0.0000 -0.0000
+vn 1.0000 -0.0000 0.0000
+vn -0.0000 0.0000 1.0000
+vn 0.0000 -0.0000 -1.0000
+vn 0.0000 1.0000 0.0000
+usemtl Material
+s off
+f 2/1/1 3/2/1 4/3/1 1/4/1
+f 2/5/2 1/4/2 5/6/2 6/7/2
+f 8/8/3 4/9/3 3/10/3 7/11/3
+f 4/12/4 8/13/4 5/14/4 1/15/4
+f 6/16/5 7/17/5 3/18/5 2/19/5
+f 14/20/2 12/21/2 11/22/2 13/23/2
+f 10/24/3 9/25/3 15/26/3 16/27/3
+f 16/28/6 14/29/6 13/30/6 10/31/6
+f 16/27/5 15/26/5 12/21/5 14/20/5
+f 9/25/4 10/24/4 13/23/4 11/22/4
+f 9/32/6 11/33/6 7/34/6 6/35/6
+f 9/32/6 6/35/6 5/6/6 15/36/6
+f 15/36/6 5/6/6 8/37/6 12/38/6
+f 12/38/6 8/37/6 7/34/6 11/33/6