use mesh node for Air conditioner

(to get rid of the "metal" top face where there should be glass)

homedecor/climate-control.lua

@@ -4,21 +4,13 @@ local S = homedecor.gettext
 
 homedecor.register("air_conditioner", {
 	description = S("Air Conditioner"),
-	tiles = { 'homedecor_ac_tb.png',
+	mesh = "homedecor_ac.obj",
-		  'homedecor_ac_tb.png',
+	tiles = {
-		  'homedecor_ac_sides.png',
+		"homedecor_ac.png",
-		  'homedecor_ac_sides.png',
+		"default_glass.png"
-		  'homedecor_ac_back.png',
+	},
-		  'homedecor_ac_front.png'},
 	groups = { snappy = 3 },
 	sounds = default.node_sound_leaves_defaults(),
-	node_box = {
-		type = "fixed",
-		fixed = {
-			{-0.5, -0.5, -0.5, 0.5, 0.124, 0.5 }, -- off by just a tad to force the adjoining faces to be drawn.
-			{-0.5, 0.125, -0.5, 0.5, 0.5, 0.5 },
-		}
-	},
 	selection_box = { type="regular" },
 })
 

homedecor/models/homedecor_ac.obj

@@ -0,0 +1,75 @@
+# Blender v2.73 (sub 0) OBJ File: 'ac.blend'
+# www.blender.org
+o Cylinder
+v -0.500000 -0.500000 0.500000
+v -0.500000 -0.500000 -0.500000
+v 0.500000 -0.500000 -0.500000
+v 0.500000 -0.500000 0.500000
+v -0.500000 0.125000 0.500000
+v -0.500000 0.125000 -0.500000
+v 0.500000 0.125000 -0.500000
+v 0.500000 0.125000 0.500000
+v -0.500000 0.125001 0.500000
+v -0.500000 0.125001 -0.500000
+v 0.500000 0.125001 -0.500000
+v 0.500000 0.125001 0.500000
+v -0.500000 0.500000 0.500000
+v -0.500000 0.500000 -0.500000
+v 0.500000 0.500000 -0.500000
+v 0.500000 0.500000 0.500000
+v -0.500000 0.374999 0.500000
+v -0.500000 0.250001 -0.500000
+v 0.500000 0.250001 -0.500000
+v 0.500000 0.250001 0.500000
+v -0.500000 0.250001 0.500000
+v -0.500000 0.374999 -0.500000
+v 0.500000 0.374999 -0.500000
+v 0.500000 0.374999 0.500000
+vt 1.000000 1.000000
+vt 0.500000 1.000000
+vt 0.500000 0.687500
+vt 1.000000 0.687500
+vt 0.000000 1.000000
+vt 0.000000 0.687500
+vt 0.500000 0.375000
+vt 1.000000 0.375000
+vt 0.000000 0.187500
+vt 0.500000 0.187500
+vt 1.000000 0.125000
+vt 0.000000 0.125000
+vt 0.000000 0.000000
+vt 1.000000 0.000000
+vt -0.000000 0.750000
+vt -0.000000 0.625000
+vt 1.000000 0.625000
+vt 1.000000 0.750000
+vt -0.000000 0.875000
+vt 1.000000 0.875000
+vn -1.000000 0.000000 0.000000
+vn 0.000000 0.000000 -1.000000
+vn 1.000000 0.000000 0.000000
+vn 0.000000 0.000000 1.000000
+vn 0.000000 -1.000000 0.000000
+vn 0.000000 1.000000 0.000000
+g Cylinder_Cylinder_main
+s off
+f 5/1/1 6/2/1 2/3/1 1/4/1
+f 6/2/2 7/5/2 3/6/2 2/3/2
+f 7/1/3 8/2/3 4/3/3 3/4/3
+f 8/4/4 5/3/4 1/7/4 4/8/4
+f 1/6/5 2/9/5 3/10/5 4/3/5
+f 8/10/6 7/3/6 6/6/6 5/9/6
+g Cylinder_Cylinder_glass-tb
+f 21/11/1 18/12/1 10/13/1 9/14/1
+f 18/11/2 19/12/2 11/13/2 10/14/2
+f 19/11/3 20/12/3 12/13/3 11/14/3
+f 20/11/4 21/12/4 9/13/4 12/14/4
+f 16/13/6 15/14/6 14/1/6 13/5/6
+f 24/15/3 20/16/3 19/17/3 23/18/3
+f 23/15/2 19/16/2 18/17/2 22/18/2
+f 22/15/1 18/16/1 21/17/1 17/18/1
+f 13/1/1 14/5/1 22/19/1 17/20/1
+f 14/1/2 15/5/2 23/19/2 22/20/2
+f 15/1/3 16/5/3 24/19/3 23/20/3
+f 16/1/4 13/5/4 17/19/4 24/20/4
+f 21/16/4 20/17/4 24/18/4 17/15/4