use mesh nodes for chainlink and barbed wire fences and corners

(so that I can give them custom collision boxes)

homedecor/fences.lua

@@ -184,43 +184,27 @@ homedecor.register("fence_privacy_corner", {
 
 homedecor.register("fence_barbed_wire", {
 	description = S("Barbed Wire Fence"),
+	mesh = "homedecor_fence_barbed_wire.obj",
 	tiles = {"homedecor_fence_barbed_wire.png"},
 	groups = {snappy=3},
 	sounds = default.node_sound_wood_defaults(),
 	selection_box = homedecor.nodebox.slab_z(-0.125),
-	node_box = {
+	collision_box = homedecor.nodebox.slab_z(-0.125),
-		type = "fixed",
-		fixed = {
-			{ -8/16, -8/16, 6/16, -6/16, 8/16, 8/16 },	-- left post
-			{  6/16, -8/16, 6/16,  8/16, 8/16, 8/16 }, 	-- right post
-			{ -6/16, -8/16, 7/16,  6/16, 8/16, 7/16 }	-- the wire
-		}
-	},
 })
 
 homedecor.register("fence_barbed_wire_corner", {
 	description = S("Barbed Wire Fence Corner"),
-	tiles = {
+	mesh = "homedecor_fence_barbed_wire_corner.obj",
-		"homedecor_fence_barbed_wire.png"
+	tiles = { "homedecor_fence_barbed_wire.png" },
-	},
 	groups = {snappy=3},
 	sounds = default.node_sound_wood_defaults(),
 	selection_box = homedecor.nodebox.corner_xz(0.125, -0.125),
-	node_box = {
+	collision_box = homedecor.nodebox.corner_xz(0.125, -0.125),
-		type = "fixed",
-		fixed = {
-			{ -8/16, -8/16,  6/16, -6/16, 8/16,  8/16 },	-- left post
-			{  6/16, -8/16,  6/16,  8/16, 8/16,  8/16 }, 	-- right post
-			{ -6/16, -8/16,  7/16,  6/16, 8/16,  7/16 },	-- the wire
-
-			{  -8/16, -8/16, -8/16, -6/16, 8/16, -6/16 },	-- front post
-			{  -7/16, -8/16, -6/16, -7/16, 8/16,  6/16 }	-- more wire
-		}
-	},
 })
 
 homedecor.register("fence_chainlink", {
 	description = S("Chainlink Fence"),
+	mesh="homedecor_fence_chainlink.obj",
 	tiles = {
 		"homedecor_fence_chainlink_tb.png",
 		"homedecor_fence_chainlink_tb.png",
@@ -232,20 +216,13 @@ homedecor.register("fence_chainlink", {
 	groups = {snappy=3},
 	sounds = default.node_sound_wood_defaults(),
 	selection_box = homedecor.nodebox.slab_z(-0.125),
-	node_box = {
+	collision_box = homedecor.nodebox.slab_z(-0.125),
-		type = "fixed",
-		fixed = {
-			{ -8/16, -8/16,  6/16, -7/16,  8/16,  8/16 },	-- left post
-			{  7/16, -8/16,  6/16,  8/16,  8/16,  8/16 }, 	-- right post
-			{ -8/16,  7/16, 13/32,  8/16,  8/16, 15/32 },	-- top piece
-			{ -8/16, -8/16, 13/32,  8/16, -7/16, 15/32 },	-- bottom piece
-			{ -8/16, -8/16,  7/16,  8/16,  8/16,  7/16 }	-- the chainlink itself
-		}
-	},
 })
 
+
 homedecor.register("fence_chainlink_corner", {
 	description = S("Chainlink Fence Corner"),
+	mesh = "homedecor_fence_chainlink_corner.obj",
 	tiles = {
 		"homedecor_fence_chainlink_corner_top.png",
 		"homedecor_fence_chainlink_corner_top.png",
@@ -257,20 +234,7 @@ homedecor.register("fence_chainlink_corner", {
 	groups = {snappy=3},
 	sounds = default.node_sound_wood_defaults(),
 	selection_box = homedecor.nodebox.corner_xz(0.125, -0.125),
-	node_box = {
+	collision_box = homedecor.nodebox.corner_xz(0.125, -0.125),
-		type = "fixed",
-		fixed = {
-			{  -8/16, -8/16,  6/16,  -6/16,  8/16,  8/16 },	-- left post, rear
-			{  -8/16, -8/16, -8/16,  -6/16,  8/16, -7/16 }, -- left post, front
-			{   7/16, -8/16,  6/16,   8/16,  8/16,  8/16 }, -- right post, rear
-			{  -8/16,  7/16, 13/32,   8/16,  8/16, 15/32 },	-- top piece, rear
-			{  -8/16, -8/16, 13/32,   8/16, -7/16, 15/32 },	-- bottom piece, rear
-			{ -15/32,  7/16, -8/16, -13/32,  8/16,  8/16 },	-- top piece, side
-			{ -15/32, -8/16, -8/16, -13/32, -7/16,  8/16 },	-- bottom piece, side
-			{  -8/16, -8/16,  7/16,   8/16,  8/16,  7/16 },	-- the chainlink itself, rear
-			{  -7/16, -8/16, -8/16,  -7/16,  8/16,  8/16 }	-- the chainlink itself, side
-		}
-	},
 })
 
 homedecor.register("fence_wrought_iron_2", {

homedecor/models/homedecor_cube.mtl

@@ -1,10 +0,0 @@
-# Blender MTL File: 'None'
-# Material Count: 1
-
-newmtl None
-Ns 0
-Ka 0.000000 0.000000 0.000000
-Kd 0.8 0.8 0.8
-Ks 0.8 0.8 0.8
-d 1
-illum 2

homedecor/models/homedecor_fence_barbed_wire.obj

@@ -0,0 +1,60 @@
+# Blender v2.73 (sub 0) OBJ File: 'homedecor-fence-barbed.blend'
+# www.blender.org
+o Cylinder
+v -0.500000 -0.500000 0.500000
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+g Cylinder_Cylinder_None
+s off
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+f 17/10/6 19/3/6 20/2/6 18/7/6

homedecor/models/homedecor_fence_barbed_wire_corner.obj

@@ -0,0 +1,79 @@
+# Blender v2.73 (sub 0) OBJ File: 'homedecor-fence-barbed-corner.blend'
+# www.blender.org
+o Cylinder
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+g Cylinder_Cylinder_None
+s off
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homedecor/models/homedecor_fence_chainlink.obj

@@ -0,0 +1,105 @@
+# Blender v2.73 (sub 0) OBJ File: 'homedecor-fence-chainlink.blend'
+# www.blender.org
+o Cylinder
+v 0.500000 -0.500000 0.500000
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homedecor/models/homedecor_fence_chainlink_corner.obj

@@ -0,0 +1,162 @@
+# Blender v2.73 (sub 0) OBJ File: 'homedecor-fence-chainlink-corner.blend'
+# www.blender.org
+o Cylinder
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+f 13/17/1 11/18/1 15/19/1 17/20/1
+f 26/20/1 24/17/1 23/18/1 25/19/1
+g Cylinder_Cylinder_bottom
+f 32/10/2 29/11/2 37/21/2 38/22/2
+f 8/23/2 7/24/2 1/25/2 2/26/2
+f 61/27/2 3/28/2 30/3/2 31/4/2
+f 52/29/2 51/30/2 49/31/2 50/32/2
+f 46/30/2 42/31/2 44/32/2 48/29/2
+f 20/33/2 22/34/2 21/35/2 19/36/2
+f 14/33/2 18/34/2 16/35/2 12/36/2
+g Cylinder_Cylinder_right
+f 5/4/3 2/10/3 1/11/3 4/3/3
+f 50/37/3 49/1/3 41/4/3 43/24/3
+f 44/5/3 42/10/3 53/22/3 54/38/3
+f 32/8/3 38/5/3 40/24/3 36/25/3
+f 61/10/3 31/11/3 35/3/3 62/4/3
+g Cylinder_Cylinder_left
+f 47/39/4 45/40/4 51/41/4 52/42/4
+f 56/43/4 55/44/4 46/45/4 48/46/4
+f 37/46/4 29/11/4 33/3/4 39/39/4
+f 30/8/4 3/45/4 6/40/4 34/25/4
+f 8/45/4 10/40/4 9/25/4 7/8/4
+f 64/44/4 60/43/4 58/42/4 63/41/4
+g Cylinder_Cylinder_back
+f 31/10/5 30/11/5 34/3/5 35/4/5
+f 38/10/5 37/11/5 39/3/5 40/4/5
+f 7/5/5 9/24/5 4/25/5 1/8/5
+f 17/4/5 15/24/5 21/37/5 22/1/5
+f 26/22/5 25/38/5 16/5/5 18/10/5
+g Cylinder_Cylinder_front
+f 36/40/6 33/25/6 29/8/6 32/45/6
+f 3/8/6 61/45/6 62/40/6 6/25/6
+f 2/11/6 5/3/6 10/39/6 8/46/6
+f 20/41/6 19/42/6 11/39/6 13/40/6
+f 24/44/6 14/45/6 12/46/6 23/43/6
+f 59/44/6 28/43/6 27/42/6 57/41/6