Converted to using a mesh instead of a flat texture

init.lua

@@ -1,6 +1,8 @@
 tpad = {}
 tpad.version = "1.1"
-tpad.tile_image = "tpad-pix-16.png"
+tpad.texture = "tpad-texture.png"
+tpad.mesh = "tpad-mesh.obj"
+tpad.nodename = "tpad:tpad"
 
 -- load storage facilities and verify it
 dofile(minetest.get_modpath(minetest.get_current_modname()) .. "/storage.lua")
@@ -16,7 +18,7 @@ local waypoint_hud_ids = {}
 
 -- not-so-cheap recipe
 minetest.register_craft({
-	output = 'tpad:tpad',
+	output = tpad.nodename,
 	recipe = {
 		{'group:wood',           'default:bronze_ingot', 'group:wood'},
 		{'default:bronze_ingot', 'group:wood',           'default:bronze_ingot'},
@@ -68,18 +70,44 @@ function tpad.hud_off(playername)
 end
 
 -- ========================================================================
--- callbacks bound in register_node("tpad:tpad")
+-- callbacks bound in register_node()
 -- ========================================================================
 
-function tpad.on_construct(pos)
-	local meta = minetest.env:get_meta(pos)
-	meta:set_string("infotext", "Tpad Station - right click to interact")
+function tpad.get_pos_from_pointed(pointed)
+	local node_above = minetest.get_node_or_nil(pointed.above)
+	local node_under = minetest.get_node_or_nil(pointed.under)
+
+	if not node_above or not node_under then return end
+
+	if node_under.name == tpad.nodename then
+		-- bail out cause on_place() gets triggered at every rightclick and leads to ghost pads
+		return 
+	end
+
+	local def_above = minetest.registered_nodes[node_above.name]
+						or minetest.nodedef_default
+	local def_under = minetest.registered_nodes[node_under.name]
+						or minetest.nodedef_default
+
+	if not def_above.buildable_to and not def_under.buildable_to then return end
+
+	if def_under.buildable_to then
+		return pointed.under
+	end
+
+	return pointed.above
 end
 
-function tpad.after_place_node(pos, placer)
-	local meta = minetest.env:get_meta(pos)
-	meta:set_string("owner", placer:get_player_name())
-	tpad.set_pad_name(pos, "")
+function tpad.on_place(itemstack, placer, pointed_thing)
+	local pos = tpad.get_pos_from_pointed(pointed_thing)
+	itemstack = minetest.rotate_node(itemstack, placer, pointed_thing)
+	if pos then
+		local meta = minetest.env:get_meta(pos)
+		meta:set_string("owner", placer:get_player_name())
+		meta:set_string("infotext", "Tpad Station - right click to interact")
+		tpad.set_pad_name(pos, "")
+	end
+	return itemstack
 end
 
 function tpad.on_rightclick(clicked_pos, node, clicker)
@@ -334,18 +362,23 @@ end
 -- register node and bind callbacks
 -- ========================================================================
 
-minetest.register_node("tpad:tpad", {
-	tiles = {tpad.tile_image},
-	drawtype = "signlike",
-	paramtype = "light",
-	paramtype2 = "wallmounted",
-	walkable = false,
+local collision_box =  {
+	type = "fixed",
+	fixed = {
+		{ -0.5,   -0.5,  -0.5,   0.5,  -0.3, 0.5 },
+	}
+}
+
+minetest.register_node(tpad.nodename, {
+	drawtype = "mesh",
+	tiles = { tpad.texture },
+	mesh = tpad.mesh,
+	paramtype2 = "facedir",
+	on_place = tpad.on_place,
+	collision_box = collision_box,
+	selection_box = collision_box,
 	description = "Teleporter Pad",
-	inventory_image = tpad.tile_image,
 	groups = {choppy = 2, dig_immediate = 2},
-	selection_box = { type = "wallmounted"},
-	on_construct = tpad.on_construct,
-	after_place_node = tpad.after_place_node,
 	on_rightclick = tpad.on_rightclick,
 	can_dig = tpad.can_dig,
 	on_destruct = tpad.on_destruct,

models/tpad-mesh.obj

@@ -0,0 +1,60 @@
+# Blender v2.79 (sub 0) OBJ File: 'tpad.blend'
+# www.blender.org
+mtllib tpad-mesh.mtl
+o Cube
+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 -0.429289 -0.300000 -0.429289
+v 0.429289 -0.300000 -0.429289
+v 0.429289 -0.300000 0.429289
+v -0.429289 -0.300000 0.429289
+v -0.500000 -0.380000 -0.500000
+v 0.500000 -0.380000 -0.499999
+v -0.500000 -0.380000 0.500000
+v 0.500000 -0.380000 0.500000
+vt 0.078125 0.421875
+vt 0.078125 0.000000
+vt 0.484375 0.000000
+vt 0.484375 0.421875
+vt 0.093750 0.515625
+vt 0.468750 0.515625
+vt 0.468750 0.890625
+vt 0.093750 0.890625
+vt -0.000000 0.484375
+vt 0.046875 0.484375
+vt 0.046875 0.921875
+vt -0.000000 0.921875
+vt 0.078125 0.984375
+vt 0.078125 0.937500
+vt 0.484375 0.937500
+vt 0.484375 0.984375
+vt 0.562500 0.921875
+vt 0.515625 0.921875
+vt 0.515625 0.484375
+vt 0.562500 0.484375
+vt 0.078125 0.468750
+vt 0.484375 0.468750
+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 -0.0000
+vn 0.0000 0.0000 -1.0000
+vn 1.0000 -0.0000 0.0000
+vn -0.0000 -0.0000 1.0000
+vn -1.0000 0.0000 -0.0000
+vn 0.0000 0.6623 -0.7493
+vn -0.7493 0.6623 -0.0000
+vn 0.7493 0.6623 0.0000
+vn -0.0000 0.6623 0.7493
+usemtl Material
+s off
+f 1/1/1 2/2/1 3/3/1 4/4/1
+f 5/5/2 8/6/2 7/7/2 6/8/2
+f 1/9/3 9/10/3 10/11/3 2/12/3
+f 2/13/4 10/14/4 12/15/4 3/16/4
+f 3/17/5 12/18/5 11/19/5 4/20/5
+f 9/21/6 1/1/6 4/4/6 11/22/6
+f 5/5/7 6/8/7 10/11/7 9/10/7
+f 8/6/8 5/5/8 9/21/8 11/22/8
+f 6/8/9 7/7/9 12/15/9 10/14/9
+f 7/7/10 8/6/10 11/19/10 12/18/10