redo top/bottom textures for supply converter

delete back/bottom texture for power monitor
use "machine bottom" for bottom of force field generator
add cable connection overlay, use it on various machines' bottoms/sides, as appropriate

technic/machines/HV/forcefield.lua

@@ -12,6 +12,8 @@ local forcefield_power_drain   = 10
 
 local S = technic.getter
 
+local cable_entry = "^technic_cable_connection_overlay.png"
+
 minetest.register_craft({
 	output = "technic:forcefield_emitter_off",
 	recipe = {
@@ -258,7 +260,14 @@ end
 
 minetest.register_node("technic:forcefield_emitter_off", {
 	description = S("%s Forcefield Emitter"):format("HV"),
-	tiles = {"technic_forcefield_emitter_off.png"},
+	tiles = {
+		"technic_forcefield_emitter_off.png",
+		"technic_machine_bottom.png"..cable_entry,
+		"technic_forcefield_emitter_off.png",
+		"technic_forcefield_emitter_off.png",
+		"technic_forcefield_emitter_off.png",
+		"technic_forcefield_emitter_off.png"
+	},
 	groups = {cracky = 1, technic_machine = 1, technic_hv = 1},
 	on_receive_fields = forcefield_receive_fields,
 	on_construct = function(pos)
@@ -282,7 +291,14 @@ minetest.register_node("technic:forcefield_emitter_off", {
 
 minetest.register_node("technic:forcefield_emitter_on", {
 	description = S("%s Forcefield Emitter"):format("HV"),
-	tiles = {"technic_forcefield_emitter_on.png"},
+	tiles = {
+		"technic_forcefield_emitter_on.png",
+		"technic_machine_bottom.png"..cable_entry,
+		"technic_forcefield_emitter_on.png",
+		"technic_forcefield_emitter_on.png",
+		"technic_forcefield_emitter_on.png",
+		"technic_forcefield_emitter_on.png"
+	},
 	groups = {cracky = 1, technic_machine = 1, technic_hv = 1,
 			not_in_creative_inventory=1},
 	drop = "technic:forcefield_emitter_off",

technic/machines/HV/quarry.lua

@@ -2,6 +2,7 @@
 local S = technic.getter
 
 local tube_entry = "^pipeworks_tube_connection_metallic.png"
+local cable_entry = "^technic_cable_connection_overlay.png"
 
 minetest.register_craft({
 	recipe = {
@@ -211,11 +212,11 @@ minetest.register_node("technic:quarry", {
 	description = S("%s Quarry"):format("HV"),
 	tiles = {
 		"technic_carbon_steel_block.png"..tube_entry,
-		"technic_carbon_steel_block.png",
+		"technic_carbon_steel_block.png"..cable_entry,
-		"technic_carbon_steel_block.png",
+		"technic_carbon_steel_block.png"..cable_entry,
-		"technic_carbon_steel_block.png",
+		"technic_carbon_steel_block.png"..cable_entry,
 		"technic_carbon_steel_block.png^default_tool_mesepick.png",
-		"technic_carbon_steel_block.png"
+		"technic_carbon_steel_block.png"..cable_entry
 	},
 	paramtype2 = "facedir",
 	groups = {cracky=2, tubedevice=1, technic_machine=1, technic_hv=1},

technic/machines/LV/water_mill.lua

@@ -4,6 +4,8 @@
 
 local S = technic.getter
 
+local cable_entry = "^technic_cable_connection_overlay.png"
+
 minetest.register_alias("water_mill", "technic:water_mill")
 
 minetest.register_craft({
@@ -68,9 +70,14 @@ end
 
 minetest.register_node("technic:water_mill", {
 	description = S("Hydro %s Generator"):format("LV"),
-	tiles = {"technic_water_mill_top.png",  "technic_machine_bottom.png",
+	tiles = {
-	         "technic_water_mill_side.png", "technic_water_mill_side.png",
+		"technic_water_mill_top.png",
-	         "technic_water_mill_side.png", "technic_water_mill_side.png"},
+		"technic_machine_bottom.png"..cable_entry,
+		"technic_water_mill_side.png",
+		"technic_water_mill_side.png",
+		"technic_water_mill_side.png",
+		"technic_water_mill_side.png"
+	},
 	paramtype2 = "facedir",
 	groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2,
 		technic_machine=1, technic_lv=1},

technic/machines/power_monitor.lua

@@ -4,6 +4,8 @@
 
 local S = technic.getter
 
+local cable_entry = "^technic_cable_connection_overlay.png"
+
 minetest.register_craft({
 	output = "technic:power_monitor",
 	recipe = {
@@ -17,10 +19,10 @@ minetest.register_node("technic:power_monitor",{
 	description = S("Power Monitor"),
 	tiles  = {
 		"technic_power_monitor_sides.png",
-		"technic_power_monitor_bottom_back.png",
+		"technic_power_monitor_sides.png"..cable_entry,
 		"technic_power_monitor_sides.png",
 		"technic_power_monitor_sides.png",
-		"technic_power_monitor_bottom_back.png",
+		"technic_power_monitor_sides.png"..cable_entry,
 		"technic_power_monitor_front.png"
 	},
 	paramtype2 = "facedir",

technic/machines/supply_converter.lua

@@ -11,6 +11,8 @@ local digilines_path = minetest.get_modpath("digilines")
 
 local S = technic.getter
 
+local cable_entry = "^technic_cable_connection_overlay.png"
+
 local function set_supply_converter_formspec(meta)
 	local formspec = "size[5,2.25]"..
 		"field[0.3,0.5;2,1;power;"..S("Input Power")..";"..meta:get_int("power").."]"
@@ -158,9 +160,14 @@ end
 
 minetest.register_node("technic:supply_converter", {
 	description = S("Supply Converter"),
-	tiles  = {"technic_supply_converter_top.png", "technic_supply_converter_bottom.png",
+	tiles  = {
-	          "technic_supply_converter_side.png", "technic_supply_converter_side.png",
+		"technic_supply_converter_tb.png"..cable_entry,
-	          "technic_supply_converter_side.png", "technic_supply_converter_side.png"},
+		"technic_supply_converter_tb.png"..cable_entry,
+		"technic_supply_converter_side.png",
+		"technic_supply_converter_side.png",
+		"technic_supply_converter_side.png",
+		"technic_supply_converter_side.png"
+		},
 	groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2,
 		technic_machine=1, technic_all_tiers=1},
 	connect_sides = {"top", "bottom"},

technic/machines/switching_station.lua

@@ -39,6 +39,8 @@ local digilines_path = minetest.get_modpath("digilines")
 
 local S = technic.getter
 
+local cable_entry = "^technic_cable_connection_overlay.png"
+
 minetest.register_craft({
 	output = "technic:switching_station",
 	recipe = {
@@ -57,9 +59,13 @@ end
 
 minetest.register_node("technic:switching_station",{
 	description = S("Switching Station"),
-	tiles  = {"technic_water_mill_top_active.png", "technic_water_mill_top_active.png",
+	tiles  = {
-                  "technic_water_mill_top_active.png", "technic_water_mill_top_active.png",
+		"technic_water_mill_top_active.png",
-	          "technic_water_mill_top_active.png", "technic_water_mill_top_active.png"},
+		"technic_water_mill_top_active.png"..cable_entry,
+		"technic_water_mill_top_active.png",
+		"technic_water_mill_top_active.png",
+		"technic_water_mill_top_active.png",
+		"technic_water_mill_top_active.png"},
 	groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2, technic_all_tiers=1},
 	connect_sides = {"bottom"},
 	sounds = default.node_sound_wood_defaults(),