feat: new cell textures + unified texture for all cells

api.lua

@@ -689,13 +689,16 @@ end
 -- \param displayName Display name of cell
 -- \param node Node which can be picked up with this cell
 -- \returns nil
-industrialtest.api.registerStorageCell=function(name,displayName,node,modname)
+industrialtest.api.registerStorageCell=function(name,displayName,node,modname,color)
+	color = color or "#ffffffff"
 	if not modname then
 		modname="industrialtest"
 	end
 	minetest.register_craftitem("industrialtest:"..name.."_cell",{
 		description=S(displayName.." Cell"),
-		inventory_image=modname.."_"..name.."_cell.png",
+		inventory_image="industrialtest_cell_fluid.png",
+		inventory_overlay="industrialtest_cell_casing.png",
+		color=color,
 		on_place=function(itemstack,user,pointed)
 			if pointed.type~="node" or not user or not user:is_player() then
 				return nil

craftitems.lua

@@ -31,6 +31,14 @@ local colors={
 	sulfur="#b88805ff",
 	tin="#ebd182ff",
 	uranium="#3b8c09ff",
+	-- fluid colors
+	lava="#ff5712ff",
+	water="#277bbcff",
+	river_water="#0ebfc2ff",
+	biomass="#2a8626ff",
+	biofuel="#4eba49ff",
+	coalfuel="#462228ff",
+	coolant="#188676ff"
 }
 
 -- Power storage items
@@ -626,12 +634,12 @@ minetest.register_craft({
 		{"",industrialtest.elementKeys.tinIngot,""}
 	}
 })
-industrialtest.api.registerStorageCell("water","Water",industrialtest.elementKeys.waterSource)
+industrialtest.api.registerStorageCell("water","Water",industrialtest.elementKeys.waterSource,nil,colors.water)
 if industrialtest.mtgAvailable then
-	industrialtest.api.registerStorageCell("river_water","River Water","default:river_water_source")
+	industrialtest.api.registerStorageCell("river_water","River Water","default:river_water_source",nil,colors.river_water)
 end
 
-industrialtest.api.registerStorageCell("lava","Lava",industrialtest.elementKeys.lavaSource)
+industrialtest.api.registerStorageCell("lava","Lava",industrialtest.elementKeys.lavaSource,nil,colors.lava)
 
 minetest.register_tool("industrialtest:uranium_cell",{
 	description=S("Uranium Cell"),
@@ -639,7 +647,9 @@ minetest.register_tool("industrialtest:uranium_cell",{
 		_industrialtest_placedInNuclearReactor=1,
 		_industrialtest_nuclearReactorFuel=1
 	},
-	inventory_image="industrialtest_uranium_cell.png",
+	inventory_image="industrialtest_cell_fluid.png",
+	inventory_overlay="industrialtest_cell_casing.png",
+	color=colors.uranium,
 })
 minetest.register_craft({
 	type="shapeless",
@@ -656,7 +666,9 @@ minetest.register_tool("industrialtest:coolant_cell",{
 		_industrialtest_placedInNuclearReactor=1,
 		_industrialtest_nuclearReactorCoolant=1
 	},
-	inventory_image="industrialtest_coolant_cell.png",
+	inventory_image="industrialtest_cell_fluid.png",
+	inventory_overlay="industrialtest_cell_casing.png",
+	color=colors.coolant,
 })
 minetest.register_craft({
 	type="shaped",
@@ -681,7 +693,9 @@ end
 
 minetest.register_craftitem("industrialtest:bio_cell",{
 	description=S("Bio Cell"),
-	inventory_image="industrialtest_bio_cell.png"
+	inventory_image="industrialtest_cell_fluid.png",
+	inventory_overlay="industrialtest_cell_casing.png",
+	color=colors.biomass,
 })
 minetest.register_craft({
 	type="shapeless",
@@ -694,7 +708,9 @@ minetest.register_craft({
 
 minetest.register_craftitem("industrialtest:biofuel_cell",{
 	description=S("Biofuel Cell"),
-	inventory_image="industrialtest_bio_cell.png",
+	inventory_image="industrialtest_cell_fluid.png",
+	inventory_overlay="industrialtest_cell_casing.png",
+	color=colors.biofuel,
 	groups={
 		_industrialtest_fuel=1
 	},
@@ -709,7 +725,9 @@ industrialtest.api.registerExtractorRecipe({
 
 minetest.register_craftitem("industrialtest:hydrated_coal_cell",{
 	description=S("Hydrated Coal Cell"),
-	inventory_image="industrialtest_hydrated_coal_cell.png"
+	inventory_image="industrialtest_cell_fluid.png",
+	inventory_overlay="industrialtest_cell_casing.png",
+	color=colors.coal,
 })
 minetest.register_craft({
 	type="shapeless",
@@ -722,7 +740,9 @@ minetest.register_craft({
 
 minetest.register_craftitem("industrialtest:coalfuel_cell",{
 	description=S("Coalfuel Cell"),
-	inventory_image="industrialtest_coalfuel_cell.png",
+	inventory_image="industrialtest_cell_fluid.png",
+	inventory_overlay="industrialtest_cell_casing.png",
+	color=colors.coalfuel,
 	groups={
 		_industrialtest_fuel=1
 	},