Update stem images and automatically colorize them

mods/ITEMS/mcl_farming/melon.lua

@@ -60,6 +60,10 @@ local stem_drop = {
 -- Growing unconnected stems
 
 
+local startcolor = { r = 0x2E , g = 0x9D, b = 0x2E }
+local endcolor = { r = 0xFF , g = 0xA8, b = 0x00 }
+
+
 for s=1,7 do
 	local h = s / 8
 	local doc = s == 1
@@ -68,6 +72,7 @@ for s=1,7 do
 		entry_name = "Premature Melon Stem"
 		longdesc = "Melon stems grow on farmland in 8 stages. On hydrated farmland, the growth is a bit quicker. Mature melon stems are able to grow melons."
 	end
+	local colorstring = mcl_farming:stem_color(startcolor, endcolor, s, 8)
 	minetest.register_node("mcl_farming:melontige_"..s, {
 		description = string.format("Premature Melon Stem (Stage %d)", s),
 		_doc_items_create_entry = doc,
@@ -78,7 +83,7 @@ for s=1,7 do
 		drawtype = "plantlike",
 		sunlight_propagates = true,
 		drop = stem_drop,
-		tiles = {"mcl_farming_melontige_"..s..".png"},
+		tiles = {"([combine:16x16:0,"..((8-s)*2).."=mcl_farming_melon_stem_disconnected.png)^[colorize:"..colorstring..":127"},
 		selection_box = {
 			type = "fixed",
 			fixed = {
@@ -96,14 +101,14 @@ local stem_def = {
 	description = "Mature Melon Stem",
 	_doc_items_create_entry = true,
 	_doc_items_longdesc = "A mature melon stem attempts to grow a melon at one of its four adjacent blocks. A melon can only grow on top of farmland, dirt, or a grass block. When a melon is next to a melon stem, the melon stem immediately bends and connects to the melon. While connected, a melon stem can't grow another melon. As soon all melons around the stem have been removed, it loses the connection and is ready to grow another melon.",
-	tiles = {"mcl_farming_melontige_8.png"},
+	tiles = {"mcl_farming_melon_stem_disconnected.png^[colorize:#FFA800:127"},
 }
 
 -- Register stem growth
 mcl_farming:add_plant("plant_melon_stem", "mcl_farming:melontige_unconnect", {"mcl_farming:melontige_1", "mcl_farming:melontige_2", "mcl_farming:melontige_3", "mcl_farming:melontige_4", "mcl_farming:melontige_5", "mcl_farming:melontige_6", "mcl_farming:melontige_7"}, 30, 5)
 
 -- Register actual melon, connected stems and stem-to-melon growth
-mcl_farming:add_gourd("mcl_farming:melontige_unconnect", "mcl_farming:melontige_linked", "mcl_farming:melontige_unconnect", stem_def, stem_drop, "mcl_farming:melon", melon_base_def, 25, 15, "mcl_farming_melon_stem_connected.png")
+mcl_farming:add_gourd("mcl_farming:melontige_unconnect", "mcl_farming:melontige_linked", "mcl_farming:melontige_unconnect", stem_def, stem_drop, "mcl_farming:melon", melon_base_def, 25, 15, "mcl_farming_melon_stem_connected.png^[colorize:#FFA800:127")
 
 -- Items and crafting
 minetest.register_craftitem("mcl_farming:melon_item", {

mods/ITEMS/mcl_farming/pumpkin.lua

@@ -34,6 +34,9 @@ local stem_drop = {
 
 -- Unconnected immature stem
 
+local startcolor = { r = 0x2E , g = 0x9D, b = 0x2E }
+local endcolor = { r = 0xFF , g = 0xA8, b = 0x00 }
+
 for s=1,7 do
 	local h = s / 8
 	local doc = s == 1
@@ -42,6 +45,7 @@ for s=1,7 do
 		entry_name = "Premature Pumpkin Stem"
 		longdesc = "Pumpkin stems grow on farmland in 8 stages. On hydrated farmland, the growth is a bit quicker. Mature pumpkin stems are able to grow pumpkins."
 	end
+	local colorstring = mcl_farming:stem_color(startcolor, endcolor, s, 8)
 	minetest.register_node("mcl_farming:pumpkin_"..s, {
 		description = string.format("Premature Pumpkin Stem (Stage %d)", s),
 		_doc_items_entry_name = entry_name,
@@ -52,7 +56,7 @@ for s=1,7 do
 		drawtype = "plantlike",
 		sunlight_propagates = true,
 		drop = stem_drop,
-		tiles = {"mcl_farming_pumpkintige_"..s..".png"},
+		tiles = {"([combine:16x16:0,"..((8-s)*2).."=mcl_farming_pumpkin_stem_disconnected.png)^[colorize:"..colorstring..":127"},
 		selection_box = {
 			type = "fixed",
 			fixed = {
@@ -69,7 +73,7 @@ end
 local stem_def = {
 	description = "Mature Pumpkin Stem",
 	_doc_items_longdesc = "A mature pumpkin stem attempts to grow a pumpkin at one of its four adjacent blocks. A pumpkin can only grow on top of farmland, dirt or a grass block. When a pumpkin is next to a pumpkin stem, the pumpkin stem immediately bends and connects to the pumpkin. A connected pumpkin stem can't grow another pumpkin. As soon all pumpkins around the stem have been removed, it loses the connection and is ready to grow another pumpkin.",
-	tiles = {"mcl_farming_pumpkintige_8.png"},
+	tiles = {"mcl_farming_pumpkin_stem_disconnected.png^[colorize:#FFA800:127"},
 }
 
 -- Template for pumpkin
@@ -90,7 +94,7 @@ local pumpkin_base_def = {
 mcl_farming:add_plant("plant_pumpkin_stem", "mcl_farming:pumpkintige_unconnect", {"mcl_farming:pumpkin_1", "mcl_farming:pumpkin_2", "mcl_farming:pumpkin_3", "mcl_farming:pumpkin_4", "mcl_farming:pumpkin_5", "mcl_farming:pumpkin_6", "mcl_farming:pumpkin_7"}, 30, 5)
 
 -- Register actual pumpkin, connected stems and stem-to-pumpkin growth
-mcl_farming:add_gourd("mcl_farming:pumpkintige_unconnect", "mcl_farming:pumpkintige_linked", "mcl_farming:pumpkintige_unconnect", stem_def, stem_drop, "mcl_farming:pumpkin_face", pumpkin_base_def, 30, 15, "mcl_farming_pumpkin_stem_connected.png",
+mcl_farming:add_gourd("mcl_farming:pumpkintige_unconnect", "mcl_farming:pumpkintige_linked", "mcl_farming:pumpkintige_unconnect", stem_def, stem_drop, "mcl_farming:pumpkin_face", pumpkin_base_def, 30, 15, "mcl_farming_pumpkin_stem_connected.png^[colorize:#FFA800:127",
 function(pos)
 	-- Attempt to spawn iron golem or snow golem
 	mobs_mc.tools.check_iron_golem_summon(pos)

mods/ITEMS/mcl_farming/shared_functions.lua

@@ -363,3 +363,19 @@ function mcl_farming:add_gourd(full_unconnected_stem, connected_stem_basename, s
 	})
 end
 
+-- Used for growing gourd stems. Returns the intermediate color between startcolor and endcolor at a step
+-- * startcolor: ColorSpec in table form for the stem in its lowest growing stage
+-- * endcolor: ColorSpec in table form for the stem in its final growing stage
+-- * step: The nth growth step. Counting starts at 1
+-- * step_count: The number of total growth steps
+function mcl_farming:stem_color(startcolor, endcolor, step, step_count)
+	local color = {}
+	local function get_component(startt, endd, step, step_count)
+		return math.floor(math.max(0, math.min(255, (startt + (((step-1)/step_count) * endd)))))
+	end
+	color.r = get_component(startcolor.r, endcolor.r, step, step_count)
+	color.g = get_component(startcolor.g, endcolor.g, step, step_count)
+	color.b = get_component(startcolor.b, endcolor.b, step, step_count)
+	local colorstring = string.format("#%02X%02X%02X", color.r, color.g, color.b)
+	return colorstring
+end

tools/Texture_Conversion_Table.csv

@@ -813,3 +813,7 @@ Source path,Source file,Target path,Target file,xs,ys,xl,yl,xt,yt
 /assets/minecraft/textures/blocks,redstone_dust_dot.png,/mods/ITEMS/REDSTONE/mesecons/textures,redstone_redstone_dust_dot.png,,,,,,
 /assets/minecraft/textures/blocks,redstone_dust_line0.png,/mods/ITEMS/REDSTONE/mesecons/textures,redstone_redstone_dust_line0.png,,,,,,
 /assets/minecraft/textures/blocks,redstone_dust_line1.png,/mods/ITEMS/REDSTONE/mesecons/textures,redstone_redstone_dust_line1.png,,,,,,
+/assets/minecraft/textures/blocks,pumpkin_stem_connected.png,/mods/ITEMS/mcl_farming/textures,mcl_farming_pumpkin_stem_connected.png,,,,,,
+/assets/minecraft/textures/blocks,melon_stem_connected.png,/mods/ITEMS/mcl_farming/textures,mcl_farming_melon_stem_connected.png,,,,,,
+/assets/minecraft/textures/blocks,pumpkin_stem_disconnected.png,/mods/ITEMS/mcl_farming/textures,mcl_farming_pumpkin_stem_disconnected.png,,,,,,
+/assets/minecraft/textures/blocks,melon_stem_disconnected.png,/mods/ITEMS/mcl_farming/textures,mcl_farming_melon_stem_disconnected.png,,,,,,