Add wild cotton plant in savanna as a source of cotton seeds (#2617)

Junglegrass is unchanged as a source of cotton seeds for now, but
probably should be removed as a source in future, as players get
used to the new source.

mods/farming/README.txt

@@ -38,3 +38,6 @@ Created by Gambit (CC BY 3.0):
 
 Created by Napiophelios (CC BY-SA 3.0):
   farming_cotton.png
+
+Created by Extex101 (CC BY-SA 3.0):
+  farming_cotton_wild.png

mods/farming/init.lua

@@ -16,7 +16,7 @@ dofile(farming.path .. "/nodes.lua")
 dofile(farming.path .. "/hoes.lua")
 
 
--- WHEAT
+-- Wheat
 
 farming.register_plant("farming:wheat", {
 	description = S("Wheat Seed"),
@@ -71,6 +71,25 @@ farming.register_plant("farming:cotton", {
 	groups = {flammable = 4},
 })
 
+minetest.register_decoration({
+	name = "farming:cotton_wild",
+	deco_type = "simple",
+	place_on = {"default:dry_dirt_with_dry_grass"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.1,
+		scale = 0.1,
+		spread = {x = 50, y = 50, z = 50},
+		seed = 4242,
+		octaves = 3,
+		persist = 0.7
+	},
+	biomes = {"savanna"},
+	y_max = 31000,
+	y_min = 1,
+	decoration = "farming:cotton_wild",
+})
+
 minetest.register_craftitem("farming:string", {
 	description = S("String"),
 	inventory_image = "farming_string.png",
@@ -139,7 +158,9 @@ minetest.register_craft({
 	burntime = 5,
 })
 
+
 -- Register farming items as dungeon loot
+
 if minetest.global_exists("dungeon_loot") then
 	dungeon_loot.register({
 		{name = "farming:string", chance = 0.5, count = {1, 8}},

mods/farming/license.txt

@@ -59,3 +59,37 @@ rights may limit how you use the material.
 
 For more details:
 http://creativecommons.org/licenses/by/3.0/
+
+-----------------------
+
+Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
+Copyright (C) 2017 Napiophelios
+Copyright (C) 2020 Extex101
+
+You are free to:
+Share — copy and redistribute the material in any medium or format.
+Adapt — remix, transform, and build upon the material for any purpose, even commercially.
+The licensor cannot revoke these freedoms as long as you follow the license terms.
+
+Under the following terms:
+
+Attribution — You must give appropriate credit, provide a link to the license, and
+indicate if changes were made. You may do so in any reasonable manner, but not in any way
+that suggests the licensor endorses you or your use.
+
+ShareAlike — If you remix, transform, or build upon the material, you must distribute
+your contributions under the same license as the original.
+
+No additional restrictions — You may not apply legal terms or technological measures that
+legally restrict others from doing anything the license permits.
+
+Notices:
+
+You do not have to comply with the license for elements of the material in the public
+domain or where your use is permitted by an applicable exception or limitation.
+No warranties are given. The license may not give you all of the permissions necessary
+for your intended use. For example, other rights such as publicity, privacy, or moral
+rights may limit how you use the material.
+
+For more details:
+http://creativecommons.org/licenses/by-sa/3.0/

mods/farming/nodes.lua

@@ -230,20 +230,53 @@ minetest.register_abm({
 })
 
 
+-- Make default:grass_* occasionally drop wheat seed
+
 for i = 1, 5 do
 	minetest.override_item("default:grass_"..i, {drop = {
 		max_items = 1,
 		items = {
-			{items = {"farming:seed_wheat"},rarity = 5},
+			{items = {"farming:seed_wheat"}, rarity = 5},
 			{items = {"default:grass_1"}},
 		}
 	}})
 end
 
+
+-- Make default:junglegrass occasionally drop cotton seed.
+
+-- This is the old source of cotton seeds that makes no sense. It is a leftover
+-- from Mapgen V6 where junglegrass was the only plant available to be a source.
+-- This source is kept for now to avoid disruption but should probably be
+-- removed in future as players get used to the new source.
+
 minetest.override_item("default:junglegrass", {drop = {
 	max_items = 1,
 	items = {
-		{items = {"farming:seed_cotton"},rarity = 8},
+		{items = {"farming:seed_cotton"}, rarity = 8},
 		{items = {"default:junglegrass"}},
 	}
 }})
+
+
+-- Wild cotton as a source of cotton seed
+
+minetest.register_node("farming:cotton_wild", {
+	description = S("Wild Cotton"),
+	drawtype = "plantlike",
+	waving = 1,
+	tiles = {"farming_cotton_wild.png"},
+	inventory_image = "farming_cotton_wild.png",
+	wield_image = "farming_cotton_wild.png",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	buildable_to = true,
+	groups = {snappy = 3, attached_node = 1, flammable = 4},
+	drop = "farming:seed_cotton",
+	sounds = default.node_sound_leaves_defaults(),
+	selection_box = {
+		type = "fixed",
+		fixed = {-6 / 16, -8 / 16, -6 / 16, 6 / 16, 5 / 16, 6 / 16},
+	},
+})