Bushes: Add saplings

Bush saplings grow in half the time of tree saplings.
Bushes do not need 'from sapling' schematic variants because only the
stem node is force-placed in the mapgen schematic, so only the sapling
is force-replaced.
Bush leaves drop saplings with a rarity that ensures at least 1 sapling
per bush on average.

game_api.txt

@@ -766,14 +766,20 @@ Trees
  * `default.grow_new_pine_tree(pos)`
   * Grows a new design pine tree at pos
 
+ * `default.grow_new_snowy_pine_tree(pos)`
+  * Grows a new design snowy pine tree at pos
+
  * `default.grow_new_acacia_tree(pos)`
   * Grows a new design acacia tree at pos
 
  * `default.grow_new_aspen_tree(pos)`
   * Grows a new design aspen tree at pos
 
- * `default.grow_new_snowy_pine_tree(pos)`
+ * `default.grow_bush(pos)`
-  * Grows a new design snowy pine tree at pos
+  * Grows a bush at pos
+
+ * `default.grow_acacia_bush(pos)`
+  * Grows an acaia bush at pos
 
 Carts
 -----

mods/default/README.txt

@@ -17,6 +17,7 @@ Cisoun's texture pack (CC BY-SA 3.0):
   default_lava.png
   default_leaves.png
   default_sapling.png
+  default_bush_sapling.png
   default_stone.png
   default_tree.png
   default_tree_top.png
@@ -90,6 +91,7 @@ paramat (CC BY-SA 3.0):
   default_acacia_leaves.png
   default_acacia_leaves_simple.png
   default_acacia_sapling.png
+  default_acacia_bush_sapling.png
   default_acacia_tree.png
   default_acacia_tree_top.png
   default_acacia_wood.png
@@ -126,7 +128,7 @@ brunob.santos (CC BY-SA 4.0):
   default_desert_cobble.png
 
 BlockMen (CC BY-SA 3.0):
-  default_aspen_leaves.png
+  default_aspen_leaves.png -- Derived from Sofar's texture
   default_wood.png
   default_clay_brick.png
   default_iron_ingot.png

mods/default/crafting.lua

@@ -966,6 +966,18 @@ minetest.register_craft({
 	burntime = 10,
 })
 
+minetest.register_craft({
+	type = "fuel",
+	recipe = "default:bush_sapling",
+	burntime = 6,
+})
+
+minetest.register_craft({
+	type = "fuel",
+	recipe = "default:acacia_bush_sapling",
+	burntime = 7,
+})
+
 minetest.register_craft({
 	type = "fuel",
 	recipe = "default:aspen_sapling",

mods/default/nodes.lua

@@ -140,8 +140,10 @@ default:dry_grass_5
 
 default:bush_stem
 default:bush_leaves
+default:bush_sapling
 default:acacia_bush_stem
 default:acacia_bush_leaves
+default:acacia_bush_sapling
 
 Corals
 ------
@@ -1307,11 +1309,53 @@ minetest.register_node("default:bush_leaves", {
 	tiles = {"default_leaves_simple.png"},
 	paramtype = "light",
 	groups = {snappy = 3, flammable = 2, leaves = 1},
+	drop = {
+		max_items = 1,
+		items = {
+			{items = {"default:bush_sapling"}, rarity = 5},
+			{items = {"default:bush_leaves"}}
+		}
+	},
 	sounds = default.node_sound_leaves_defaults(),
 
 	after_place_node = default.after_place_leaves,
 })
 
+minetest.register_node("default:bush_sapling", {
+	description = "Bush Sapling",
+	drawtype = "plantlike",
+	tiles = {"default_bush_sapling.png"},
+	inventory_image = "default_bush_sapling.png",
+	wield_image = "default_bush_sapling.png",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	on_timer = default.grow_sapling,
+	selection_box = {
+		type = "fixed",
+		fixed = {-4 / 16, -0.5, -4 / 16, 4 / 16, 2 / 16, 4 / 16}
+	},
+	groups = {snappy = 2, dig_immediate = 3, flammable = 2,
+		attached_node = 1, sapling = 1},
+	sounds = default.node_sound_leaves_defaults(),
+
+	on_construct = function(pos)
+		minetest.get_node_timer(pos):start(math.random(1200, 2400))
+	end,
+
+	on_place = function(itemstack, placer, pointed_thing)
+		itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
+			"default:bush_sapling",
+			-- minp, maxp to be checked, relative to sapling pos
+			{x = -1, y = 0, z = -1},
+			{x = 1, y = 1, z = 1},
+			-- maximum interval of interior volume check
+			2)
+
+		return itemstack
+	end,
+})
+
 minetest.register_node("default:acacia_bush_stem", {
 	description = "Acacia Bush Stem",
 	drawtype = "plantlike",
@@ -1336,11 +1380,53 @@ minetest.register_node("default:acacia_bush_leaves", {
 	tiles = {"default_acacia_leaves_simple.png"},
 	paramtype = "light",
 	groups = {snappy = 3, flammable = 2, leaves = 1},
+	drop = {
+		max_items = 1,
+		items = {
+			{items = {"default:acacia_bush_sapling"}, rarity = 5},
+			{items = {"default:acacia_bush_leaves"}}
+		}
+	},
 	sounds = default.node_sound_leaves_defaults(),
 
 	after_place_node = default.after_place_leaves,
 })
 
+minetest.register_node("default:acacia_bush_sapling", {
+	description = "Acacia Bush Sapling",
+	drawtype = "plantlike",
+	tiles = {"default_acacia_bush_sapling.png"},
+	inventory_image = "default_acacia_bush_sapling.png",
+	wield_image = "default_acacia_bush_sapling.png",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	on_timer = default.grow_sapling,
+	selection_box = {
+		type = "fixed",
+		fixed = {-3 / 16, -0.5, -3 / 16, 3 / 16, 2 / 16, 3 / 16}
+	},
+	groups = {snappy = 2, dig_immediate = 3, flammable = 2,
+		attached_node = 1, sapling = 1},
+	sounds = default.node_sound_leaves_defaults(),
+
+	on_construct = function(pos)
+		minetest.get_node_timer(pos):start(math.random(1200, 2400))
+	end,
+
+	on_place = function(itemstack, placer, pointed_thing)
+		itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
+			"default:acacia_bush_sapling",
+			-- minp, maxp to be checked, relative to sapling pos
+			{x = -1, y = 0, z = -1},
+			{x = 1, y = 1, z = 1},
+			-- maximum interval of interior volume check
+			2)
+
+		return itemstack
+	end,
+})
+
 
 --
 -- Corals

mods/default/trees.lua

@@ -77,6 +77,14 @@ function default.grow_sapling(pos)
 		minetest.log("action", "An aspen sapling grows into a tree at "..
 			minetest.pos_to_string(pos))
 		default.grow_new_aspen_tree(pos)
+	elseif node.name == "default:bush_sapling" then
+		minetest.log("action", "A bush sapling grows into a bush at "..
+			minetest.pos_to_string(pos))
+		default.grow_bush(pos)
+	elseif node.name == "default:acacia_bush_sapling" then
+		minetest.log("action", "An acacia bush sapling grows into a bush at "..
+			minetest.pos_to_string(pos))
+		default.grow_acacia_bush(pos)
 	end
 end
 
@@ -426,6 +434,29 @@ function default.grow_new_aspen_tree(pos)
 end
 
 
+-- Bushes do not need 'from sapling' schematic variants because
+-- only the stem node is force-placed in the schematic.
+
+-- Bush
+
+function default.grow_bush(pos)
+	local path = minetest.get_modpath("default") ..
+		"/schematics/bush.mts"
+	minetest.place_schematic({x = pos.x - 1, y = pos.y - 1, z = pos.z - 1},
+		path, "0", nil, false)
+end
+
+
+-- Acacia bush
+
+function default.grow_acacia_bush(pos)
+	local path = minetest.get_modpath("default") ..
+		"/schematics/acacia_bush.mts"
+	minetest.place_schematic({x = pos.x - 1, y = pos.y - 1, z = pos.z - 1},
+		path, "0", nil, false)
+end
+
+
 --
 -- Sapling 'on place' function to check protection of node and resulting tree volume
 --