Pinetree (by sfan5, from mg mapgen) lua generation and sapling ABM. Add checks for ignore to other trees

mods/default/nodes.lua

@@ -114,7 +114,7 @@ minetest.register_node("default:dirt_with_snow", {
 	description = "Dirt with Snow",
 	tiles = {"default_snow.png", "default_dirt.png", "default_dirt.png^default_snow_side.png"},
 	is_ground_content = true,
-	groups = {crumbly=3},
+	groups = {crumbly=3,soil=1},
 	drop = 'default:dirt',
 	sounds = default.node_sound_dirt_defaults({
 		footstep = {name="default_snow_footstep", gain=0.25},

mods/default/trees.lua

@@ -17,6 +17,8 @@ local function can_grow(pos)
 	return true
 end
 
+-- Sapling ABMs
+
 minetest.register_abm({
 	nodenames = {"default:sapling"},
 	interval = 10,
@@ -26,14 +28,15 @@ minetest.register_abm({
 			return
 		end
 
-		minetest.log("action", "A sapling grows into a tree at "..minetest.pos_to_string(pos))
+		minetest.log("action", "A sapling grows into a tree at "..
+				minetest.pos_to_string(pos))
 		default.grow_tree(pos, random(1, 4) == 1)
 	end
 })
 
 minetest.register_abm({
 	nodenames = {"default:junglesapling"},
-	interval = 10,
+	interval = 11,
 	chance = 50,
 	action = function(pos, node)
 		if not can_grow(pos) then
@@ -46,18 +49,36 @@ minetest.register_abm({
 	end
 })
 
+minetest.register_abm({
+	nodenames = {"default:pine_sapling"},
+	interval = 12,
+	chance = 50,
+	action = function(pos, node)
+		if not can_grow(pos) then
+			return
+		end
 
-local c_air = minetest.get_content_id("air")
+		minetest.log("action", "A pine sapling grows into a tree at "..
-local c_apple = minetest.get_content_id("default:apple")
+				minetest.pos_to_string(pos))
+		default.grow_pinetree(pos)
+	end
+})
+
+-- Appletree, jungletree function
 
 local function add_trunk_and_leaves(data, a, pos, tree_cid, leaves_cid,
 		height, size, iters, is_apple_tree)
 	local x, y, z = pos.x, pos.y, pos.z
+	local c_air = minetest.get_content_id("air")
+	local c_ignore = minetest.get_content_id("ignore")
+	local c_apple = minetest.get_content_id("default:apple")
 
 	-- Trunk
 	for y_dist = 0, height - 1 do
 		local vi = a:index(x, y + y_dist, z)
-		if y_dist == 0 or data[vi] == c_air or data[vi] == leaves_cid then
+		local node_id = data[vi]
+		if y_dist == 0 or node_id == c_air or node_id == c_ignore
+		or node_id == leaves_cid then
 			data[vi] = tree_cid
 		end
 	end
@@ -67,7 +88,7 @@ local function add_trunk_and_leaves(data, a, pos, tree_cid, leaves_cid,
 	for y_dist = -size, 1 do
 		local vi = a:index(x - 1, y + height + y_dist, z + z_dist)
 		for x_dist = -1, 1 do
-			if data[vi] == c_air then
+			if data[vi] == c_air or data[vi] == c_ignore then
 				if is_apple_tree and random(1, 8) == 1 then
 					data[vi] = c_apple
 				else
@@ -89,7 +110,7 @@ local function add_trunk_and_leaves(data, a, pos, tree_cid, leaves_cid,
 		for yi = 0, 1 do
 		for zi = 0, 1 do
 			local vi = a:index(clust_x + xi, clust_y + yi, clust_z + zi)
-			if data[vi] == c_air then
+			if data[vi] == c_air or data[vi] == c_ignore then
 				if is_apple_tree and random(1, 8) == 1 then
 					data[vi] = c_apple
 				else
@@ -102,9 +123,7 @@ local function add_trunk_and_leaves(data, a, pos, tree_cid, leaves_cid,
 	end
 end
 
-
+-- Appletree
-local c_tree = minetest.get_content_id("default:tree")
-local c_leaves = minetest.get_content_id("default:leaves")
 
 function default.grow_tree(pos, is_apple_tree, bad)
 	--[[
@@ -118,6 +137,8 @@ function default.grow_tree(pos, is_apple_tree, bad)
 
 	local x, y, z = pos.x, pos.y, pos.z
 	local height = random(4, 5)
+	local c_tree = minetest.get_content_id("default:tree")
+	local c_leaves = minetest.get_content_id("default:leaves")
 
 	local vm = minetest.get_voxel_manip()
 	local minp, maxp = vm:read_from_map(
@@ -134,12 +155,11 @@ function default.grow_tree(pos, is_apple_tree, bad)
 	vm:update_map()
 end
 
-local c_jungletree = minetest.get_content_id("default:jungletree")
+-- Jungletree
-local c_jungleleaves = minetest.get_content_id("default:jungleleaves")
 
 function default.grow_jungletree(pos, bad)
 	--[[
-		NOTE: Tree-placing code is currently duplicated in the engine
+		NOTE: Jungletree-placing code is currently duplicated in the engine
 		and in games that have saplings; both are deprecated but not
 		replaced yet
 	--]]
@@ -149,11 +169,16 @@ function default.grow_jungletree(pos, bad)
 
 	local x, y, z = pos.x, pos.y, pos.z
 	local height = random(8, 12)
+	local c_air = minetest.get_content_id("air")
+	local c_ignore = minetest.get_content_id("ignore")
+	local c_jungletree = minetest.get_content_id("default:jungletree")
+	local c_jungleleaves = minetest.get_content_id("default:jungleleaves")
 
 	local vm = minetest.get_voxel_manip()
 	local minp, maxp = vm:read_from_map(
 		{x = pos.x - 3, y = pos.y - 1, z = pos.z - 3},
-			{x = pos.x + 3, y = pos.y + height + 1, z = pos.z + 3})
+		{x = pos.x + 3, y = pos.y + height + 1, z = pos.z + 3}
+	)
 	local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
 	local data = vm:get_data()
 
@@ -165,9 +190,9 @@ function default.grow_jungletree(pos, bad)
 		local vi_2 = a:index(x - 1, y, z + z_dist)
 		for x_dist = -1, 1 do
 			if random(1, 3) >= 2 then
-				if data[vi_1] == c_air then
+				if data[vi_1] == c_air or data[vi_1] == c_ignore then
 					data[vi_1] = c_jungletree
-				elseif data[vi_2] == c_air then
+				elseif data[vi_2] == c_air or data[vi_2] == c_ignore then
 					data[vi_2] = c_jungletree
 				end
 			end
@@ -181,3 +206,139 @@ function default.grow_jungletree(pos, bad)
 	vm:update_map()
 end
 
+-- Pinetree from mg mapgen mod, design by sfan5, pointy top added by paramat
+
+local function add_pine_needles(data, vi, c_air, c_ignore, c_snow, c_pine_needles)
+	if data[vi] == c_air or data[vi] == c_ignore or data[vi] == c_snow then
+		data[vi] = c_pine_needles
+	end
+end
+
+local function add_snow(data, vi, c_air, c_ignore, c_snow)
+	if data[vi] == c_air or data[vi] == c_ignore then
+		data[vi] = c_snow
+	end
+end
+
+function default.grow_pinetree(pos)
+	local x, y, z = pos.x, pos.y, pos.z
+	local maxy = y + random(9, 13) -- Trunk top
+
+	local c_air = minetest.get_content_id("air")
+	local c_ignore = minetest.get_content_id("ignore")
+	local c_pinetree = minetest.get_content_id("default:pinetree")
+	local c_pine_needles  = minetest.get_content_id("default:pine_needles")
+	local c_snow = minetest.get_content_id("default:snow")
+	local c_snowblock = minetest.get_content_id("default:snowblock")
+	local c_dirtsnow = minetest.get_content_id("default:dirt_with_snow")
+
+	local vm = minetest.get_voxel_manip()
+	local minp, maxp = vm:read_from_map(
+		{x = x - 3, y = y - 1, z = z - 3},
+		{x = x + 3, y = maxy + 3, z = z + 3}
+	)
+	local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
+	local data = vm:get_data()
+
+	-- Scan for snow nodes near sapling
+	local snow = false
+	for yy = y - 1, y + 1 do
+	for zz = z - 1, z + 1 do
+		local vi  = a:index(x - 1, yy, zz)
+		for xx = x - 1, x + 1 do
+			local nodid = data[vi]
+			if nodid == c_snow
+			or nodid == c_snowblock
+			or nodid == c_dirtsnow then
+				snow = true
+			end
+			vi  = vi + 1
+		end
+	end
+	end
+
+	-- Upper branches layer
+	local dev = 3
+	for yy = maxy - 1, maxy + 1 do
+		for zz = z - dev, z + dev do
+			local vi = a:index(x - dev, yy, zz)
+			local via = a:index(x - dev, yy + 1, zz)
+			for xx = x - dev, x + dev do
+				if random() < 0.95 - dev * 0.05 then
+					add_pine_needles(data, vi, c_air, c_ignore, c_snow,
+							c_pine_needles)
+					if snow then
+						add_snow(data, via, c_air, c_ignore, c_snow)
+					end
+				end
+				vi  = vi + 1
+				via = via + 1
+			end
+		end
+		dev = dev - 1
+	end
+
+	-- Centre top nodes
+	add_pine_needles(data, a:index(x, maxy + 1, z), c_air, c_ignore, c_snow,
+			c_pine_needles)
+	add_pine_needles(data, a:index(x, maxy + 2, z), c_air, c_ignore, c_snow,
+			c_pine_needles) -- Paramat added a pointy top node
+	if snow then
+		add_snow(data, a:index(x, maxy + 3, z), c_air, c_ignore, c_snow)
+	end
+
+	-- Lower branches layer
+	local my = 0
+	for i = 1, 20 do -- Random 2x2 squares of needles
+		local xi = x + random(-3, 2)
+		local yy = maxy + random(-6, -5)
+		local zi = z + random(-3, 2)
+		if yy > my then
+			my = yy
+		end
+		for zz = zi, zi+1 do
+			local vi = a:index(xi, yy, zz)
+			local via = a:index(xi, yy + 1, zz)
+			for xx = xi, xi + 1 do
+				add_pine_needles(data, vi, c_air, c_ignore, c_snow,
+						c_pine_needles)
+				if snow then
+					add_snow(data, via, c_air, c_ignore, c_snow)
+				end
+				vi  = vi + 1
+				via = via + 1
+			end
+		end
+	end
+
+	local dev = 2
+	for yy = my + 1, my + 2 do
+		for zz = z - dev, z + dev do
+			local vi = a:index(x - dev, yy, zz)
+			local via = a:index(x - dev, yy + 1, zz)
+			for xx = x - dev, x + dev do
+				if random() < 0.95 - dev * 0.05 then
+					add_pine_needles(data, vi, c_air, c_ignore, c_snow,
+							c_pine_needles)
+					if snow then
+						add_snow(data, via, c_air, c_ignore, c_snow)
+					end
+				end
+				vi  = vi + 1
+				via = via + 1
+			end
+		end
+		dev = dev - 1
+	end
+
+	-- Trunk
+	for yy = y, maxy do
+		local vi = a:index(x, yy, z)
+		data[vi] = c_pinetree
+	end
+
+	vm:set_data(data)
+	vm:write_to_map()
+	vm:update_map()
+end
+