5 biomes, trees, grasses, flowers. tune params

README.txt

@@ -1,4 +1,4 @@
-watershed 0.1.1 by paramat
+watershed 0.2.0 by paramat
 For latest stable Minetest back to 0.4.8
 Depends default
 Licenses: code WTFPL

functions.lua

@@ -0,0 +1,126 @@
+function watershed_appletree(x, y, z, area, data)
+	local c_tree = minetest.get_content_id("default:tree")
+	local c_apple = minetest.get_content_id("default:apple")
+	local c_leaves = minetest.get_content_id("default:leaves")
+	for j = -2, 4 do
+		if j >= 1 then
+			for i = -2, 2 do
+			for k = -2, 2 do
+				local vil = area:index(x + i, y + j + 1, z + k)
+				if math.random(48) == 2 then
+					data[vil] = c_apple
+				elseif math.random(3) ~= 2 then
+					data[vil] = c_leaves
+				end
+			end
+			end
+		end
+		local vit = area:index(x, y + j, z)
+		data[vit] = c_tree
+	end
+end
+
+function watershed_pinetree(x, y, z, area, data)
+	local c_tree = minetest.get_content_id("default:tree")
+	local c_wsneedles = minetest.get_content_id("watershed:needles")
+	local c_snowblock = minetest.get_content_id("default:snowblock")
+	for j = -4, 13 do
+		if j == 3 or j == 6 or j == 9 or j == 12 then
+			for i = -2, 2 do
+			for k = -2, 2 do
+				if math.abs(i) == 2 or math.abs(k) == 2 then
+					if math.random(5) ~= 2 then
+						local vil = area:index(x + i, y + j, z + k)
+						data[vil] = c_wsneedles
+						local vila = area:index(x + i, y + j + 1, z + k)
+						data[vila] = c_snowblock
+					end
+				end
+			end
+			end
+		elseif j == 4 or j == 7 or j == 10 or j == 13 then
+			for i = -1, 1 do
+			for k = -1, 1 do
+				if not (i == 0 and j == 0) then
+					if math.random(7) ~= 2 then
+						local vil = area:index(x + i, y + j, z + k)
+						data[vil] = c_wsneedles
+						local vila = area:index(x + i, y + j + 1, z + k)
+						data[vila] = c_snowblock
+					end
+				end
+			end
+			end
+		end
+		local vit = area:index(x, y + j, z)
+		data[vit] = c_tree
+	end
+	local vil = area:index(x, y + 14, z)
+	local vila = area:index(x, y + 15, z)
+	local vilaa = area:index(x, y + 16, z)
+	data[vil] = c_wsneedles
+	data[vila] = c_wsneedles
+	data[vilaa] = c_snowblock
+end
+
+function watershed_jungletree(x, y, z, area, data)
+	local c_juntree = minetest.get_content_id("default:jungletree")
+	local c_wsjunleaf = minetest.get_content_id("watershed:jungleleaf")
+	for j = -5, 17 do
+		if j == 11 or j == 17 then
+			for i = -2, 2 do
+			for k = -2, 2 do
+				local vil = area:index(x + i, y + j + math.random(0, 1), z + k)
+				if math.random(5) ~= 2 then
+					data[vil] = c_wsjunleaf
+				end
+			end
+			end
+		end
+		local vit = area:index(x, y + j, z)
+		data[vit] = c_juntree
+	end
+end
+
+function watershed_grass(data, vi)
+	local c_grass1 = minetest.get_content_id("default:grass_1")
+	local c_grass2 = minetest.get_content_id("default:grass_2")
+	local c_grass3 = minetest.get_content_id("default:grass_3")
+	local c_grass4 = minetest.get_content_id("default:grass_4")
+	local c_grass5 = minetest.get_content_id("default:grass_5")
+	local rand = math.random(5)
+	if rand == 1 then
+		data[vi] = c_grass1
+	elseif rand == 2 then
+		data[vi] = c_grass2
+	elseif rand == 3 then
+		data[vi] = c_grass3
+	elseif rand == 4 then
+		data[vi] = c_grass4
+	else
+		data[vi] = c_grass5
+	end
+end
+
+function watershed_flower(data, vi)
+	local c_danwhi = minetest.get_content_id("flowers:dandelion_white")
+	local c_danyel = minetest.get_content_id("flowers:dandelion_yellow")
+	local c_rose = minetest.get_content_id("flowers:rose")
+	local c_tulip = minetest.get_content_id("flowers:tulip")
+	local c_geranium = minetest.get_content_id("flowers:geranium")
+	local c_viola = minetest.get_content_id("flowers:viola")
+	local rand = math.random(6)
+	if rand == 1 then
+		data[vi] = c_danwhi
+	elseif rand == 2 then
+		data[vi] = c_rose
+	elseif rand == 3 then
+		data[vi] = c_tulip
+	elseif rand == 4 then
+		data[vi] = c_danyel
+	elseif rand == 5 then
+		data[vi] = c_geranium
+	else
+		data[vi] = c_viola
+	end
+end

init.lua

@@ -1,22 +1,34 @@
--- watershed 0.1.1 by paramat
+-- watershed 0.2.0 by paramat
 -- For latest stable Minetest and back to 0.4.8
 -- Depends default
 -- License: code WTFPL
 
+-- TODO
+-- Faults and strata
+-- Arctan gradient?
+
 -- Parameters
 
 local YMIN = 6000
 local YMAX = 8000
 local TERCEN = 7008 -- Terrain centre
 local YWAT = 7024 -- Sea level
-local TERSCA = 512 -- Vertical terrain scale
+local TERSCA = 384 -- Vertical terrain scale
+local BASAMP = 0.3 -- Base terrain amplitude
+local CANAMP = 0.7 -- Canyon terrain amplitude
+local CANEXP = 1.33 -- Canyon shape exponent
 local TSTONE = 0.02 -- Density threshold for stone
 local TDIRT = 0.01 -- Density threshold for dirt
-local BASAMP = 0.5 -- Base terrain amplitude
+local TRIV = -0.016 -- Maximum densitybase threshold for river water
-local BASEXP = 0.8 -- Base terrain exponent
+local TSAND = -0.02 -- Maximum densitybase threshold for sand
-local CANAMP = 0.5 -- Canyon terrain amplitude
+
-local TRIV = -0.012 -- Maximum densitybase threshold for river water
+local PINCHA = 47
-local TSAND = -0.015 -- Maximum densitybase threshold for sand
+local APTCHA = 47
+local FLOCHA = 36
+local FOGCHA = 9
+local GRACHA = 5
+local JUTCHA = 16
+local JUGCHA = 9
 
 -- 3D noise for rough terrain
 
@@ -26,7 +38,7 @@ local np_rough = {
 	spread = {x=512, y=512, z=512},
 	seed = 593,
 	octaves = 6,
-	persist = 0.6
+	persist = 0.63
 }
 
 -- 3D noise for smooth terrain
@@ -40,15 +52,15 @@ local np_smooth = {
 	persist = 0.4
 }
 
--- 2D noise for base terrain / riverbed height, terrain blend, river and river sand depth
+-- 2D noise for base terrain / riverbed height / mountain ranges, terrain blend, river and river sand depth
 
 local np_base = {
 	offset = 0,
 	scale = 1,
 	spread = {x=4096, y=4096, z=4096},
 	seed = 8890,
-	octaves = 3,
+	octaves = 4,
-	persist = 0.5
+	persist = 0.4
 }
 
 -- 2D noise for biomes
@@ -56,7 +68,7 @@ local np_base = {
 local np_biome = {
 	offset = 0,
 	scale = 1,
-	spread = {x=2048, y=2048, z=2048},
+	spread = {x=512, y=512, z=512},
 	seed = -677772,
 	octaves = 3,
 	persist = 0.5
@@ -66,95 +78,8 @@ local np_biome = {
 
 watershed = {}
 
--- Nodes
+dofile(minetest.get_modpath("watershed").."/nodes.lua")
-
+dofile(minetest.get_modpath("watershed").."/functions.lua")
-minetest.register_node("watershed:grass", {
-	description = "WS Grass",
-	tiles = {"default_grass.png", "default_dirt.png", "default_grass.png"},
-	is_ground_content = false,
-	groups = {crumbly=3,soil=1},
-	drop = "default:dirt",
-	sounds = default.node_sound_dirt_defaults({
-		footstep = {name="default_grass_footstep", gain=0.25},
-	}),
-})
-
-minetest.register_node("watershed:redstone", {
-	description = "WS Red Stone",
-	tiles = {"default_desert_stone.png"},
-	groups = {cracky=3},
-	sounds = default.node_sound_stone_defaults(),
-})
-
-minetest.register_node("watershed:stone", {
-	description = "WS Stone",
-	tiles = {"default_stone.png"},
-	groups = {cracky=3},
-	sounds = default.node_sound_stone_defaults(),
-})
-
-minetest.register_node("watershed:water", {
-	description = "WS Water Source",
-	inventory_image = minetest.inventorycube("default_water.png"),
-	drawtype = "liquid",
-	tiles = {
-		{name="default_water_source_animated.png", animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=2.0}}
-	},
-	alpha = WATER_ALPHA,
-	paramtype = "light",
-	is_ground_content = false,
-	walkable = false,
-	pointable = false,
-	diggable = false,
-	buildable_to = true,
-	drop = "",
-	drowning = 1,
-	liquidtype = "source",
-	liquid_alternative_flowing = "watershed:waterflow",
-	liquid_alternative_source = "watershed:water",
-	liquid_viscosity = WATER_VISC,
-	liquid_renewable = false,
-	liquid_range = 3,
-	post_effect_color = {a=64, r=100, g=100, b=200},
-	groups = {water=3, liquid=3, puts_out_fire=1},
-})
-
-minetest.register_node("watershed:waterflow", {
-	description = "WS Flowing Water",
-	inventory_image = minetest.inventorycube("default_water.png"),
-	drawtype = "flowingliquid",
-	tiles = {"default_water.png"},
-	special_tiles = {
-		{
-			image="default_water_flowing_animated.png",
-			backface_culling=false,
-			animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=0.8}
-		},
-		{
-			image="default_water_flowing_animated.png",
-			backface_culling=true,
-			animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=0.8}
-		},
-	},
-	alpha = WATER_ALPHA,
-	paramtype = "light",
-	paramtype2 = "flowingliquid",
-	is_ground_content = false,
-	walkable = false,
-	pointable = false,
-	diggable = false,
-	buildable_to = true,
-	drop = "",
-	drowning = 1,
-	liquidtype = "flowing",
-	liquid_alternative_flowing = "watershed:waterflow",
-	liquid_alternative_source = "watershed:water",
-	liquid_viscosity = WATER_VISC,
-	liquid_renewable = false,
-	liquid_range = 3,
-	post_effect_color = {a=64, r=100, g=100, b=200},
-	groups = {water=3, liquid=3, puts_out_fire=1, not_in_creative_inventory=1},
-})
 
 -- On generated function
 
@@ -183,6 +108,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	local c_desand = minetest.get_content_id("default:desert_sand")
 	local c_snowblock = minetest.get_content_id("default:snowblock")
 	local c_dirt = minetest.get_content_id("default:dirt")
+	local c_dirtsnow = minetest.get_content_id("default:dirt_with_snow")
+	local c_jungrass = minetest.get_content_id("default:junglegrass")
 	
 	local c_wswater = minetest.get_content_id("watershed:water")
 	local c_wsstone = minetest.get_content_id("watershed:stone")
@@ -203,9 +130,11 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	local nixyz = 1
 	local nixz = 1
 	local stable = {}
+	local under = {}
 	for z = z0, z1 do -- for each xy plane progressing northwards
 		for x = x0, x1 do
 			local si = x - x0 + 1
+			under[si] = 0
 			local nodename = minetest.get_node({x=x,y=y0-1,z=z}).name
 			if nodename == "air"
 			or nodename == "default:water_source" then
@@ -216,19 +145,19 @@ minetest.register_on_generated(function(minp, maxp, seed)
 		end
 		for y = y0, y1 do -- for each x row progressing upwards
 			local vi = area:index(x0, y, z)
+			local viu = area:index(x0, y-1, z)
 			for x = x0, x1 do -- for each node do
 				local si = x - x0 + 1
 				local grad = (TERCEN - y) / TERSCA
 				local n_base = nvals_base[nixz]
-				local terblen = math.max(1 - math.abs(n_base) ^ BASEXP, 0)
+				local terblen = 1 - math.abs(n_base)
 				local densitybase = terblen * BASAMP
 				+ grad
-				local triv = TRIV * (1 - terblen)
+				local triv = TRIV * (1 - terblen * 1.1) -- 1.1 river disappears before ridge top
-				local tsand = TSAND * (1 - terblen)
+				local tsand = TSAND * (1 - terblen * 1.1)
-				local tstone = TSTONE -- by height not terblen
+				local tstone = TSTONE * (1 + grad * 1.5)
-				local canexp = 1.2
 				local density = densitybase
-				+ math.abs(nvals_rough[nixyz] * terblen + nvals_smooth[nixyz] * (1 - terblen)) ^ canexp * CANAMP
+				+ math.abs(nvals_rough[nixyz] * terblen + nvals_smooth[nixyz] * (1 - terblen)) ^ CANEXP * CANAMP
 				local n_biome = nvals_biome[nixz]
 				
 				if density >= tstone then -- stone
@@ -239,32 +168,80 @@ minetest.register_on_generated(function(minp, maxp, seed)
 					end
 					stable[si] = stable[si] + 1
 				elseif density >= 0 and density < tstone and stable[si] >= 2 then -- fine materials
-					if densitybase >= tsand or y <= YWAT + math.random(3) then
+					if densitybase >= tsand or y <= YWAT + 1 + math.random(2) then
 						data[vi] = c_sand -- riverbed, seabed
 					else
-						if n_biome > 0.5 then
+						if n_biome > 0.7 then
 							data[vi] = c_desand
-						elseif density > TDIRT then
+							under[si] = 5 -- desert
+						elseif n_biome > 0.2 then
 							data[vi] = c_dirt
-						elseif n_biome < -0.5 then
+							under[si] = 4 -- rainforest
-							data[vi] = c_snowblock
+						elseif n_biome > -0.2 then
+							data[vi] = c_dirt
+							under[si] = 3 -- grassland
+						elseif n_biome > -0.7 then
+							data[vi] = c_dirt
+							under[si] = 2 -- forest
 						else
-							data[vi] = c_wsgrass
+							data[vi] = c_dirt
+							under[si] = 1 -- taiga
 						end
 					end
 				elseif y <= YWAT then -- sea level water
 					data[vi] = c_water
 					stable[si] = 0
+					under[si] = 0
 				elseif densitybase >= triv then -- river water
 					data[vi] = c_wswater
 					stable[si] = 0
+					under[si] = 0
+				else -- possible above surface air node
+					if y >= YWAT and under[si] ~= 0 then
+						if under[si] == 1 then
+							if trees and math.random(PINCHA) == 2 then
+								watershed_pinetree(x, y, z, area, data)
 							else
-					data[vi] = c_air
+								data[viu] = c_dirtsnow
+								data[vi] = c_snowblock
+							end
+						elseif under[si] == 2 then -- surface node turned to grass
+							if trees and math.random(APTCHA) == 2 then
+								watershed_appletree(x, y, z, area, data)
+							elseif math.random(FLOCHA) == 2 then
+								data[viu] = c_wsgrass
+								watershed_flower(data, vi)
+							elseif math.random(FOGCHA) == 2 then
+								data[viu] = c_wsgrass
+								watershed_grass(data, vi)
+							end
+						elseif under[si] == 3 then
+							data[viu] = c_wsgrass
+							if math.random(GRACHA) == 2 then
+								if math.random(3) == 2 then
+									watershed_grass(data, vi)
+								else
+									data[vi] = c_jungrass
+								end
+							end
+						elseif under[si] == 4 then
+							if math.random(JUTCHA) == 2 then
+								watershed_jungletree(x, y, z, area, data)
+							else
+								data[viu] = c_wsgrass
+								if math.random(JUGCHA) == 2 then
+									data[vi] = c_jungrass
+								end
+							end
+						end
+					end
 					stable[si] = 0
+					under[si] = 0
 				end
 				nixyz = nixyz + 1 -- increment 3D noise index
 				nixz = nixz + 1 -- increment 2D noise index
 				vi = vi + 1
+				viu = viu + 1
 			end
 			nixz = nixz - 80 -- rewind 2D noise index by 80 nodes for next x row above
 		end

nodes.lua

@@ -0,0 +1,106 @@
+minetest.register_node("watershed:needles", {
+	description = "WS Pine Needles",
+	tiles = {"paragen_needles.png"},
+	is_ground_content = false,
+	groups = {snappy=3, leafdecay=3},
+	sounds = default.node_sound_leaves_defaults(),
+})
+
+minetest.register_node("watershed:jungleleaf", {
+	description = "WS Jungletree Leaves",
+	drawtype = "allfaces_optional",
+	visual_scale = 1.3,
+	tiles = {"default_jungleleaves.png"},
+	paramtype = "light",
+	is_ground_content = false,
+	groups = {snappy=3, leafdecay=4, flammable=2, leaves=1},
+	sounds = default.node_sound_leaves_defaults(),
+})
+
+minetest.register_node("watershed:grass", {
+	description = "WS Grass",
+	tiles = {"default_grass.png", "default_dirt.png", "default_grass.png"},
+	is_ground_content = false,
+	groups = {crumbly=3,soil=1},
+	drop = "default:dirt",
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name="default_grass_footstep", gain=0.25},
+	}),
+})
+
+minetest.register_node("watershed:redstone", {
+	description = "WS Red Stone",
+	tiles = {"default_desert_stone.png"},
+	groups = {cracky=3},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node("watershed:stone", {
+	description = "WS Stone",
+	tiles = {"default_stone.png"},
+	groups = {cracky=3},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node("watershed:water", {
+	description = "WS Water Source",
+	inventory_image = minetest.inventorycube("default_water.png"),
+	drawtype = "liquid",
+	tiles = {
+		{name="default_water_source_animated.png", animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=2.0}}
+	},
+	alpha = WATER_ALPHA,
+	paramtype = "light",
+	is_ground_content = false,
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	drop = "",
+	drowning = 1,
+	liquidtype = "source",
+	liquid_alternative_flowing = "watershed:waterflow",
+	liquid_alternative_source = "watershed:water",
+	liquid_viscosity = WATER_VISC,
+	liquid_renewable = false,
+	liquid_range = 3,
+	post_effect_color = {a=64, r=100, g=100, b=200},
+	groups = {water=3, liquid=3, puts_out_fire=1},
+})
+
+minetest.register_node("watershed:waterflow", {
+	description = "WS Flowing Water",
+	inventory_image = minetest.inventorycube("default_water.png"),
+	drawtype = "flowingliquid",
+	tiles = {"default_water.png"},
+	special_tiles = {
+		{
+			image="default_water_flowing_animated.png",
+			backface_culling=false,
+			animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=0.8}
+		},
+		{
+			image="default_water_flowing_animated.png",
+			backface_culling=true,
+			animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=0.8}
+		},
+	},
+	alpha = WATER_ALPHA,
+	paramtype = "light",
+	paramtype2 = "flowingliquid",
+	is_ground_content = false,
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	drop = "",
+	drowning = 1,
+	liquidtype = "flowing",
+	liquid_alternative_flowing = "watershed:waterflow",
+	liquid_alternative_source = "watershed:water",
+	liquid_viscosity = WATER_VISC,
+	liquid_renewable = false,
+	liquid_range = 3,
+	post_effect_color = {a=64, r=100, g=100, b=200},
+	groups = {water=3, liquid=3, puts_out_fire=1, not_in_creative_inventory=1},
+})