mtn v3 - use our own perlin

maps/mountain_fortress_v3/get_perlin.lua

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+local simplex_noise = require 'utils.simplex_noise'.d2
+
+--add or use noise templates from here
+local noises = {
+    ['bb_biterland'] = {
+        {modifier = 0.001, weight = 1},
+        {modifier = 0.01, weight = 0.35},
+        {modifier = 0.1, weight = 0.015}
+    },
+    ['bb_ore'] = {{modifier = 0.0042, weight = 1}, {modifier = 0.031, weight = 0.08}, {modifier = 0.1, weight = 0.025}},
+    ['cave_ponds'] = {{modifier = 0.01, weight = 0.75}, {modifier = 0.15, weight = 0.08}},
+    ['smol_areas'] = {{modifier = 0.005, weight = 0.85}, {modifier = 0.15, weight = 0.025}, {modifier = 0.15, weight = 0.035}},
+    ['cave_worms'] = {{modifier = 0.001, weight = 1}, {modifier = 0.1, weight = 0.06}},
+    ['cave_rivers'] = {
+        {modifier = 0.007, weight = 0.75},
+        {modifier = 0.0090, weight = 0.30},
+        {modifier = 0.075, weight = 0.03}
+    },
+    ['cave_rivers_2'] = {
+        {modifier = 0.003, weight = 1},
+        {modifier = 0.01, weight = 0.21},
+        {modifier = 0.05, weight = 0.01}
+    },
+    ['cave_rivers_3'] = {
+        {modifier = 0.002, weight = 1},
+        {modifier = 0.01, weight = 0.15},
+        {modifier = 0.05, weight = 0.01}
+    },
+    ['cave_rivers_4'] = {
+        {modifier = 0.001, weight = 1},
+        {modifier = 0.01, weight = 0.11},
+        {modifier = 0.05, weight = 0.01}
+    },
+    ['decoratives'] = {{modifier = 0.03, weight = 1}, {modifier = 0.05, weight = 0.25}, {modifier = 0.1, weight = 0.05}},
+    ['dungeons'] = {{modifier = 0.003, weight = 1}, {modifier = 0.006, weight = 0.25}},
+    ['dungeon_sewer'] = {
+        {modifier = 0.0005, weight = 1},
+        {modifier = 0.005, weight = 0.015},
+        {modifier = 0.025, weight = 0.0015}
+    },
+    ['large_caves'] = {
+        {modifier = 0.0033, weight = 1},
+        {modifier = 0.01, weight = 0.22},
+        {modifier = 0.05, weight = 0.05},
+        {modifier = 0.1, weight = 0.04}
+    },
+    ['n1'] = {{modifier = 0.0001, weight = 1}},
+    ['n2'] = {{modifier = 0.001, weight = 1}},
+    ['n3'] = {{modifier = 0.01, weight = 1}},
+    ['n4'] = {{modifier = 0.1, weight = 1}},
+    ['n5'] = {{modifier = 0.07, weight = 1}},
+    ['watery_world'] = {
+        {modifier = 0.0007, weight = 1},
+        {modifier = 0.01, weight = 0.02},
+        {modifier = 0.1, weight = 0.005}
+    },
+    ['no_rocks'] = {
+        {modifier = 0.0045, weight = 0.95},
+        {modifier = 0.017, weight = 0.25},
+        {modifier = 0.045, weight = 0.045},
+        {modifier = 0.088, weight = 0.035}
+    },
+    ['no_rocks_2'] = {{modifier = 0.016, weight = 1.15}, {modifier = 0.13, weight = 0.095}},
+    ['oasis'] = {
+        {modifier = 0.0015, weight = 1},
+        {modifier = 0.0025, weight = 0.5},
+        {modifier = 0.01, weight = 0.15},
+        {modifier = 0.1, weight = 0.017}
+    },
+    ['scrapyard'] = {
+        {modifier = 0.005, weight = 1},
+        {modifier = 0.01, weight = 0.35},
+        {modifier = 0.05, weight = 0.23},
+        {modifier = 0.1, weight = 0.11}
+    },
+    ['big_cave'] = {
+        {modifier = 0.003, weight = 1},
+        {modifier = 0.02, weight = 0.05},
+        {modifier = 0.15, weight = 0.02}
+    },
+    ['small_caves'] = {
+        {modifier = 0.006, weight = 1},
+        {modifier = 0.04, weight = 0.15},
+        {modifier = 0.22, weight = 0.05}
+    },
+    ['small_caves_2'] = {
+        {modifier = 0.009, weight = 1},
+        {modifier = 0.05, weight = 0.25},
+        {modifier = 0.25, weight = 0.05}
+    },
+    ['forest_location'] = {
+        {modifier = 0.006, weight = 1},
+        {modifier = 0.01, weight = 0.25},
+        {modifier = 0.05, weight = 0.15},
+        {modifier = 0.1, weight = 0.05}
+    },
+    ['forest_density'] = {
+        {modifier = 0.01, weight = 1},
+        {modifier = 0.05, weight = 0.5},
+        {modifier = 0.1, weight = 0.025}
+    },
+    ['cave_miner_01'] = {
+        {modifier = 0.002, weight = 1},
+        {modifier = 0.003, weight = 0.5},
+        {modifier = 0.01, weight = 0.01},
+        {modifier = 0.1, weight = 0.015}
+    },
+    ['cave_miner_02'] = {
+        {modifier = 0.006, weight = 1},
+        {modifier = 0.02, weight = 0.15},
+        {modifier = 0.25, weight = 0.025}
+    },
+    ['cm_ponds'] = {{modifier = 0.025, weight = 1}, {modifier = 0.05, weight = 0.25}, {modifier = 0.1, weight = 0.05}},
+    ['cm_ocean'] = {
+        {modifier = 0.002, weight = 1},
+        {modifier = 0.004, weight = 1},
+        {modifier = 0.02, weight = 0.05}
+    }
+}
+
+--returns a float number between -1 and 1
+local function get_noise(name, pos, seed)
+    local noise = 0
+    local d = 0
+    for i = 1, #noises[name] do
+        local mod = noises[name]
+        noise = noise + simplex_noise(pos.x * mod[i].modifier, pos.y * mod[i].modifier, seed, 0xF) * mod[i].weight
+        d = d + mod[i].weight
+        seed = seed + seed / seed
+    end
+    noise = noise / d
+    return noise
+end
+
+return get_noise