Merge pull request 'Add End main island generation' (#1459) from end_main_island into master

Reviewed-on: https://git.minetest.land/MineClone2/MineClone2/pulls/1459

mods/MAPGEN/mcl_end_island/init.lua

@@ -0,0 +1,36 @@
+local noisemap = PerlinNoiseMap({
+	offset = 0.5,
+	scale = 0.5,
+	spread = {x = 84, y = 84, z = 84},
+	seed = minetest.get_mapgen_setting("seed") + 99999,
+	octaves = 4,
+	persist = 0.85,
+}, {x = 151, y = 30, z = 151}):get_3d_map({x = 0, y = 0, z = 0})
+
+local c_end_stone = minetest.get_content_id("mcl_end:end_stone")
+
+local x_offset = mcl_vars.mg_end_platform_pos.x - 27
+local y_offset = -2
+
+minetest.register_on_generated(function(minp, maxp)
+	if maxp.y < (-27025 + y_offset) or minp.y > (-27000 + y_offset + 4) or maxp.x < (-75 + x_offset) or minp.x > (75 + x_offset) or maxp.z < -75 or minp.z > 75 then
+		return
+	end
+
+	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
+	local data = vm:get_data()
+	local area = VoxelArea:new({MinEdge = emin, MaxEdge = emax})
+
+	for idx in area:iter(math.max(minp.x, -75 + x_offset), math.max(minp.y, -27025 + y_offset + 4), math.max(minp.z, -75), math.min(maxp.x, 75 + x_offset), math.min(maxp.y, -27000 + y_offset), math.min(maxp.z, 75)) do
+		local pos = area:position(idx)
+		local y = 27025 + pos.y - y_offset
+		if noisemap[pos.x + 75 - x_offset + 1][y + 1][pos.z + 75 + 1] > (math.abs(1 - y / 25) ^ 2 + math.abs((pos.x - x_offset) / 75) ^ 2 + math.abs(pos.z / 75) ^ 2) then
+			data[idx] = c_end_stone
+		end
+	end
+
+	vm:set_data(data)
+	vm:calc_lighting()
+	vm:update_liquids()
+	vm:write_to_map()
+end)

mods/MAPGEN/mcl_end_island/mod.conf

@@ -0,0 +1,4 @@
+name = mcl_end_island
+author = Fleckenstein
+depends = mcl_mapgen_core, mcl_end
+description = Generate the end main island for MCL2