stone planet

init.lua

@@ -18,6 +18,7 @@ dofile(MP.."/nodes/sun.lua")
 dofile(MP.."/planets/classh.lua")
 dofile(MP.."/planets/classp.lua")
 dofile(MP.."/planets/classm.lua")
+dofile(MP.."/planets/classn.lua")
 dofile(MP.."/planets/sun.lua")
 
 print("[OK] Planetoidgen")

planets/classn.lua

@@ -0,0 +1,65 @@
+
+local c_shell = minetest.get_content_id("default:stone")
+local c_top = minetest.get_content_id("default:stone")
+
+
+planetoidgen.planettypes["class-n"] = function(planet, minp, maxp, seed)
+
+	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
+	local data = vm:get_data()
+	local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
+
+	for z=minp.z,maxp.z do
+	for x=minp.x,maxp.x do
+	for y=minp.y,maxp.y do
+			local i = area:index(x,y,z)
+
+			local pos = area:position(i)
+			local distance_to_center = vector.distance(pos, planet.pos)
+
+			-- check if inside radius
+			if distance_to_center <= planet.radius then
+
+				local is_outer_shell = pos.y < planet.pos.y
+				local is_top = pos.y == planet.pos.y
+
+				if is_outer_shell then
+					data[i] = c_shell
+
+				elseif is_top then
+					data[i] = c_top
+
+				end
+
+			end -- distance check
+	end--y
+	end--x
+	end--z
+
+
+	vm:set_data(data)
+
+	if minp.y < planet.pos.y then
+		print("[planetoidgen] generating ores for " .. minetest.pos_to_string(minp))
+		-- generate ores
+		minetest.generate_ores(vm, minp, {
+			x = maxp.x,
+			y = math.min(maxp.y, planet.pos.y-1),
+			z = maxp.z
+		})
+
+	end
+	if minp.y <= planet.pos.y and maxp.y >= planet.pos.y then
+		print("[planetoidgen] generating decos for " .. minetest.pos_to_string(minp))
+		-- generate decorations
+		minetest.generate_decorations(vm, {
+			x = minp.x, y = planet.pos.y-20, z=minp.z
+		}, {
+			x = maxp.x, y = planet.pos.y+10, z=maxp.z
+		})
+
+	end
+
+	vm:set_lighting({day=15, night=0})
+	vm:write_to_map()
+end

readme.md

@@ -5,6 +5,7 @@
 See: https://en.wikipedia.org/wiki/Star_Trek_planet_classification
 
 * `class-m` earth like, flat (various dirt top layers and stone body)
+* `class-n` all stone, flat
 * `class-h` desert planet (desert-sand top layer and desert-sandstone body)
 * `class-p` ice planet (snowblock top layer and ice body)
 * `sun` radioactive sun (single lava-like node)