make seed a normal generation option, use es6 default parameters, add superflat (thanks @demipixel)

app.js

@@ -14,8 +14,7 @@ var options = {
   commands: commands,
   logging:settings.logging,
   kickTimeout:10*60*1000,
-  generation:settings.generation,
+  generation:settings.generation
-  seed:settings.seed
 };
 
 mcServer.createMCServer(options);

src/lib/serverPlugins/world.js

@@ -4,13 +4,14 @@ var Vec3 = require('vec3');
 
 var generations={
   'grass_field':require("../worldGenerations/grass_field"),
-  'diamond_square':require("../worldGenerations/diamond_square")
+  'diamond_square':require("../worldGenerations/diamond_square"),
+  'superflat':require("../worldGenerations/superflat")
 };
 
 module.exports = inject;
 
 function inject(serv,options) {
-  var seed=options.seed || Math.random()*Math.pow(2, 32);
+  options["generation"].options.seed=options["generation"].options.seed || Math.random()*Math.pow(2, 32);
-  serv.emit("seed",seed);
+  serv.emit("seed",options["generation"].options.seed);
-  serv.world = new World(generations[options["generation"].name](seed,options["generation"].options));
+  serv.world = new World(generations[options["generation"].name](options["generation"].options));
 }

src/lib/worldGenerations/diamond_square.js

@@ -93,8 +93,7 @@ function DiamondSquare(size, roughness, seed) {
   }
 }
 
-function generation(seed, options) {
+function generation({seed,worldHeight=80}={}) {
-  var worldHeight=options.worldHeight || 80;
 // Selected empirically
   var size = 10000000;
   var space = new DiamondSquare(size, size / 1000, seed);

src/lib/worldGenerations/grass_field.js

@@ -1,7 +1,7 @@
 var Chunk = require('prismarine-chunk')(require("../version"));
 var Vec3 = require('vec3');
 
-function generation(seed,options) {
+function generation() {
   function generateSimpleChunk(chunkX, chunkZ) {
     var chunk = new Chunk();
 

src/lib/worldGenerations/superflat.js

@@ -0,0 +1,32 @@
+var Chunk = require('prismarine-chunk')(require("../version"));
+var Vec3 = require('vec3');
+
+function generation({opt='default',bottom_id=7,middle_id=1,top_id=2,middle_thickness=3,debug=false}={}) {
+  function generateChunk(chunkX,chunkZ) {
+    var chunk=new Chunk();
+    var height = middle_thickness + 1;
+    var DEBUG_POINTS = [new Vec3(0, height, 0), new Vec3(15, height, 0), new Vec3(0, height, 15), new Vec3(15, height, 15)];
+    for (var x = 0; x < 16; x++) {
+      for (var z = 0; z < 16; z++) {
+        for (var y = 0; y < middle_thickness + 2; y++) {
+          if (y == 0) chunk.setBlockType(new Vec3(x, y, z), bottom_id);
+          else if (y < middle_thickness + 1) chunk.setBlockType(new Vec3(x, y, z), middle_id);
+          else chunk.setBlockType(new Vec3(x, y, z), top_id);
+        }
+        for (y = 0; y < 256; y++) {
+          chunk.setSkyLight(new Vec3(x, y, z), 15);
+        }
+      }
+    }
+
+    if (debug) {
+      for (var d in DEBUG_POINTS) {
+        chunk.setBlockType(DEBUG_POINTS[d], 35);
+      }
+    }
+    return chunk;
+  }
+  return generateChunk;
+}
+
+module.exports=generation;