Add all files needed for engine into main branch

source/scripts/base.js

@@ -0,0 +1,609 @@
+/* Prototypes out an object and extends with values */
+function clone(proto, binds) {
+  var c = Object.create(proto);
+  complete_assign(c, binds);
+  return c;
+};
+
+/* Prototypes out an object and assigns values */
+function copy(proto, binds) {
+  var c = Object.create(proto);
+  Object.assign(c, binds);
+  return c;
+};
+
+/* OBJECT DEFININTIONS */
+Object.defineProperty(Object.prototype, 'getOwnPropertyDescriptors', {
+  value: function() {
+    var obj = {};
+    for (var key in this) {
+      obj[key] = Object.getOwnPropertyDescriptor(this, key);
+    }
+
+    return obj;
+  }
+});
+
+Object.defineProperty(Object.prototype, 'hasOwn', {
+  value: function(x) { return this.hasOwnProperty(x); }
+});
+
+Object.defineProperty(Object.prototype, 'array', {
+  value: function() {
+    var a = [];
+    for (var key in this)
+      a.push(this[key]);
+
+    return a;
+  },
+});
+
+Object.defineProperty(Object.prototype, 'defn', {
+  value: function(name, val) {
+    Object.defineProperty(this, name, { value:val, writable:true, configurable:true });
+  }
+});
+
+Object.defineProperty(Object.prototype, 'nulldef', {
+  value: function(name, val) {
+    if (!this.hasOwnProperty(name)) this[name] = val;
+  }
+});
+
+/* defc 'define constant'. Defines a value that is not writable. */
+Object.defineProperty(Object.prototype, 'defc', {
+  value: function(name, val) {
+    Object.defineProperty(this,name, {
+      value: val,
+      writable:false,
+      enumerable:true,
+      configurable:false,
+    });
+  }
+});
+
+Object.defineProperty(Object.prototype, 'deflock', {
+  value: function(prop) {
+    Object.defineProperty(this,prop, {configurable:false});
+  }
+});
+
+Object.defineProperty(Object.prototype, 'forEach', {
+  value: function(fn) {
+    for (var key in this)
+      fn(this[key]);
+  }
+});
+
+
+Object.defineProperty(Object.prototype, 'empty', {
+  get: function() {
+    return Object.keys(this).empty;
+  },
+});
+
+Object.defineProperty(Object.prototype, 'nth', {
+  value: function(x) {
+    if (this.empty || x >= Object.keys(this).length) return null;
+
+    return this[Object.keys(this)[x]];
+  },
+});
+
+Object.defineProperty(Object.prototype, 'findIndex', {
+  value: function(x) {
+    var i = 0;
+    for (var key in this) {
+      if (this[key] === x) return i;
+      i++;
+    }
+
+    return -1;
+  }
+});
+
+
+/* STRING DEFS */
+
+Object.defineProperty(String.prototype, 'next', {
+  value: function(char, from) {
+    if (!Array.isArray(char))
+      char = [char];
+    if (from > this.length-1)
+      return -1;
+    else if (!from)
+      from = 0;
+
+    var find = this.slice(from).search(char[0]);
+
+    if (find === -1)
+      return -1;
+    else
+      return from + find;
+    
+    var i = 0;
+    var c = this.charAt(from+i);
+    while (!char.includes(c)) {
+      i++;
+      if (from+i >this.length-1) return -1;
+      c = this.charAt(from+i);
+    }
+
+    return from+i;
+  }
+});
+
+Object.defineProperty(String.prototype, 'prev', {
+  value: function(char, from, count) {
+    if (from > this.length-1)
+      return -1;
+    else if (!from)
+      from = this.length-1;
+
+    if (!count) count = 0;
+
+    var find = this.slice(0,from).lastIndexOf(char);
+
+    while (count > 1) {
+      find = this.slice(0,find).lastIndexOf(char);
+      count--;
+    }
+
+    if (find === -1)
+      return 0;
+    else
+      return find;
+  }
+});
+
+Object.defineProperty(String.prototype, 'shift', {
+  value: function(n) {
+    if (n === 0) return this.slice();
+
+    if (n > 0)
+      return this.slice(n);
+
+    if (n < 0)
+      return this.slice(0, this.length+n);
+  }
+});
+
+
+/* ARRAY DEFS */
+
+Object.defineProperty(Array.prototype, 'copy', {
+  value: function() {
+    var c = [];
+
+    this.forEach(function(x, i) {
+      c[i] = deep_copy(x);
+    });
+    
+    return c;
+  }
+});
+
+Object.defineProperty(Array.prototype, 'rotate', {
+  value: function(a) {
+    return Vector.rotate(this, a);
+  }
+});
+
+
+Object.defineProperty(Array.prototype, '$add', {
+value: function(b) {
+  for (var i = 0; i < this.length; i++) {
+    this[i] += b[i];
+  }
+}});
+
+function setelem(n) {
+  return {
+    get: function() { return this[n]; },
+    set: function(x) { this[n] = x; }
+  }
+};
+
+function arrsetelem(str, n)
+{
+  Object.defineProperty(Array.prototype, str, setelem(n));
+}
+
+Object.defineProperty(Array.prototype, 'x', setelem(0));
+Object.defineProperty(Array.prototype, 'y', setelem(1));
+Object.defineProperty(Array.prototype, 'z', setelem(2));
+Object.defineProperty(Array.prototype, 'w', setelem(3));
+arrsetelem('r', 0);
+arrsetelem('g', 1);
+arrsetelem('b', 2);
+arrsetelem('a', 3);
+
+
+Object.defineProperty(Array.prototype, 'add', {
+value: function(b) {
+  var c = [];
+  for (var i = 0; i < this.length; i++) { c[i] = this[i] + b[i]; }
+  return c;
+}});
+
+Object.defineProperty(Array.prototype, 'newfirst', {
+  value: function(i) {
+    var c = this.slice();
+    if (i >= c.length) return c;
+
+    do {
+      c.push(c.shift());
+      i--;
+    } while (i > 0);
+
+    return c;
+  }
+});
+
+Object.defineProperty(Array.prototype, 'doubleup', {
+  value: function(n) {
+    var c = [];
+    this.forEach(function(x) {
+      for (var i = 0; i < n; i++)
+        c.push(x);
+    });
+    
+    return c;
+  }
+});
+
+Object.defineProperty(Array.prototype, 'sub', {
+value: function(b) {
+  var c = [];
+  for (var i = 0; i < this.length; i++) { c[i] = this[i] - b[i]; }
+  return c;
+}});
+
+Object.defineProperty(Array.prototype, 'apply', {
+  value: function(fn) {
+    this.forEach(function(x) { x[fn].apply(x); });
+  }
+});
+
+Object.defineProperty(Array.prototype, 'scale', {
+  value: function(s) {
+    return this.map(function(x) { return x*s; });
+}});
+
+Object.defineProperty(Array.prototype, 'equal', {
+value: function(b) {
+  if (this.length !== b.length) return false;
+  if (b == null) return false;
+  if (this === b) return true;
+
+  return JSON.stringify(this) === JSON.stringify(b);
+  
+  for (var i = 0; i < this.length; i++) {
+    if (!this[i] === b[i])
+      return false;
+  }
+
+  return true;
+}});
+
+function add(x,y) { return x+y; };
+function mult(x,y) { return x*y; };
+
+Object.defineProperty(Array.prototype, 'mapc', {
+  value: function(fn, arr) {
+      return this.map(function(x, i) {
+        return fn(x, arr[i]);
+      });
+  }
+});
+
+Object.defineProperty(Array.prototype, 'remove', {
+ value: function(b) {
+  var idx = this.indexOf(b);
+  
+  if (idx === -1) return false;
+  
+  this.splice(idx, 1);
+
+  return true;
+}});
+
+Object.defineProperty(Array.prototype, 'set', {
+  value: function(b) {
+    if (this.length !== b.length) return;
+
+    b.forEach(function(val, i) { this[i] = val; }, this);
+  }
+});
+
+Object.defineProperty(Array.prototype, 'flat', {
+  value: function() {
+    return [].concat.apply([],this);
+  }
+});
+
+Object.defineProperty(Array.prototype, 'any', {
+  value: function(fn) {
+    var ev = this.every(function(x) {
+      return !fn(x);
+    });
+    return !ev;
+  }
+});
+
+/* Return true if array contains x */
+/*Object.defineProperty(Array.prototype, 'includes', {
+value: function(x) {
+  return this.some(e => e === x);
+}});
+*/
+Object.defineProperty(Array.prototype, 'empty', {
+  get: function() { return this.length === 0; },
+});
+
+Object.defineProperty(Array.prototype, 'push_unique', {
+  value: function(x) {
+  if (!this.includes(x)) this.push(x);
+}});
+
+Object.defineProperty(Array.prototype, 'unique', {
+  value: function() {
+    var c = [];
+    this.forEach(function(x) { c.push_unique(x); });
+    return c;
+  }
+});
+
+
+Object.defineProperty(Array.prototype, 'findIndex', {
+ value: function(fn) {
+  var idx = -1;
+  this.every(function(x, i) {
+    if (fn(x)) {
+      idx = i;
+      return false;
+    }
+
+    return true;
+  });
+
+  return idx;
+}});
+
+Object.defineProperty(Array.prototype, 'find', {
+ value: function(fn) {
+  var ret;
+
+  this.every(function(x) {
+    if (fn(x)) {
+      ret = x;
+      return false;
+    }
+
+    return true;
+  });
+
+  return ret;
+}});
+
+Object.defineProperty(Array.prototype, 'last', {
+  get: function() { return this[this.length-1]; },
+});
+
+Object.defineProperty(Array.prototype, 'at', {
+value: function(x) {
+  return x < 0 ? this[this.length+x] : this[x];
+}});
+
+Object.defineProperty(Array.prototype, 'wrapped', {
+  value: function(x) {
+    var c = this.slice(0, this.length);
+
+    for (var i = 0; i < x; i++)
+      c.push(this[i]);
+      
+    return c;
+}});
+
+Object.defineProperty(Array.prototype, 'wrap_idx', {
+  value: function(x) {
+    while (x >= this.length) {
+      x -= this.length;
+    }
+
+    return x;
+  }
+});
+
+Object.defineProperty(Array.prototype, 'mirrored', {
+  value: function(x) {
+    var c = this.slice(0);
+    if (c.length <= 1) return c;
+    for (var i = c.length-2; i >= 0; i--)
+      c.push(c[i]);
+
+    return c;
+  }
+});
+
+
+/* MATH EXTENSIONS */
+
+Math.clamp = function (x, l, h) { return x > h ? h : x < l ? l : x; }
+
+Math.lerp = function (s, f, dt) {
+  return s + (Math.clamp(dt, 0, 1) * (f - s));
+};
+
+Math.snap = function(val, grid) {
+  if (!grid || grid === 1) return Math.round(val);
+
+  var rem = val%grid;
+  var d = val - rem;
+  var i = Math.round(rem/grid)*grid;
+  return d+i;
+}
+
+Math.angledist = function (a1, a2) {
+    var dist = a2 - a1;
+    var wrap = dist >= 0 ? dist+360 : dist-360;
+    wrap %= 360;
+
+    if (Math.abs(dist) < Math.abs(wrap))
+      return dist;
+
+    return wrap;
+};
+
+Math.deg2rad = function(deg) { return deg * 0.0174533; }
+Math.rad2deg = function(rad) { return rad / 0.0174533; }
+
+/* BOUNDINGBOXES */
+function cwh2bb(c, wh) {
+  return {
+    t: c.y+wh.y/2,
+    b: c.y-wh.y/2,
+    l: c.x-wh.x/2,
+    r: c.x+wh.x/2
+  };
+};
+
+function points2bb(points) {
+    var b= {t:0,b:0,l:0,r:0};
+    
+    points.forEach(function(x) {
+      if (x.y > b.t) b.t = x.y;
+      if (x.y < b.b) b.b = x.y;
+      if (x.x > b.r) b.r = x.x;
+      if (x.x < b.l) b.l = x.x;
+    });
+    
+    return b;
+};
+
+
+function bb2cwh(bb) {
+  if (!bb) return undefined;
+  var cwh = {};
+
+  var w = bb.r - bb.l;
+  var h = bb.t - bb.b;
+  cwh.wh = [w, h];
+  cwh.c = [bb.l + w/2, bb.b + h/2];
+  
+  return cwh;
+};
+
+function bb_expand(oldbb, x) {
+  if (!oldbb || !x) return;
+  var bb = {};
+  Object.assign(bb, oldbb);
+  
+  if (bb.t < x.t) bb.t = x.t;
+  if (bb.r < x.r) bb.r = x.r;
+  if (bb.b > x.b) bb.b = x.b;
+  if (bb.l > x.l) bb.l = x.l;
+
+  return bb;
+};
+
+function bb_draw(bb, color) {
+  if (!bb) return;
+  var draw = bb2cwh(bb);
+  draw.wh[0] /= editor.camera.zoom;
+  draw.wh[1] /= editor.camera.zoom;
+  Debug.box(world2screen(draw.c), draw.wh, color);
+};
+
+function bb_from_objects(objs) {
+  var bb = objs[0].boundingbox;
+  objs.forEach(function(obj) { bb = bb_expand(bb, obj.boundingbox); });
+  return bb;
+};
+
+
+/* VECTORS */
+var Vector = {
+  x: 0,
+  y: 0,
+  length(v) {
+    var sum = v.reduce(function(acc, val) { return acc + val**2; }, 0);
+    return Math.sqrt(sum);
+  },
+  norm(v) {
+    var len = Vector.length(v);
+    return [v.x/len, v.y/len];
+    
+  },
+  make(x, y) {
+    var vec = Object.create(this, {x:x, y:y});
+  },
+
+  project(a, b) {
+    return cmd(85, a, b);
+  },
+
+  dot(a, b) {
+
+  },
+  
+  random() {
+    var vec = [Math.random()-0.5, Math.random()-0.5];
+    return Vector.norm(vec);
+  },
+  
+  angle(v) {
+    return Math.atan2(v.y, v.x);
+  },
+  
+  rotate(v,angle) {
+    var r = Vector.length(v);
+    var p = Vector.angle(v) + angle;
+    return [r*Math.cos(p), r*Math.sin(p)];
+  },
+
+  equal(v1, v2, tol) {
+    if (!tol)
+      return v1.equal(v2);
+
+    var eql = true;
+    var c = v1.sub(v2);
+
+    c.forEach(function(x) {
+      if (!eql) return;
+      if (Math.abs(x) > tol)
+        eql = false;
+    });
+
+    return eql;
+  },
+  
+};
+
+/* POINT ASSISTANCE */
+
+function points2cm(points)
+{
+  var x = 0;
+  var y = 0;
+  var n = points.length;
+  points.forEach(function(p) {
+    x = x + p[0];
+    y = y + p[1];
+  });
+  
+  return [x/n,y/n];
+};
+
+function sortpointsccw(points)
+{
+  var cm = points2cm(points);
+  var cmpoints = points.map(function(x) { return x.sub(cm); });
+  var ccw = cmpoints.sort(function(a,b) {
+    aatan = Math.atan2(a.y, a.x);
+    batan = Math.atan2(b.y, b.x);
+    return aatan - batan;
+  });
+  
+  return ccw.map(function(x) { return x.add(cm); });
+}

source/scripts/components.js

@@ -0,0 +1,657 @@
+var component = {
+  toString() {
+    if ('gameobject' in this)
+      return this.name + " on " + this.gameobject;
+    else
+      return this.name;
+  },
+  name: "component",
+  component: true,
+  set enabled(x) { },
+  get enabled() { },
+  enable() { this.enabled = true; },
+  disable() { this.enabled = false; },
+  
+  make(go) { },
+  kill() { Log.info("Kill not created for this component yet"); },
+  gui() { },
+  gizmo() { },
+  
+  prepare_center() {},
+  finish_center() {},
+  clone(spec) {
+    return clone(this, spec);
+  },
+};
+
+var sprite = clone(component, {
+  name: "sprite",
+  path: "",
+  _pos: [0, 0],
+  get layer() {
+    if (!this.gameobject)
+      return 0;
+    else
+      return this.gameobject.draw_layer;
+  },
+  
+  get pos() { return this._pos; },
+  set pos(x) {
+    this._pos = x;
+    this.sync();
+  },
+  
+  get boundingbox() {
+    if (!this.gameobject) return null;
+    var dim = cmd(64, this.path);
+    dim = dim.scale(this.gameobject.scale);
+    var realpos = this.pos.copy();
+    realpos.x *= dim.x;
+    realpos.y *= dim.y;
+    realpos.x += (dim.x/2);
+    realpos.y += (dim.y/2);
+    return cwh2bb(realpos, dim);
+  },
+
+  set asset(x) {
+    if (!x) return;
+    if (!x.endsWith(".png")) {
+      Log.error("Can't set texture to a non image.");
+      return;
+    }
+
+    this.path = x;
+    Log.info("path is now " + x);
+    this.sync();
+  },
+
+  _enabled: true,
+  set enabled(x) { this._enabled = x; cmd(20, this.id, x); },
+  get enabled() { return this._enabled; return cmd(21, this.id); },
+  get visible() { return this.enabled; },
+  set visible(x) { this.enabled = x; },
+  
+  _angle: 0,
+  get angle() { return this._angle; },
+  set angle(x) {
+    this._angle = x;
+    sync();
+  },
+
+  make(go) {
+    var sprite = clone(this);
+    Object.defineProperty(sprite, 'id', {value:make_sprite(go,this.path,this.pos)});
+    sprite.sync();
+    return sprite;
+  },
+  
+  rect: {s0:0, s1: 1, t0: 0, t1: 1},
+
+  sync() {
+    if (!this.hasOwn('id')) return;
+    cmd(60, this.id, this.layer);
+    cmd(37, this.id, this.pos);
+    cmd(12, this.id, this.path, this.rect);
+  },
+
+  load_img(img) {
+    cmd(12, this.id, img);
+  },
+
+  kill() {
+    cmd(9, this.id);
+  },
+});
+
+/* Container to play sprites and anim2ds */
+var char2d = clone(sprite, {
+  clone(anims) {
+    var char = clone(this);
+    char.anims = anims;
+    return char;
+  },
+  
+  name: "char 2d",
+  
+  frame2rect(frames, frame) {
+    var rect = {s0:0,s1:1,t0:0,t1:1};
+    
+    var frameslice = 1/frames;
+    rect.s0 = frameslice*frame;
+    rect.s1 = frameslice*(frame+1);
+    return rect;
+  },
+  
+  make(go) {
+    var char = clone(this);
+    char.curplaying = char.anims.array()[0];
+    Object.defineProperty(char, 'id', {value:make_sprite(go,this.path,this.pos)});
+    char.frame = 0;
+    char.timer = timer.make(char.advance, 1/char.curplaying.fps, char);
+    char.timer.loop = true;
+    char.rect = char.frame2rect(char.curplaying.frames, char.frame);
+    char.setsprite();
+    return char;
+  },
+  
+  frame: 0,
+  
+  play(name) {
+    if (!(name in this.anims)) {
+      Log.info("Can't find an animation named " + name);
+      return;
+    }
+    
+    if (this.curplaying === this.anims[name]) return;
+    
+    this.curplaying = this.anims[name];
+    this.timer.time = 1/this.curplaying.fps;
+    this.timer.start();
+    this.frame = 0;
+    this.setsprite();
+  },
+  
+  setsprite() {
+    this.path = this.curplaying.path;
+    this.rect = this.frame2rect(this.curplaying.frames, this.frame);
+    cmd(12, this.id, this.path, this.rect);
+  },
+
+  advance() {
+    this.frame = (this.frame + 1) % this.curplaying.frames;
+    this.setsprite();
+  },
+
+  devance() {
+    this.frame = (this.frame - 1);
+    if (this.frame === -1) this.frame = this.curplaying.frames-1;
+    this.setsprite();
+  },
+  
+  pause() {
+    this.timer.pause();
+  },
+
+  stop() {
+    this.frame = 0;
+    this.timer.stop();
+    this.setsprite();
+  },
+  
+  kill() {
+    this.timer.kill();
+    cmd(9, this.id);
+  },
+});
+
+/* For all colliders, "shape" is a pointer to a phys2d_shape, "id" is a pointer to the shape data */
+var collider2d = clone(component, {
+  name: "collider 2d",
+  
+  _sensor: false,
+  set sensor(x) {
+    this._sensor = x;
+    if (this.shape)
+      cmd(18, this.shape, x);
+  },
+  get sensor() { return this._sensor; },
+
+  input_s_pressed() {
+    if (!Keys.alt()) return;
+
+    this.sensor = !this.sensor;
+  },
+
+  input_t_pressed() {
+    if (!Keys.alt()) return;
+
+    this.enabled = !this.enabled;
+  },
+
+  coll_sync() {
+    cmd(18, this.shape, this.sensor);
+  },
+
+  _enabled: true,
+  set enabled(x) {this._enabled = x; if (this.id) cmd(22, this.id, x); },
+  get enabled() { return this._enabled; },
+  kill() {}, /* No killing is necessary - it is done through the gameobject's kill */
+
+  register_hit(fn, obj) {
+    register_collide(1, fn, obj, this.gameobject.body, this.shape);
+  },
+});
+
+
+var polygon2d = clone(collider2d, {
+  name: "polygon 2d",
+  points: [],
+  help: "Ctrl-click Add a point\nShift-click Remove a point",
+  clone(spec) {
+    var obj = Object.create(this);
+    obj.points = this.points.copy();
+    Object.assign(obj, spec);
+    return obj;
+  },
+
+  make(go) {
+    var poly = Object.create(this);
+    Object.assign(poly, make_poly2d(go, this.points));
+    Object.defineProperty(poly, 'id', {enumerable:false});
+    Object.defineProperty(poly, 'shape', {enumerable:false});
+
+    return poly;
+  },
+  
+  get boundingbox() {
+    if (!this.gameobject) return null;
+    var scaledpoints = [];
+    this.points.forEach(function(x) { scaledpoints.push(x.scale(this.gameobject.scale)); }, this);
+    return points2bb(scaledpoints);
+  },
+  
+  input_f10_pressed() {
+    this.points = sortpointsccw(this.points);
+  },
+
+  sync() {
+    if (!this.id) return;
+    cmd_poly2d(0, this.id, this.spoints);
+    this.coll_sync();
+  },
+  
+  input_b_pressed() {
+    if (!Keys.ctrl()) return;
+    
+    this.points = this.spoints;
+    this.mirrorx = false;
+    this.mirrory = false;
+  },
+  
+  get spoints() {
+    var spoints = this.points.slice();
+    
+    if (this.mirrorx) {
+      spoints.forEach(function(x) {
+        var newpoint = x.slice();
+	newpoint.x = -newpoint.x;
+        spoints.push(newpoint);
+      });
+    }
+    
+    if (this.mirrory) {
+      spoints.forEach(function(x) {
+        var newpoint = x.slice();
+	newpoint.y = -newpoint.y;
+	spoints.push(newpoint);
+      });
+    }
+    
+    return spoints;
+  },
+  
+  gizmo() {
+    if (!this.hasOwn('points')) this.points = this.__proto__.points.copy();
+    
+    this.spoints.forEach(function(x) {
+      Debug.point(world2screen(this.gameobject.this2world(x)), 3, Color.green);
+    }, this);
+    
+    this.points.forEach(function(x, i) {
+      Debug.numbered_point(this.gameobject.this2world(x), i);
+    }, this);
+    
+
+    this.sync();
+  },
+  
+  input_lmouse_pressed() {
+    if (Keys.ctrl()) {
+      this.points.push(this.gameobject.world2this(Mouse.worldpos));
+    } else if (Keys.shift()) {
+      var idx = grab_from_points(screen2world(Mouse.pos), this.points.map(this.gameobject.this2world,this.gameobject), 25);
+      if (idx === -1) return;
+      this.points.splice(idx, 1);
+    }
+  },
+
+  pick(pos) {
+    return Gizmos.pick_gameobject_points(pos, this.gameobject, this.points);
+  },
+  
+  query() {
+    return cmd(80, this.shape);
+  },
+  
+  mirrorx: false,
+  mirrory: false,
+  
+  input_m_pressed() {
+    if (Keys.ctrl())
+      this.mirrory = !this.mirrory;
+    else
+      this.mirrorx = !this.mirrorx;
+  },
+});
+
+var bucket = clone(collider2d, {
+  name: "bucket",
+  help: "Ctrl-click Add a point\nShift-click Remove a point\n+,- Increase/decrease spline segs\nCtrl-+,- Inc/dec spline degrees\nCtrl-b,v Inc/dec spline thickness",
+  clone(spec) {
+    var obj = Object.create(this);
+    obj.cpoints = this.cpoints.copy(); 
+    dainty_assign(obj, spec);
+    return obj;
+  },
+
+  cpoints:[],
+  degrees:2,
+  dimensions:2,
+  /* open: 0
+     clamped: 1
+     beziers: 2
+     looped: 3
+  */
+  type: 3,
+  
+  get boundingbox() {
+    if (!this.gameobject) return null;
+    var scaledpoints = [];
+    this.points.forEach(function(x) { scaledpoints.push(x.scale(this.gameobject.scale)); }, this);
+    return points2bb(scaledpoints);
+  },
+  
+  mirrorx: false,
+  mirrory: false,
+  
+  input_m_pressed() {
+    if (Keys.ctrl()) {
+      this.mirrory = !this.mirrory;
+    } else {
+      this.mirrorx = !this.mirrorx;
+    }
+    
+    this.sync();
+  },
+  
+  hollow: false,
+  input_h_pressed() {
+    this.hollow = !this.hollow;
+  },
+  
+  get spoints() {
+    var spoints = this.cpoints.slice();
+    
+    if (this.mirrorx) {
+      for (var i = spoints.length-1; i >= 0; i--) {
+        var newpoint = spoints[i].slice();
+	newpoint.x = -newpoint.x;
+        spoints.push(newpoint);
+      }
+    }
+    
+    if (this.mirrory) {
+      for (var i = spoints.length-1; i >= 0; i--) {
+        var newpoint = spoints[i].slice();
+	newpoint.y = -newpoint.y;
+	spoints.push(newpoint);
+      }
+    }
+
+    return spoints;
+
+    if (this.hollow) {
+      var hpoints = [];
+      var inflatep = inflate_cpv(spoints, spoints.length, this.hollowt);
+      inflatep[0].slice().reverse().forEach(function(x) { hpoints.push(x); });
+      
+      inflatep[1].forEach(function(x) { hpoints.push(x); });
+      return hpoints;
+    }
+    
+    return spoints;
+  },
+
+  hollowt: 0,
+
+  input_g_pressed() {
+    if (!Keys.ctrl()) return;
+    this.hollowt--;
+    if (this.hollowt < 0) this.hollowt = 0;
+  },
+
+  input_f_pressed() {
+    if (!Keys.ctrl()) return;
+    this.hollowt++;
+  },
+  
+  sample(n) {
+    var spoints = this.spoints;
+
+    this.degrees = Math.clamp(this.degrees, 1, spoints.length-1);
+    
+    if (spoints.length === 2)
+      return spoints;
+    if (spoints.length < 2)
+      return [];
+    if (this.degrees < 2) {
+      if (this.type === 3)
+        return spoints.wrapped(1);
+	
+      return spoints;
+    }
+
+    /*
+      order = degrees+1
+      knots = spoints.length + order
+      assert knots%order != 0
+    */
+
+    if (this.type === 3)
+      return spline_cmd(0, this.degrees, this.dimensions, 0, spoints.wrapped(this.degrees), n);
+
+    return spline_cmd(0, this.degrees, this.dimensions, this.type, spoints, n);
+  },  
+
+  samples: 10,
+  points:[],
+  
+  make(go) {
+    var edge = Object.create(this);
+    Object.assign(edge, make_edge2d(go, this.points, this.thickness));
+    Object.defineProperty(edge, 'id', {enumerable:false});
+    Object.defineProperty(edge, 'shape', {enumerable:false});
+    edge.defn('points', []);
+//    Object.defineProperty(edge, 'points', {enumerable:false});
+    edge.sync();
+    return edge;
+  },
+  
+  sync() {
+    if (!this.gameobject) return;
+    this.points = this.sample(this.samples);
+    cmd_edge2d(0, this.id, this.points);
+    cmd_edge2d(1, this.id, this._thickness * this.gameobject.scale);
+    this.coll_sync();
+  },
+
+  gizmo() {
+    if (!this.hasOwn('cpoints')) this.cpoints = this.__proto__.cpoints.copy();
+    
+    this.spoints.forEach(function(x) {
+      Debug.point(world2screen(this.gameobject.this2world(x)), 3, Color.green);
+    }, this);
+    
+    this.cpoints.forEach(function(x, i) {
+      Debug.numbered_point(this.gameobject.this2world(x), i);
+    }, this);
+    
+    this.sync();
+  },
+ 
+  _thickness:0, /* Number of pixels out the edge is */
+  get thickness() { return this._thickness; },
+  set thickness(x) {
+    this._thickness = Math.max(x, 0);
+    cmd_edge2d(1, this.id, this._thickness);
+  },
+
+  input_v_pressrep() {
+    if (!Keys.alt()) return;
+    this.thickness--;
+  },
+
+  input_b_pressrep() {
+    if (Keys.alt()) {
+      this.thickness++;
+    } else if (Keys.ctrl()) {
+      this.cpoints = this.spoints;
+      this.mirrorx = false;
+      this.mirrory = false;
+    }
+  },
+  
+  finish_center(change) {
+    this.cpoints = this.cpoints.map(function(x) { return x.sub(change); });
+    this.sync();
+  },
+  
+
+  input_plus_pressrep() {
+    if (Keys.ctrl())
+      this.degrees++;
+    else
+      this.samples += 1;
+  },
+  
+  input_minus_pressrep() {
+    if (Keys.ctrl())
+      this.degrees--;
+    else {
+      this.samples -= 1;
+      if (this.samples < 1) this.samples = 1;
+    }
+  },
+
+  input_r_pressed() {
+    if (!Keys.ctrl()) return;
+
+    this.cpoints = this.cpoints.reverse();
+  },
+
+  input_l_pressed() {
+    if (!Keys.ctrl()) return;
+    this.type = 3;
+  },
+
+  input_c_pressed() {
+    if (!Keys.ctrl()) return;
+    this.type = 1;
+  }, 
+
+  input_o_pressed() {
+    if (!Keys.ctrl()) return;
+    this.type = 0;
+  },
+
+  input_lmouse_pressed() {
+    if (Keys.ctrl()) {
+      if (Keys.alt()) {
+        var idx = grab_from_points(Mouse.worldpos, this.cpoints.map(this.gameobject.world2this,this.gameobject), 25);
+	if (idx === -1) return;
+
+	this.cpoints = this.cpoints.newfirst(idx);
+	return;
+      }
+      var idx = 0;
+
+      if (this.cpoints.length >= 2) {
+        idx = cmd(59, screen2world(Mouse.pos).sub(this.gameobject.pos), this.cpoints, 1000);
+	if (idx === -1) return;
+      }
+
+      if (idx === this.cpoints.length)
+        this.cpoints.push(this.gameobject.world2this(screen2world(Mouse.pos)));
+      else
+        this.cpoints.splice(idx, 0, this.gameobject.world2this(screen2world(Mouse.pos)));
+      return;
+    } else if (Keys.shift()) {
+      var idx = grab_from_points(screen2world(Mouse.pos), this.cpoints.map(function(x) {return x.add(this.gameobject.pos); }, this), 25);
+      if (idx === -1) return;
+
+      this.cpoints.splice(idx, 1);
+    }
+  },
+
+  pick(pos) { return Gizmos.pick_gameobject_points(pos, this.gameobject, this.cpoints); },
+
+  input_lbracket_pressrep() {
+    var np = [];
+
+    this.cpoints.forEach(function(c) {
+      np.push(Vector.rotate(c, Math.deg2rad(-1)));
+    });
+
+    this.cpoints = np;
+  },
+
+  input_rbracket_pressrep() {
+    var np = [];
+
+    this.cpoints.forEach(function(c) {
+      np.push(Vector.rotate(c, Math.deg2rad(1)));
+    });
+
+    this.cpoints = np;
+  },
+});
+
+var circle2d = clone(collider2d, {
+  name: "circle 2d",
+  get radius() {
+    return this.rradius;
+  },
+  rradius: 10,
+  set radius(x) {
+   this.rradius = x;
+   cmd_circle2d(0, this.id, this.rradius);
+  },
+  
+  get boundingbox() {
+    if (!this.gameobject) return null;
+    var radius = this.radius*2*this.gameobject.scale;
+    return cwh2bb(this.offset.scale(this.gameobject.scale), [radius, radius]);
+  },
+
+  get scale() { return this.radius; },
+  set scale(x) { this.radius = x; },
+  
+  ofset: [0,0],
+  get offset() { return this.ofset; },
+  set offset(x) { this.ofset = x; cmd_circle2d(1, this.id, this.ofset); },
+  
+  get pos() { return this.ofset; },
+  set pos(x) { this.offset = x; },
+    
+  make(go) {
+    var circle = clone(this);
+    var circ = make_circle2d(go, circle.radius, circle.offset);
+    Object.assign(circle, circ);
+    Object.defineProperty(circle, 'id', {enumerable:false});
+    Object.defineProperty(circle, 'shape', {enumerable:false});
+    return circle;
+  },
+
+  gui() {
+    Nuke.newline();
+    Nuke.label("circle2d");
+    this.radius = Nuke.pprop("Radius", this.radius);
+    this.offset = Nuke.pprop("offset", this.offset);
+  },
+
+  sync() {
+    cmd_circle2d(0, this.id, this.rradius);
+    cmd_circle2d(-1, this.id);
+    this.coll_sync();  
+  },
+});

source/scripts/debug.js

@@ -0,0 +1,207 @@
+var Gizmos = {
+  pick_gameobject_points(worldpos, gameobject, points) {
+    var idx = grab_from_points(worldpos, points.map(gameobject.this2world,gameobject), 25);
+    if (idx === -1) return null;
+    return points[idx];
+  },
+};
+
+
+var Debug = {
+  draw_grid(width, span) {
+    cmd(47, width, span);
+  },
+  
+  point(pos, size, color) {
+    color = color ? color : Color.blue;
+    cmd(51, pos, size,color);
+  },
+  
+  arrow(start, end, color, capsize) {
+    color = color ? color : Color.red;
+    if (!capsize)
+      capsize = 4;
+    cmd(81, start, end, color, capsize);
+  },
+  
+  box(pos, wh, color) {
+    color = color ? color : Color.white;
+    cmd(53, pos, wh, color);
+  },
+
+  numbered_point(pos, n) {
+    Debug.point(world2screen(pos), 3);
+    gui_text(n, world2screen(pos).add([0,4]), 1);
+  },
+
+  phys_drawing: false,
+  draw_phys(on) {
+    this.phys_drawing = on;
+    cmd(4, this.phys_drawing);
+  },
+
+  draw_obj_phys(obj) {
+    cmd(82, obj.body);
+  },
+
+  register_call(fn, obj) {
+    register_debug(fn,obj);
+  },
+
+  print_callstack() {
+    for (var i = -3;; i--) {
+      var t = Duktape.act(i);
+      if (!t) break;
+      var file = t.function ? t.function.fileName : "";
+      var line = t.lineNumber;
+      Log.info(file + ":" + line);
+    }
+  },
+
+  line(points, color, type) {
+    if (!type)
+      type = 0;
+
+    if (!color)
+      color = Color.white;
+      
+    switch (type) {
+      case 0:
+        cmd(83, points, color);
+    }
+  },
+};
+
+var Gizmos = {
+  pick_gameobject_points(worldpos, gameobject, points) {
+    var idx = grab_from_points(worldpos, points.map(gameobject.this2world,gameobject), 25);
+    if (idx === -1) return null;
+    return points[idx];
+  },
+};
+
+
+var Nuke = {
+  newline(cols) { nuke(3, cols ? cols : 1); },
+  newrow(height) { nuke(13,height); },
+  
+  wins: {},
+  curwin:"",
+  
+  prop(str, v) {
+    var ret = nuke(2, str, v);
+    if (Number.isFinite(ret)) return ret;
+    return 0;
+  },
+
+  treeid: 0,
+
+  tree(str) { var on = nuke(11, str, this.treeid); this.treeid++; return on; },
+  tree_pop() { nuke(12);},
+
+  prop_num(str, num) { return nuke(2, str, num, -1e10, 1e10, 0.01); },
+  prop_bool(str, val) { return nuke(4, str, val); },
+  checkbox(val) { return nuke(4,"",val); },
+  label(str) { nuke(5, str); },
+  textbox(str) { return nuke(7, str); },
+  scrolltext(str) { nuke(14,str); },
+  
+  defaultrect: { x:10, y:10, w:400, h:600 },
+  window(name) {
+    this.curwin = name;
+    var rect;
+    if (name in this.wins)
+      rect = this.wins[name];
+    else
+      rect = { x:10, y:10, w:400, h:600 };
+
+    nuke(0, name, rect);
+  },
+  button(name) { return nuke(6, name); },
+  radio(name, val, cmp) { return nuke(9, name, val, cmp); },
+  img(path) { nuke(8, path); },
+  end() {
+    this.wins[this.curwin] = nuke(10);
+    this.treeid = 0;
+    nuke(1);
+  },
+
+  pprop(str, p, nonew) {
+    switch(typeof p) {
+      case 'number':
+        if (!nonew) Nuke.newline();
+        return Nuke.prop_num(str, p);
+	break;
+
+      case 'boolean':
+        if (!nonew) Nuke.newline();
+        return Nuke.prop_bool(str, p);
+
+      case 'object':
+        if (Array.isArray(p)) {
+	  var arr = [];
+          Nuke.newline(p.length+1);
+	  Nuke.label(str);
+	  arr[0] = Nuke.pprop("#x", p[0], true);
+	  arr[1] = Nuke.pprop("#y", p[1], true);
+	  return arr;
+	
+        } else {
+          if (!nonew)Nuke.newline(2);
+  	  Nuke.label(str);
+          Nuke.label(p);
+        }
+	break;
+
+      case 'string':
+        if (!nonew) Nuke.newline();
+        Nuke.label(str);
+        return Nuke.textbox(p);
+
+      default:
+        if (!nonew) Nuke.newline(2);
+        Nuke.label(str);
+        Nuke.label(p);
+     }
+  },
+};
+
+Object.defineProperty(Nuke, "curwin", {enumerable:false});
+Object.defineProperty(Nuke, "defaultrect", {enumerable:false});
+
+
+var Log = {
+  print(msg, lvl) {
+    var lg;
+    if (typeof msg === 'object') {
+      lg = JSON.stringify(msg, null, 2);
+    } else {
+      lg = msg;
+    }
+
+    var stack = (new Error()).stack;
+    var n = stack.next('\n',0)+1;
+    n = stack.next('\n', n)+1;
+    var nnn = stack.slice(n);
+    var fmatch = nnn.match(/\(.*\:/);
+    var file = fmatch ? fmatch[0].shift(1).shift(-1) : "nofile";
+    var lmatch = nnn.match(/\:\d*\)/);
+    var line = lmatch ? lmatch[0].shift(1).shift(-1) : "0";
+
+    yughlog(lvl, lg, file, line);
+  },
+  
+  info(msg) {
+    this.print(msg, 0);
+  },
+
+  warn(msg) {
+    this.print(msg, 1);
+  },
+
+  error(msg) {
+    this.print(msg, 2);
+  },
+  
+};
+

source/scripts/diff.js

@@ -0,0 +1,141 @@
+function deep_copy(from) {
+  if (typeof from !== 'object')
+    return from;
+
+  if (Array.isArray(from)) {
+    var c = [];
+    from.forEach(function(x,i) { c[i] = deep_copy(x); });
+    return c;
+  }
+    
+  var obj = {};
+  for (var key in from)
+    obj[key] = deep_copy(from[key]);
+
+  return obj;
+};
+
+
+var walk_up_get_prop = function(obj, prop, endobj) {
+  var props = [];
+  var cur = obj;
+  while (cur !== Object.prototype) {
+    if (cur.hasOwn(prop))
+      props.push(cur[prop]);
+
+    cur = cur.__proto__;
+  }
+
+  return props;
+};
+
+
+function complete_assign(target, source) {
+  var descriptors = {};
+  var assigns = {};
+  if (typeof source === 'undefined') return target;
+  Object.keys(source).forEach(function (k) {
+    var desc = Object.getOwnPropertyDescriptor(source, k);
+
+    if (desc.value) {
+      if (typeof desc.value === 'object' && desc.value.hasOwn('value'))
+        descriptors[k] = desc.value;
+      else
+        assigns[k] = desc.value;
+    } else
+      descriptors[k] = desc;
+  });
+
+  Object.defineProperties(target, descriptors);
+  Object.assign(target, assigns);
+  return target;
+};
+
+/* Assigns properties from source to target, only if they exist in target */
+function dainty_assign(target, source)
+{
+  for (var key in source) {
+    if (typeof source[key] === 'function') {
+      target[key] = source[key];
+      continue;
+    }
+    if (!(key in target)) continue;
+    if (Array.isArray(target[key]))
+      target[key] = source[key];
+    else if (typeof target[key] === 'object')
+      dainty_assign(target[key], source[key]);
+    else
+      target[key] = source[key];
+  }
+};
+
+/* Deeply remove source keys from target, not removing objects */
+function unmerge(target, source) {
+  for (var key in source) {
+    if (typeof source[key] === 'object' && !Array.isArray(source[key]))
+      unmerge(target[key], source[key]);
+    else
+      delete target[key];
+  }
+};
+
+/* Deeply merge two objects, not clobbering objects on target with objects on source */
+function deep_merge(target, source)
+{
+  for (var key in source) {
+    if (typeof source[key] === 'object' && !Array.isArray(source[key]))
+      deep_merge(target[key], source[key]);
+    else
+      target[key] = source[key];
+  }
+};
+
+
+function equal(x,y) {
+  if (typeof x === 'object')
+    for (var key in x)
+      return equal(x[key],y[key]);
+
+  return x === y;
+};
+
+function diffassign(target, from) {
+  if (from.empty) return;
+
+  for (var e in from) {
+    if (typeof from[e] === 'object') {
+      if (!target.hasOwnProperty(e))
+        target[e] = from[e];
+      else 
+        diffassign(target[e], from[e]);
+    } else {
+      if (from[e] === "DELETE") {
+        delete target[e];
+      } else {
+        target[e] = from[e];
+      }
+    }
+  }
+};
+
+function diff(from, to) {
+  var obj = {};
+
+  for (var e in to) {
+    if (typeof to[e] === 'object' && from.hasOwnProperty(e)) {
+      obj[e] = diff(from[e], to[e]);
+      if (obj[e].empty)
+        delete obj[e];
+    } else {
+      if (from[e] !== to[e])
+        obj[e] = to[e];
+    }
+  }
+
+  for (var e in from) {
+    if (!to.hasOwnProperty(e))
+      obj[e] = "DELETE";
+  }
+
+  return obj;
+};