prosperon/scripts/engine.js

var files = {};
function load(file) {
   var modtime = cmd(0, file);
  files[file] = modtime;
}

load("scripts/base.js");
load("scripts/std.js");

function run(file)
{
  var modtime = cmd(119, file);
  if (modtime === 0) {
    Log.stack();
    return false;
  }

  files[file] = modtime;
  return cmd(117, file);
}

function run_env(file, env)
{
  var script = IO.slurp(file);
  return function(){return eval(script);}.call(env);
}

load("scripts/diff.js");
Log.level = 1;

var Color = {
  white: [255,255,255],
  black: [0,0,0],
  blue: [84,110,255],
  green: [120,255,10],
  yellow: [251,255,43],
  red: [255,36,20],
  teal: [96, 252, 237],
  gray: [181,181,181],
  cyan: [0,255,255],
  purple: [162,93,227],
};

Color.editor = {};
Color.editor.ur = Color.green;

Color.tohtml = function(v)
{
  var html = v.map(function(n) { return Number.hex(n*255); });
  return "#" + html.join('');
}

Color.toesc = function(v)
{
  return Esc.color(v);
}

var Esc = {};
Esc.reset = "\x1b[0";
Esc.color = function(v) {
  var c = v.map(function(n) { return Math.floor(n*255); });
  var truecolor = "\x1b[38;2;" + c.join(';') + ';';
  return truecolor;
}

Color.Arkanoid = {
  orange: [255,143,0],
  teal: [0,255,255],
  green: [0,255,0],
  red: [255,0,0],
  blue: [0,112,255],
  purple: [255,0,255],
  yellow: [255,255,0],
  silver: [157,157,157],
  gold: [188,174,0],
};

Color.Arkanoid.Powerups = {
  red: [174,0,0], /* laser */
  blue: [0,0,174], /* enlarge */
  green: [0,174,0], /* catch */
  orange: [224,143,0], /* slow */
  purple: [210,0,210], /* break */
  cyan: [0,174,255], /* disruption */
  gray: [143,143,143] /* 1up */
};

Color.Gameboy = {
  darkest: [229,107,26],
  dark: [229,189,26],
  light: [189,229,26],
  lightest: [107,229,26],
};

Color.Apple = {
  green: [94,189,62],
  yellow: [255,185,0],
  orange: [247,130,0],
  red: [226,56,56],
  purple: [151,57,153],
  blue: [0,156,223]
};

Color.Debug = {
  boundingbox: Color.white,
  names: [84,110,255],
};

Color.Editor = {
  grid: [99,255,128],
  select: [255,255,55],
  newgroup: [120,255,10],
};

/* Detects the format of all colors and munges them into a floating point format */
Color.normalize = function(c) {
  var add_a = function(a) {
    var n = this.slice();
    n.a = a;
    return n;
  };
  
  for (var p of Object.keys(c)) {
    var fmt = "nrm";
    if (typeof c[p] !== 'object') continue;
    if (!Array.isArray(c[p])) {
      Color.normalize(c[p]);
      continue;
    }
    
    for (var color of c[p]) {
      if (color > 1) {
        fmt = "8b";
	break;
      }
    }

    switch(fmt) {
      case "8b":
        c[p] = c[p].map(function(x) { return x/255; });
    }
    c[p].alpha = add_a;
  }
};

Color.normalize(Color);

Object.deepfreeze(Color);

var ColorMap = {};
ColorMap.makemap = function(map)
{
  var newmap = Object.create(ColorMap);
  Object.assign(newmap, map);
  return newmap;
}
ColorMap.Jet = ColorMap.makemap({
  0: [0,0,131],
  0.125: [0,60,170],
  0.375: [5,255,255],
  0.625: [255,255,0],
  0.875: [250,0,0],
  1: [128,0,0]
});

ColorMap.BlueRed = ColorMap.makemap({
  0: [0,0,255],
  1: [255,0,0]
});

ColorMap.Inferno = ColorMap.makemap({
  0:[0,0,4],
  0.13: [31,12,72],
  0.25: [85,15,109],
  0.38: [136,34,106],
  0.5: [186,54,85],
  0.63: [227,89,51],
  0.75: [249,140,10],
  0.88: [249,201,50],
  1: [252,255,164]
});

ColorMap.Bathymetry = ColorMap.makemap({
  0: [40,26,44],
  0.13: [59.49,90],
  0.25: [64,76,139],
  0.38: [63,110,151],
  0.5: [72,142,158],
  0.63: [85,174,163],
  0.75: [120,206,163],
  0.88: [187,230,172],
  1: [253,254,204]
});

ColorMap.Viridis = ColorMap.makemap({
  0: [68,1,84],
  0.13: [71,44,122],
  0.25: [59,81,139],
  0.38: [44,113,142],
  0.5: [33,144,141],
  0.63: [39,173,129],
  0.75: [92,200,99],
  0.88: [170,220,50],
  1: [253,231,37]
});

Color.normalize(ColorMap);

ColorMap.sample = function(t, map)
{
  map ??= this;
  if (t < 0) return map[0];
  if (t > 1) return map[1];

  var lastkey = 0;
  for (var key of Object.keys(map).sort()) {
    if (t < key) {
      var b = map[key];
      var a = map[lastkey];
      var tt = (key - lastkey) * t;
      return a.lerp(b, tt);
    }
    lastkey = key;
  }
  return map[1];
}

ColorMap.doc = {
  sample: "Sample a given colormap at the given percentage (0 to 1).",
};

Object.freeze(ColorMap);

function bb2wh(bb) {
  return [bb.r-bb.l, bb.t-bb.b];
};

load("scripts/gui.js");

var timer = {
  make(fn, secs,obj,loop,app) {
    app ??= false;
    if (secs === 0) {
      fn.call(obj);
      return;
    }
      
    var t = Object.create(this);

    t.callback = fn;
    var guardfn = function() {
      if (typeof t.callback === 'function') {
        t.callback();
	if (!t.loop) t.kill();
      }
      else
        Log.warn("Timer trying to execute without a function.");
    };
    t.id = make_timer(guardfn, secs, app);
    t.loop = loop;
    t.pause();
    
    return t;
  },

  oneshot(fn, secs,obj, app) {
    app ??= false;
    var t = this.make(fn, secs, obj, 0, app);
    t.start();
  },
  get remain() { return cmd(32, this.id); },
  get on() { return cmd(33, this.id); },
  get loop() { return cmd(34, this.id); },
  set loop(x) { cmd(35, this.id, x); },
  
  start() { cmd(26, this.id); },
  stop() { cmd(25, this.id); },
  pause() { cmd(24, this.id); },
  kill() { cmd(27, this.id); },
  set time(x) { cmd(28, this.id, x); },
  get time() { return cmd(29, this.id); },
  get pct() { return this.remain / this.time; },
};
timer.toJSON = function() { return undefined; };
timer.doc = {
  doc: "Quickly make timers to fire off events once or multiple times.",
  oneshot: "Executes a given function after the given number of seconds.",
  make: "Returns a timer that can be handled and reused.",
  start: "Starts the timer.",
  stop: "Stops the timer.",
  loop: "Set to true for the timer to repeat when done.",
  kill: "Destroys the timer.",
  pct: "Get the percentange the timer is complete.",
  time: "Set or get the amount of time this timer waits to execute. Does not reset the time, so if it is set to below the elapsed time it will execute immediately.",
  remain: "The time remianing before the function is executed.",
};

var animation = {
  time: 0,
  loop: false,
  playtime: 0,
  playing: false,
  keyframes: [],

  create() {
    var anim = Object.create(animation);
    Register.update.register(anim.update, anim);
    return anim;
  },

  start() {
    this.playing = true;
    this.time = this.keyframes.last[1];
    this.playtime = 0;
  },

  interval(a, b, t) {
    return (t - a) / (b - a);
  },

  near_val(t) {
    for (var i = 0; i < this.keyframes.length-1; i++) {
      if (t > this.keyframes[i+1][1]) continue;

      return this.interval(this.keyframes[i][1], this.keyframes[i+1][1], t) >= 0.5 ? this.keyframes[i+1][0] : this.keyframes[i][0];
    }

    return this.keyframes.last[0];
  },

  lerp_val(t) {
    for (var i = 0; i < this.keyframes.length-1; i++) {
      if (t > this.keyframes[i+1][1]) continue;

      var intv = this.interval(this.keyframes[i][1], this.keyframes[i+1][1], t);
      return ((1 - intv) * this.keyframes[i][0]) + (intv * this.keyframes[i+1][0]);
    }

    return this.keyframes.last[0];
  },

  cubic_val(t) {

  },

  mirror() {
    if (this.keyframes.length <= 1) return;
    for (var i = this.keyframes.length-1; i >= 1; i--) {
      this.keyframes.push(this.keyframes[i-1]);
      this.keyframes.last[1] = this.keyframes[i][1] + (this.keyframes[i][1] - this.keyframes[i-1][1]);
    }
  },

  update(dt) {
    if (!this.playing) return;

    this.playtime += dt;
    if (this.playtime >= this.time) {
      if (this.loop)
        this.playtime = 0;
      else {
        this.playing = false;
        return;
      }
    }

    this.fn(this.lerp_val(this.playtime));
  },
};

var Render = {
  normal() {
    cmd(67);
  },
  
  wireframe() {
    cmd(68);
  },
};

Render.doc = {
  doc: "Functions for rendering modes.",
  normal: "Final render with all lighting.",
  wireframe: "Show only wireframes of models."
};

load("scripts/physics.js");
load("scripts/input.js");
load("scripts/sound.js");

function screen2world(screenpos) {
  if (Game.camera)
    return Game.camera.view2world(screenpos);
  return screenpos;
}
function world2screen(worldpos) { return Game.camera.world2view(worldpos); }

var Register = {
  inloop: false,
  loopcbs: [],
  finloop() {
    this.loopcbs.forEach(x => x());
    this.loopcbs = [];
  },

  wraploop(loop) {
    this.inloop = true;
    loop();
    this.inloop = false;
    this.finloop();
  },

  kbm_input(mode, btn, state, ...args) {
    if (state === 'released') {
      btn = btn.split('-').last;
    }
   
    switch(mode) {
      case "emacs":
        Player.players[0].raw_input(btn, state, ...args);
        break;

      case "mouse":
        Player.players[0].mouse_input(btn, state, ...args);
	break;

      case "char":
        Player.players[0].char_input(btn);
	break;
    };
  },

  gamepad_playermap: [],
  gamepad_input(pad, btn, state, ...args) {
    var player = this.gamepad_playermap[pad];
    if (!player) return;

    var statestr = Input.state2str(state);

    var rawfn = `gamepad_${btn}_${statestr}`;
    player.input(rawfn, ...args);

    Action.actions.forEach(x => {
      if (x.inputs.includes(btn))
        player.input(`action_${x.name}_${statestr}`, ...args);
    });
  },
  
  unregister_obj(obj) {
    Register.registries.forEach(function(x) {
      x.unregister_obj(obj);
    });
    Player.uncontrol(obj);
  },

  endofloop(fn) {
    if (!this.inloop)
      fn();
    else {
      this.loopcbs.push(fn);
    }
  },

  clear() {
    Register.registries.forEach(function(n) {
      n.entries = [];
    });
  },

  registries: [],

  add_cb(idx, name) {
    var entries = [];
    var n = {};
    n.register = function(fn, obj) {
      if (!obj) {
        Log.error("Refusing to register a function without a destroying object.");
	return;
      }
      entries.push({
        fn: fn,
	obj: obj
      });
    }

    n.unregister = function(fn) {
      entries = entries.filter(function(e) { return e.fn !== fn; });
    }

    n.unregister_obj = function(obj) {
      entries = entries.filter(function(e) { return e.obj !== obj; });
    }

    n.broadcast = function(...args) {
      entries.forEach(x => x.fn.call(x.obj, ...args));
    }

    n.clear = function() {
      entries = [];
    }

    register(idx, n.broadcast, n);

    Register[name] = n;
    Register.registries.push(n);
    
    return n;
  },
};

Register.add_cb(0, "update").doc = "Called once per frame.";
Register.add_cb(1, "physupdate");
Register.add_cb(2, "gui");
Register.add_cb(6, "debug");
register(7, Register.kbm_input, Register);
Register.add_cb(8, "gamepad_input");
Register.add_cb(10, "draw");

register(9, Log.stack, this);

Register.gamepad_playermap[0] = Player.players[0];

var Signal = {
  signals: [],
  obj_begin(fn, obj, go) {
    this.signals.push([fn, obj]);
    register_collide(0, fn, obj, go.body);
  },

  obj_separate(fn, obj, go) {
    this.signals.push([fn,obj]);
    register_collide(3,fn,obj,go.body);
  },

  clear_obj(obj) {
    this.signals.filter(function(x) { return x[1] !== obj; });
  },

  c:{},
  register(name, fn) {
    if (!this.c[name])
      this.c[name] = [];

    this.c[name].push(fn);
  },

  call(name, ...args) {
    if (this.c[name])
      this.c[name].forEach(function(fn) { fn.call(this, ...args); });
  },
};

var game_quit = function()
{
  Primum.kill();
}

Signal.register("quit", game_quit);

var Window = {
  fullscreen(f) { cmd(145, f); },
  set width(w) { cmd(125, w); },
  set height(h) { cmd(126, h); },
  get width() { return cmd(48); },
  get height() { return cmd(49); },
  get dimensions() { return [this.width, this.height]; },
  set name(str) { cmd(134, str); },
  boundingbox() {
    return {
      t: Window.height,
      b: 0,
      r: Window.width,
      l: 0
    };
  },
};

Window.icon = function(path) { cmd(90, path); };
Window.icon.doc = "Set the icon of the window using the PNG image at path.";

function reloadfiles() {
  Object.keys(files).forEach(function (x) { load(x); });
}

load("scripts/debug.js");

/*
function Color(from) {
  var color = Object.create(Array);
  Object.defineProperty(color, 'r', setelem(0));
  Object.defineProperty(color, 'g', setelem(1));
  Object.defineProperty(color, 'b', setelem(2));
  Object.defineProperty(color, 'a', setelem(3));

  color.a = color.g = color.b = color.a = 1;
  Object.assign(color, from);

  return color;
};
*/

var Spline = {};
Spline.sample = function(degrees, dimensions, type, ctrl_points, nsamples)
{
  var s = spline_cmd(0, degrees,dimensions,type,ctrl_points,nsamples);
  return s;
}
Spline.type = {
  open: 0,
  clamped: 1,
  beziers: 2
};

load("scripts/components.js");

function find_com(objects)
{
  if (!objects || objects.length === 0)
    return [0,0];
    var com = [0,0];
    com[0] = objects.reduce(function(acc, val) {
      return acc + val.pos[0];
    }, 0);
    com[0] /= objects.length;
    
    com[1] = objects.reduce(function(acc, val) {
      return acc + val.pos[1];
    }, 0);
    com[1] /= objects.length;    
    
    return com;
};

var Game = {
  init() {
    if (!Game.edit) {
      load("config.js");
      load("game.js");
    }
    else {
      load("scripts/editor.js");
      load("editorconfig.js");
      editor.enter_editor();
    }
  },
  objects: [],
  resolution: [1200,720],
  name: "Untitled",
  edit: true,
  register_obj(obj) {
    this.objects[obj.body] = obj;
  },

  unregister_obj(obj) {
    if (this.objects[obj.body] === obj)
      this.objects[obj.body] = undefined;
  },

  obj_at(worldpos) {
    var idx = physics.pos_query(worldpos);
    if (idx === -1) return undefined;
    return Game.objects[idx];
  },
  
  /* Returns an object given an id */
  object(id) {
    return this.objects[id];
  },

  /* Returns a list of objects by name */
  find(name) {
    
  },

  /* Return a list of objects derived from a specific prototype */
  find_proto(proto) {

  },

  /* List of all objects spawned that have a specific tag */
  find_tag(tag) {

  },

  groupify(objects, spec) {
    var newgroup = {
      locked: true,
      breakable: true,
      objs: objects,
//      get pos() { return find_com(objects); },
//      set pos(x) { this.objs.forEach(function(obj) { obj.pos = x; }) },
    };

    Object.assign(newgroup, spec);
    objects.forEach(function(x) {
      x.defn('group', newgroup);
    });

    var bb = bb_from_objects(newgroup.objs);
    newgroup.startbb = bb2cwh(bb);
    newgroup.bboffset = newgroup.startbb.c.sub(newgroup.objs[0].pos);

    newgroup.boundingbox = function() {
      newgroup.startbb.c = newgroup.objs[0].pos.add(newgroup.bboffset);
      return cwh2bb(newgroup.startbb.c, newgroup.startbb.wh);
    };

    if (newgroup.file)
      newgroup.color = Color.Editor.newgroup;

    return newgroup;
  },

  quit()
  {
    sys_cmd(0);
  },

  pause()
  {
    sys_cmd(3);
  },

  stop()
  {
    Game.pause();
  },

  step()
  {
    sys_cmd(4);
  },

  editor_mode(m) { sys_cmd(10, m); },

  playing() { return sys_cmd(5); },
  paused() { return sys_cmd(6); },
  stepping() {
  return cmd(79); },

  play()
  {
    sys_cmd(1);
  },

  get dt() {
    return cmd(63);
  },

  wait_fns: [],

  wait_exec(fn) {
    if (!phys_stepping())
      fn();
    else
      this.wait_fns.push(fn);
  },

  exec() {
    this.wait_fns.forEach(function(x) { x(); });

    this.wait_fns = [];
  },
};

Game.doc = {};
Game.doc.object = "Returns the entity belonging to a given id.";
Game.doc.quit = "Immediately quit the game.";
Game.doc.pause = "Pause game simulation.";
Game.doc.stop = "Stop game simulation. This does the same thing as 'pause', and if the game is a debug build, starts its editor.";
Game.doc.play = "Resume or start game simulation.";
Game.doc.editor_mode = "Set to true for the game to only update on input; otherwise the game updates every frame.";
Game.doc.dt = "Current frame dt.";
Game.doc.view_camera = "Set the camera for the current view.";
Game.doc.camera = "Current camera.";

Window.doc = {};
Window.doc.width = "Width of the game window.";
Window.doc.height = "Height of the game window.";
Window.doc.dimensions = "Window width and height packaged in an array [width,height]";
Window.doc.name = "Name in the title bar of the window.";
Window.doc.boundingbox = "Boundingbox of the window, with top and right being its height and width.";

Register.update.register(Game.exec, Game);

load("scripts/entity.js");

function world_start() {
globalThis.preprimum = Object.create(gameobject);
var preprimum = globalThis.preprimum;
preprimum.objects = {};
preprimum.worldpos = function() { return [0,0]; };
preprimum.worldangle = function() { return 0; };
preprimum.scale = 1;
preprimum.gscale = function() { return 1; };
preprimum.pos = [0,0];
preprimum.angle = 0;
preprimum.remove_obj = function() {};
preprimum.toString = function() { return "preprimum"; };
globalThis.World = preprimum.make(preprimum);
globalThis.Primum = World;
var Primum = globalThis.Primum;
Primum.level = undefined;
Primum.toString = function() { return "Primum"; };
Primum._ed.selectable = false;
Primum._ed.check_dirty = function() { };
Primum._ed.dirty = false;
Primum.revert = function(){};
Primum.ur = undefined;
globalThis.World.reparent = function(parent) { Log.warn("Cannot reparent the Primum."); }
Game.view_camera(Primum.spawn(ur.camera2d));
}

/* Load configs */
function load_configs(file) {
  Log.info(`Loading config file ${file}.`);
  var configs = JSON.parse(IO.slurp(file));
  for (var key in configs) {
    if (typeof globalThis[key] !== "object") continue;
    Object.assign(globalThis[key], configs[key]);
  }
  
  Collision.sync();
  Game.objects.forEach(function(x) { x.sync(); });
  
  if (!local_conf.mouse) {
    Log.info("disabling mouse features");
    Mouse.disabled = function() {};
    Mouse.hidden = function() {};
  };
};

var local_conf = {
  mouse: true,
};

if (IO.exists("game.config"))
  load_configs("game.config");

/* Save configs */
function save_configs() {
    Log.info("saving configs");
    var configs = {};
    configs.editor_config = editor_config;
    configs.Nuke = Nuke;
    configs.local_conf = local_conf;
    IO.slurpwrite(JSON.stringify(configs, null, 1), "editor.config");
    
    save_game_configs();
};

function save_game_configs() {
  var configs = {};
  configs.physics = physics;
  configs.Collision = Collision;
  Log.info(configs);
  IO.slurpwrite(JSON.stringify(configs,null,1), "game.config");

  Collision.sync();
  Game.objects.forEach(function(x) { x.sync(); });
};

load("scripts/physics.js");

Game.view_camera = function(cam)
{
  Game.camera = cam;
  cmd(61, Game.camera.body);
  cam.zoom = cam.zoom;
}

Window.name = "Primum Machinam (V0.1)";
Window.width = 1280;
Window.height = 720;

var Asset = {};
Asset.doc = {
  doc: "Functions to manage the loading and unloading of assets, like sounds and images."
};