git.plutz.net Git - flarejs/blob - engine.js

   1 var gamedata = {};
   2 var gfx = {};
   3
   4 function Textfile(txtfile) {
   5   var lines, fetch = new XMLHttpRequest();
   6   fetch.open("GET", txtfile, false);
   7   fetch.send();
   8
   9   var line, key, value, ref = this, section;
  10   for (line of fetch.responseText.split('\n')) switch(true) {
  11     case /^\[.*\]$/.test(line):
  12       section = line.split(/[\]\[]/)[1];
  13       if                     (!this[section]) this[section] = {};
  14       else if (!Array.isArray(this[section])) this[section] = [this[section],{}];
  15       else if ( Array.isArray(this[section])) this[section].push({});
  16       ref = this[section];
  17       break;
  18     case /^frame=[0-9]+,[0-7](,[0-9-]+){6}$/.test(line):
  19       key = line.split(/[=,]/).slice(1,3);  value = line.split(/,/).slice(-6);
  20       if (!ref.frame) ref.frame = [];
  21       if (!ref.frame[key[0]]) ref.frame[key[0]] = [];
  22       ref.frame[key[0]][key[1]] = value;
  23       break;
  24     case /^layer=[0-9]+,/.test(line):
  25       key = line.split(/[=,]/)[1];  value = line.split(/,/).slice(1);
  26       if (!ref.layer) ref.layer = [];
  27       ref.layer[key] = value;
  28       break;
  29     case /^duration=[0-9]+ms$/.test(line):
  30       ref["duration"] = parseInt(line.split(/=|ms$/)[1]);
  31       break;
  32     case /^duration=[0-9]+s$/.test(line):
  33       ref["duration"] = parseInt(line.split(/=|s$/)[1]) * 1000;
  34       break;
  35     case /^[^#].*=.+$/.test(line):
  36       key = line.split(/[=]/)[0];  value = line.split(/=/).slice(1).join("=");
  37       if                     (!ref[key]) ref[key] = value;
  38       else if (!Array.isArray(ref[key])) ref[key] = [ref[key],value];
  39       else if ( Array.isArray(ref[key])) ref[key].push(value);
  40       break;
  41   }
  42 }
  43
  44 function Mob(textdef) {
  45   if (! gamedata[textdef]) gamedata[textdef] = new Textfile(textdef);
  46   this.info = gamedata[textdef];
  47   this.direction = 0;
  48   this.position = [0, 0];
  49   this.animation = "stance";
  50   this.previous_animation = "";
  51   this.frametime = performance.now();
  52   if (! gfx[this.info.image]) {
  53     gfx[this.info.image] = document.createElement("img");
  54     gfx[this.info.image].setAttribute("src", this.info.image);
  55   }
  56
  57   this.place = function(x, y) { this.position = [x, y]; return this; }
  58   this.direct = function(d) { this.direction = d % 8; return this; }
  59   this.animate = function(a) {
  60     this.previous_animation = this.animation;
  61     this.animation = a;
  62     this.frametime = performance.now();
  63     return this;
  64   }
  65
  66   this.draw = function(){
  67     var f, a = this.info[this.animation];
  68     var frame = ( performance.now() - this.frametime ) * a.frames / a.duration | 0;
  69
  70     switch(a.type){
  71       case "looped":
  72         frame = frame % a.frames;
  73         break;
  74       case "play_once":
  75         if ( frame >= a.frames ){
  76           this.animation = this.previous_animation;
  77           this.previous_animation = "";
  78           this.frametime = performance.now();
  79           a = this.info[this.animation];
  80           frame = 0;
  81         }
  82         break;
  83       case "back_forth":
  84         frame = frame % (a.frames * 2 - 2);
  85         if ( frame >= a.frames ){
  86          frame = a.frames - frame % a.frames - 1;
  87         }
  88         break;
  89       default: break;
  90     }
  91     f = a.frame[frame][this.direction];
  92
  93     canvas.drawImage(gfx[this.info.image], f[0], f[1], f[2], f[3],
  94                      this.position[0] - f[4], this.position[1] - f[5],
  95                      f[2], f[3]);
  96   }
  97
  98   this.block  = function() { this.animate("block" ); return this; };
  99   this.cast   = function() { this.animate("cast"  ); return this; };
 100   this.die    = function() { this.animate("die"   ); return this; };
 101   this.hit    = function() { this.animate("hit"   ); return this; };
 102   this.run    = function() { this.animate("run"   ); return this; };
 103   this.shoot  = function() { this.animate("shoot" ); return this; };
 104   this.stance = function() { this.animate("stance"); return this; };
 105   this.swing  = function() { this.animate("swing" ); return this; };
 106 }
 107
 108 function Hero(gender = "female", hair = "short"){
 109   this.position = [0,0]; this.direction = 0;
 110   this.hair = (gender == "female")?"long":hair;
 111   this.animation = "stance";
 112
 113   if (! gamedata["/engine/hero_layers.txt"])
 114     gamedata["/engine/hero_layers.txt"] = new Textfile("/engine/hero_layers.txt");
 115   this.limbs = {
 116     head:  new Mob("/animations/avatar/"+gender+"/head_"+this.hair+".txt"),
 117     chest: new Mob("/animations/avatar/"+gender+"/default_chest.txt"),
 118     hands: new Mob("/animations/avatar/"+gender+"/default_hands.txt"),
 119     legs : new Mob("/animations/avatar/"+gender+"/default_legs.txt"),
 120     feet : new Mob("/animations/avatar/"+gender+"/default_feet.txt"),
 121     main : new Mob("/animations/avatar/"+gender+"/dagger.txt"),
 122     off  : new Mob("/animations/avatar/"+gender+"/shield.txt")
 123   }
 124
 125   this.dress = function(limb, item) {
 126     this.limbs[limb] = new Mob("/animations/avatar/"+gender+"/"+item+".txt")
 127     this.limbs[limb].place(this.position[0], this.position[1]).direct(this.direction);
 128     this.animate(this.animation);
 129     return this;
 130   }
 131
 132   this.place   = function(x,y) {
 133     this.position = [x,y];
 134     for (var limb in this.limbs) this.limbs[limb].place(x,y);
 135     return this;
 136   }
 137   this.direct  = function(d)   {
 138     this.direction = d;
 139     for (var limb in this.limbs) this.limbs[limb].direct(d);
 140     return this;
 141   }
 142   this.animate = function(anim){
 143     this.animation = anim;
 144     for (var limb in this.limbs) this.limbs[limb].animate(anim);
 145     return this;
 146   }
 147   this.draw    = function(){
 148     gamedata["/engine/hero_layers.txt"].layer[this.direction].forEach(limb => this.limbs[limb].draw());
 149     return this;
 150   }
 151
 152   this.block  = function() { this.animate("block" ); return this; };
 153   this.cast   = function() { this.animate("cast"  ); return this; };
 154   this.die    = function() { this.animate("die"   ); return this; };
 155   this.hit    = function() { this.animate("hit"   ); return this; };
 156   this.run    = function() { this.animate("run"   ); return this; };
 157   this.shoot  = function() { this.animate("shoot" ); return this; };
 158   this.stance = function() { this.animate("stance"); return this; };
 159   this.swing  = function() { this.animate("swing" ); return this; };
 160 }
 161
 162 canvas = document.getElementById("view").getContext("2d");
 163 player = new Hero().place(240, 160).direct(5);
 164
 165 setInterval( function() { canvas.clearRect(0,0, 480, 320); player.draw(); }, 33.33);