+var gamedata = {};
+var gfx = {};
+
+function Textfile(txtfile) {
+ var lines, fetch = new XMLHttpRequest();
+ fetch.open("GET", txtfile, false);
+ fetch.send();
+
+ var line, key, value, ref = this, section;
+ for (line of fetch.responseText.split('\n')) switch(true) {
+ case /^\[.*\]$/.test(line):
+ section = line.split(/[\]\[]/)[1]; ref = {};
+ if (!this[section]) this[section] = ref;
+ else if (!Array.isArray(this[section])) this[section] = [this[section],ref];
+ else if ( Array.isArray(this[section])) this[section].push(ref);
+ break;
+ case /^frame=[0-9]+,[0-7](,[0-9-]+){6}$/.test(line):
+ key = line.split(/[=,]/).slice(1,3); value = line.split(/,/).slice(-6);
+ if (!ref.frame) ref.frame = [];
+ if (!ref.frame[key[0]]) ref.frame[key[0]] = [];
+ ref.frame[key[0]][key[1]] = value.map(x => parseInt(x));
+ break;
+ case /^layer=[0-9]+,/.test(line):
+ key = line.split(/[=,]/)[1]; value = line.split(/,/).slice(1);
+ if (!ref.layer) ref.layer = []; ref.layer[key] = value;
+ break;
+ case /^data=$/.test(line):
+ ref.data = [];
+ break;
+ case /^[0-9,]+,$/.test(line):
+ value = line.split(/,/).slice(0,-1);
+ ref.data = ref.data.concat(value);
+ break;
+ case /^[0-9,]+$/.test(line):
+ value = line.split(/,/);
+ ref.data = ref.data.concat(value);
+ ref.data = ref.data.map(x => parseInt(x));
+ break;
+ case /^tile=[0-9]+,/.test(line):
+ key = line.split(/[=,]/)[1]; value = line.split(/,/).slice(1);
+ if (!ref.tile) ref.tile = []; ref.tile[key] = value.map(x => parseInt(x));
+ break;
+ case /^animation=[0-9]+;.*;$/.test(line):
+ key = line.split(/[=;]/)[1]; value = line.split(/;/).slice(1,-1);
+ value = value.map(x => x.split(/,/));
+ value.forEach(x => x[2] = parseInt(x[2]));
+ if (!ref.animation) ref.animation = []; ref.animation[key] = value;
+ break;
+ case /^duration=[0-9]+ms$/.test(line):
+ ref["duration"] = line.split(/=|ms$/)[1];
+ break;
+ case /^duration=[0-9]+s$/.test(line):
+ ref["duration"] = line.split(/=|s$/)[1] * 1000;
+ break;
+ case /^[^#].*=[0-9]+$/.test(line):
+ key = line.split(/[=]/)[0]; value = line.split(/=/).slice(1) * 1;
+ if (!ref[key]) ref[key] = value;
+ else if (!Array.isArray(ref[key])) ref[key] = [ref[key],value];
+ else if ( Array.isArray(ref[key])) ref[key].push(value);
+ break;
+ case /^[^#].*=.+$/.test(line):
+ key = line.split(/[=]/)[0]; value = line.split(/=/).slice(1).join("=");
+ if (!ref[key]) ref[key] = value;
+ else if (!Array.isArray(ref[key])) ref[key] = [ref[key],value];
+ else if ( Array.isArray(ref[key])) ref[key].push(value);
+ break;
+ }
+}
+
+function Map(textdef) {
+ this.frametime = performance.now();
+ if (gamedata[textdef]) this.info = gamedata[textdef];
+ else gamedata[textdef] = this.info = new Textfile(textdef);
+ if (gamedata[this.info.header.tileset]) this.tileset = gamedata[this.info.header.tileset];
+ else gamedata[this.info.header.tileset] = this.tileset = new Textfile(this.info.header.tileset);
+ if (! gfx[this.tileset.img]) {
+ gfx[this.tileset.img] = document.createElement("img");
+ gfx[this.tileset.img].setAttribute("src", this.tileset.img);
+ }
+
+ var h = this.info.header.height, w = this.info.header.width;
+ var th = this.info.header.tileheight, tw = this.info.header.tilewidth;
+ var posx = canvas.canvas.width / 2, posy = canvas.canvas.height / 2 - h * th/2;
+
+ canvas.fillStyle = "rgba("+this.info.header.background_color+")";
+
+ this.tileAt = function(x, y) {
+ nx = (y + th / 2) / th + (x - w * tw / 2) / tw |0;
+ ny = (y + th / 2) / th - (x - w * tw / 2) / tw |0;
+ return ny * w + nx;
+ }
+
+ this.center = function(x, y) {
+ posx = canvas.canvas.width / 2 - x;
+ posy = canvas.canvas.height / 2 - y;
+ return this;
+ }
+
+ this.draw = function(mobs) {
+ var x, y, dx, dy, i;
+ var bg = this.info.layer.find(l => l.type == "background").data;
+ var ob = this.info.layer.find(l => l.type == "object").data;
+ var mm = [];
+ mobs.forEach(m => {
+ i = this.tileAt(m.position[0], m.position[1]);
+ mm[i] = mobs.filter(m => i == this.tileAt(m.position[0], m.position[1]));
+ });
+ canvas.fillRect(0,0, canvas.canvas.width, canvas.canvas.height);
+
+ for ( y = 0; y < h; y++ ) for ( x = 0; x < w; x++ ) {
+ i = y * h + x;
+ dx = posx + (w + x - y) * tw /2;
+ dy = posy + (x + y) * th / 2;
+ this.draw_tile(bg[i], dx, dy);
+ this.draw_tile(ob[i], dx, dy);
+ if (mm[i]) mm[i].forEach(m => m.draw(dx, dy));
+ }
+ }
+
+ this.draw_tile = function(tile, x, y) {
+ var t = this.tileset.tile[tile];
+ var f = this.tileset.animation[tile];
+
+ if (t && f) {
+ frame = ((performance.now() - this.frametime) / f[0][2] |0) % f.length;
+ canvas.drawImage(gfx[this.tileset.img], f[frame][0], f[frame][1], t[2], t[3],
+ x - t[4], y - t[5], t[2], t[3]);
+ } else if (t) {
+ canvas.drawImage(gfx[this.tileset.img], t[0], t[1], t[2], t[3],
+ x - t[4], y - t[5], t[2], t[3]);
+ }
+ }
+}
+