+var gamedata = {
+ // associative array for gamedata files
+ load: def => this[def] ? this[def] : this[def] = new Textfile(def)
+}
+var gfx = {
+ // associative array for game graphics
+ load: function(def) {
+ if (!this[def]) {
+ this[def] = document.createElement("img");
+ this[def].setAttribute("src", def);
+ }
+ return this[def];
+ }
+};
+
+function Textfile(txtfile) {
+ // fetch and parse gamedata file into structured object
+ 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) {
+ // section headers that always become array elements
+ case /^\[(npc|event|layer|dialog)\]$/.test(line):
+ section = line.split(/[\]\[]/)[1]; ref = {};
+ if (!this[section]) this[section] = [ref];
+ else if ( Array.isArray(this[section])) this[section].push(ref);
+ break;
+ // general section headers (may or may not be unique)
+ 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;
+ // frame definition from animation files
+ // frame=#frame,direction,srcX,srcY,width,height,dstX,dstY
+ case /^frame=[0-9]+,[0-7](,[0-9-]+){6}$/.test(line):
+ key = line.split(/[=,]/).slice(1,3); value = line.split(/,/).slice(-6);
+ if (!ref.frame) ref.frame = [];
+ if (!ref.frame[key[0]]) ref.frame[key[0]] = [];
+ ref.frame[key[0]][key[1]] = value.map(x => parseInt(x));
+ break;
+ // order of gfx draw from engine/hero_layers.txt
+ // layer=direction,list,of,limbs,...
+ case /^layer=[0-9]+,/.test(line):
+ key = line.split(/[=,]/)[1]; value = line.split(/,/).slice(1);
+ if (!ref.layer) ref.layer = []; ref.layer[key] = value;
+ break;
+ // empty data= line starting map data in map files
+ case /^data=$/.test(line):
+ ref.data = [];
+ break;
+ // map data array
+ case /^[0-9,]+,$/.test(line):
+ value = line.split(/,/).slice(0,-1);
+ ref.data = ref.data.concat(value);
+ break;
+ // map data array (last line)
+ case /^[0-9,]+$/.test(line):
+ value = line.split(/,/);
+ ref.data = ref.data.concat(value);
+ ref.data = ref.data.map(x => parseInt(x));
+ break;
+ // tile description from tiledef file
+ // tile=#tile,srcX,srcY,width,height,dstX,dstY
+ 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;
+ // animated tile from tiledef file
+ // animation=#tile;(srcX,srcY,duration;)...
+ case /^animation=[0-9]+;.*;$/.test(line):
+ key = line.split(/[=;]/)[1]; value = line.split(/;/).slice(1,-1);
+ value = value.map(x => x.split(/,/));
+ value.forEach(x => x[2] = parseInt(x[2]));
+ if (!ref.animation) ref.animation = []; ref.animation[key] = value;
+ break;
+ // frame duration from animation file (im millisec)
+ case /^duration=[0-9]+ms$/.test(line):
+ ref["duration"] = line.split(/=|ms$/)[1];
+ break;
+ // frame duration from animation file (in whole seconds)
+ case /^duration=[0-9]+s$/.test(line):
+ ref["duration"] = line.split(/=|s$/)[1] * 1000;
+ break;
+ // general numeric value (key=#)
+ case /^[^#].*=[0-9]+$/.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;
+ // general key=value (non-numeric or non-scalar)
+ 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) {
+ // object for map operations (drawing coorinate transformation, etc.)
+ this.info = gamedata.load(textdef);
+ const tileset = gamedata.load(this.info.header.tileset);
+ const frametime = performance.now();
+ gfx.load(tileset.img);
+
+ const h = this.info.header.height, w = this.info.header.width;
+ const 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+")";
+
+ // precalculated tile positions
+ // assign x/y coordinates to each tile index
+ // looks dumb but is faster than on the fly isometric calculations
+ const dx = [], dy = [];
+ for ( let y = 0; y < h; y++ ) for ( let x = 0; x < w; x++ ) {
+ dx[y * w + x] = (w + x - y) * tw / 2;
+ dy[y * w + x] = (x + y) * th / 2;
+ }
+
+ // tile index for pixel position on map
+ this.tileAt = function(x, y) {
+ var r = (y + th / 2) / th; var c = (x - w * tw /2) / tw;
+ var nx = r + c |0; var ny = r - c |0;
+ return ny * w + nx;
+ }
+
+ // center map to pixel position (by setting drawing offsets)
+ this.center = function(x, y) {
+ posx = canvas.canvas.width / 2 - x;
+ posy = canvas.canvas.height / 2 - y;
+ return this;
+ }
+
+ // draw the entire map, including all mobs
+ // mobs in an array of all heros, enemies, loot, npcs, etc.
+ this.draw = function(mobs) {
+ const bg = this.info.layer.find(l => l.type == "background").data;
+ const ob = this.info.layer.find(l => l.type == "object").data;
+ var i, mm = [];
+
+ // mobs only have x/y pixel positions,
+ // to draw them in order with map tiles we set up
+ // an array with current tile positions of mobs
+ mobs.forEach(m => {
+ let 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);
+
+ // draw background layer first
+ for ( i = 0; i < h * w; i++ ) draw_tile(bg[i], posx + dx[i], posy + dy[i]);
+
+ // draw object layer and mobs
+ for ( i = 0; i < h * w; i++ ) {
+ draw_tile(ob[i], posx + dx[i], posy + dy[i]);
+ if (mm[i]) mm[i].forEach(m => m.draw(posx + m.position[0], posy + m.position[1]));
+ }
+ }
+
+ // draw a single map tile at screen position x/y
+ // tile may be animated, if so defined in tiledef
+ function draw_tile(tile, x, y) {
+ const t = tileset.tile[tile];
+ const f = tileset.animation[tile];
+ x = x |0; y = y |0;
+
+ if (t && f) {
+ frame = ((performance.now() - frametime) / f[0][2] |0) % f.length;
+ canvas.drawImage(gfx[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[tileset.img], t[0], t[1], t[2], t[3],
+ x - t[4], y - t[5], t[2], t[3]);
+ }
+ }
+}
+
function Mob(textdef) {
- this.direction = 0;
+ // any mobile object, mostly for gfx representation
+ // may be hero, enemy, loot, npc, etc.
this.position = [0, 0];
- this.info = gamedata[textdef];
- this.animation = "stance";
- this.previous_animation = "";
- this.frametime = performance.now();
- this.image = document.querySelector("img[src='"+ this.info.image +"']");
-
- this.place = function(x, y) { this.position = [x, y]; }
- this.direct = function(d) { this.direction = d % 8; }
+ const info = gamedata.load(textdef);
+ var direction = 0;
+ var animation = "stance";
+ var previous_animation = "";
+ var frametime = performance.now();
+ gfx.load(info.image)
+
+ // place mob on x/y pixel coordinates
+ // e.g. when spawning, walking, etc.
+ this.place = function(x, y) {
+ this.position[0] = x, this.position[1] = y;
+ return this;
+ }
+
+ // change facing direction of mob
+ this.direct = function(d) { direction = d % 8; return this; }
+
+ // set animation cycle for drawing
+ // play_once animations will automatically fall back
+ // to previous loop after completion
this.animate = function(a) {
- this.previous_animation = this.animation;
- this.animation = a;
- this.frametime = performance.now();
+ if ( a != animation ) {
+ previous_animation = animation;
+ animation = a;
+ frametime = performance.now();
+ }
+ return this;
}
- this.draw = function(){
- var f, a = this.info[this.animation];
- var frame = ( performance.now() - this.frametime ) * a.frames.length / a.duration | 0;
+ // draw this mob to screen position x/y
+ this.draw = function(x, y){
+ var f, a = info[animation];
+ var f, frame = ( performance.now() - frametime ) * a.frames / a.duration | 0;
+ // determine current animation frame
switch(a.type){
case "looped":
- frame = frame % a.frames.length;
+ frame = frame % a.frames;
break;
case "play_once":
- if ( frame >= a.frames.length ){
- this.animation = this.previous_animation;
- this.previous_animation = "";
- this.frametime = performance.now();
- a = this.info[this.animation];
+ if ( frame >= a.frames ){
+ animation = previous_animation;
+ previous_animation = "";
+ frametime = performance.now();
+ a = info[animation];
frame = 0;
}
break;
case "back_forth":
- frame = frame % (a.frames.length * 2 - 2);
- if ( frame >= a.frames.length ){
- frame = a.frames.length - frame % a.frames.length - 1;
+ frame = frame % (a.frames * 2 - 2);
+ if ( frame >= a.frames ){
+ frame = a.frames - frame % a.frames - 1;
}
break;
default: break;
}
- f = a.frames[frame][this.direction];
+ f = a.frame[frame][direction];
- canvas.clearRect(0,0, 640, 480);
- canvas.drawImage(this.image, f[0], f[1], f[2], f[3],
- this.position[0] - f[4], this.position[1] - f[5],
+ canvas.drawImage(gfx[info.image], f[0], f[1], f[2], f[3],
+ x - f[4], y - f[5],
f[2], f[3]);
+ }
+
+ // shortcut functions for specific animations
+ this.block = () => this.animate("block" );
+ this.cast = () => this.animate("cast" );
+ this.die = () => this.animate("die" );
+ this.hit = () => this.animate("hit" );
+ this.run = () => this.animate("run" );
+ this.shoot = () => this.animate("shoot" );
+ this.stance = () => this.animate("stance");
+ this.swing = () => this.animate("swing" );
+}
+
+function Hero(gender = "female", hair = "short"){
+ // Object for player character
+ // unique in single player
+ this.position = [0,0];
+ this.stats = gamedata.load("/engine/stats.txt");
+ const layers = gamedata.load("/engine/hero_layers.txt");
+ var direction = 0, animation = "stance";
+ hair = (gender == "female")?"long":hair;
+
+ // hero consists of multiple mobs, one for each clothing/item overlay
+ var limbs = {
+ head : new Mob("/animations/avatar/"+gender+"/head_"+hair+".txt"),
+ chest: new Mob("/animations/avatar/"+gender+"/cloth_shirt.txt"),
+ hands: new Mob("/animations/avatar/"+gender+"/default_hands.txt"),
+ legs : new Mob("/animations/avatar/"+gender+"/cloth_pants.txt"),
+ feet : new Mob("/animations/avatar/"+gender+"/default_feet.txt"),
+ main : null, // main hand, e.g. melee weapon, magic weapon
+ off : null // off hand, e.g. shield, ranged weapon
+ }
+
+ // "dress" the player, i.e. assign clothing/item to limb
+ this.dress = function(limb, item) {
+ limbs[limb] = new Mob("/animations/avatar/"+gender+"/"+item+".txt")
+ limbs[limb].place(this.position[0], this.position[1]).direct(direction);
+ this.animate(animation);
+ return this;
+ }
+
+ // // Wrapper functions for Mob class // //
+
+ // place all mobs beloning to hero (when spawning, walking, teleporting, etc.)
+ this.place = function(x,y) {
+ this.position[0] = x, this.position[1] = y;
+ for (var limb in limbs) limbs[limb] && limbs[limb].place(x,y);
+ return this;
+ }
+ // change facing direction of hero (i.e. of all mobs)
+ this.direct = function(d) {
+ direction = d;
+ for (var limb in limbs) limbs[limb] && limbs[limb].direct(d);
+ return this;
+ }
+ // start animation cycle
+ this.animate = function(anim){
+ animation = anim;
+ for (var limb in limbs) limbs[limb] && limbs[limb].animate(anim);
+ return this;
+ }
+ this.draw = function(x, y){
+ layers.layer[direction].forEach(limb => limbs[limb] && limbs[limb].draw(x, y));
+ return this;
+ }
+
+ // shortcuts for animation
+ this.block = () => this.animate("block" );
+ this.cast = () => this.animate("cast" );
+ this.die = () => this.animate("die" );
+ this.hit = () => this.animate("hit" );
+ this.run = () => this.animate("run" );
+ this.shoot = () => this.animate("shoot" );
+ this.stance = () => this.animate("stance");
+ this.swing = () => this.animate("swing" );
+}
+
+function Controls(hero, map){
+ // processes keyboard / touch / mouse
+ // causes according player actions
+ // single player only, conrol will be assigned to server in multi player
+ var kbdmap = {
+ up: 87, altup: 38,
+ down: 83, altdown: 40,
+ left: 65, altleft: 37,
+ right: 68, altright: 39,
+ }
+ var keys = [];
+ var col = map.info.layer.find(l => l.type == "collision").data;
+
+ window.addEventListener("keydown", e => keys[e.keyCode] = true );
+ window.addEventListener("keyup" , e => keys[e.keyCode] = false);
+ setInterval(() => input(), 33.33)
+
+ // cause player to walk, processes blocked terrain and player speed
+ // x/y are factors of speed and direction
+ // i.e. +/-1 for diagonal movement
+ // and +/-1.4 for horizontal/vertical movement
+ function translate(x, y){
+ var sx = map.info.header.tilewidth * hero.stats.speed / 33.33;
+ var sy = map.info.header.tileheight * hero.stats.speed / 33.33;
+ var dx = x * sx, hx = hero.position[0];
+ var dy = y * sy, hy = hero.position[1];
+ var f = 2.1;
+
+ if (col[map.tileAt(hx + dx, hy + dy)] == 0 )
+ hero.place(hx + dx, hy + dy);
+ else if ( dy == 0 && col[map.tileAt(hx + dx / f, hy + sy / 1.5)] == 0 )
+ hero.place(hx + dx / f, hy + sy / 1.5);
+ else if ( dy == 0 && col[map.tileAt(hx + dx / f, hy - sy / 1.5)] == 0 )
+ hero.place(hx + dx / f, hy - sy / 1.5);
+ else if ( dx == 0 && col[map.tileAt(hx + sx / 1.5, hy + dy / f)] == 0 )
+ hero.place(hx + sx / 1.5, hy + dy / f);
+ else if ( dx == 0 && col[map.tileAt(hx - sx / 1.5, hy + dy / f)] == 0 )
+ hero.place(hx - sx / 1.5, hy + dy / f);
+ else player.stance();
- // var fetch = new XMLHttpRequest();
- // fetch.open("GET", textdef, false); fetch.send();
- // this.description = fetch.responseText.split('\n');
+ map.center(hero.position[0], hero.position[1]);
+ }
+
+ // process input and decide on according action
+ function input(){
+ // facing directions, indexed by OR of key press combinations
+ const dir = [ -1, 0, 4, -1, 2, 1, 3, 2, 6, 7, 5, 6, -1, 0, 4, -1 ];
+ // translation speed and direction, indexed by facing direction of movement
+ const trans = [ [-1.4,0], [-1,-1], [0,-1.4], [1,-1], [1.4,0], [1,1], [0,1.4], [-1,1] ];
+ var k = 0;
+
+ // OR of direction key presses
+ k += (keys[kbdmap.left] || keys[kbdmap.altleft]) ? 1 : 0;
+ k += (keys[kbdmap.right] || keys[kbdmap.altright]) ? 2 : 0;
+ k += (keys[kbdmap.up] || keys[kbdmap.altup]) ? 4 : 0;
+ k += (keys[kbdmap.down] || keys[kbdmap.altdown]) ? 8 : 0;
+
+ if (~dir[k]) {
+ hero.direct(dir[k]).run();
+ translate(trans[dir[k]][0], trans[dir[k]][1]);
+ } else hero.stance();
}
}
-canvas = document.getElementById("view").getContext("2d");
-player = new Mob("/animations/avatar/male/clothes.txt");
-player.place(320, 240);
+document.querySelector("body").setAttribute("style", "margin: 0; padding: 0;");
+canvas = document.createElement("canvas").getContext("2d");
+canvas.canvas.setAttribute("style", "display: block; border: 0; margin: 0; padding: 0;");
+document.querySelector("body").appendChild(canvas.canvas);
+
+canvas.canvas.width = window.innerWidth;
+canvas.canvas.height = window.innerHeight;
+window.addEventListener("resize", function(){
+ canvas.canvas.width = window.innerWidth;
+ canvas.canvas.height = window.innerHeight;
+});
+
+// player = new Mob("animations/enemies/zombie.txt"); player.stats = { speed: 3 };
+player = new Hero();
+map = new Map("/maps/arrival.txt");
+player.place(map.info.header.hero_pos.split(/,/)[0] * map.info.header.tilewidth,
+ map.info.header.hero_pos.split(/,/)[1] * map.info.header.tileheight);
+player.direct(5).stance();
+
+map.center(player.position[0], player.position[1]);
+c = new Controls(player, map);
-setInterval( function() { player.draw(); }, 33);
+setInterval (() => map.draw([player]), 33.33 );