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458 lines
13 KiB
JavaScript
458 lines
13 KiB
JavaScript
/*global Quintus:false */
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Quintus["2D"] = function(Q) {
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Q.component('viewport',{
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added: function() {
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this.entity.on('prerender',this,'prerender');
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this.entity.on('render',this,'postrender');
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this.x = 0;
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this.y = 0;
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this.offsetX = 0;
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this.offsetY = 0;
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this.centerX = Q.width/2;
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this.centerY = Q.height/2;
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this.scale = 1;
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},
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extend: {
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follow: function(sprite,directions,boundingBox) {
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this.off('poststep',this.viewport,'follow');
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this.viewport.directions = directions || { x: true, y: true };
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this.viewport.following = sprite;
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this.viewport.boundingBox = boundingBox;
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this.on('poststep',this.viewport,'follow');
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this.viewport.follow(true);
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},
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unfollow: function() {
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this.off('poststep',this.viewport,'follow');
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},
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centerOn: function(x,y) {
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this.viewport.centerOn(x,y);
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},
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moveTo: function(x,y) {
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return this.viewport.moveTo(x,y);
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}
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},
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follow: function(first) {
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var followX = Q._isFunction(this.directions.x) ? this.directions.x(this.following) : this.directions.x;
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var followY = Q._isFunction(this.directions.y) ? this.directions.y(this.following) : this.directions.y;
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this[first === true ? 'centerOn' : 'softCenterOn'](
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followX ?
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this.following.p.x + this.following.p.w/2 - this.offsetX :
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undefined,
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followY ?
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this.following.p.y + this.following.p.h/2 - this.offsetY :
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undefined
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);
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},
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offset: function(x,y) {
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this.offsetX = x;
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this.offsetY = y;
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},
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softCenterOn: function(x,y) {
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if(x !== void 0) {
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var dx = (x - Q.width / 2 / this.scale - this.x)/3;
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if(this.boundingBox) {
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if(this.x + dx < this.boundingBox.minX) {
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this.x = this.boundingBox.minX / this.scale;
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}
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else if(this.x + dx > (this.boundingBox.maxX - Q.width) / this.scale) {
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this.x = (this.boundingBox.maxX - Q.width) / this.scale;
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}
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else {
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this.x += dx;
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}
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}
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else {
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this.x += dx;
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}
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}
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if(y !== void 0) {
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var dy = (y - Q.height / 2 / this.scale - this.y)/3;
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if(this.boundingBox) {
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if(this.y + dy < this.boundingBox.minY) {
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this.y = this.boundingBox.minY / this.scale;
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}
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else if(this.y + dy > (this.boundingBox.maxY - Q.height) / this.scale) {
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this.y = (this.boundingBox.maxY - Q.height) / this.scale;
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}
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else {
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this.y += dy;
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}
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}
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else {
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this.y += dy;
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}
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}
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},
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centerOn: function(x,y) {
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if(x !== void 0) {
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this.x = x - Q.width / 2 / this.scale;
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}
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if(y !== void 0) {
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this.y = y - Q.height / 2 / this.scale;
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}
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},
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moveTo: function(x,y) {
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if(x !== void 0) {
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this.x = x;
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}
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if(y !== void 0) {
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this.y = y;
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}
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return this.entity;
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},
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prerender: function() {
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this.centerX = this.x + Q.width / 2 /this.scale;
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this.centerY = this.y + Q.height / 2 /this.scale;
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Q.ctx.save();
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Q.ctx.translate(Math.floor(Q.width/2),Math.floor(Q.height/2));
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Q.ctx.scale(this.scale,this.scale);
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Q.ctx.translate(-Math.floor(this.centerX), -Math.floor(this.centerY));
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},
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postrender: function() {
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Q.ctx.restore();
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}
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});
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Q.TileLayer = Q.Sprite.extend({
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init: function(props) {
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this._super(props,{
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tileW: 32,
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tileH: 32,
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blockTileW: 10,
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blockTileH: 10,
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type: 1,
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layerIndex: 0
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});
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if(this.p.dataAsset) {
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this.load(this.p.dataAsset);
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}
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this.blocks = [];
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this.p.blockW = this.p.tileW * this.p.blockTileW;
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this.p.blockH = this.p.tileH * this.p.blockTileH;
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this.colBounds = {};
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this.directions = [ 'top','left','right','bottom'];
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this.collisionObject = {
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p: {
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w: this.p.tileW,
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h: this.p.tileH,
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cx: this.p.tileW/2,
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cy: this.p.tileH/2
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}
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};
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this.collisionNormal = { separate: []};
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},
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load: function(dataAsset) {
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var fileParts = dataAsset.split("."),
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fileExt = fileParts[fileParts.length-1].toLowerCase(),
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data;
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if (fileExt === "json") {
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data = Q._isString(dataAsset) ? Q.asset(dataAsset) : dataAsset;
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}
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else if (fileExt === "tmx" || fileExt === "xml") {
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var parser = new DOMParser(),
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doc = parser.parseFromString(Q.asset(dataAsset), "application/xml");
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var layer = doc.getElementsByTagName("layer")[this.p.layerIndex],
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width = parseInt(layer.getAttribute("width"),10),
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height = parseInt(layer.getAttribute("height"),10);
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var tiles = layer.getElementsByTagName("tile"),
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idx = 0;
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data = [];
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for(var y = 0;y < height;y++) {
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data[y] = [];
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for(var x = 0;x < width;x++) {
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var tile = tiles[idx];
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data[y].push(parseInt(tile.getAttribute("gid")-1,10));
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idx++;
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}
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}
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}
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else {
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throw "file type not supported";
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}
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this.p.tiles = data;
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this.p.rows = data.length;
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this.p.cols = data[0].length;
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this.p.w = this.p.cols * this.p.tileW;
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this.p.h = this.p.rows * this.p.tileH;
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},
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getTile: function(tileX,tileY) {
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return this.p.tiles[tileY] && this.p.tiles[tileY][tileX];
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},
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setTile: function(x,y,tile) {
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var p = this.p,
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blockX = Math.floor(x/p.blockTileW),
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blockY = Math.floor(y/p.blockTileH);
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if(blockX >= 0 && blockY >= 0 &&
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blockX < this.p.cols &&
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blockY < this.p.rows) {
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this.p.tiles[y][x] = tile;
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if(this.blocks[blockY]) {
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this.blocks[blockY][blockX] = null;
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}
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}
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},
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tilePresent: function(tileX,tileY) {
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return this.p.tiles[tileY] && this.collidableTile(this.p.tiles[tileY][tileX]);
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},
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// Overload this method to draw tiles at frame 0 or not draw
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// tiles at higher number frames
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drawableTile: function(tileNum) {
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return tileNum > 0;
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},
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// Overload this method to control which tiles trigger a collision
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// (defaults to all tiles > number 0)
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collidableTile: function(tileNum) {
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return tileNum > 0;
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},
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collide: function(obj) {
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var p = this.p,
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tileStartX = Math.floor((obj.p.x - obj.p.cx - p.x) / p.tileW),
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tileStartY = Math.floor((obj.p.y - obj.p.cy - p.y) / p.tileH),
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tileEndX = Math.ceil((obj.p.x - obj.p.cx + obj.p.w - p.x) / p.tileW),
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tileEndY = Math.ceil((obj.p.y - obj.p.cy + obj.p.h - p.y) / p.tileH),
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colObj = this.collisionObject,
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normal = this.collisionNormal,
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col;
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normal.collided = false;
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for(var tileY = tileStartY; tileY<=tileEndY; tileY++) {
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for(var tileX = tileStartX; tileX<=tileEndX; tileX++) {
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if(this.tilePresent(tileX,tileY)) {
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colObj.p.x = tileX * p.tileW + p.x + p.tileW/2;
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colObj.p.y = tileY * p.tileH + p.y + p.tileH/2;
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col = Q.collision(obj,colObj);
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if(col && col.magnitude > 0 &&
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(!normal.collided || normal.magnitude < col.magnitude )) {
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normal.collided = true;
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normal.separate[0] = col.separate[0];
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normal.separate[1] = col.separate[1];
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normal.magnitude = col.magnitude;
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normal.distance = col.distance;
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normal.normalX = col.normalX;
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normal.normalY = col.normalY;
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normal.tileX = tileX;
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normal.tileY = tileY;
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normal.tile = this.getTile(tileX,tileY);
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}
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}
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}
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}
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return normal.collided ? normal : false;
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},
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prerenderBlock: function(blockX,blockY) {
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var p = this.p,
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tiles = p.tiles,
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sheet = this.sheet(),
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blockOffsetX = blockX*p.blockTileW,
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blockOffsetY = blockY*p.blockTileH;
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if(blockOffsetX < 0 || blockOffsetX >= this.p.cols ||
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blockOffsetY < 0 || blockOffsetY >= this.p.rows) {
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return;
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}
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var canvas = document.createElement('canvas'),
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ctx = canvas.getContext('2d');
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canvas.width = p.blockW;
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canvas.height= p.blockH;
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this.blocks[blockY] = this.blocks[blockY] || {};
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this.blocks[blockY][blockX] = canvas;
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for(var y=0;y<p.blockTileH;y++) {
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if(tiles[y+blockOffsetY]) {
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for(var x=0;x<p.blockTileW;x++) {
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if(this.drawableTile(tiles[y+blockOffsetY][x+blockOffsetX])) {
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sheet.draw(ctx,
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x*p.tileW,
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y*p.tileH,
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tiles[y+blockOffsetY][x+blockOffsetX]);
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}
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}
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}
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}
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},
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drawBlock: function(ctx, blockX, blockY) {
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var p = this.p,
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startX = Math.floor(blockX * p.blockW + p.x),
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startY = Math.floor(blockY * p.blockH + p.y);
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if(!this.blocks[blockY] || !this.blocks[blockY][blockX]) {
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this.prerenderBlock(blockX,blockY);
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}
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if(this.blocks[blockY] && this.blocks[blockY][blockX]) {
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ctx.drawImage(this.blocks[blockY][blockX],startX,startY);
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}
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},
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draw: function(ctx) {
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var p = this.p,
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viewport = this.stage.viewport,
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scale = viewport ? viewport.scale : 1,
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x = viewport ? viewport.x : 0,
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y = viewport ? viewport.y : 0,
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viewW = Q.width / scale,
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viewH = Q.height / scale,
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startBlockX = Math.floor((x - p.x) / p.blockW),
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startBlockY = Math.floor((y - p.y) / p.blockH),
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endBlockX = Math.floor((x + viewW - p.x) / p.blockW),
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endBlockY = Math.floor((y + viewH - p.y) / p.blockH);
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for(var iy=startBlockY;iy<=endBlockY;iy++) {
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for(var ix=startBlockX;ix<=endBlockX;ix++) {
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this.drawBlock(ctx,ix,iy);
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}
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}
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}
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});
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Q.gravityY = 9.8*100;
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Q.gravityX = 0;
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Q.component('2d',{
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added: function() {
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var entity = this.entity;
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Q._defaults(entity.p,{
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vx: 0,
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vy: 0,
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ax: 0,
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ay: 0,
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gravity: 1,
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collisionMask: Q.SPRITE_DEFAULT
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});
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entity.on('step',this,"step");
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entity.on('hit',this,'collision');
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},
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collision: function(col,last) {
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var entity = this.entity,
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p = entity.p,
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magnitude = 0;
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if(col.obj.p && col.obj.p.sensor) {
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col.obj.trigger("sensor",entity);
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return;
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}
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col.impact = 0;
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var impactX = Math.abs(p.vx);
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var impactY = Math.abs(p.vy);
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p.x -= col.separate[0];
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p.y -= col.separate[1];
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// Top collision
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if(col.normalY < -0.3) {
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if(p.vy > 0) { p.vy = 0; }
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col.impact = impactY;
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entity.trigger("bump.bottom",col);
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}
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if(col.normalY > 0.3) {
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if(p.vy < 0) { p.vy = 0; }
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col.impact = impactY;
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entity.trigger("bump.top",col);
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}
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if(col.normalX < -0.3) {
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if(p.vx > 0) { p.vx = 0; }
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col.impact = impactX;
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entity.trigger("bump.right",col);
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}
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if(col.normalX > 0.3) {
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if(p.vx < 0) { p.vx = 0; }
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col.impact = impactX;
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entity.trigger("bump.left",col);
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}
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},
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step: function(dt) {
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var p = this.entity.p,
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dtStep = dt;
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// TODO: check the entity's magnitude of vx and vy,
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// reduce the max dtStep if necessary to prevent
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// skipping through objects.
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while(dtStep > 0) {
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dt = Math.min(1/30,dtStep);
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// Updated based on the velocity and acceleration
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p.vx += p.ax * dt + (p.gravityX === void 0 ? Q.gravityX : p.gravityX) * dt * p.gravity;
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p.vy += p.ay * dt + (p.gravityY === void 0 ? Q.gravityY : p.gravityY) * dt * p.gravity;
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p.x += p.vx * dt;
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p.y += p.vy * dt;
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this.entity.stage.collide(this.entity);
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dtStep -= dt;
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}
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}
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});
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Q.component('aiBounce', {
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added: function() {
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this.entity.on("bump.right",this,"goLeft");
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this.entity.on("bump.left",this,"goRight");
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},
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goLeft: function(col) {
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this.entity.p.vx = -col.impact;
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if(this.entity.p.defaultDirection === 'right') {
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this.entity.p.flip = 'x';
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}
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else {
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this.entity.p.flip = false;
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}
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},
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goRight: function(col) {
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this.entity.p.vx = col.impact;
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if(this.entity.p.defaultDirection === 'left') {
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this.entity.p.flip = 'x';
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}
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else {
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this.entity.p.flip = false;
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}
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}
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});
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};
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