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twwebgl.js
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twwebgl.js
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var tw = {
// Constants
// Tile flags
TILEFLAG_VFLIP: 1,
TILEFLAG_HFLIP: 2,
TILEFLAG_OPAQUE: 4,
TILEFLAG_ROTATE: 8,
LAYERTYPE_INVALID: 0,
LAYERTYPE_GAME: 1,
LAYERTYPE_TILES: 2,
LAYERTYPE_QUADS: 3,
MAPITEMTYPE_VERSION: 0,
MAPITEMTYPE_INFO: 1,
MAPITEMTYPE_IMAGE: 2,
MAPITEMTYPE_ENVELOPE: 3,
MAPITEMTYPE_GROUP: 4,
MAPITEMTYPE_LAYER: 5,
MAPITEMTYPE_ENVPOINTS: 6,
}
tw.init = function(attrs) {
tw.canvas = document.getElementById("cnvs");
// Change background color of canvas to black
// to avoid white border artefacts
tw.canvas.style.background = "#000000"
try {
tw.gl = tw.canvas.getContext("webgl") || tw.canvas.getContext("experimental-webgl");
} catch (e) {
alert("Failed to initialise webgl: '" + e + "'");
return; // Failed to initialize webgl :/
}
if (!tw.gl) {
alert("Failed to initialise webgl");
return;
}
// Enable GL_BLEND for transparent textures
tw.gl.enable(tw.gl.BLEND);
tw.gl.blendFunc(tw.gl.SRC_ALPHA, tw.gl.ONE_MINUS_SRC_ALPHA);
// Init shaders
tw.stdShader = tw.gl.createProgram();
var fShader = tw.buildShader(tw.fragmentShader, tw.gl.FRAGMENT_SHADER);
var vShader = tw.buildShader(tw.vertexShader, tw.gl.VERTEX_SHADER);
if (!fShader || !vShader) {
alert("Compiling shaders failed");
return;
}
tw.gl.attachShader(tw.stdShader, fShader);
tw.gl.attachShader(tw.stdShader, vShader);
tw.gl.linkProgram(tw.stdShader);
if (!tw.gl.getProgramParameter(tw.stdShader, tw.gl.LINK_STATUS)) {
alert(tw.gl.getProgramInfoLog(tw.stdShader));
return;
}
tw.gl.useProgram(tw.stdShader);
// Attribute / uniform references
// Vertex position attribute
tw.stdShader.vPosAttr = tw.gl.getAttribLocation(tw.stdShader, "aPosition");
tw.gl.enableVertexAttribArray(tw.stdShader.vPosAttr);
// Vertex color attribute
tw.stdShader.vVertexColor = tw.gl.getAttribLocation(tw.stdShader, "aVertexColor");
// Tex coord attribute
tw.stdShader.vTexCoordAttr = tw.gl.getAttribLocation(tw.stdShader, "aTexCoord");
// Move / projection matrix
tw.stdShader.pMatUni = tw.gl.getUniformLocation(tw.stdShader, "uPMatrix");
tw.stdShader.mvMatUni = tw.gl.getUniformLocation(tw.stdShader, "uMVMatrix");
// Texture sampler
tw.stdShader.uSampler = tw.gl.getUniformLocation(tw.stdShader, "uSampler");
// Frag color mask
tw.stdShader.uColorMask = tw.gl.getUniformLocation(tw.stdShader, "uColorMask");
tw.gl.uniform4fv(tw.stdShader.uColorMask, [1.0, 1.0, 1.0, 1.0]); // Reset
// Using texture coords
tw.stdShader.uTexCoord = tw.gl.getUniformLocation(tw.stdShader, "uTexCoord");
tw.gl.uniform1i(tw.stdShader.uTexCoord, 0); // Reset
// Using vertex color
tw.stdShader.uVertexColor = tw.gl.getUniformLocation(tw.stdShader, "uVertexColor");
tw.gl.uniform1i(tw.stdShader.uVertexColor, 0); // Reset
tw.gl.clearColor(0.5, 0.5, 0.5, 1.0);
tw.aspect = 1;
// Matrices
tw.prjMat = mat4.create();
tw.mvMat = mat4.create();
// Temp objects
tw.tmpMat = mat4.create();
tw.tmpVec4 = vec4.create();
tw.tmpBuf = tw.gl.createBuffer();
// Camera
tw.cameraPos = [0.0, 0.0]
tw.cameraZoom = 1.0
// Mapscreen
tw.mapScreen = vec4.create();
tw.worldView = [1000, 1000];
tw.screenResize();
tw.mousePressed = false
tw.mouseDownPos = [0.0, 0.0]
tw.mouseLastPos = [0.0, 0.0]
tw.mouseDownInc = [0.0, 0.0]
// Mouse events
$("#cnvs").mousedown(function(e) {
tw.mousePressed = true;
tw.mouseDownPos[0] = e.clientX;
tw.mouseDownPos[1] = e.clientY;
tw.mouseDownInc[0] = 0;
tw.mouseDownInc[1] = 0;
});
$(document).on("blur mouseup", function(e) {
tw.mousePressed = false;
});
$("#cnvs").mousemove(function(e) {
if (tw.mousePressed) {
tw.mouseDownInc[0] += tw.mouseLastPos[0] - e.clientX;
tw.mouseDownInc[1] += tw.mouseLastPos[1] - e.clientY;
}
tw.mouseLastPos[0] = e.clientX;
tw.mouseLastPos[1] = e.clientY;
});
$("#cnvs").mousewheel(function(event, delta, deltaX, deltaY) {
// Change camera zoom on mosewheel
tw.cameraZoom += deltaY * (tw.cameraZoom / 10);
tw.zoomed = true;
});
tw.zoomed = false
// Touch (even multi)
tw.touchScaling = false;
tw.touchDistance = 0;
$("#cnvs").on("touchstart", function (e) {
var e = e.originalEvent;
tw.mousePressed = true;
tw.mouseLastPos[0] = e.touches[0].clientX;
tw.mouseLastPos[1] = e.touches[0].clientY;
/* pinch */
if (e.touches.length === 2) {
tw.touchScaling = true;
tw.touchDistance = getDistance(e);
}
});
$("#cnvs").on("touchmove", function (e) {
var e = e.originalEvent;
if (tw.mousePressed) {
tw.mouseDownInc[0] += tw.mouseLastPos[0] - e.touches[0].clientX;
tw.mouseDownInc[1] += tw.mouseLastPos[1] - e.touches[0].clientY;
}
tw.mouseLastPos[0] = e.touches[0].clientX;
tw.mouseLastPos[1] = e.touches[0].clientY;
/* pinch */
if (tw.touchScaling) {
var prev = tw.touchDistance;
tw.touchDistance = getDistance(e);
tw.cameraZoom = (tw.touchDistance / prev) * tw.cameraZoom;
}
});
$(document).on("touchend", function (e) {
tw.mousePressed = false;
/* pinch */
tw.touchScaling = false;
});
function getDistance(e) {
return Math.sqrt(
(e.touches[0].clientX - e.touches[1].clientX) * (e.touches[0].clientX - e.touches[1].clientX) +
(e.touches[0].clientY - e.touches[1].clientY) * (e.touches[0].clientY - e.touches[1].clientY));
}
var me = this;
if (attrs.mapData) {
this.map = new tw.Map(attrs.mapData);
tw.mainLoop();
} else if (attrs.mapUrl) {
var req = new XMLHttpRequest();
req.open("GET", attrs.mapUrl + ".map", true);
req.responseType = "arraybuffer";
req.onload = function(evt) {
me.map = new tw.Map(evt.target.response);
tw.mainLoop();
}
req.send(null);
console.log(req)
}
}
// Enable / Disable shader flags
tw.sTexCoords = function(state) {
if (state)
tw.gl.enableVertexAttribArray(tw.stdShader.vTexCoordAttr);
else
tw.gl.disableVertexAttribArray(tw.stdShader.vTexCoordAttr);
tw.gl.uniform1i(tw.stdShader.uTexCoord, state);
}
tw.sVertexColor = function(state) {
if (state)
tw.gl.enableVertexAttribArray(tw.stdShader.vVertexColor);
else
tw.gl.disableVertexAttribArray(tw.stdShader.vVertexColor);
tw.gl.uniform1i(tw.stdShader.uVertexColor, state);
}
tw.setColorMask = function(rgba) {
tw.gl.uniform4fv(tw.stdShader.uColorMask, rgba); // Reset
}
tw.setMapScreen = function(topLeftX, topLeftY, bottomRightX, bottomRightY) {
tw.mapScreen[0] = topLeftX;
tw.mapScreen[1] = topLeftY;
tw.mapScreen[2] = bottomRightX;
tw.mapScreen[3] = bottomRightY;
}
tw.getParams = function() {
if (location.search === "") return {};
var o = {}, nvPairs = location.search.substr(1).replace(/\+/g, " ").split("&");
nvPairs.forEach(function(pair) {
var e = pair.indexOf('=');
var n = decodeURIComponent(e < 0 ? pair : pair.substr(0, e)),
v = (e < 0 || e + 1 == pair.length) ? null :
decodeURIComponent(pair.substr(e + 1, pair.length - e));
if (!(n in o))
o[n] = v;
else if (o[n] instanceof Array)
o[n].push(v);
else
o[n] = [o[n], v];
});
return o;
}
tw.parseMapGroup = function(groupData) {
var obj = {}
var d = new DataView(groupData);
d.resetReader();
obj.version = d.uint32();
obj.offsX = d.int32();
obj.offsY = d.int32();
obj.parallaxX = d.int32();
obj.parallaxY = d.int32();
obj.startLayer = d.uint32();
obj.numLayers = d.uint32();
obj.useClipping = d.uint32();
obj.clipX = d.int32();
obj.clipY = d.int32();
obj.clipW = d.int32();
obj.clipH = d.int32();
return obj;
}
tw.parseMapLayer = function(layerData) {
var obj = {}
var d = new DataView(layerData);
d.resetReader();
obj.version = d.uint32();
obj.type = d.uint32();
obj.flags = d.uint32();
return obj;
}
tw.parseMapLayerQuads = function(layerData) {
var obj = {}
var d = new DataView(layerData);
d.resetReader();
/*obj.version =*/
d.uint32();
/*obj.type =*/
d.uint32();
/*obj.flags =*/
d.uint32();
obj.version = d.uint32();
obj.numQuads = d.uint32();
obj.data = d.int32();
obj.image = d.int32();
return obj;
}
tw.parseMapLayerTiles = function(layerData) {
var obj = {}
var d = new DataView(layerData);
d.resetReader();
/*obj.version =*/
d.uint32();
/*obj.type =*/
d.uint32();
/*obj.flags =*/
d.uint32();
obj.version = d.uint32();
obj.width = d.int32();
obj.height = d.int32();
obj.flags = d.uint32();
obj.color = [d.uint32() & 0xff, d.uint32() & 0xff, d.uint32() & 0xff, d.uint32() & 0xff]
obj.colorEnv = d.int32();
obj.colorEnvOffset = d.int32();
obj.image = d.int32();
obj.data = d.int32();
//TODO: name
return obj;
}
tw.parseLayerQuads = function(layerData, num) {
var quads = []
var d = new DataView(layerData);
d.resetReader();
for (var q = 0; q < num; q++) {
var obj = {};
quads.push(obj);
obj.points = []
for (var i = 0; i < 5; i++) {
obj.points.push({
x: d.int32(),
y: d.int32()
});
}
obj.colors = []
for (var i = 0; i < 4; i++) {
obj.colors.push({
r: d.uint32() & 0xff,
g: d.uint32() & 0xff,
b: d.uint32() & 0xff,
a: d.uint32() & 0xff
});
}
obj.texCoords = []
for (var i = 0; i < 4; i++) {
obj.texCoords.push({
x: d.int32(),
y: d.int32()
});
}
obj.posEnv = d.int32();
obj.posEnvOffset = d.int32();
obj.colorEnv = d.int32();
obj.colorEnvOffset = d.int32();
}
return quads;
}
tw.parseLayerTiles = function(tileData, num) {
var tiles = []
var d = new DataView(tileData);
d.resetReader();
for (var i = 0; i < num; i++) {
tiles.push({
index: d.uint8(),
flags: d.uint8()
})
// skip, reserved
d.uint8();
d.uint8();
}
return tiles;
}
tw.parseMapImage = function(layerData) {
var obj = {}
var d = new DataView(layerData);
d.resetReader();
obj.version = d.uint32();
obj.width = d.int32();
obj.height = d.int32();
obj.external = d.uint32();
obj.imageName = d.int32();
obj.imageData = d.int32();
return obj;
}
tw.getCString = function(buf) {
var len;
buf = new Uint8Array(buf);
for (len = 0; len < buf.byteLength; len++) {
if (buf[len] == 0)
break;
}
return String.fromCharCode.apply(null, buf.subarray(0, len));
}
tw.Map = function(mapData) {
this.textures = []; // loaded textures
this.groups = [];
this.dataFile = new TwDataFile("", mapData)
this.dataFile.parse();
var dFile = this.dataFile;
// map images
var imgsInfo = dFile.getType(tw.MAPITEMTYPE_IMAGE);
for (var i = 0; i < imgsInfo.num; i++) {
var imgItem = dFile.getItem(imgsInfo.start + i);
var imgInfo = tw.parseMapImage(imgItem.data);
var imgName = tw.getCString(dFile.getData(imgInfo.imageName));
if (imgInfo.external) {
// load external texture
var url = imgName + ".png";
var tex = tw.loadTexture({
extern: true,
imgUrl: url,
name: imgName,
imgId: i,
width: imgInfo.width,
height: imgInfo.height
})
if (tex != undefined)
this.textures.push(tex);
} else {
var imgData = new Uint8Array(dFile.getData(imgInfo.imageData));
var tex = tw.loadTexture({
extern: false,
name: imgName,
imgId: i,
width: imgInfo.width,
height: imgInfo.height,
pixelBuf: imgData
})
if (tex != undefined)
this.textures.push(tex);
}
}
// groups, layers, tiles
var groupsInfo = dFile.getType(tw.MAPITEMTYPE_GROUP);
for (var g = 0; g < groupsInfo.num; g++) {
var groupItem = dFile.getItem(groupsInfo.start + g);
var groupInfo = tw.parseMapGroup(groupItem.data);
var grp = new tw.Map.Group(this, groupInfo);
this.groups.push(grp);
var layersInfo = dFile.getType(tw.MAPITEMTYPE_LAYER);
var first = true;
for (var l = 0; l < groupInfo.numLayers; l++) {
var layerItem = dFile.getItem(layersInfo.start + groupInfo.startLayer + l);
var layerInfo = tw.parseMapLayer(layerItem.data);
if (layerInfo.type == tw.LAYERTYPE_TILES) {
var tileLayerInfo = tw.parseMapLayerTiles(layerItem.data);
if (tileLayerInfo.image == -1) {
if (first) {
var tileData = dFile.getData(tileLayerInfo.data);
var tiles = tw.parseLayerTiles(tileData, tileLayerInfo.width * tileLayerInfo.height);
for (var y = 0; y < tileLayerInfo.height && first; y++) {
for (var x = 0; x < tileLayerInfo.width; x++) {
var t = tiles[y * tileLayerInfo.width + x];
if (t.index == 192) {
tw.cameraPos[0] = x * 32;
tw.cameraPos[1] = y * 32;
first = false;
break;
}
}
}
first = true;
}
continue;
}
var tex = this.getTex(tileLayerInfo.image);
if (tex == undefined)
console.log("couldn't find texture", quadLayerInfo.image);
else {
// load tiles
var tileData = dFile.getData(tileLayerInfo.data);
var tiles = tw.parseLayerTiles(tileData, tileLayerInfo.width * tileLayerInfo.height);
// add layer
grp.addTileLayer(tileLayerInfo.width, tileLayerInfo.height, tiles, tileLayerInfo.color, tex);
}
} else if (layerInfo.type == tw.LAYERTYPE_QUADS) {
var quadLayerInfo = tw.parseMapLayerQuads(layerItem.data);
var tex;
if (quadLayerInfo.image != -1)
tex = this.getTex(quadLayerInfo.image);
var quadData = dFile.getData(quadLayerInfo.data);
var quads = tw.parseLayerQuads(quadData, quadLayerInfo.numQuads);
var tex = this.getTex(quadLayerInfo.image);
grp.addQuadLayer(tex, quads);
}
}
}
}
tw.Map.prototype.getTex = function(imgId) {
for (var i = 0; i < this.textures.length; i++) {
if (this.textures[i].imgId == imgId)
return this.textures[i];
}
}
tw.QuadLayer = function(texture, quads) {
this.type = tw.LAYERTYPE_QUADS;
this.texture = texture;
this.quads = [];
// vertices buffer for all quads of this layer
this.vBuf = new Float32Array(quads.length * 4 * 2);
this.glVertexBuf = tw.gl.createBuffer();
// vertex color buffer
this.cBuf = new Float32Array(quads.length * 4 * 4);
this.glColorBuf = tw.gl.createBuffer();
// texture coords buffer
this.tBuf = new Float32Array(quads.length * 4 * 2);
this.glTexBuf = tw.gl.createBuffer();
// index buffer
this.iBuf = new Uint16Array(quads.length * 6);
this.glIndexBuf = tw.gl.createBuffer();
// Clone quads
for (var i = 0; i < quads.length; i++) {
this.quads.push(jQuery.extend(true, {}, quads[i]));
}
}
tw.QuadLayer.prototype.tick = function() {
// Init buffers
for (var i = 0; i < this.quads.length; i++) {
var q = this.quads[i];
var vertices = [
q.points[0].x / 1024, q.points[0].y / 1024,
q.points[2].x / 1024, q.points[2].y / 1024,
q.points[3].x / 1024, q.points[3].y / 1024,
q.points[1].x / 1024, q.points[1].y / 1024
];
this.vBuf.set(vertices, i * 8);
}
// Vertex color
for (var i = 0; i < this.quads.length; i++) {
var q = this.quads[i];
var colors = [
q.colors[0].r / 255, q.colors[0].g / 255, q.colors[0].b / 255, q.colors[0].a / 255,
q.colors[2].r / 255, q.colors[2].g / 255, q.colors[2].b / 255, q.colors[2].a / 255,
q.colors[3].r / 255, q.colors[3].g / 255, q.colors[3].b / 255, q.colors[3].a / 255,
q.colors[1].r / 255, q.colors[1].g / 255, q.colors[1].b / 255, q.colors[1].a / 255,
];
this.cBuf.set(colors, i * 16);
}
// Texture coords
for (var i = 0; i < this.quads.length; i++) {
var q = this.quads[i];
var coords = [
q.texCoords[0].x / 1024, q.texCoords[0].y / 1024,
q.texCoords[2].x / 1024, q.texCoords[2].y / 1024,
q.texCoords[3].x / 1024, q.texCoords[3].y / 1024,
q.texCoords[1].x / 1024, q.texCoords[1].y / 1024,
];
this.tBuf.set(coords, i * 8);
}
// Indices
var t = 0;
for (var i = 0; i < this.quads.length * 4; i += 4) {
var indices = [
i, i + 1, i + 2,
i, i + 2, i + 3
];
this.iBuf.set(indices, t * 6);
t++;
}
// Build gl buffers
tw.gl.bindBuffer(tw.gl.ARRAY_BUFFER, this.glVertexBuf);
tw.gl.bufferData(tw.gl.ARRAY_BUFFER, this.vBuf, tw.gl.STATIC_DRAW);
tw.gl.bindBuffer(tw.gl.ARRAY_BUFFER, this.glColorBuf);
tw.gl.bufferData(tw.gl.ARRAY_BUFFER, this.cBuf, tw.gl.STATIC_DRAW);
tw.gl.bindBuffer(tw.gl.ARRAY_BUFFER, this.glTexBuf);
tw.gl.bufferData(tw.gl.ARRAY_BUFFER, this.tBuf, tw.gl.STATIC_DRAW);
tw.gl.bindBuffer(tw.gl.ELEMENT_ARRAY_BUFFER, this.glIndexBuf);
tw.gl.bufferData(tw.gl.ELEMENT_ARRAY_BUFFER, this.iBuf, tw.gl.STATIC_DRAW);
}
tw.renderLine = function(x1, y1, x2, y2) {
tw.gl.bindBuffer(tw.gl.ARRAY_BUFFER, tw.tmpBuf);
tw.gl.bufferData(tw.gl.ARRAY_BUFFER, new Float32Array([x1, y1, x2, y2]), tw.gl.STATIC_DRAW);
tw.gl.vertexAttribPointer(tw.stdShader.vPosAttr, 2, tw.gl.FLOAT, false, 0, 0);
tw.gl.drawArrays(tw.gl.LINES, 0, 2);
}
tw.QuadLayer.prototype.render = function() {
if (this.texture == undefined)
tw.sTexCoords(0); //textureless quad
else if (!this.texture.loaded)
return; // texture not loaded
else {
tw.sTexCoords(1);
tw.gl.bindTexture(tw.gl.TEXTURE_2D, this.texture.glTex);
}
// Enable vertex colors
tw.sVertexColor(1);
tw.setMatUniforms();
tw.setColorMask([1.0, 1.0, 1.0, 1.0]);
// Set attributes
tw.gl.bindBuffer(tw.gl.ARRAY_BUFFER, this.glVertexBuf);
tw.gl.vertexAttribPointer(tw.stdShader.vPosAttr, 2, tw.gl.FLOAT, false, 0, 0);
tw.gl.bindBuffer(tw.gl.ARRAY_BUFFER, this.glColorBuf);
tw.gl.vertexAttribPointer(tw.stdShader.vVertexColor, 4, tw.gl.FLOAT, false, 0, 0);
tw.gl.bindBuffer(tw.gl.ARRAY_BUFFER, this.glTexBuf);
tw.gl.vertexAttribPointer(tw.stdShader.vTexCoordAttr, 2, tw.gl.FLOAT, false, 0, 0);
tw.gl.bindBuffer(tw.gl.ELEMENT_ARRAY_BUFFER, this.glIndexBuf);
tw.gl.drawElements(tw.gl.TRIANGLES, this.quads.length * 6, tw.gl.UNSIGNED_SHORT, 0);
// keep textures disabled by default
tw.sTexCoords(0);
}
tw.Map.Group = function(map, info) {
this.paraX = info.parallaxX;
this.paraY = info.parallaxY;
this.offsX = info.offsX;
this.offsY = info.offsY;
this.map = map;
this.layers = [];
}
tw.Map.Group.prototype.addQuadLayer = function(texture, quads) {
this.layers.push(new tw.QuadLayer(texture, quads));
}
tw.Map.Group.prototype.addTileLayer = function(width, height, tiles, color, texture) {
var newLayer = new tw.TileLayer(width, height, tiles, color, this);
newLayer.texture = texture;
this.layers.push(newLayer);
}
tw.Map.Group.prototype.tick = function() {
for (var i = 0; i < this.layers.length; i++)
this.layers[i].tick();
}
tw.Map.Group.prototype.initMapScreen = function() {
var width = tw.worldView[0] * tw.aspect;
var height = tw.worldView[1];
var cx = tw.cameraPos[0] * (this.paraX / 100);
var cy = tw.cameraPos[1] * (this.paraY / 100);
var zoom = tw.cameraZoom;
if (this.paraX === 0 && this.paraY === 0) {
zoom = 4; // not sure about this constant but seems to work
}
width *= 1 / zoom;
height *= 1 / zoom;
var p1 = this.offsX + cx - width / 2;
var p2 = this.offsY + cy - height / 2;
var p3 = p1 + width;
var p4 = p2 + height;
tw.setMapScreen(p1, p2, p3, p4);
}
tw.initPrjMat = function() {
// Init projection matrix
mat4.ortho(tw.prjMat, tw.mapScreen[0], tw.mapScreen[2], tw.mapScreen[3], tw.mapScreen[1], 1, -1);
tw.setMatUniforms();
}
tw.Map.Group.prototype.render = function() {
this.initMapScreen();
tw.initPrjMat();
for (var i = 0; i < this.layers.length; i++)
this.layers[i].render();
}
tw.Map.prototype.tick = function() {
for (var i = 0; i < this.groups.length; i++)
this.groups[i].tick();
}
// test function
tw.buildImage = function(width, height, buf) {
var cnvs = document.createElement("canvas");
var ctx = cnvs.getContext("2d");
var imgData = ctx.createImageData(width, height);
var len = width * height;
for (var i = 0; i < len * 4; i++) {
imgData.data[i] = buf[i];
}
cnvs.width = width;
cnvs.height = height;
ctx.putImageData(imgData, 0, 0);
// export as png
var img = new Image();
img.src = cnvs.toDataURL();
return img;
}
tw.Map.prototype.render = function() {
// Render all groups
for (var i = 0; i < this.groups.length; i++)
this.groups[i].render();
// Unbind texture
tw.gl.bindTexture(tw.gl.TEXTURE_2D, null);
}
tw.isPowerOfTwo = function(x) {
while (((x & 1) == 0) && x > 1)
x >>= 1;
return (x == 1);
}
tw.loadTexture = function(attrs) {
var gl = tw.gl;
var tex = {
name: attrs.name,
imgId: attrs.imgId,
width: attrs.width,
height: attrs.height,
loaded: false
}
var powerOfTwo = true;
if (!tw.isPowerOfTwo(attrs.width) || !tw.isPowerOfTwo(attrs.height)) {
console.log("tex", attrs.name, "not power of 2")
powerOfTwo = false;
}
tex.glTex = tw.gl.createTexture();
if (attrs.extern) {
// load texture from image url
tex.image = new Image();
tex.image.src = attrs.imgUrl;
tex.image.onload = function(e) {
gl.bindTexture(gl.TEXTURE_2D, tex.glTex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, tex.image);
if (powerOfTwo) {
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_NEAREST);
gl.generateMipmap(gl.TEXTURE_2D);
} else {
// temporary fix for not power 2 images
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
}
gl.bindTexture(gl.TEXTURE_2D, null);
console.log("mapres", tex.name, "loaded (extern)");
tex.loaded = true;
}
tex.image.onerror = function(e) {
console.log("couldn't load", attrs.imgUrl)
}
} else {
// load texture from pixelbuffer
if (attrs.pixelBuf.length != attrs.width * attrs.height * 4)
console.log("invalid tex size", imgName, "size", imgData.length);
else {
gl.bindTexture(gl.TEXTURE_2D, tex.glTex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, attrs.width, attrs.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, attrs.pixelBuf);
if (powerOfTwo) {
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_NEAREST);
gl.generateMipmap(gl.TEXTURE_2D);
} else {
// temporary fix for not power 2 images
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
}
gl.bindTexture(gl.TEXTURE_2D, null);
console.log("mapres", tex.name, "loaded (intern)");
tex.loaded = true;
}
}
return tex;
}
window.requestAnimFrame = (function() {
if (window.requestAnimationFrame)
return window.requestAnimationFrame;
if (window.webkit && window.webkit.RequestAnimationFrame)
return window.webkit.RequestAnimationFrame;
if (window.mozRequestAnimationFrame)
return window.mozRequestAnimationFrame;
return function(cb) {
window.setTimeout(cb, 1000 / 60);
};
})();
tw.buildShader = function(str, type) {
var shader = tw.gl.createShader(type);
tw.gl.shaderSource(shader, str);
tw.gl.compileShader(shader);
if (!tw.gl.getShaderParameter(shader, tw.gl.COMPILE_STATUS)) {
console.log(tw.gl.getShaderInfoLog(shader));
return null;
}
return shader;
}
tw.mainLoop = function() {
// Transform mouse coords to world coords
tw.mouseDownInc[0] = tw.mouseDownInc[0] / tw.canvas.width * tw.worldView[0] * tw.aspect / tw.cameraZoom;
tw.mouseDownInc[1] = tw.mouseDownInc[1] / tw.canvas.height * tw.worldView[1] / tw.cameraZoom;
// Move camera
tw.cameraPos[0] += tw.mouseDownInc[0];
tw.cameraPos[1] += tw.mouseDownInc[1];
tw.mouseDownInc[0] = 0;
tw.mouseDownInc[1] = 0;
tw.render();
// Reset zoomed state
tw.zoomed = false;
requestAnimFrame(tw.mainLoop);
}
tw.setMatUniforms = function() {
tw.gl.uniformMatrix4fv(tw.stdShader.pMatUni, false, tw.prjMat);
tw.gl.uniformMatrix4fv(tw.stdShader.mvMatUni, false, tw.mvMat);
}
tw.screenResize = function() {
tw.canvas.width = window.innerWidth;
tw.canvas.height = window.innerHeight;
tw.aspect = tw.canvas.width / tw.canvas.height;
}
tw.render = function() {
var gl = tw.gl;
tw.screenResize();
// Set viewport
tw.gl.viewportWidth = tw.canvas.width;
tw.gl.viewportHeight = tw.canvas.height;
gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
// reset matrices
mat4.identity(tw.mvMat);
mat4.identity(tw.prjMat);
// enable texture 0
gl.activeTexture(gl.TEXTURE0);
gl.uniform1i(tw.stdShader.uSampler, 0);
this.map.tick();
this.map.render();
}
tw.TileLayer = function(width, height, tiles, color, group) {
this.type = tw.LAYERTYPE_TILES;
this.width = width;
this.height = height;
this.tiles = tiles;
this.numTiles = this.renderTileNum();
this.color = new Float32Array([color[0] / 255, color[1] / 255, color[2] / 255, color[3] / 255]);
this.vertexFloatArray = new Float32Array(this.numTiles * 12);
this.texCoordFloatArray = new Float32Array(this.numTiles * 12);
this.vertexBuf = undefined;
this.texCoordBuf = undefined;
this.tileSize = 32;