64 lines
1.8 KiB
JavaScript
64 lines
1.8 KiB
JavaScript
var raycast = raycast || {};
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raycast.texture = (function () {
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function load(id) {
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var canvas = document.createElement('canvas');
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var image = document.getElementById(id);
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canvas.width = image.width;
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canvas.height = image.height;
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var ctx = canvas.getContext('2d');
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ctx.drawImage(image, 0, 0);
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var imagedata = ctx.getImageData(0, 0, image.width, image.height);
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var rgbArray = new Array(image.width * image.height);
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for( var i = 0; i < image.width * image.height; i++) {
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rgbArray[i] = [imagedata.data[4*i], imagedata.data[4*i+1], imagedata.data[4*i+2]];
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}
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image.width = 0;
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image.height = 0;
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return rgbArray;
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}
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var images = [];
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function initiateLoad(textures, onSuccess) {
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var n = textures.length;
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var counter = 0;
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var callback = function() {
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counter++;
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console.log(counter+" of "+n+" textures received")
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if (counter == n) onSuccess();
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}
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for (var i = 0; i < n; i++) {
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var image = new Image()
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image.onload = callback;
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image.src = textures[i];
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images.push(image);
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}
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}
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function getTextures() {
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var n = images.length;
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var textures = [];
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for (var i = 0; i < n; i++) {
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var canvas = document.createElement('canvas');
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var image = images[i];
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canvas.width = image.width;
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canvas.height = image.height;
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var ctx = canvas.getContext('2d');
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ctx.drawImage(image, 0, 0);
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var imagedata = ctx.getImageData(0, 0, image.width, image.height);
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var rgbArray = new Array(image.width * image.height);
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for(var j = 0; j < image.width * image.height; j++) {
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rgbArray[j] = [imagedata.data[4*j], imagedata.data[4*j+1], imagedata.data[4*j+2]];
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}
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textures.push(rgbArray);
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}
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return textures;
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}
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return {load: load, initiateLoad: initiateLoad, getTextures: getTextures};
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}());
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