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runPJS_onKA.js
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runPJS_onKA.js
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/*
When this script loads it automatically searches for a script that has the id "PJS_code"
It then replaces that script with a canvas and a script that runs the code in a Processing.js instance
You can set data-width and data-height for the script. If these are not set then they default to 400.
The script header should look something like this:
<script id="PJS_code" type="data" data-width="600" data-height="600">
You can also call createPJS(code, options*) to create a Processing.js instance; its arguments are
1) a string or function containing PJS code
2) an object containing options
Using options you can control:
what canvas to draw to
where that canvas is located
the width of the instance
the height of the instance
do something when the PJS instance is created
Layout of the options:
{
canvas: <HTML_CANVAS_ELEMENT>
container: <HTML_ELEMENT>
width: <INTEGER>
height: <INTEGER>
callback: <FUNCTION>
}
Note: The auto-find for a script containing the id "PJS_code" is a legacy feature and is not recommended. It is better to use the createPJS function.
*/
console.log("runPJS_onKA.js is deprecated; use runPJS.js instead!!!");
console.log("runPJS_onKA.js is deprecated; use runPJS.js instead!!!");
console.log("runPJS_onKA.js is deprecated; use runPJS.js instead!!!");
function createPJS (code, options) {
// create environment object
let pjsEnv = {};
if (!window.pjsEnvironments) {
window.pjsEnvironments = [];
}
window.pjsEnvironments.push(pjsEnv);
function generateCode (filling, canvas, width, height) {
return `
var pjsEnv = window.pjsEnvironments[${window.pjsEnvironments.length - 1}];
pjsEnv.processing = new Processing(${canvas}, function(processingInstance) {
processingInstance.size(${width}, ${height});
processingInstance.background(0, 0, 0, 0);
processingInstance.angleMode = 'degrees';
pjsEnv.canvas.addEventListener('mousemove', function() {
processingInstance.mouseY -= document.documentElement.scrollTop;
});
function getSound(s) {
let url = 'sounds/' + s + '.mp3';
return new Audio(url);
}
function playSound(s) {
s.play();
}
function getImage(file, callback) {
file = 'https://cdn.kastatic.org/third_party/javascript-khansrc/live-editor/build/images/' + file + '.png';
let imageCache = processingInstance.externals.sketch.imageCache;
let pimg;
if (imageCache.images[file]) {
pimg = new processingInstance.PImage(imageCache.images[file]);
pimg.loaded = true;
} else {
let img = new Image();
img.crossOrigin = "Anonymous";
img.src = file;
pimg = new processingInstance.PImage();
pimg.sourceImg = img;
img.onload = function () {
// change the <img> object into a PImage now that its loaded
pimg.fromHTMLImageData(img);
pimg.loaded = true;
imageCache.add(file, img);
callback();
};
img.onerror = function () {
console.log("Error loading image from " + file);
callback(true);
};
}
return pimg;
}
let getImageImages = ['animals/boxer-laying-down','animals/butterfly','animals/cat','animals/collies','animals/dog_sleeping-puppy','animals/fox','animals/kangaroos','animals/rabbit','animals/shark','animals/sleeping-puppy','creatures/Hopper-Jumping','avatars/aqualine-sapling','avatars/aqualine-seed','avatars/aqualine-seedling','avatars/aqualine-tree','avatars/aqualine-ultimate','avatars/avatar-team','avatars/cs-hopper-cool','avatars/cs-hopper-happy','avatars/cs-hopper-jumping','avatars/cs-ohnoes','avatars/cs-winston-baby','avatars/cs-winston','avatars/duskpin-sapling','avatars/duskpin-seed','avatars/duskpin-seedling','avatars/duskpin-tree','avatars/duskpin-ultimate','avatars/leaf-blue','avatars/leaf-green','avatars/leaf-grey','avatars/leaf-orange','avatars/leaf-red','avatars/leaf-yellow','avatars/leafers-sapling','avatars/leafers-seed','avatars/leafers-seedling','avatars/leafers-tree','avatars/leafers-ultimate','avatars/marcimus-orange','avatars/marcimus-purple','avatars/marcimus-red','avatars/marcimus','avatars/mr-pants-green','avatars/mr-pants-orange','avatars/mr-pants-pink','avatars/mr-pants-purple','avatars/mr-pants-with-hat','avatars/mr-pants','avatars/mr-pink-green','avatars/mr-pink-orange','avatars/mr-pink','avatars/mystery-2','avatars/old-spice-man-blue','avatars/old-spice-man','avatars/orange-juice-squid','avatars/piceratops-sapling','avatars/piceratops-seed','avatars/piceratops-seedling','avatars/piceratops-tree','avatars/piceratops-ultimate','avatars/primosaur-sapling','avatars/primosaur-seed','avatars/primosaur-seedling','avatars/primosaur-tree','avatars/primosaur-ultimate','avatars/purple-pi-pink','avatars/purple-pi-teal','avatars/purple-pi','avatars/questionmark','avatars/robot_female_1','avatars/robot_female_2','avatars/robot_female_3','avatars/robot_male_1','avatars/robot_male_2','avatars/robot_male_3','avatars/spunky-sam-green','avatars/spunky-sam-orange','avatars/spunky-sam-red','avatars/spunky-sam','avatars/starky-sapling','avatars/starky-seed','avatars/starky-seedling','avatars/starky-tree','avatars/starky-ultimate','creatures/BabyWinston','creatures/Hopper-Cool','creatures/Hopper-Happy','creatures/OhNoes-Happy','creatures/OhNoes-Hmm','creatures/OhNoes','creatures/Winston','cute/Blank','cute/BrownBlock','cute/CharacterBoy','cute/CharacterCatGirl','cute/CharacterHornGirl','cute/CharacterPinkGirl','cute/CharacterPrincessGirl','cute/ChestClosed','cute/ChestLid','cute/ChestOpen','cute/DirtBlock','cute/DoorTallClosed','cute/DoorTallOpen','cute/EnemyBug','cute/GemBlue','cute/GemGreen','cute/GemOrange','cute/GrassBlock','cute/Heart','cute/Key','cute/None','cute/PlainBlock','cute/RampEast','cute/RampNorth','cute/RampSouth','cute/RampWest','cute/Rock','cute/RoofEast','cute/RoofNorth','cute/RoofNorthEast','cute/RoofNorthWest','cute/RoofSouth','cute/RoofSouthEast','cute/RoofSouthWest','cute/RoofWest','cute/Selector','cute/ShadowEast','cute/ShadowNorth','cute/ShadowNorthEast','cute/ShadowNorthWest','cute/ShadowSideWest','cute/ShadowSouth','cute/ShadowSouthEast','cute/ShadowSouthWest','cute/ShadowWest','cute/Star','cute/StoneBlock','cute/StoneBlockTall','cute/TreeShort','cute/TreeTall','cute/TreeUgly','cute/WallBlock','cute/WallBlockTall','cute/WaterBlock','cute/WindowTall','cute/WoodBlock','food/berries','food/brussels-sprouts','food/coffee-beans','food/fish_grilled-snapper','food/grapes','food/ice-cream','food/oysters','food/potato-chips','food/shish-kebab','food/tomatoes','insideout/layer0blur0','insideout/layer0blur10','insideout/layer0blur20','insideout/layer0blur40','insideout/layer0blur80','insideout/layer1blur0','insideout/layer1blur10','insideout/layer1blur20','insideout/layer1blur40','insideout/layer1blur80','insideout/layer2blur0','insideout/layer2blur10','insideout/layer2blur20','insideout/layer2blur40','insideout/layer2blur80','insideout/layer3blur0','insideout/layer3blur10','insideout/layer3blur100','insideout/layer3blur20','insideout/layer3blur40','insideout/layer3blur80','insideout/shot1_layer0blur0','insideout/shot1_layer0blur10','insideout/shot1_layer0blur20','insideout/shot1_layer0blur40','insideout/shot1_layer0blur80','insideout/shot1_layer1blur0','insideout/shot1_layer1blur10','insideout/shot1_layer1blur20','insideout/shot1_layer1blur40','insideout/shot1_layer1blur80','insideout/shot1_layer2blur0','insideout/shot1_layer2blur10','insideout/shot1_layer2blur20','insideout/shot1_layer2blur40','insideout/shot1_layer2blur80','insideout/shot1_layer3blur0','insideout/shot1_layer3blur10','insideout/shot1_layer3blur20','insideout/shot1_layer3blur40','insideout/shot1_layer3blur80','insideout/shot1_layer4blur0','insideout/shot1_layer4blur10','insideout/shot1_layer4blur20','insideout/shot1_layer4blur40','insideout/shot1_layer4blur80','insideout/shot1_layer5blur0','insideout/shot1_layer5blur10','insideout/shot1_layer5blur20','insideout/shot1_layer5blur40','insideout/shot1_layer5blur80','insideout/shot2_layer0blur10','insideout/shot2_layer0blur20','insideout/shot2_layer0blur40','insideout/shot2_layer0blur80','insideout/shot2_layer1blur10','insideout/shot2_layer1blur20','insideout/shot2_layer1blur40','insideout/shot2_layer1blur80','insideout/shot2_layer2blur10','insideout/shot2_layer2blur20','insideout/shot2_layer2blur40','insideout/shot2_layer2blur80','insideout/shot2_layer3blur10','insideout/shot2_layer3blur20','insideout/shot2_layer3blur40','insideout/shot2_layer3blur80','insideout/shot2_layer4blur10','insideout/shot2_layer4blur20','insideout/shot2_layer4blur40','insideout/shot2_layer4blur80','landscapes/beach-in-hawaii','landscapes/beach-waves-at-sunset','landscapes/beach-waves-at-sunset2','landscapes/beach-waves-daytime','landscapes/clouds-from-plane','landscapes/fields-of-grain','landscapes/lake-steam-rising','landscapes/lava','landscapes/mountain_matterhorn','landscapes/mountains-and-lake','landscapes/sand-dunes','misc/tim-berners-lee','pixar/Incredibles_a_fill','pixar/Incredibles_a_fill_wFog','pixar/Incredibles_a_key','pixar/Incredibles_a_key_wFog','pixar/Incredibles_bnc','pixar/Incredibles_fillExt','pixar/Incredibles_fillInt','pixar/Incredibles_fill_wFog','pixar/Incredibles_kck','pixar/Incredibles_key','pixar/Incredibles_key_wFog','pixar/Incredibles_target','pixar/army2','pixar/bing1','pixar/bing2','pixar/cars1','pixar/food1','pixar/lamp','pixar/rat_1','pixar/rat_2','pixar/rat_3','scratchpads/colorpicker_hsb_b','scratchpads/colorpicker_hsb_s','scratchpads/colorpicker_overlay','scratchpads/colorpicker_rgb_g','scratchpads/colorpicker_select','scratchpads/cool-critter','scratchpads/error-buddy','scratchpads/happy-critter','scratchpads/jumping-critter','scratchpads/leaf-green','scratchpads/leaf-orange','scratchpads/leaf-red','scratchpads/leaf-yellow','scratchpads/speech-arrow','scratchpads/topic-drawing','scratchpads/topic-user-interaction','seasonal/father-winston','seasonal/fireworks-in-sky','seasonal/fireworks-scattered','seasonal/gingerbread-house','seasonal/gingerbread-man','seasonal/hannukah-menorah','seasonal/hopper-partying','seasonal/house-with-lights','seasonal/reindeer-with-hat','seasonal/snow-crystal1','seasonal/snow-crystal3','seasonal/snownoes','seasonal/stocking-empty','seasonal/xmas-ornament-boat','seasonal/xmas-ornaments','seasonal/xmas-scene-holly-border','seasonal/xmas-tree','space/0','space/1','space/2','space/3','space/4','space/5','space/6','space/7','space/8','space/9','space/background','space/beetleship','space/collisioncircle','space/girl1','space/girl2','space/girl3','space/girl4','space/girl5','space/healthheart','space/minus','space/octopus','space/planet','space/plus','space/rocketship','space/star','animals/birds_rainbow-lorakeets','animals/komodo-dragon','animals/snake_green-tree-boa','landscapes/beach-sunset','landscapes/beach-with-palm-trees','landscapes/fields-of-wine','landscapes/mountains-in-hawaii','food/bananas','food/cake','food/croissant','food/fruits','food/strawberries','animals/cheetah','animals/butterfly_monarch','animals/crocodiles','animals/dogs_collies','animals/horse','animals/penguins','animals/retriever','animals/spider','landscapes/beach-at-dusk','landscapes/beach','landscapes/crop-circle','landscapes/lake','landscapes/lotus-garden','landscapes/mountains-sunset','landscapes/waterfall_niagara-falls','food/broccoli','food/chocolates','food/dumplings','food/hamburger','food/mushroom','food/pasta','food/potatoes','food/sushi','seasonal/fireworks-2015','seasonal/fireworks-over-harbor','seasonal/gingerbread-family','seasonal/gingerbread-houses','seasonal/hannukah-dreidel','seasonal/hopper-elfer','seasonal/hopper-reindeer','seasonal/reindeer','seasonal/snow-crystal2','seasonal/snowy-slope-with-trees','seasonal/xmas-cookies','seasonal/xmas-ornament-on-tree','seasonal/xmas-presents','seasonal/xmas-tree-with-presents','seasonal/xmas-wreath','pixar/army1','pixar/bedspread','pixar/bopeep','pixar/floorplanes','scratchpads/colorpicker_background','scratchpads/colorpicker_submit','scratchpads/colorpicker_rgb_r','scratchpads/colorpicker_rgb_b','scratchpads/colorpicker_hsb_h','scratchpads/colorpicker_hex','scratchpads/colorpicker_indic','scratchpads/ui-icons_808080_256x240','scratchpads/topic-programming-basics','scratchpads/topic-animation','scratchpads/select','seasonal/disco-ball','misc/boxmodel','seasonal/snowman','seasonal/santa-with-bag','seasonal/penguin-with-presents','animals/boxer-getting-tan','animals/boxer-wagging-tongue','misc/tim-berners-lee-webpage','seasonal/red-nosed-winston','avatars/mystery-1','insideout/shot2_layer0blur0','insideout/shot2_layer1blur0','insideout/shot2_layer2blur0','insideout/shot2_layer4blur0','insideout/shot2_layer3blur0','pixar/rat_2','pixar/luxoball','pixar/buzz','pixar/ham'];
let expectedGetImagesCaches = 0, loadedGetImagesCaches = 0;
let instanceSource = ${JSON.stringify(filling)};
for (var i = 0; i < getImageImages.length; i++) {
let s = getImageImages[i];
if (instanceSource.includes(s)) {
expectedGetImagesCaches++;
getImage(s, function () {
loadedGetImagesCaches++;
});
}
}
processingInstance.draw = function(){/* Draw needs to contain a value at the start of the program for PJS to run it. */};
// ghost data so that programs don't break if they try to access these properties
processingInstance.KAInfiniteLoopCount = 0;
processingInstance.KAInfiniteLoopSetTimeout = function(){};
window.LoopProtector = function(){};
let runStartInterval = setInterval(function () {
if (loadedGetImagesCaches === expectedGetImagesCaches) {
with (processingInstance) {
` + filling + `
}
if (typeof draw !== 'undefined') {
processingInstance.draw = draw;
}
clearInterval(runStartInterval);
}
}, 50);
});
`.replaceAll("this.__frameRate", "__frameRate").replaceAll("this.cursor", "cursor");
}
// if they input code
if (code) {
if (typeof code === "function") {
code = code.toString();
let functionName = code.slice(code.indexOf("function") + 8, code.indexOf("(")).trim();
code += "\n" + functionName + "();"
}
options = options || {};
// create canvas
pjsEnv.canvas = options.canvas || document.createElement("canvas");
pjsEnv.canvas.id = pjsEnv.canvas.id || "pjs-canvas";
if (options.container) {
options.container.parentNode.replaceChild(pjsEnv.canvas, options.container);
} else {
document.body.appendChild(pjsEnv.canvas);
}
// create the script to run the code
pjsEnv.runScript = document.createElement("script");
pjsEnv.runScript.id = "pjs-runScript";
pjsEnv.runScript.innerHTML = generateCode(
code,
"pjsEnv.canvas",
options.width || 400,
options.height || 400
);
} else {
// get the PJS code
pjsEnv.codeElement = document.getElementById("PJS_code");
if (pjsEnv.codeElement) {
// default the canvas width
if (!pjsEnv.codeElement.dataset.width) {
pjsEnv.codeElement.dataset.width = 400;
}
// default the canvas height
if (!pjsEnv.codeElement.dataset.height) {
pjsEnv.codeElement.dataset.height = 400;
}
// create canvas
pjsEnv.canvas = document.createElement("canvas");
pjsEnv.canvas.id = "pjs-canvas";
pjsEnv.codeElement.parentNode.replaceChild(pjsEnv.canvas, pjsEnv.codeElement);
// create the script to run the code
pjsEnv.runScript = document.createElement("script");
pjsEnv.runScript.id = "pjs-runScript";
pjsEnv.runScript.innerHTML = generateCode(
pjsEnv.codeElement.innerHTML,
"pjsEnv.canvas",
pjsEnv.codeElement.dataset.width || 400,
pjsEnv.codeElement.dataset.height || 400
);
}
}
// import KA Processing.js if its not already imported
if (!document.getElementById("ka_pjs_source")) {
pjsEnv.lib = document.createElement("script");
pjsEnv.lib.id = "ka_pjs_source";
pjsEnv.lib.src = "https://cdn.jsdelivr.net/gh/Khan/processing-js@master/processing.js";
document.head.appendChild(pjsEnv.lib);
}
// once Processing.js is initialized, run the code
if (pjsEnv.runScript) {
let pjsInitTimer = 0;
pjsEnv.loadLib = setInterval(function(){
if (typeof Processing !== "undefined") {
document.body.appendChild(pjsEnv.runScript);
clearInterval(pjsEnv.loadLib);
delete pjsEnv.loadLib;
console.log("PJS Initialized");
if (options && options.callback) {
options.callback(pjsEnv);
}
} else if (pjsInitTimer % 50 === 0) {
console.log("Awaiting PJS Initialization. . .");
}
pjsInitTimer++;
}, 20);
}
return pjsEnv;
}
createPJS();