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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<link href='app.css' rel='stylesheet' type='text/css'>
<script src="vendor/core.min.js" type="text/javascript" charset="utf-8"></script>
<script src="vendor/shortcut.js" type="text/javascript" charset="utf-8"></script>
<script src="helpers.js" type="text/javascript" charset="utf-8"></script>
<title>TurtleJS</title>
</head>
<body>
<div id="__toolbar">
<span class="title">TurtleJS 0.1.0</span>
<a id='githubLink' href="https://github.com/sequentialread/TurtleJS">Github</a>
<span class="green button" id="__runButton">Run</span>
<span class="blue button" id="__helpButton">Help</span>
</div>
<pre id="__editor">
</pre>
<svg id="__stage" viewbox="-250 -250 500 500">
</svg>
<div id="__consoleBar">
</div>
<div id="__console" style="display:none">
<span>Console</span>
<span class="blue button" id="__closeConsoleButton">Close</span>
<span class="blue button" id="__clearLogsButton">Clear</span>
<div id="__consoleContainer" style="margin-top:30px;">
</div>
</div>
<div id="__loadingScreen" style="display:none">
<span class="title">Running your code...</span>
</div>
<div id="__mdnIframeContainer" style="display:none">
<div class="flexbox-container">
<div class="flexbox-row">
<span class="title-small" id="__mdnIframeTitle"></span>
<span class="blue button" id="__closeMdnButton">Close</span>
<hr/>
<button id="__mdnIframeBackButton" disabled="true"><</button>
<input type="text" id="__mdnIframeUrlBar" value="" readonly>
</div>
<iframe id="__mdnIframe"></iframe>
</div>
</div>
<div id="__helpContainer" style="display:none">
<span class="title" style="position: relative; bottom: 15px;">Quick Help</span>
<span id="__hotkeyHelp" style="position:relative; left:4%; display: inline-block;">
</span>
<span class="blue button" id="__closeHelpButton">Close</span>
<hr/>
<div class="container">
<pre id="__helpContent1" class="helpContent">
// this is a comment. not code.
// here's how to move the turtle:
forward(50);
right(90);
left(90);
// reset the position and rotation
// of the turtle:
home();
// tell it when to draw and when not to draw:
penUp();
forward(50);
penDown();
// change the color of the line:
// (using a CSS3 color definition)
pushColor('red');
pushColor('rgba(255,0,0,0.5)');
pushColor('#BEEEEF');
pushColor('none');
// reset the color to what it was before:
popColor();
// change the fill color of the shape:
// (using a CSS3 color definition)
pushFillColor('gray');
...
popFillColor();
// change the width of the line:
// (in pixels)
pushWidth(2);
...
popWidth();
// change the opacity of the shape/line:
// (from zero to one)
pushOpacity(0.5);
...
popOpacity();
// position the shape/line over or under:
pushLayer(5);
...
popLayer();
</pre>
<pre id="__helpContent2" class="helpContent">
// define a variable:
var distance = 50;
// use a variable:
forward(distance);
// define a function:
function moveForward50 () {
forward(50);
}
// call a function:
moveForward50();
// display something for debugging:
console.log(distance);
// make a decision:
if(distance > 30) {
console.log('distance is '
+ 'greater than 30');
} else {
console.log('distance is '
+ 'less than or equal to 30');
}
// functions can have parameters:
function moveAndTurn (dist, rot) {
forward(dist);
right(rot);
}
moveForwardAndTurn(50, 90);
//loop over the same code n times
var n = 5;
while(n > 0) {
n = n - 1;
console.log('memememememememe');
}
// this infinite loop will crash:
var n = 5;
while(n > 0) {
console.lag('memememememememe');
}
// this is a shortcut for loops.
// it's harder to cause an infinite loop
// this way. it uses the form:
// for(initializer; condition; incrementer)
for(var i = 0; i < 4; i++) {
forward(50);
right(90);
}
// this is a recursive function.
// it calls itself, which calls itself again.
// also capable of crashing if done wrong.
function abacabadabacaba (letters, depth) {
// if not provided with a depth argument,
// default to zero.
if(depth === undefined) depth = 0;
var newDepth = depth+1;
var letter =
letters[letters.length-newDepth];
if(newDepth == letters.length) {
// we are at our last step,
// so don't recurse any more.
return letter;
} else {
// we need to go deeper
var eitherSide =
abacabadabacaba(letters, newDepth);
return eitherSide + letter + eitherSide;
}
}
// to log 'abacabadabacaba':
console.log(abacabadabacaba(
['a', 'b', 'c', 'd']
));
//guess what this will do?
console.log(abacabadabacaba(
['a', 'b', 'c', 'd', 'f']
));
</pre>
<pre id="__helpContent3" class="helpContent">
// this is a string of characters
var greeting = 'Hello World!';
// HELLO WORLD!
var entusiasticGreeting =
greeting.toUpperCase();
// these are number
var coolnessAmount = -5;
var pi = 3.14;
// to increase your coolness,
// you can assign it a new value
coolnessAmount = (coolnessAmount + 3);
// this is a shortcut for the same statement
coolnessAmount += 3;
// testing whether things are equal is
// different from assigning a value.
// the following will run, but it will
// assign 3 instead of testing for 3
if(coolnessAmount = 3) {
...
}
//you really want:
if(coolnessAmount == 3) {
}
// this is an Array
var shoppingList = [
'apples',
'oranges',
'bananas'
];
var emptyList = [];
var otherEmptyList = new Array();
// this is an object:
var sonic = {
speed: Infinity,
rings: 1,
increaseSpeed: function(amount) {
this.speed += amount;
}
};
//you can get and set most object properties.
sonic.rings = 4;
console.log('sonic is going '
+ sonic.speed + ' miles per hour with '
+ sonic.rings + ' rings');
//even functions can be treated like values.
//and the functions 'remember' the state of
//outside variables when they were created.
//this is one of javascript's core features.
var speedMultiplier = 5;
sonic.increaseSpeed = function (amount) {
this.speed += amount * speedMultiplier;
}
</pre>
</div>
</div>
<script src="vendor/ace/ace.js" type="text/javascript" charset="utf-8"></script>
<script src="app.js" type="text/javascript" charset="utf-8"></script>
<script src="mdnSearch.js" type="text/javascript" charset="utf-8"></script>
<script src="ui.js" type="text/javascript" charset="utf-8"></script>
</body>
</html>