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<!DOCTYPE html>
<html>
<head>
<!-- META -->
<title>p5.turtle.js - Example of turtle graphics for p5.js</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<meta name="description" content="turtle graphics for p5.js" />
<!-- CSS -->
<link rel="stylesheet" type="text/css" href="css/kickstart.css" media="all" />
<link rel="stylesheet" type="text/css" href="style.css" media="all" />
<!-- Javascript -->
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript" src="js/kickstart.js"></script>
</head>
<body>
<nav class="navbar">
<a class="hide-phone" id="logo" href="http://www.catch.jp/"><i class="fa fa-hand-o-right"></i> <span>catch.jp</span></a>
<ul>
<li><a href="https://github.com/ycatch"><span>ycatch - Github</span></a></li>
<li>[English]</li>
<li><a href="index.ja.html">日本語</a></li>
</ul>
</nav>
<div class="grid">
<div class="col_6" style="margin-top:100px;">
<h1><img src="images/turtle_2.png" width="54" hight="63"> p5.turtle.js</h1>
<h4 style="color:#999;">Example of turtle graphics for p5.js</h4>
<p>This is very simple and animated turtle graphics program. There are two step in the process. 1st step, it record turtle moving in setup(). 2nd step, it playback turtle moving for animation in draw(). This program needs p5.js and p5.play.js library.</p>
<p><a href='https://github.com/ycatch/p5.turtle.js/archive/master.zip' target='_blank'>
<button class="large red"><i class="fa fa-download"></i> Download ZIP</button>
</a></p>
<p><a href='https://github.com/ycatch/p5.turtle.js/blob/master/p5.turtle.js' target='_blank'>View Source</a></p>
</div>
<div class="col_4" style="margin-top:100px;">
<div id = "p5Canvas"></div>
</div>
<div class="col_12">
<pre id="code_0" hidden>
var turtles_path = []; // array of Turtle objects
var pathPointer = 0;
var turtle;
var turtleSprite;
var tPlane; // graphic plane for pen layer
setup = function() {
var canvas = createCanvas(480, 360);
canvas.parent("p5Canvas");
background(200);
turtleSprite = createSprite(0, 0, 56, 64);
turtleSprite.addAnimation("moving", "images/turtle_1.png", "images/turtle_4.png");
turtleSprite.changeAnimation("moving");
tPlane = createGraphics(width, height); // pen layer
// Start turtle code - recode turtle moving. -------------------------------------
</pre>
<p></p>
<h4>Edit</h4>
<textarea name="code_1" rows=30 cols=120>
turtle = new Turtle();
turtle.x = 200;
turtle.y = 180;
turtle.penColor = turtle.color.blue;
for(var i = 0; i < 18; i++){
for(var j = 0; j < 360; j++){
turtle.penDown = true;
turtle.forward(1);
turtle.right(1);
};
turtle.penDown = false;
turtle.forward(10);
turtle.left(20);
};
turtle.right(360);
turtle.right(360);
</textarea>
<p></p>
<input type="button" onclick="restart()" value="Re-Start">
<p><a href='https://github.com/ycatch/p5.turtle.js/blob/master/README.md' target='_blank'>Help</a></p>
<pre id="code_2" hidden>
// End of turtle code ------------------------------------------------------------
};
draw = function() {
// Playback turtle moving for animation.
background(200);
turtle.draw(pathPointer);
image(tPlane);
drawSprites();
pathPointer += 1;
if (pathPointer >= turtles_path.length) {
pathPointer = 0;
clear();
}
};
/** utility */
function clear() {
background(200);
tPlane.fill(200);
tPlane.noStroke();
tPlane.rect(0, 0, width, height);
}
/** Turtle Data */
function TBody() {
this.x = 200;
this.y = 60;
this.step = 3;
this.stepAngle = Math.PI / 36;
this.angleInRadians = 0;
this.penDown = false;
this.penColor = "#000000";
this.lineWidth = 2;
};
/** Turtle class */
function Turtle() {
var body = new TBody();
for (var prop in body) {
this[prop] = body[prop];
}
this.color = {
black : "#000000",
gray: "#808080",
lightgray: "#C0C0C0",
red: "#ff0000",
green: "#00ff00",
blue: "#0000ff",
yellow: "#ffff00",
magenta: "#ff00ff",
aqua: "#00ffff",
white: "#ffffff"
};
this.forward = function(length) {
var x0 = this.x;
var y0 = this.y;
var xx = sin(this.angleInRadians);
var yy = cos(this.angleInRadians);
var count = abs(int(length / this.step));
var dir = 1;
if(length < 0) {dir = -1};
for(var i=0; i < count - 1; i++) {
this.x += dir * this.step * xx;
this.y += dir * this.step * yy;
this.copy();
}
this.x = x0 + length * xx;
this.y = y0 + length * yy;
this.copy();
};
this.back = function(length) {
this.forward(-length);
};
this.left = function(angleInDegrees) {
var angle0 = this.angleInRadians;
var targetAngle = angleInDegrees * Math.PI / 180.0;
var count = abs(int(targetAngle / this.stepAngle));
var dir = 1;
if(targetAngle < 0) {dir = -1};
for(var i=0; i < count - 1; i++) {
this.angleInRadians += dir * this.stepAngle;
this.copy();
}
this.angleInRadians = angle0 + targetAngle;
this.copy();
};
this.right = function(angleInDegrees) {
this.left(-angleInDegrees);
};
// copy TBody object
this.copy = function() {
turtles_path.push(new TBody());
var target = turtles_path[turtles_path.length - 1];
for (var prop in this) {
target[prop] = this[prop];
}
};
// drawing turtle in loop
this.draw = function(pointer) {
var target = turtles_path[pointer];
// draw path by Pen
if (target.penDown) {
tPlane.strokeWeight(target.lineWidth);
tPlane.stroke(target.penColor);
var nextPointer = pointer + 1;
if(nextPointer >= turtles_path.length) {
nextPointer = 0;
}
tPlane.line(target.x, target.y, turtles_path[nextPointer].x, turtles_path[nextPointer].y);
}
// draw turtle image by sprite
turtleSprite.rotation = target.angleInRadians * -180 / Math.PI + 180;
turtleSprite.position.x = target.x;
turtleSprite.position.y = target.y;
};
};
</pre>
</div>
<div class="col_12">
<h2>Get Started</h2>
<h3>1.Download</h3>
<p>Download and Unzip this.</p>
<ul>
<li>p5.turtle.js - <a href='https://github.com/ycatch/p5.turtle.js/archive/master.zip' target='_blank'>download</a></li>
</ul>
<h3>2.HTML</h3>
<p>make html in the downloads and put this element in html</p>
<!-- Code HTML -->
<pre><div id = "p5Canvas"></div></pre>
<h3>3.Javascript</h3>
<p>put this library in html</p>
<!-- Code Javascript -->
<pre>
<script src="js/p5.min.js"></script>
<script src="js/p5.play_patch119.js"></script>
<script src="p5.turtle.js"></script></pre>
<h3>4.Edit turtle code</h3>
<p>Edit your own turtle code in p5.turtle.js</p>
<!-- Code Javascript -->
<pre>
// Start turtle code - recode turtle moving. -------------------------------------
turtle = new Turtle();
turtle.x = 140;
turtle.y = 80;
turtle.penDown = true;
turtle.penColor = turtle.color.blue;
for(var i = 0; i < 4; i++){
turtle.forward(200);
turtle.left(90);
};
turtle.right(360);
turtle.right(360);
// End of turtle code ------------------------------------------------------------</pre>
<h2>Example</h2>
<ul>
<li><a href='example/basic/index.html'>Basic</a></li>
<li><a href='example/instance_w_play/index.html'>Instance mode and draw with turtle</a></li>
<li><a href='example/instance_mode/index-is-animation.html'>Instance mode and draw with animation</a></li>
<li><a href='example/instance_mode/index-is-sandbox.html'>Instance mode sandbox with animation</a></li>
<li><a href='example/instance_mode/index.html'>Instance mode and draw without animation</a></li>
</ul>
</div>
<div class="col_12">
<h2>Links</h2>
<ul>
<li><a href='http://p5js.org/' target='_blank'>p5.js</a></li>
<li><a href='http://p5play.molleindustria.org/' target='_blank'>p5.play.js</a></li>
<li><a href='https://github.com/ycatch/p5.turtle.js' target='_blank'>Github - p5.turtle.js</a></li>
</ul>
</div>
<div class="col_12" id="footer">
Copyright 2015 Yutaka Kachi released under MIT License.
</div>
</div> <!-- End Grid -->
<script src="js/p5.js"></script>
<script src="js/p5.play_patch119.js"></script>
<!-- <script src="p5.turtle.js"></script> -->
<script>
var Pjs;
run()
function restart() {
location.reload();
}
function run(){
//console.log("Run");
var code_1 = document.getElementById('code_0').textContent;
var code_2 = document.getElementsByName('code_1')[0].value;
var code_3 = document.getElementById('code_2').textContent;
var s = new Function(code_1 + code_2 + code_3);
Pjs = new p5(s);
}
</script>
</body>
</html>