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exploding javascripts
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rect.snake { | |
fill: #555353; | |
} | |
rect.food { | |
fill: #45720B; | |
} | |
svg { | |
height: 100%; | |
width: 100%; | |
background-color: #222; | |
} | |
div#container { | |
height: 100%; | |
width: 100%; | |
border: 4px solid gray; | |
} |
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$(document).ready(function() { | |
function randomchoice(arr) { | |
return arr[Math.floor(Math.random() * arr.length)]; | |
} | |
var width = $('svg')[0].getBoundingClientRect().width; | |
var height = $('svg')[0].getBoundingClientRect().height; | |
var max_id = 1; | |
var current_text = null; | |
var last_keypress_time = Date.now(); | |
var all_effects = ['rotate', ['contract', 'expand'], 'fly'] | |
var texts = [{ | |
id: 1, | |
text: "Start typing!", | |
x: width/2, | |
y: height/2, | |
fontsize: 30, | |
rotation: 0, | |
effects: ['fly', 'rotate'], | |
deltax: 2, | |
deltay: 2, | |
color: 'darkorange', | |
start_time: Date.now() + 10000 | |
}]; | |
var colors = ['#1f77b4', '#ff7f0e', '#2ca02c', '#d62728'] // d3.scale.category10().range(); | |
function get_random_effects() { | |
var effects = []; | |
for (var i = 0; i < all_effects.length; i++) { | |
if (Math.random() < 0.5) { | |
var effect = all_effects[i]; | |
if ($.isArray(effect)) { | |
effects.push(randomchoice(effect)); | |
} else { | |
effects.push(effect) | |
} | |
} | |
} | |
if (effects.length > 0 && !(effects.length == 1 && effects[0] == 'rotate')) { | |
return effects; | |
} else { | |
return get_random_effects(); | |
} | |
} | |
function new_text() { | |
max_id++; | |
// Choose random effects | |
var effects = get_random_effects(); | |
var text = { | |
id: max_id, | |
text: "", | |
x: Math.floor(Math.random() * width), | |
y: Math.floor(Math.random() * height), | |
fontsize: Math.floor(Math.random() * 10) + 20, | |
rotation: 0, | |
effects: effects, | |
color: randomchoice(colors), | |
start_time: Date.now() | |
} | |
texts.push(text); | |
return text; | |
} | |
var interval_id = setInterval(tick, 50) | |
// setTimeout(function() {for(i = 0; i<10000; ++i) clearInterval(i)}, 3000000) | |
function draw_texts() { | |
var selection = d3.select('svg') | |
.selectAll('text.explosion') | |
.data(texts, function(d) {return d.id}); | |
selection.enter() | |
.append('text') | |
.attr('class', 'explosion') | |
.attr('x', function(d) {return d.x}) | |
.attr('y', function(d) {return d.y}) | |
.style('text-anchor', 'middle') | |
.attr('fill', function(d) {return d.color}) | |
.style('font-size', function(d) {return d.fontsize + 'px'} ) | |
.attr('transform', function(d) {return 'rotate(' + d.rotation + ' ' + d.x + ' ' + d.y + ')'} ) | |
.text(function(d) {return d.text}); | |
selection | |
.attr('x', function(d) {return d.x}) | |
.attr('y', function(d) {return d.y}) | |
.style('font-size', function(d) {return d.fontsize + 'px'} ) | |
.attr('transform', function(d) {return 'rotate(' + d.rotation + ' ' + d.x + ' ' + d.y + ')'} ) | |
.text(function(d) {return d.text}); | |
// .attr('transform', function(d) {return "scale(" + d.scale + ")"}); | |
selection.exit() | |
.transition() | |
.duration(500) | |
.attr('opacity', 0) | |
.remove(); | |
} | |
function tick() { | |
draw_texts(); | |
var text_to_remove = null; | |
for (var i = 0; i < texts.length; ++i) { | |
var text = texts[i]; | |
if (text_to_remove === null && (Date.now() - text.start_time > 5000)) { | |
text_to_remove = i; | |
} | |
if (text['effects'].indexOf('expand') != -1) { | |
text['fontsize'] *= 1.1; | |
} | |
if (text['effects'].indexOf('rotate') != -1) { | |
text['rotation'] += 6; | |
} | |
if (text['effects'].indexOf('contract') != -1) { | |
text['fontsize'] *= 0.95; | |
} | |
if (text['effects'].indexOf('fly') != -1) { | |
text.deltax = text.deltax || (randomchoice([1,-1]) * 2); | |
text.deltay = text.deltay || (randomchoice([1,-1]) * 2); | |
text['x'] += text.deltax; | |
text['y'] += text.deltay; | |
} | |
} | |
if (text_to_remove !== null) { | |
texts.splice(text_to_remove, 1); | |
} | |
} | |
d3.select(window) | |
.on("keydown", function(event) { | |
var keycode = d3.event.keyCode; | |
var letter = String.fromCharCode(keycode); | |
if((keycode >= 65 && keycode <= 90) || letter === ' ') { | |
if (current_text === null || Date.now() - last_keypress_time > 500) { | |
current_text = new_text(); | |
} | |
current_text.text += letter; | |
last_keypress_time = Date.now(); | |
} | |
}); | |
}) |
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<html> | |
<head> | |
<title> it's a snake! </title> | |
<link rel="stylesheet" href="exploding.css"> </link> | |
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"> </script> | |
<script src="exploding.js"> </script> | |
</head> | |
<body> | |
<div id="container"> | |
<svg width="100%" height="100%"/> | |
</div> | |
</body> | |
</html> |
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