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Sorting_Algo.html
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<!DOCTYPE html><html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width" />
<title>sorting algorithms</title>
<link rel="stylesheet" href="style.css" />
<style>
#algoritm{
position: absolute;
left: 120px;
top: 450px;
}
#reset{
position: absolute;
left: 50px;
top: 450px;
}
#speed{
position: absolute;
left: 120px;
top: 485px;
}
#elements{
position: absolute;
left: 120px;
top: 520px;
}
#speedText{
position: absolute;
left: 120px;
top: 485px;
}
#elementsText{
position: absolute;
left: 120px;
top: 520px;
}
</style>
</head>
<body>
<h1>sorting algorithms</h1>
<canvas id="c"></canvas>
<select id="algoritm" onChange="reset(this.value, -1)">
<option value="0">BubbleSort</option>
<option value="1">MergeSort</option>
<option value="2">InsertionSort</option>
<option value="3">SelectionSort</option>
<option value="4">QuickSort</option>
<option value="5">RadixSort</option>
<option value="6">BogoSort</option>
</select>
<input id="speed" type="range" min="1" max="30" step="1" value="10"/>
<input id="elements" type="range" min="1.5" max="10" step="0.25" value="2.5" onChange="reset(-1, this.value)" />
<button id="reset" onClick="reset(-1, -1)">reset</button>
<p id="speedText">speed: 10 iterations/frame</p>
<p id="elementsText">elements: 10</p>
<script src="script.js"></script>
<script>
var can;
var c;
var arr;
var algoritm;
var frameCount;
var speed;
var elements; //for mergeSort(drawing)
var atElement; //for insertionSort
var callWith; //for quickSort
var callWith_;
var buckets; //for radixSort
var longest;
window.onload = function(){
can = document.getElementById("c");
can.width = can.height = 360;
c = can.getContext("2d");
reset(0, 2.5);
speed = document.getElementById("speed").value;
animate();
}
function reset(algo, length){
c.fillStyle = "#000000";
c.fillRect(0,0,can.width,can.height);
frameCount = 1;
if(length != -1){
elements = parseInt(length*length*length*length); //makes it seem more "natural"
document.getElementById("elementsText").innerHTML = "elements: " + elements;
}
arr = [];
for(var i=0;i<elements;i++){
arr.push(new Number(parseInt(Math.random()*can.height)));
}
if(algo == 0){
algoritm = "bubbleSort";
}else if(algo == 1){
algoritm = "mergeSort";
}else if(algo == 2){
algoritm = "insertionSort";
}else if(algo == 3){
algoritm = "selectionSort";
}else if(algo == 4){
algoritm = "quickSort";
}else if(algo == 5){
algoritm = "radixSort";
}else if(algo == 6){
algoritm = "bogoSort";
}else{
}
/*
insertionSort
mergeSort
bubbleSort
selectionSort
quickSort
radixSort
bogoSort
*/
//for mergeSort
if(algoritm == "mergeSort"){
for(var i=0;i<arr.length;i++){
arr[i] = [arr[i]];
}
}
//for insertionSort or radixSort
atElement = 0;
//for quickSort
callWith = [[0, arr.length]];
callWith_ = [];
//for radixSort
buckets = [];
var bucket = [];
for(var i=0;i<10;i++){
bucket = [];
buckets.push(bucket);
}
longest = 1;
for(var i=0;i<arr.length;i++){
if(arr[i].val > longest){
longest = ("" + arr[i].val).length + 1;
}
}
}
function animate(){
speed = document.getElementById("speed").value;
document.getElementById("speedText").innerHTML = "speed: 1/" + speed + " iteration/frame";
c.fillStyle = "#000000";
c.fillRect(0,0,can.width,can.height);
var drawAt = 0;
for(var i=0;i<arr.length;i++){
if(algoritm == "mergeSort"){
for(var j=0;j<arr[i].length;j++){
arr[i][j].show(drawAt);
drawAt++;
}
}else{
arr[i].show(i);
}
}
if(frameCount % speed == 0){
if(algoritm == "bubbleSort"){
for(var i=0;i<arr.length-1;i++){
if(arr[i].val > arr[i+1].val){
var holder = arr[i];
arr[i] = arr[i+1];
arr[i+1] = holder;
}
}
}else if(algoritm == "insertionSort"){
if(atElement >= elements){
atElement = elements-1;
}
var at = atElement;
while(needToSwap(at-1, at)){
var holder = arr[at];
arr[at] = arr[at-1];
arr[at-1] = holder;
at--;
}
atElement++;
}else if(algoritm == "mergeSort"){
var arr_ = [];
if(arr.length > 1){
for(var i=0;i<arr.length;i+=2){
if(i != arr.length-1){
arr_.push(merge(arr[i], arr[i+1]));
}else{
arr_[arr_.length-1] = merge(arr_[arr_.length-1], arr[i]);
}
}
arr = arr_;
}
}else if(algoritm == "selectionSort"){
if(atElement >= elements){
atElement = elements-1;
}
var at = findSmallestUpwards(atElement);
var holder = arr[at];
arr[at] = arr[atElement];
arr[atElement] = holder;
atElement++;
}else if(algoritm == "quickSort"){
for(var i=0;i<callWith.length;i++){
sortQuick(callWith[i][0], callWith[i][1]);
}
callWith = callWith_;
callWith_ = [];
}else if(algoritm == "radixSort"){
if(atElement <= longest){
for(var i=0;i<arr.length;i++){
buckets[getDigitValue(atElement, arr[i].val, longest)].push(arr[i]);
}
var at = 0;
for(var i=0;i<buckets.length;i++){
for(var j=0;j<buckets[i].length;j++){
arr[at] = buckets[i][j];
at++;
}
buckets[i] = [];
}
}
atElement++;
}else if(algoritm == "bogoSort"){
if(!isSorted()){
randomConfiguration();
}
//console.log(arr);
}
}
frameCount++;
requestAnimationFrame(animate);
}
//for selectionSort
function findSmallestUpwards(x){
var index = x;
for(var i=x;i<arr.length;i++){
if(arr[i].val < arr[index].val){
index = i;
}
}
return index;
}
//for insertionSort
function needToSwap(at1, at2){
if(at1 >= 0 && at2 >= 0){
return (arr[at1].val > arr[at2].val);
}else{
return false;
}
}
//for mergeSort
function merge(arr1, arr2){
var result = [];
var index1 = 0;
var index2 = 0;
if(arr1[arr1.length-1].val > arr2[arr2.length-1].val){
while(index2 < arr2.length){
if(arr2[index2].val > arr1[index1].val){
result.push(arr1[index1]);
index1++;
}else{
result.push(arr2[index2]);
index2++;
}
}
while(index1 < arr1.length){
result.push(arr1[index1]);
index1++;
}
}else{
while(index1 < arr1.length){
if(arr1[index1].val > arr2[index2].val){
result.push(arr2[index2]);
index2++;
}else{
result.push(arr1[index1]);
index1++;
}
}
while(index2 < arr2.length){
result.push(arr2[index2]);
index2++;
}
}
return result;
}
//for quickSort (so you can show step by step)
function sortQuick(index1, index2){
if(index2 - index1 > 1){
var pivotIndex = index1;
for(var i=index1+1;i<index2;i++){
if(arr[pivotIndex].val >= arr[i].val){
var holder = arr[i];
for(var j=i;j>pivotIndex;j--){
arr[j] = arr[j-1];
}
arr[pivotIndex] = holder;
pivotIndex++;
}
}
callWith_.push([index1, pivotIndex]);
callWith_.push([pivotIndex+1, index2]);
}
}
//for radixSort
function getDigitValue(digit, val, l){
var value = parseInt(val);
for(var i=0;i<l;i++){
if(i == digit){
return parseInt(value%10);
}
value = parseInt(value/10);
}
return 0;
}
//for bogoSort
function isSorted(){
for(var i=0;i<arr.length-1;i++){
if(arr[i].val > arr[i+1].val){
return false;
}
}
return true;
}
function randomConfiguration(){
for(var i=0;i<arr.length;i++){
var holder = arr[i];
var index = parseInt(Math.random() * (arr.length-1));
arr[i] = arr[index];
arr[index] = holder;
}
}
function Number(val){
this.val = val;
this.show = function(x){
c.fillStyle = "hsl(" + this.val + ", 100%, 50%)";
c.fillRect(x*360/elements,360-this.val,parseInt(360/elements+1),this.val);
}
}
</script>
</body>
</html>