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mergesort.html
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mergesort.html
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<!DOCTYPE html>
<html>
<head>
<title>Merge Sort Visualization</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="style.css">
<style>
body {
font-family: Arial, sans-serif;
background-color: #f4f4f4;
margin: 0;
padding: 0;
}
#buttons {
margin: 20px;
text-align: center;
}
input, button {
margin: 5px;
padding: 10px;
font-size: 16px;
border-radius: 5px;
border: 1px solid #ccc;
outline: none;
}
button {
cursor: pointer;
transition: background-color 0.3s ease;
}
button:hover {
background-color: #ddd;
}
.btn-primary {
background-color: #007bff;
color: white;
border: none;
}
.btn-primary:hover {
background-color: #0056b3;
}
.btn-danger {
background-color: #dc3545;
color: white;
border: none;
}
.btn-danger:hover {
background-color: #bd2130;
}
text {
fill: black;
font-size: 16px;
text-anchor: middle;
z-index: 3;
}
rect {
fill: white;
stroke: #a5a5a5;
stroke-width: 2px;
z-index: 2;
}
.unsorted {
fill: #e4e4e4;
}
.sorted {
fill: #0adf1c;
}
.comparing {
fill: #ffcc00;
}
.header {
background-color: #333;
color: white;
padding: 20px 0;
text-align: center;
position: relative; /* Ensure z-index works */
}
.header a {
color: white;
padding: 21px 15px;
text-decoration: none;
font-size: 18px;
transition: background-color 0.3s ease; /* Smooth transition */
}
.header a:hover {
background-color: #ddd;
color: black; /* Adjust text color on hover */
}
.sh {
display: flex;
justify-content: center;
align-items: center;
height: 500px;
}
#heading {
text-align: center;
margin-top: 20px;
color: #333;
font-size: 36px;
font-weight: bold;
}
</style>
<script src="https://d3js.org/d3.v4.min.js"></script>
</head>
<body>
<div id="Loader"></div>
<div class="header">
<a href="index.html">Home</a>
<a href="Bubble.html">Bubble Sort</a>
<a href="Insertion.html">Insertion Sort</a>
<a href="selectionsort.html">Selection Sort</a>
<a href="mergesort.html">Merge Sort</a>
</div>
<div id="contain">
<h2 id="heading">MERGE SORT</h2>
<div class="sh"></div>
<div id="buttons">
<input id="array" type="text" placeholder="Enter array separated by space" size="30">
<button id="submit" class="btn-primary" onclick="submit()">Submit</button>
<button class="btn-default" onclick="mergeSort()">Merge Sort</button>
<button class="btn-default" onclick="stop = true" style="margin-left:40px">Stop</button>
<button class="btn-default" onclick="stop = false; mergeSort()">Resume</button>
<button class="btn-default" onclick="reset()">Reset</button>
<button class="btn-default btn-danger" onClick="window.location.reload();">Clear</button>
</div>
</div>
<script>
var durationTime = 1000,
array = [],
unsortedArray = [],
stop = false;
var margin = {top: 40, right: 40, bottom: 180, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x = d3.scaleBand().range([0, width]).padding(0.1);
var y = d3.scaleLinear().range([height, 0]);
var svg = d3.select('.sh').append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
function submit() {
document.getElementById("submit").disabled = true;
var array2 = document.getElementById("array").value.split(" ").map(function(item) {
return parseInt(item, 10); // Convert into decimal
});
array = array2;
unsortedArray = [...array];
x.domain(array.map(function(d, i) { return i; }));
y.domain([0, d3.max(array, function(d) { return d; })]);
svg.selectAll(".bar")
.data(unsortedArray)
.enter().append("rect")
.attr("class", "bar unsorted")
.attr("x", function(d, i) { return x(i); })
.attr("width", x.bandwidth())
.attr("y", function(d) { return y(d); })
.attr("height", function(d) { return height - y(d); });
svg.selectAll("text")
.data(unsortedArray)
.enter().append("text")
.attr("x", function(d, i) { return x(i) + x.bandwidth() / 2; })
.attr("y", function(d) { return y(d) - 5; })
.attr("text-anchor", "middle")
.text(function(d) { return d; });
}
function reset() {
unsortedArray = [...array];
stop = false;
svg.selectAll(".bar")
.data(unsortedArray)
.attr("x", function(d, i) { return x(i); })
.attr("y", function(d) { return y(d); })
.attr("height", function(d) { return height - y(d); })
.attr("class", "bar unsorted");
svg.selectAll("text")
.data(unsortedArray)
.attr("x", function(d, i) { return x(i) + x.bandwidth() / 2; })
.attr("y", function(d) { return y(d) - 5; })
.text(function(d) { return d; });
}
async function mergeSort() {
await mergeSortHelper(unsortedArray, 0, unsortedArray.length - 1);
svg.selectAll(".bar")
.attr("class", "bar sorted");
}
async function mergeSortHelper(arr, left, right) {
if (left < right) {
var mid = Math.floor((left + right) / 2);
await mergeSortHelper(arr, left, mid);
await mergeSortHelper(arr, mid + 1, right);
await merge(arr, left, mid, right);
}
}
async function merge(arr, left, mid, right) {
var n1 = mid - left + 1;
var n2 = right - mid;
var L = new Array(n1);
var R = new Array(n2);
for (var i = 0; i < n1; i++)
L[i] = arr[left + i];
for (var j = 0; j < n2; j++)
R[j] = arr[mid + 1 + j];
var i = 0;
var j = 0;
var k = left;
while (i < n1 && j < n2) {
await highlightBars(k, k+i, k+j);
if (L[i] <= R[j]) {
arr[k] = L[i];
i++;
} else {
arr[k] = R[j];
j++;
}
k++;
await updateBars(arr);
}
while (i < n1) {
arr[k] = L[i];
i++;
k++;
await updateBars(arr);
}
while (j < n2) {
arr[k] = R[j];
j++;
k++;
await updateBars(arr);
}
}
async function updateBars(arr) {
svg.selectAll(".bar")
.data(arr)
.transition()
.duration(durationTime)
.attr("x", function(d, i) { return x(i); })
.attr("y", function(d) { return y(d); })
.attr("height", function(d) { return height - y(d); });
svg.selectAll("text")
.data(arr)
.transition()
.duration(durationTime)
.attr("x", function(d, i) { return x(i) + x.bandwidth() / 2; })
.attr("y", function(d) { return y(d) - 5; })
.tween("text", function(d) {
var that = d3.select(this),
i = d3.interpolateNumber(that.text(), d);
return function(t) {
that.text(Math.round(i(t)));
};
});
await new Promise(resolve => setTimeout(resolve, durationTime));
if (stop) {
await new Promise(resolve => {
var interval = setInterval(() => {
if (!stop) {
clearInterval(interval);
resolve();
}
}, 100);
});
}
}
async function highlightBars(k, i, j) {
svg.selectAll(".bar")
.filter((d, idx) => idx === i || idx === j)
.classed("comparing", true);
await new Promise(resolve => setTimeout(resolve, durationTime / 2));
svg.selectAll(".bar")
.filter((d, idx) => idx === i || idx === j)
.classed("comparing", false);
}
</script>
<script>
var loader = document.getElementById("Loader");
window.addEventListener("load", function(){
loader.style.display = "none";
})
</script>
</body>
</html>