I have a program in HTML, CSS and JavaScript where one can draw a from an initial point (Mousedown event )curved line(Mousemove event) and a straight line when the mouse click is lifted up(MouseUp event).
Now my problem is finding the distance of the curve line and as well as the straight line in two different labels.
My code goes below
var canvas = document.querySelector('#paint');
var ctx = canvas.getContext('2d');
var sketch = document.querySelector('#sketch');
var sketch_style = getComputedStyle(sketch);
canvas.width = parseInt(sketch_style.getPropertyValue('width'));
canvas.height = parseInt(sketch_style.getPropertyValue('height'));
var mouse = {
x: 0,
y: 0
};
var last_mouse = {
x: 0,
y: 0
};
/* Mouse Capturing Work */
canvas.addEventListener('mousemove', function(e) {
last_mouse.x = mouse.x;
last_mouse.y = mouse.y;
mouse.x = e.pageX - this.offsetLeft;
mouse.y = e.pageY - this.offsetTop;
}, false);
/* Drawing on Paint App */
ctx.lineWidth = 5;
ctx.lineJoin = 'round';
ctx.lineCap = 'round';
ctx.strokeStyle = 'black';
canvas.addEventListener('mousedown', function(e) {
initialPoint = {
x: mouse.x,
y: mouse.y
}
canvas.addEventListener('mousemove', onPaint, false);
}, false);
canvas.addEventListener('mouseup', function() {
drawStraightLine()
canvas.removeEventListener('mousemove', onPaint, false);
}, false);
var onPaint = function() {
ctx.beginPath();
ctx.moveTo(last_mouse.x, last_mouse.y);
ctx.lineTo(mouse.x, mouse.y);
ctx.strokeStyle = "#000000";
ctx.closePath();
ctx.stroke();
};
let initialPoint
const drawStraightLine = function() {
ctx.beginPath();
ctx.moveTo(initialPoint.x, initialPoint.y);
ctx.lineTo(mouse.x, mouse.y);
ctx.strokeStyle = "#FF000077";
ctx.stroke();
}html,
body {
width: 80%;
height: 50%;
}
#sketch {
border: 10px solid gray;
height: 100%;
}<div id="sketch"><canvas id="paint"></canvas><script src="1.js"></script></div><label id="StraightLineDistance"></label><label id="CurvedLineDistance"></label>