Created
December 19, 2022 10:30
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var fromX, fromY; | |
var svg = document.createElementNS ('http://www.w3.org/2000/svg',"svg"); | |
svg.setAttribute("style", "position: absolute; top:0;left:0;height: " + document.body.clientHeight + "px;width: 100%"); | |
var line = document.createElementNS('http://www.w3.org/2000/svg','line'); | |
line.setAttribute("style", "stroke-width: 4; stroke: red"); | |
svg.appendChild(line); | |
document.body.appendChild(svg); | |
document.body.addEventListener("mousedown", function (e) { | |
fromX = e.pageX; | |
fromY = e.pageY; | |
}); | |
document.body.addEventListener("mousemove", function (e) { | |
if (fromX === undefined) { | |
return; | |
} | |
line.setAttribute("x1", fromX); | |
line.setAttribute("x2", e.pageX); | |
line.setAttribute("y1", fromY); | |
line.setAttribute("y2", e.pageY); | |
console.log( | |
[fromX, fromY], " to ", [e.pageX, e.pageY], "Distance:", | |
Math.sqrt(Math.pow(fromX - e.pageX, 2) + Math.pow(fromY - e.pageY, 2)) | |
); | |
}); | |
document.body.addEventListener("mouseup", function (e) { | |
fromX = undefined; | |
fromY = undefined; | |
}); |
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