Slow Delaunay triangulation

Developer
Darby Rathbone
Size
3,316 Kb
Views
30,360
  1. Slow Delaunay triangulation Previews
  2. Slow Delaunay triangulation HTML Codes
  3. Slow Delaunay triangulation CSS Codes
  4. Slow Delaunay triangulation JS Codes

How do I make an slow delaunay triangulation?

What is a slow delaunay triangulation? How do you make a slow delaunay triangulation? This script and codes were developed by Darby Rathbone on 03 October 2022, Monday.

Slow Delaunay triangulation Previews
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Slow Delaunay triangulation - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>slow Delaunay triangulation</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <canvas></canvas> <script src="js/index.js"></script>
</body>
</html>

Slow Delaunay triangulation - Script Codes CSS Codes

* { margin:0px; padding:0px;
}
html, body { height:100%; overflow:hidden;
}
canvas { width:100%; height:100%; outline:black 1px solid;
}

Slow Delaunay triangulation - Script Codes JS Codes

var rect = function (e, t) { var n = document.createElement("canvas"); n.c = n.getContext("2d"); n.width = canvas.width; n.height = canvas.height; return function (r) { n.c.clearRect(0, 0, n.width, n.height); n.c.strokeRect(t.x * 2, t.y * 2, r.x * 2 - t.x * 2, r.y * 2 - t.y * 2); e(); ctx.drawImage(n, 0, 0); return rect }
}, line = function (e, t) { var n = document.createElement("canvas"); n.c = n.getContext("2d"); n.width = canvas.width; n.height = canvas.height; return function (t) { n.c.clearRect(0, 0, n.width, n.height); e(); ctx.drawImage(n, 0, 0); return line }
}, bufferd = document.createElement("canvas");
bufferd.width = screen.width * 2;
bufferd.height = screen.height * 2;
var buffer = function () { t = bufferd.getContext("2d"); t.drawImage(ctx.canvas, 0, 0); var n = function () { ctx.clearRect(0, 0, bufferd.width, bufferd.height); ctx.drawImage(bufferd, 0, 0) }; return n
}, resizeFunction = function (e) { var t = buffer(); canvas.width = parseFloat(getComputedStyle(canvas).width) * 2; canvas.height = parseFloat(getComputedStyle(canvas).height) * 2; if (e) { t() }
}, mousemovefunction = function (e) { //currentfunction(newPoint(e.x, e.y))
}, mouseupfunction = function (e) { // currentfunction = currentfunction(newPoint(e.x, e.y)); // points.push(newPoint(e.x * 2, e.y * 2)); // drawpoints(); // delaunay(); window.removeEventListener("mousemove", mousemovefunction); window.removeEventListener("mouseup", mouseupfunction)
}, mousedownfunction = function (e) { var t = buffer(), _point = newPoint(e.x * 2, e.y * 2); if (!points.some(function (b) { var d = Math.sqrt((b.x - _point.x) * (b.x - _point.x) + (b.y - _point.y) * (b.y - _point.y)); return d < 10; })) { points.push(_point); // currentfunction = currentfunction(t, newPoint(e.x, e.y)); drawpoints(); delaunay(); window.addEventListener("mousemove", mousemovefunction); window.addEventListener("mouseup", mouseupfunction) }
},
points = [];
window.addEventListener("mousedown", mousedownfunction);
window.addEventListener("resize", resizeFunction);
var newPoint = function (e, t) { var n = Object.create(null); n.x = e; n.y = t; n.connected = []; n.mult = function (e) { return newPoint(n.x * e, n.y * e) }; n.add = function (e) { return newPoint(n.x + e.x, n.y + e.y) }; n.clone = function () { return newPoint(n.x, n.y) }; return n
},
newLine = function (e) { var t = Object.create(null); t.p1 = e; t.point = function (e) { this.p2 = e; this.slope = (e.y - this.p1.y) / (e.x - this.p1.x); this.dx = e.x - this.p1.x; this.dy = e.y - this.p1.y; return this }; t.setSlope = function (e, t, n) { this.slope = e; if (isFinite(e)) { this.dx = 1; this.dy = this.slope } else { this.dx = t; this.dy = n } }; t.getB = function () { this.xint = this.xint || this.p1.y - this.p1.x * this.slope; return this.xint }; t.int = function (e) { var t = (e.getB() - this.getB()) / ((e.dx * this.dy - this.dx * e.dy) / this.dx * e.dx); return newPoint(t, t * this.slope + this.getB()) }; t.draw = function (e) { this.xint = this.p1.y - this.p1.x * this.slope; e.beginPath(); e.moveTo(0, this.xint); e.lineTo(Math.max(e.canvas.width, e.canvas.height), Math.max(e.canvas.width, e.canvas.height) * this.slope + this.xint); e.stroke() }; return Object.create(t)
}, delaunay = (function () { var exe = [], _delaunay = function () { var _points = points.slice(), newpoints = _points.filter(function (e) { return e.connected.length == 0 }), rand1 = Math.random(), rand2 = Math.random(); for (var count3 = 0, e = newpoints[count3]; e; e = newpoints[++count3]) { for (var count1 = 0, t = _points[count1]; t; t = _points[++count1]) { var n = newLine(e.clone().add(t).mult(.5)); n.setSlope((t.x + rand1 - e.x + rand2) / (e.y + rand1 - t.y + rand2)); for (var count2 = count1, r = _points[count2]; r; r = _points[++count2]) { if (r !== e && r !== t && e !== t) { var i = newLine(r.clone().add(t).mult(.5)); i.setSlope((t.x + rand1 - r.x + rand2) / (r.y + rand1 - t.y + rand2)); var s = n.int(i); var o = Math.sqrt((s.x - r.x) * (s.x - r.x) + (s.y - r.y) * (s.y - r.y)); ctx.strokeStyle = 'rgba(0,0,0,1)'; ctx.beginPath(); ctx.arc(s.x, s.y, o, 0, 2 * Math.PI, false); var u = _points.filter(function (n) { return n !== e && n !== t && n !== r }).filter(function (e) { var z = ctx.isPointInPath(e.x, e.y); return z }); if (u.length === 0) { ctx.save(); ctx.beginPath(); ctx.moveTo(e.x, e.y); ctx.lineTo(t.x, t.y); ctx.lineTo(r.x, r.y); ctx.lineTo(e.x, e.y); e.connected ctx.closePath(false); ctx.clip(); ctx.clearRect(0, 0, canvas.width, canvas.height); ctx.restore(); ctx.stroke(); ctx.beginPath(); ctx.arc(s.x, s.y, 5, 0, 2 * Math.PI, false); ctx.strokeStyle = 'rgba(255,0,0,1)'; ctx.stroke(); e.connected.push(t, r); t.connected.push(e, r); r.connected.push(e, t) } } } }; drawpoints(); if (exe.length !== 0) (exe.shift()); } }; return function () { exe.push( _delaunay()); if (exe.length === 1)(exe.shift()); }
}()), drawpoints = function () { points.forEach(function (e) { ctx.beginPath(); ctx.arc(e.x | 0, e.y | 0, 5, 0, 2 * Math.PI, false); ctx.fill(); ctx.stroke() }); bufferd.getContext('2d').clearRect(0, 0, canvas.width, canvas.height); bufferd.getContext("2d").drawImage(canvas, 0, 0, canvas.width, canvas.height, 0, 0, canvas.width, canvas.height); }, canvas = document.getElementsByTagName("canvas")[0], ctx = canvas.getContext("2d"), currentfunction = delaunay;
resizeFunction();
ctx.strokeStyle = "RGBA(0,0,0,1)";
ctx.fillStyle = "RGBA(255,255,255,.25)";
ctx.font = ctx.font.replace(ctx.font.split(" ")[0], "42px")
Slow Delaunay triangulation - Script Codes
Slow Delaunay triangulation - Script Codes
Home Page Home
Developer Darby Rathbone
Username blackkbot
Uploaded October 03, 2022
Rating 3
Size 3,316 Kb
Views 30,360
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