Lightning

Developer
Findoff
Size
2,284 Kb
Views
38,456
  1. Lightning Previews
  2. Lightning HTML Codes
  3. Lightning CSS Codes
  4. Lightning JS Codes

How do I make an lightning?

Base for lightning balls pen http://codepen.io/findoff/pen/DnhGp/?editors=001. What is a lightning? How do you make a lightning? This script and codes were developed by Findoff on 03 October 2022, Monday.

Lightning Previews
IQ Test

Lightning - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>lightning</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <canvas id="canvas1"></canvas> <script src="js/index.js"></script>
</body>
</html>

Lightning - Script Codes CSS Codes

#canvas1 { border: 1px solid #000;
}

Lightning - Script Codes JS Codes

var canvas = document.getElementById('canvas1'), ctx = canvas.getContext('2d');
canvas.width = 700;
canvas.height = 300;
function drawPoint(p, r, color) { ctx.fillStyle = color || '#000'; ctx.beginPath(); ctx.arc(p[0], p[1], r || 3, 0,Math.PI*2, 0); ctx.fill();
}
function vec2Len(a, b) { var x = b[0] - a[0]; var y = b[1] - a[1]; return Math.sqrt(x*x + y*y);
}
function vec2Lerp(a, b, p) { return [ (b[0]-a[0])*p+a[0], (b[1]-a[1])*p+a[1] ];
}
function vec2LerpShift(a, b, p, s) { var x = b[0] - a[0]; var y = b[1] - a[1]; var r = s/Math.sqrt( x*x + y*y ); var x2 = 0 * x - r * y; var y2 = 0 * y + r * x; return [ a[0] + x*p + x2, a[1] + y*p + y2 ];
}
function drawLightning(a, b) { var ps = []; var sx,sy; sx = sy = -500 for( var i=0 ; i<8 ; ++i ) { ps.push([Math.random(),Math.random()]); } ps.sort(); var t, l = vec2Len(a,b), sf = l*0.25, sf2; ctx.beginPath(); ctx.moveTo(a[0]+sx,a[1]+sx); for( var i=0 ; i<ps.length ; ++i ) { sf2 = (1 - Math.abs(ps[i][0]-0.5) * 2) * sf; t = vec2LerpShift( a,b,ps[i][0], ps[i][1]*sf2-sf2*0.5 ); ctx.lineTo(t[0]+sx,t[1]+sx); } ctx.lineTo(b[0]+sx,b[1]+sx); ctx.lineWidth = l/20; ctx.shadowBlur = l/8; ctx.shadowColor = 'rgba(64,0,255,1)'; ctx.shadowOffsetX = -sx; ctx.shadowOffsetY = -sy; ctx.strokeStyle = 'rgba(200,200,255,1)'; ctx.stroke(); ctx.beginPath(); ctx.moveTo(a[0],a[1]); for( var i=0 ; i<ps.length ; ++i ) { sf2 = (1 - Math.abs(ps[i][0]-0.5) * 2) * sf; t = vec2LerpShift( a,b,ps[i][0], ps[i][1]*sf2-sf2*0.5 ); ctx.lineTo(t[0],t[1]); } ctx.lineTo(b[0],b[1]); ctx.lineWidth = 1; ctx.stroke(); ctx.lineTo(b[0],b[1]);
}
var a = [100,100];
var b = [500,100];
/*var c = lerpShift(a,b,0.25,10);
drawPoint(c);*/
var render = function() { ctx.fillStyle = '#fff'; ctx.globalAlpha = 0.3; ctx.fillRect(0,0, canvas.width,canvas.height); ctx.globalAlpha = 1; drawLightning(a, b); drawPoint(a); drawPoint(b); setTimeout(render, 100);
};
render();
Lightning - Script Codes
Lightning - Script Codes
Home Page Home
Developer Findoff
Username findoff
Uploaded October 03, 2022
Rating 3.5
Size 2,284 Kb
Views 38,456
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