Created
November 29, 2017 19:41
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Fractal fun with JavaScript
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| <html> | |
| <head> | |
| <title>Canvas Fractals</title> | |
| </head> | |
| <body> | |
| <canvas id="myCanvas" width="401" height="401"></canvas> | |
| <script> | |
| var c = document.getElementById("myCanvas"); | |
| var ctx = c.getContext("2d"); | |
| ctx.translate(0.5, 0.5); // anti-alias trick | |
| function drawLine(p0, p1, color="black") { | |
| ctx.beginPath(); | |
| ctx.moveTo(p0.x, p0.y); | |
| ctx.lineTo(p1.x, p1.y); | |
| ctx.strokeStyle = color; | |
| ctx.lineWidth = 1; | |
| ctx.stroke(); | |
| } | |
| function drawTriangle(p0, p1, p2) { | |
| drawLine(p0, p1) | |
| drawLine(p1, p2) | |
| drawLine(p2, p0) | |
| } | |
| function drawFract(p0, p1, p2, limit){ | |
| if(limit > 0){ | |
| const pA = { | |
| x: p0.x + (p1.x - p0.x)/2, | |
| y: p0.y - (p0.y - p1.y)/2 | |
| }, | |
| pB = { | |
| x: p1.x + (p2.x - p1.x)/2, | |
| y: p1.y - (p1.y - p2.y)/2 | |
| }, | |
| pC = { | |
| x: p0.x + (p2.x - p0.x)/2, | |
| y: p0.y | |
| }; | |
| drawFract(p0, pA, pC, limit-1); | |
| drawFract(pA, p1, pB, limit-1); | |
| drawFract(pC, pB, p2, limit-1); | |
| } | |
| else{ | |
| drawTriangle(p0,p1,p2); | |
| } | |
| } | |
| drawFract({x: 0, y:400},{x:200, y:0}, {x:400, y:400}, 6) | |
| </script> | |
| </body> | |
| </html> |
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