Created
May 4, 2016 12:12
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<!DOCTYPE html> | |
<html> | |
<body> | |
<canvas id="draw"></canvas> | |
<script> | |
var canvas = document.getElementById("draw"); | |
var ctx = canvas.getContext("2d"); | |
canvas.width = 300; | |
canvas.height = 300; | |
canvas.style.backgroundColor = '#000'; | |
ctx.fillStyle = "#f00"; | |
ctx.beginPath(); | |
ctx.arc(250, 50, 50, 0, 2 * Math.PI); | |
ctx.fill(); | |
ctx.fillStyle = "#bb2"; | |
ctx.fillRect(0 , 0, 100, 100); | |
ctx.fillStyle = '#000'; | |
ctx.beginPath(); | |
ctx.arc(150, 150, 50 * Math.sqrt(10), Math.PI + Math.atan2(1, 3), Math.PI + Math.atan2(3, 1)); | |
ctx.fill(); | |
ctx.beginPath(); | |
ctx.moveTo(100, 0); | |
ctx.lineTo(0, 100); | |
ctx.lineTo(100, 100); | |
ctx.fill(); | |
ctx.fillStyle = "#888"; | |
ctx.fillRect(200 , 200, 100, 100); | |
ctx.fillStyle = '#000'; | |
ctx.beginPath(); | |
ctx.arc(150, 150, 50 * Math.sqrt(10), Math.atan2(1, 3), Math.atan2(3, 1)); | |
ctx.fill(); | |
ctx.beginPath(); | |
ctx.moveTo(200, 300); | |
ctx.lineTo(300, 200); | |
ctx.lineTo(200, 200); | |
ctx.fill(); | |
ctx.fillStyle = "#fff"; | |
ctx.fillRect(100, 0, 100, 300); | |
</script> | |
</body> | |
</html> |
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