Created
November 29, 2014 16:21
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3 círculos usando canvas html5
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| <!DOCTYPE HTML> | |
| <html> | |
| <head> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <style> | |
| body { | |
| margin: 0px; | |
| padding: 0px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <button type="button" id="clear">CLS</button> | |
| <canvas id="myCanvas" width="400" height="400"></canvas> | |
| <script> | |
| var canvas = document.getElementById('myCanvas'); | |
| var context = canvas.getContext('2d'); | |
| var centerX = canvas.width / 2; | |
| var centerY = canvas.height / 2; | |
| var radius = 60; | |
| context.beginPath(); | |
| context.arc(1/2 * centerX, centerY, radius, 0, 2 * Math.PI, false); | |
| context.fillStyle = 'red'; | |
| context.fill(); | |
| context.lineWidth = 2; | |
| context.strokeStyle = '#fff'; | |
| context.stroke(); | |
| context.beginPath(); | |
| context.arc(centerX, centerY, radius, 0, 2 * Math.PI, false); | |
| context.fillStyle = 'green'; | |
| context.fill(); | |
| context.lineWidth = 2; | |
| context.strokeStyle = '#fff'; | |
| context.stroke(); | |
| context.beginPath(); | |
| context.arc(3/2 * centerX, centerY, radius, 0, 2 * Math.PI, false); | |
| context.fillStyle = 'blue'; | |
| context.fill(); | |
| context.lineWidth = 2; | |
| context.strokeStyle = '#fff'; | |
| context.stroke(); | |
| d3.select('#clear').on('click', function() { | |
| context.clearRect(0, 0, canvas.width, canvas.height); | |
| }, false); | |
| </script> | |
| </body> | |
| </html> |
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