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Sin Cos Wave
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| <!DOCTYPE html> | |
| <html> | |
| <body> | |
| <canvas id="myCanvas" width="600" height="600" style="border:1px solid #d3d3d3;"> | |
| Your browser does not support the HTML5 canvas tag.</canvas> | |
| <script> | |
| var c = document.getElementById("myCanvas"); | |
| var ctx = c.getContext("2d"); | |
| function draw(f,s,l, angle = 90){ | |
| ctx.beginPath(); | |
| for(x=0; x<360*2; x += 20){ | |
| ctx.moveTo(x+5,s); | |
| ctx.lineTo(x,s); | |
| } | |
| ctx.stroke(); | |
| ctx.beginPath(); | |
| ctx.moveTo(30,(s - f(0)*l)); | |
| for(x=0; x<=360; x++){ | |
| y = s - f(x*Math.PI/angle)*l; | |
| ctx.lineTo(x+30,y); | |
| } | |
| ctx.stroke(); | |
| } | |
| draw(Math.cos, 100, 45); | |
| draw(Math.sin, 300, 45); | |
| draw(Math.sin, 400, 20); | |
| draw(Math.sin, 500, 45, 20); | |
| </script> | |
| <p><strong>Note:</strong> The canvas tag is not supported in Internet | |
| Explorer 8 and earlier versions.</p> | |
| </body> | |
| </html> |
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