64.canvas画一个表(1)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 | <!DOCTYPE html> <html lang= "en" > <head> <meta charset= "UTF-8" > <meta name= "viewport" content= "width=device-width, initial-scale=1.0" > <meta http-equiv= "X-UA-Compatible" content= "ie=edge" > <title>Document</title> <style> body { margin: 0; padding: 0; text-align: center; } </style> </head> <body> <canvas id= "canvas" ></canvas> <script> let canvasWidth = 600; let canvasHeight = 600; let centerX = canvasWidth / 2; let centerY = canvasHeight / 2; let r = canvasWidth / 2 - 4; let canvas = document.getElementById( 'canvas' ); canvas.width = canvasWidth; canvas.height = canvasHeight; let ctx = canvas.getContext( '2d' ); function setCanvasStrokeStyle() { } function drawClock() { ctx.beginPath(); ctx.strokeStyle = "orange" ; ctx.lineWidth = 4; ctx.arc(centerX, centerY, r, 0, Math.PI * 2, true ); ctx.stroke() } function drawHours() { let rad = 2 * Math.PI / 12 for ( let i = 1; i <= 12; i++) { ctx.save(); ctx.beginPath(); ctx.translate(centerX, centerY); ctx.rotate(rad * i) ctx.translate(-centerX, -centerY); ctx.strokeStyle = "orange" ; ctx.lineWidth = 4; ctx.moveTo(centerX, centerY - r); ctx.lineTo(centerX, centerY - r + 24); ctx.font = "26px Arial" ; ctx.textAlign = "center" ; ctx.fillStyle = "orange" ; ctx.fillText(i, centerX, centerY - r + 54); ctx.stroke(); ctx.restore() } } function drawMinutes() { let rad = 2 * Math.PI / 60 for ( let i = 1; i <= 60; i++) { ctx.save(); ctx.beginPath(); ctx.translate(centerX, centerY); ctx.rotate(rad * i) ctx.translate(-centerX, -centerY); ctx.strokeStyle = "orange" ; ctx.lineWidth = 2; ctx.moveTo(centerX, centerY - r); ctx.lineTo(centerX, centerY - r + 16); ctx.stroke(); ctx.restore() } } // 画时针 分针 秒针 function drawTimeLine() { ctx.beginPath(); ctx.arc(centerX, centerY, 20, 0, Math.PI * 2, true ); ctx.fillStyle = "orange" ; ctx.fill(); // 时针 ctx.save() ctx.beginPath(); ctx.lineWidth = 10; ctx.translate(centerX, centerY); ctx.rotate(Math.PI / 4) ctx.translate(-centerX, -centerY); ctx.moveTo(centerX, centerY); ctx.lineTo(centerX, centerY - r + 148); ctx.stroke(); ctx.restore() // 分针 ctx.save() ctx.beginPath(); ctx.translate(centerX, centerY); ctx.rotate(Math.PI / 2) ctx.translate(-centerX, -centerY); ctx.lineWidth = 6; ctx.moveTo(centerX, centerY); ctx.lineTo(centerX, centerY - r + 108); ctx.stroke(); ctx.restore() // 秒针 ctx.beginPath(); ctx.lineWidth = 4; ctx.moveTo(centerX, centerY); ctx.lineTo(centerX, centerY - r + 68); ctx.stroke(); } drawClock(); drawHours(); drawMinutes(); drawTimeLine(); </script> </body> </html> |
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