100 lines
1.9 KiB
JavaScript
100 lines
1.9 KiB
JavaScript
function init(){
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clock();
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setInterval('clock()',1000);
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}
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function clock(){
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var now = new Date();
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var ctx = document.getElementById('tutorial').getContext('2d');
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ctx.save();
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ctx.clearRect(0,0,150,150);
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ctx.translate(75,75);
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ctx.scale(0.4,0.4);
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ctx.rotate(-Math.PI/2);
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ctx.strokeStyle = "black";
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ctx.fillStyle = "white";
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ctx.lineWidth = 8;
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ctx.lineCap = "round";
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// Hour marks
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ctx.save();
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ctx.beginPath();
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for (i=0;i<12;i++){
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ctx.rotate(Math.PI/6);
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ctx.moveTo(100,0);
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ctx.lineTo(120,0);
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}
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ctx.stroke();
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ctx.restore();
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// Minute marks
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ctx.save();
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ctx.lineWidth = 5;
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ctx.beginPath();
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for (i=0;i<60;i++){
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if (i%5!=0) {
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ctx.moveTo(117,0);
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ctx.lineTo(120,0);
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}
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ctx.rotate(Math.PI/30);
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}
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ctx.stroke();
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ctx.restore();
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var sec = now.getSeconds();
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var min = now.getMinutes();
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var hr = now.getHours();
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hr = hr>=12 ? hr-12 : hr;
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ctx.fillStyle = "black";
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// write Hours
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ctx.save();
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ctx.rotate( hr*(Math.PI/6) + (Math.PI/360)*min + (Math.PI/21600)*sec )
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ctx.lineWidth = 14;
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ctx.beginPath();
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ctx.moveTo(-20,0);
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ctx.lineTo(80,0);
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ctx.stroke();
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ctx.restore();
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// write Minutes
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ctx.save();
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ctx.rotate( (Math.PI/30)*min + (Math.PI/1800)*sec )
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ctx.lineWidth = 10;
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ctx.beginPath();
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ctx.moveTo(-28,0);
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ctx.lineTo(112,0);
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ctx.stroke();
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ctx.restore();
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// Write seconds
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ctx.save();
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ctx.rotate(sec * Math.PI/30);
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ctx.strokeStyle = "#D40000";
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ctx.fillStyle = "#D40000";
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ctx.lineWidth = 6;
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ctx.beginPath();
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ctx.moveTo(-30,0);
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ctx.lineTo(83,0);
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ctx.stroke();
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ctx.beginPath();
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ctx.arc(0,0,10,0,Math.PI*2,true);
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ctx.fill();
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ctx.beginPath();
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ctx.arc(95,0,10,0,Math.PI*2,true);
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ctx.stroke();
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ctx.fillStyle = "#555";
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ctx.arc(0,0,3,0,Math.PI*2,true);
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ctx.fill();
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ctx.restore();
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ctx.beginPath();
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ctx.lineWidth = 14;
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ctx.strokeStyle = '#325FA2';
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ctx.arc(0,0,142,0,Math.PI*2,true);
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ctx.stroke();
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ctx.restore();
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}
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init();
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