margin: 20px 400px 0;
canvas>
<script><br> var can=document.getElementsByTagName("canvas")[0];<br> var x=can.getContext("2d");<br><br> Function clock(){<br><br> //Clear the canvas once each time the code is executed</p> x.beginPath();<p> x.fillStyle="blue";<br> ); <br> x.closePath(); ();<br> x.fillStyle="#ffffff";<br> </p> x.closePath(); ;i<60;i++){<p> x.save(); //Save environment variables<br/> </p> x.rotate(i*6*Math.PI/180); //The interval between each scale is 6°, so i*6 draws all the scales when rotating<p> ;<br/> x.lineTo(0,230);<br/> x.stroke(); <br/> //Clock scales, there are only 12 clock scales, so 360/12 The interval between each one is 30°. The principle is the same as the minute scale. Of course you can also loop more, such as changing the scales to numbers<br/> for (var a=0;a<12;a++){<br/> x.save();</p> x.beginPath();<p> <br/> x.rotate(a*30*Math.PI/180);<br/> x.closePath();<br/> The sum and minutes must be accurate to the decimal point<br/><br/> var time=new Date();</p> var seconds=time.getSeconds();<p> var minutes=time.getMinutes()+seconds/60; <br/> var hours=time.getHours()+minutes/60;<br/><br/> var hours=time.getHours()+minutes/60; hours>12){<br> hours=hours-12<br> <br><br> to ’s ’s to ensue ’s to 20: 23-- beginPath () <br><p> Path();<br> *30*Math.PI/180);//After drawing the hour hand, the current hour *30 is the number of degrees that should be rotated. <br> x.restore( );<br><br> x.lineWidth=3;<br> x.rotate(minutes*6*Math.PI/180); //The same applies to the minute hand<br> ();<br> x.closePath(); ath();<br> x.moveTo(0,10 );<br> // The small dot on the second hand<br></p> x.save();<p> x.beginPath();<br> PI/180);//Let the small dot of the second hand follow the position of the second hand, which is actually the same as the second hand<br> x.fillStyle="blue";<br> *360/180);<br> Click<br> <br> x.beginPath();<br> <br> x.closePath(); (250,250,3,0,Math.PI*360/180);<br> x.fill();<br> x.closePath();</p>
<p> setInterval(clock,1000) ; //Run this method every second. It will first clear the canvas and then redraw it so that the time is moving every second. <br> </script>
## Effect
The above is the detailed content of Simple example of canvas clock in canvas. For more information, please follow other related articles on the PHP Chinese website!