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Js+canvas drawing Clock effect _javascript skill

Source: Internet
Author: User
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This example for you to share the use of canvas to draw a clock specific code for your reference, the specific contents are as follows

1. clock.html

<!doctype html>

2. JavaScript code 

<script> var Canvas=document.getelementbyid ("Canvas");
    var context=canvas.getcontext (' 2d ');
    Draw ();
      The function Draw () {//Gets the current system's time in minutes var now=new Date ();
      var sec=now.getseconds ();
      var min=now.getminutes ();
      var hour=now.gethours ();
 
       
      hour>=12&& (HOUR=HOUR-12);
      var radius = math.min (CANVAS.WIDTH/2,CANVAS.HEIGHT/2);
      Initialize canvas context.save ();
       Context.clearrect (0,0,canvas.width,canvas.height); 
      Context.translate (CANVAS.WIDTH/2,CANVAS.HEIGHT/2);
      Context.rotate (-MATH.PI/2);
   
      Context.save ();
      Table frame//hour scale context.strokestyle= "black";
      Context.fillstyle= "BLACK";
      context.linewidth=3;
      context.linecap= "Round";
      Context.beginpath ();
        for (Var i=0;i<12;i++) {context.rotate (MATH.PI/6);
        Context.moveto (radius-30,0);
 
      Context.lineto (radius-10,0);
      } context.stroke ();
     Context.restore (); Context.save ();
      Minute scale context.linewidth=2;
      Context.beginpath ();
        for (Var i=0;i<60;i++) {if (!i%5==0) {Context.moveto (radius-15,0);
        Context.lineto (radius-10,0);
      } context.rotate (MATH.PI/30);
      } context.stroke ();
      Context.restore ();
 
      Context.save ();
       Draw Hand Context.rotate (MATH.PI/6) *hour+ (math.pi/360) *min+ (math.pi/21600) *sec);
       context.linewidth=6;
       Context.beginpath ();
       Context.moveto ( -10,0);
       Context.lineto (radius*0.5,0);
      Context.stroke ();
      Context.restore ();
 
       Context.save ();
   Context.rotate ((MATH.PI/30) *min+ (math.pi/1800) *sec);
   Context.strokestyle= "#29A8DE";
   context.linewidth=4;
   context.linecap= "Butt";
   Context.beginpath ();
   Context.moveto ( -20,0);
   Context.lineto (radius*0.7,0);
   Context.stroke ();
   Context.restore ();
 
   Context.save ();
   Context.rotate (SEC*MATH.PI/30);
   Context.strokestyle= "Red"; Context.linewidth=2;
   context.linecap= "Butt";
   Context.beginpath ();
   Context.moveto ( -30,0);
   Context.lineto (radius*0.9,0);
   Context.stroke ();
   Context.restore ();
 
      Context.save ();
       context.linewidth=4;
      Context.strokestyle= "Gray";
         Context.beginpath ();
     Context.arc (0,0,radius,0,math.pi*2,true);
     Context.stroke ();
 
 
     Context.restore ();
    Context.restore ();
 } window.onload=function () {setinterval (draw,1000)} </script>

The above is the entire content of this article, I hope to learn JavaScript program to help you.

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