User:Joak/canvas1: Difference between revisions

Latest revision as of 12:22, 1 October 2012

<canvas id="c1" showsrc> something

function draw() {

 c = document.getElementById("c1");
 p = c.getContext('2d');
 drawer();

}

function drawer() {

   r = 0;
   r = 3;
   x = 250;
   y = 250;
   var positionx = x / 2;
   var positiony= y / 2;

   if( r < 3){

if(r == 3){ upordown = -0.02; } if(r == 0){ upordown = +0.02; } r=r+upordown; } r = Math.max(r, 0); r = Math.min(r, 3); r2 = map_range(r,0,3,3,0); movement = 400*Math.sin(r); movement2 =400*Math.sin(r2);

   var number1 = p.createRadialGradient(positionx,positiony,movement2,positionx,positiony,movement);
	number1.addColorStop(0, '#000000');
 	number1.addColorStop(1, '#FFFFFF');
 	
 	p.fillStyle = number1;
 	p.clearRect(0,0,c.width,c.height);
 	p.fillRect(0,0,x,y);
   setTimeout(drawer,10)

}

function map_range(value, low1, high1, low2, high2) {

   return low2 + (high2 - low2) * (value - low1) / (high1 - low1);

}

</canvas>

@@ Line 9: / Line 9: @@
 function drawer() {
-     x = window.innerWidth;
+    r = 0;
-     y = window.innerHeight;
+    r = 3;
+     x = 250;
+     y = 250;
      var positionx = x / 2;
      var positiony= y / 2;
-     if( r < 5){
+     if( r < 3){
 		if(r == 3){
 			upordown = -0.02;
@@ Line 28: / Line 30: @@
 	movement = 400*Math.sin(r);
 	movement2 =400*Math.sin(r2);
-	//console.log("r is ",r,"movement is",movement, "movement2 is", movement2);
      var number1 = p.createRadialGradient(positionx,positiony,movement2,positionx,positiony,movement);
@@ Line 37: / Line 38: @@
    	p.clearRect(0,0,c.width,c.height);
    	p.fillRect(0,0,x,y);
-    //console.log("i is",i);
      setTimeout(drawer,10)
 }
@@ Line 44: / Line 44: @@
      return low2 + (high2 - low2) * (value - low1) / (high1 - low1);
 }
 </canvas>