Canvas: Difference between revisions
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== Examples == | == Examples == | ||
<source lang="javascript"> <!DOCTYPE html> | <source lang="javascript"><!DOCTYPE html> | ||
<html> | <html> | ||
<head> | <head> | ||
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x+=60 | x+=60 | ||
} | } | ||
</script> | </script> | ||
</head> | </head> | ||
Revision as of 16:37, 24 September 2012
The canvas tag was introduced by Apple and has been standardized to become part of HTML5.
A example for color cycling with the canvas element [[1]]
Get the canvas tag:
c=document.getElementById("c")
Get the "context" (like a paper):
p=c.getContext("2d");
Draw something!
p.fillRect(0, 0, 100, 100);
Examples
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script>
function draw(){
c = document.getElementById("c")
//console.log("c is",c)
p = c.getContext("2d")
x = 10
while (x<3000) {
p.strokeRect(x,100,20,40)
x+=60
}
</script>
</head>
<body onload="draw()">
<h1>Hello canvas</h1>
<canvas id="c" width="640" height="640" style="border: 3px dotted red"></canvas>
</body>
</html>