Canvas- Curved Lines and Shapes (Circle, Arc, Bezier, Ellipse and etc.)
Written by 13 June 2013
Graphical objects are not all made up of straight lines. HTML5 Canvas has different functions for drawing curved lines and shapes. You can draw Ellipses and Bezier shapes with one or two control points. It is also possible to draw circles or just an arc within two points. The following codes have different usages of HTML5 Canvas curved lines and shapes; for example we have used these features for creating curved corners of a rectangle.
Code Snippet:
<!-- this script is provided by www.html5freecode.com coded by: Kerixa Inc. -->
<!-- This Script is from www.html5freecode.com, Coded by: Kerixa Inc-->
<br>
<canvas id="myCanvas" width="400" height="230"></canvas>
<script>
var cnv = document.getElementById('myCanvas')
var ctx = cnv.getContext('2d')
var deg = Math.PI/180
ctx.beginPath()
ctx.arc(60, 70, 50, 0, 130*deg, false)
ctx.lineWidth= 2
ctx.fillStyle= "lightblue"
ctx.strokeStyle= "magenta"
ctx.fill()
ctx.stroke()
ctx.beginPath()
ctx.moveTo(10, 70)
ctx.bezierCurveTo (60, 70, 60, 0, 110, 70)
ctx.lineWidth= 2
ctx.fillStyle= "pink"
ctx.strokeStyle= "Brown"
ctx.fill()
ctx.stroke()
ctx.beginPath()
ctx.moveTo(200, 20)
ctx.lineTo(250, 20)
ctx.quadraticCurveTo(280, 20, 280, 40)
ctx.lineTo(280, 180)
ctx.quadraticCurveTo(260, 180, 250, 200)
ctx.lineTo(200, 200)
ctx.quadraticCurveTo(190, 180, 170, 180)
ctx.lineTo(170, 40)
ctx.quadraticCurveTo(170, 20, 200, 20)
ctx.lineWidth= 2
ctx.fillStyle= "lightgreen"
ctx.strokeStyle= "darkgreen"
ctx.fill()
ctx.stroke()
</script>
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Example:
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