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I can't seem to find the function to remove a shape or path from the canvas after it has been created.
So I'm creating a bezier curve between 2 points with
beginPath();
bezierCurveTo();
stroke();
closePath();
How can I remove this from the canvas once it's been created? I need to be able to call the remove function via toggle() and blur(). I'm sure something exists for this...
Thanks in advance for any help!
430
You can't remove a path/shape from the canvas. You can draw something else over it or clear the canvas. Show activity on this post. You might try using SVG instead of canvas.
To clear the Canvas, you can use the clearRect() method. This method performs pretty well than others for clearing the canvas (such as resetting the width/height, destroying the canvas element and then recreating it, etc..) const context = canvas. getContext('2d'); context.
From the course navigation menu, select Settings. In the "Settings" sidebar at the right, select Delete All Course Content. You will be prompted to confirm. To proceed, click Reset Course Content, or click Cancel to cancel.
You can easily clear you canvas by resetting its width and height. For example: canvas. width = canvas. width should clear your drawing context.
Try this:
ctx.save();
ctx.globalCompositeOperation = "destination-out";
// drawing here you path second time
ctx.restore();
"The globalCompositeOperation attribute sets how shapes and images are drawn onto the scratch bitmap" specs
How it works you can see here.
164
This is an important thing to realise about <canvas>. It's a flattened image made up of pixels. Once something's drawn to it, it's merged into the pixel grid and cannot be differentiated from the other pixels.
If you need to be able to separate image elements you could:
<canvas> elements into a stack of layers<svg> in which each visual element is distinct from the other elements and may be manipulated independentlyYou can think of <canvas> as being a single layer in PhotoShop/Gimp/Fireworks, or an MSPaint document.
You can think of <svg> as a document in Illustrator/InkScape.
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