Trying to scale with gsap and canvas

[rocketman97]

Hi everyone, I’m struggling with scaling a canvas object using GSAP. Unlike the x and y properties, scaling doesn’t seem to work the same way. Does anyone have a workaround for this?

[GSAP Helper]

Without a minimal demo, it's very difficult to troubleshoot; the issue could be caused by CSS, markup, a third party library, a 3rd party script, etc. Would you please provide a very simple CodePen or Stackblitz that illustrates the issue? 

 

Please don't include your whole project. Just some colored <div> elements and the GSAP code is best. See if you can recreate the issue with as few dependencies as possible. Start minimal and then incrementally add code bit by bit until it breaks. Usually people solve their own issues during this process! If not, at least we have a reduced test case which greatly increases your chances of getting a relevant answer.

 

See the Pen aYYOdN by GreenSock (@GreenSock) on CodePen.

that loads all the plugins. Just click "fork" at the bottom right and make your minimal demo: 

 

Using a framework/library like React, Vue, Next, etc.? 

CodePen isn't always ideal for these tools, so here are some Stackblitz starter templates that you can fork and import the gsap-trial NPM package for using any of the bonus plugins: 

• React (please read this article!)
• Next
• Svelte
• Sveltekit
• Vue
• Nuxt

 

Please share the StackBlitz link directly to the file in question (where you've put the GSAP code) so we don't need to hunt through all the files. 

 

Once we see an isolated demo, we'll do our best to jump in and help with your GSAP-specific questions. ✅

 

Finally what exactly are you trying to do? Scale the actual <canvas> tag or an element inside the canvas context? FYI those are completely different things.

[rocketman97]

Hi , thanks. Sorry for not uploading a code pen earlier, but this is what I was referring to. My box object can be animated with x and y values in GSAP but i cant seem to scale it.  

See the Pen dyBZqMx by razorchoice (@razorchoice) on CodePen.

[mvaneijgen]

I'm no canvas expert, but you'll definitely also have to expose the scale property on the object and then also set it. I've got something working, but due to I  know how canvas works it is doing something weird, but it is doing some scaling? Hope it helps and happy tweening! 

 

See the Pen wvLPEZp?editors=0011 by mvaneijgen (@mvaneijgen) on CodePen.

[Rodrigo]

Hi,

 

I'm not 100% sure of what seems to be the issue here or what you're trying to achieve, but in your demo it seems to work with this:

function anim() {
  console.log(boxes);
  boxes.forEach((box, i) => {
    gsap.to(box, {
      x: box.x + (i > 0 ? 50 : -50),
      y: box.y + (i > 0 ? 50 : -50),
      scale: 1.2, // Scale up to 1.5 times
      repeat: -1,
      yoyo: true,
      duration: 0.5
    });
  });
}

Here is a fork of your demo:

See the Pen YzoEbWZ by GreenSock (@GreenSock) on CodePen.

 

Hopefully this helps

Happy Tweening!

[rocketman97]

On 8/14/2024 at 9:02 AM, mvaneijgen said:

I'm no canvas expert, but you'll definitely also have to expose the scale property on the object and then also set it. I've got something working, but due to I  know how canvas works it is doing something weird, but it is doing some scaling? Hope it helps and happy tweening! 

 

 

 

thanks so much, this worked