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How to scale and center Pixi.js stage in the maximized canvas element?

Alexander Farber

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Hello and good evening!

I am trying to develop a board game and would like to:

  • Use HTML elements like buttons etc.
  • Give Pixi.js max possible space and fit + center-align the game board inside the canvas element

Ivan had suggested to scale the stage and the children will be scaled automatically.

I have tried it in the attached file (and here is a jsfiddle), but just cannot figure out the math for scaling. Also, my dragging code breaks.



Screenshot 2020-10-20 at 20.20.08.png


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Try this :

var ratio;

   ratio = Math.min(window.innerWidth / your_default_screen_width, window.innerHeight /  

_applyRatio(displayObj: PIXI.DisplayObject, ratio: number)
     if (ratio == 1) return;
     var obj: any = displayObj;
     obj.position.x = obj.position.x * ratio;
     obj.position.y = obj.position.y * ratio;
     obj.scale.x = obj.scale.x * ratio;
     obj.scale.y = obj.scale.y * ratio;

_applyRatio(bunny, 1 / ratio);


Edited by ozgun
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Thanks for you suggestion ozgun, but I didn't want to go through all the children of app.stage and apply some transforms to all of them.

At the end I have solved my problem with the attached file.

I have also posted my answer at Stackoverflow: https://stackoverflow.com/a/64528244/165071

Screenshot 2020-10-25 at 21.01.26.png


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