coordinate system

Could you explain the system please?

I am assuming the centre is 0,0, Is the centre of the object or the corner placed in the centre?

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You are right (0, 0) is the center of the world. If you don't move the camera, it's also the center of the screen.

When you do

myObject.setPosition(x, y);

you are placing the center of the object at (x, y) coordinates in the world.


aspectratio = window.devicePixelRatio || 1

could I also suggest you take the above line into consideration as it affects everything. screen size as well.

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