The rotation of the sprite seems to interfer with the clip region

John

When you create a bitmap and apply setClip() to it and rotate the sprite in a loop. The clip region incorrectly change size during the animation. It expand and shrink the clipped area as you rotate the bitmap.

When you create a sprite and apply the same setClip() region to it and then add the bitmap as a child of this sprite. Rotating the bitmap doesn't interfer the clip region.

Not sure if this is intentional or a bug.

MoKaLux

given the Bitmap class inherits the Sprite class I would say this is expected behaviour? my two cents 🙂

John

This shows what I mean

hgy29

@John, yes, clipping is supposed to be applied to the 'inside' sprite content, that is not transformed by setPosition/setRotation and others. When you apply transforms, Gideros tries to compute the transformed clip region, which has to be axis aligned for technical reasons (it ends up being applied thanks to glScissors, which is a cheap operation). Gideros thus takes the bounding box of the transformed Sprite as the new clipping region, which is probably what you see.

MoKaLux

@John both effects look very cool 😎.