Sprite Origin, and Pixel Perfect Sprites

[JohnForster]

Is it possible to set the origin for a sprite to the corner, rather than the centre? The default method means that sprites with an odd number of horizontal pixels are misaligned with sprites with an even number of horizontal pixels.

Also, is there a way to ensure that sprites are always natively pixel perfect?

[visualcode-t]

Does anybody have an answer to this? 2D is pretty difficult because of this issue.

[lukors]

You could try making the sprite a child of an entity with Transform and GlobalTransform components that represents the gameplay position of the sprite, and then offset the sprite by its width and height divided by two.

It'd be important that the parent's location is used instead of the sprite's in gameplay code, because transform propagation happens late in the frame, so you'll use the previous frame's position otherwise.

For pixel perfectness: I haven't tried this myself, but tried throwing away the fraction of the sprite's position with something like "floor"?

[ifkb99]

I realize this is very old, but I found a solution to changing the origin that works for me.

By using this code I offset the camera to make the origin seem like the top left:

fn setup(mut commands: Commands, win: Res<Windows>) {
    let w = win.get_primary().unwrap();

    // set origin to top left
    let mut camera = OrthographicCameraBundle::new_2d();
    camera.transform.translation.x += w.width() / 2.;
    camera.transform.translation.y += w.height() / 2.;
    commands.spawn_bundle(camera);
}