Rotate around anchor property

[floatdrop]

PIXI.Sprite have nice anchor property, but DisplayObject haven't. This creates difficulties to create camera, that rotates around the player (#83). Needs to be checked twice.

[floatdrop]

Bump here.

[GoodBoyDigital]

Hey @floatdrop,

This code is great - it kind of makes the sprite anchor and the display object anchor behave differently though, which could lead to confusion. What are peeps thoughts on this?

[Fishrock123]

Shouldn't the Sprite's anchor be it's inherited DisplayObject anchor?

[floatdrop]

Well, it's a bit tricky, @Fishrock123. Sprite anchor use percentage to set an origin - an this is awesome feature, that I like. DisplayObject anchor must be in pixels (because DisplayObject don't know about width of itself). But in other angle of view, DisplayObject can't get percentage anchor, because DisplayObjectContainer is inherits from DisplayObject and it's have'nt texture to count pixels from! This leads to two ways of solving this. First - get our code dirty by this:

    var ax = this instanceof Sprite ? 0 : this.anchor.x;
    var ay = this instanceof Sprite ? 0 : this.anchor.y;

Second: drop the percentage functionality from Sprite.
What you think, @GoodBoyDigital? (Also, I don't see, how sprite is rotated in WebGL, could you point it out for me?)

[Fishrock123]

Why not just have sprite convert from percentage to pixels when set via setAnchor(PIXI.Point); or something?

EDIT: or even better: PIXI.Sprite.setAnchorByPercent(PIXI.Point);

[floatdrop]

Seems working to me.

[floatdrop]

Bump again. (Sorry for persistence).

[GoodBoyDigital]

No worries @floatdrop !
I am working on a new build at the moment and will roll this in to the next update :)

[GoodBoyDigital]

Hey @floatdrop just updated the pixi build..

a display object now has a pivot point.. I used your code and it works a treat 👍

Thanks!

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