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JS callback prior to rendering

In the iOS javascript API, is there a way to get a callback prior to an AR frame being rendered ? 


I'm interested in re-positioning some drawables ahead of each frame (kind of like in a game loop) in ways that would be complex to do with PropertyAnimations and AnimationGroups alone, but would be very easy if I could just set the position / rotation of the drawable myself every frame.


I realize this would probably be easier if I weren't using the Javascript API :)




Thanks! That sounds great

Hi David,

I'm changing the status to resolved but don't hesitate to ask follow up questions. 


Best regards,

Andreas

Hi David,

you could write a plugin for the Wikitude SDK. Plugins have a hook (Plugin::update(...)) you can implement which is called before any rendering is done. Inside this method you can again make a call into JS using the `-callJavaScript:` method of WTArchitectView or `addToJavaScriptQueue(const std::string& js)` from Plugin.h.


Best regards,

Andreas

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