2d and 3d compatibility

[Xiaoming Zhang]

A developer sent a pull request to make “RotateTo” support 3d rotation https://github.com/cocos2d/cocos2d-x/pull/7631.

But i think many codes doesn’t support 3d, such as other actions.

So i think we have to make engine more compatible with 3d concept before merging this pull request.

What’s your opinion?

Best Regards

Minggo

[Xiao Yang]

I agree. We should do much work to make it more compatible with 3d.

Take the SetPosition3D for example, it does not set the _transformDirty to true if only change the z. 

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[Hao Wu]

Then thats a bug, we need to fix

but for 3d rotation, we don't need to make it complex

remember our target user, which is 2d user, 2.5d user, we should not adding lots of 3d concepts such as Euler, Quaternion, it is scary for them. lets just keep it simple and consistent for now, if you really want to do proper 3d rotation, use "setAdditionalTransform"

[Ricardo Quesada]

agreed with Hao.

If there is a bug, let's fix it.

But in the meantime, we should keep the API simple to use. We are not a full 3d engine now.