[Interest] Qt3D - Setting the Camera's ViewMatrix Directly

[Philip Schuchardt]

Nevermind, I figured it out. The QCamera can be accessed changed directly
through QCamera::transform()->setMatrix().



On Sun, Dec 4, 2016 at 9:54 AM Philip Schuchardt <vpicaver at gmail.com> wrote:

> In the next step of porting my OpenGL application to Qt3D, I trying to use
> my existing camera and interaction code. My interaction code creates and
> manipulates QMatrix4x4's for projection and view matrixes. It seems like
> Qt3D's camera doesn't provide direct access of ViewMatrix. My question is
> how do I set this directly? Can I subclass QCamera and control it directly?
> Could I make my code Camera an entry and not use QCamera? How would Qt3D
> interpret my camera as a QCamera and set the necessary uniforms in the
> shaders. Also, how would this play with CameraSelector nodes in the
> framegraph? Would I have to make a custom CameraSelector framegraph node?
> The nice thing about direct control of the ViewMatrix is there's no mystery
> about how the math works. Without direct access to the ViewMatrix, it'll
> take me a decedent amount to port my camera code...
>
> Also, how do you unproject a point on the screen using the QCamera and the
> viewport in Q3D? This is necessary for my interactions to work correctly.
>
> Thanks,
> Phi|ip
> --
> Phi|ip
>
-- 
Phi|ip
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