Depth of field effect

[mkrus]

works although I'm not sure that's really what we expect. Would like the car to remain in focus and what's behind it to be blurry, but we don't have anything around it.

While the UI is useful to debug, don't think we want it in the final demo, just an on/off switch I would think.

Getting loads of Floating point comparison needs context sanity check in the console

[lemirep]

Seems to be working perfectly like I would expect. I'd suggest creating a new example better suited to demoing that effect rather than having it on the car demo.

[zakalawe]

Yep I'll make a task for such an example

[lemirep]

@zakalawe perfect thanks. @jcelerier could you instantiate the DepthOfField effect in forwardrenderer_scene instead of the car_demo please?

[jcelerier]

done, just have to write a bit of documentation

[jcelerier]

now with documentation

[lemirep]

Rebased