Trying to understand why BonVision SphereMapping operator does not accept direct input

[banchan86]

Following the example in the define display section of the basic workflow guide on https://bonvision.github.io/pages/01-Basic-Workflow/#draw-stimuli, it seems like spheremapping should accept any DrawX stimuli as input.

However, a direct connection does not work , but Publish/Subscribe subject pair with a single DrawX operator works (see attached bonsai workflow).

I'm just trying to understand why that is the case and if its a bug or simply something that I missed (as it seems that in the case of a single DrawX operator for the Publish/Subscribe subject pair it would pass on the same input as the direct connection). It would also help me in updating the BonVision documentation

Spheremap-directinput-doesnotwork.zip

[bruno-f-cruz]

SphereMapping operates on top of a given ViewMatrix (Matrix4 type) and renders all stored textures using/to a cubemap view/texture.

As a result, the input of SphereMapping must be some sort of ViewMatrix such that distortition from the mapping can be applied on top of it.

If you go back to the example you sent (the one that doesnt work), the output of DrawCheckerboard is an int (if you are curious, it is actually the phase of the checkerboard :P).

The secone example, the output of OrthographicView is the view matrix (OpenTk.Matrix4), so everything works fine.

If you add the subject right after OrthographicView everything will still work since subjects behave as sinks.

Hope it helps!

[banchan86]

Thanks @bruno-f-cruz that was very helpful!