adjusting individual polygon UVs ?

[Mdonovan]

Hi I am trying to do a flip card animation where the polygons flip over to reveal the texture on the backside of a grid. I am new to houdini and don't know how to rotate or scale the individual uv islands so that the  backside reads correctly after its done rotating. see below. I am separating the polys using a facet sop and then looping through each individual poly using a for each and rotating each poly in x using a primitive SOP.

 

Any ideas ?

 

Thanks

 

 

 

Edited June 19, 2015 by Mdonovan

[konstantin magnus]

reminds me of a tutorial by peter quint:

 

https://vimeo.com/15104370

[Atom]

Split your 3D view Left/Right and move your mouse into the new view. Press SPACEBAR-5 to activate the UV viewer. Inside your UV Project node try scaling the y-axis by -1. Or post your file so far so we can have a look.

Edited June 19, 2015 by Atom

[Mdonovan]

Thanks guys ... here is the hip (its zipped with the textures).

 

Atom ... I have not tried your suggestion yet ... but ... I need to scale each polygons uv individually I think.

 

 

 

 

 

flipcard.zip

Edited June 19, 2015 by Mdonovan

[Mdonovan]

just attached the file

[Atom]

I have been reviewing the file and the best guess I can come up with is that inside the FOREACH instead of using "prim" in your expression consider using "primuv" instead. You will need to also multiply the u and v values by the FORVALUE.