Getting view 2d rect from 3d geometry

[Alexey Vanzhula]

Can I get somehow 2d rect from SOP geometry using viewport transformation matrix?

[anim]

you can maybe generate your square in SOPs using toNDC() then bbox and isolate front face then back to object space fromNDC() 

then use hou.GeometryViewport.mapToScreen() to get viewport coordinates of any of it's points

if you have any object level transform you may need to apply it before using mapToScreen()

[Alexey Vanzhula]

14 hours ago, anim said:

you can maybe generate your square in SOPs using toNDC() then bbox and isolate front face then back to object space fromNDC() 

then use hou.GeometryViewport.mapToScreen() to get viewport coordinates of any of it's points

if you have any object level transform you may need to apply it before using mapToScreen()

Thanks! I'll try it.