Forums Solaris and Karma how to get an object to sit on the ground $YMAX not working

how to get an object to sit on the ground $YMAX not working

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Mark Wallman
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Hi

So within the stage context how you you go about getting an object to sit on the ground. Adding a transform and typing $YMAX does not work in stage. Im trying to make a lookdev tool, so want any object that comes in to be processed to “sit on the ground” rather than through the ground.

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Mark
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jason_iversen
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Here's a snippet of something I was messing with - if you have extentHints authored. Perhap you can bend it to your will? YMMV…
from pxr import UsdGeom, Gf

# resolve your 'prim'

# transform to the centroid of XZ and the floor of Y

xh = prim.GetAttribute("extentsHint").Get()
if xh:
    xform = UsdGeom.Xform(prim)
    xform.ClearXformOpOrder()
    t = xform.AddTranslateOp(opSuffix="center")
    dx = (xh[1][0]+xh[0][0])/2
    dz = (xh[1][2]+xh[0][2])/2 
    dy = xh[0][1]
    t.Set(Gf.Vec3d(-dx,-dy,-dz))

That said, I think LOPs could use some nice alignment/match-size/etc style tools.
Edited by jason_iversen - June 2, 2020 23:33:48
Jason Iversen, Technology Supervisor & FX Pipeline/R+D Lead @ Weta FX
also, http://www.odforce.net [www.odforce.net]
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jsmack
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jason_iversen
That said, I think LOPs could use some nice alignment/match-size/etc style tools.

Indeed, that match size sop from the a couple releases back has become quite clutch. It would make a fine addition to LOPPERs.
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