DjangoBB LoFi version

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

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

Mark Wallman

June 2, 2020 16:30:54

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.

Best

Mark

jason_iversen

June 2, 2020 20:39:33

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.

jsmack

June 2, 2020 22:56:22

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.