Animation Editing

Note

Common import:

from pxr import AnimGraphSchema, AnimGraphSchemaTools, UsdSkel
from pxr import Gf, Sdf, Usd

Get animation clip from prim

anim_clip = AnimGraphSchema.AnimationClip(prim)
has_anim = AnimationSchemaTools.HasAnimation(prim)

Get animation source

src_rel = anim_clip.GetInputsAnimationSourceRel()
if src_targets:
    src_skel_prim = stage.GetPrimAtPath(src_targets[0])

Get skeletal animation

src_skel_anim = UsdSkel.Animation(src_skel_prim)

Get translation from animation at time

timecode = Usd.TimeCode(0.0 * stage.GetTimeCodesPerSecond())
trans = animation.GetTranslationsAttr().Get(timecode)
rots = animation.GetRotationsAttr().Get(timecode)
scales = animation.GetScalesAttr().Get(timecode)
joints = animation.GetJointsAttr().Get()

New animation

animation_new_path = "/World/AnimationGraph/newAnimation"
animation_new = UsdSkel.Animation.Define(stage, animation_new_path)
# animation_new_prim = animation_new.GetPrim()

Set up animation data

with Sdf.ChangeBlock():
   animation_new.GetJointsAttr().Set(joints)
   animation_new.GetTranslationsAttr().Set(trans)
   animation_new.GetRotationsAttr().Set(rots)
   animation_new.GetScalesAttr().Set(scales)

   # animation_new.GetRotationsAttr().Clear()

Bind animation target

skeleton_prim = self.stage.GetPrimAtPath(skeleton_path)
skeleton_bindingAPI = UsdSkel.BindingAPI(skeleton_prim)
skeleton_bindingAPI.GetAnimationSourceRel().SetTargets([animation_new_path])