1 / 7

Linear Blend Skinning

Linear Blend Skinning. Same technique – different names. Linear blend skinning Skeleton Subspace Deformation ( SSD ) Smooth skinning (in Maya ). How it works? . Static character model (skeleton with joints) in neutral pose (dress pose)

meriel
Download Presentation

Linear Blend Skinning

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Linear Blend Skinning

  2. Same technique – different names • Linear blend skinning • Skeleton Subspace Deformation (SSD) • Smooth skinning (in Maya)

  3. How it works? • Static character model (skeleton with joints) in neutral pose (dress pose) • Each vertex assigned a set of influences with blending weight • Rigidly transform each neutral pose vertex (by all of its influencing joints) • Blending weights are used to combine these transformed positions

  4. Problems • It cannot represent complex deformations and suffers from characteristic artifacts (candy-wrapper, collapse effect on wrists and around bending joints) • Why? Vertices are transformed by linearly interpolated matrices (collapses near 180 degrees)

  5. Solutions • Avoiding such a dissimilar blending transformations (extra transformations that properly interpolates without collapsing • I.e. twisting wrists - extra joint that interpolates the rotation angle correctly • Could be used also for muscles, wrinkles and etc. • The key: since vertices choose weighted sums of transformations, if any linear scaling of an added joint is beneficial it may be used.

More Related