Vellum Constraint Features | John Lynch | H18 Masterclass

This masterclass will cover new Vellum constraint features in Houdini 18, some of which are workflow enhancements. This includes automatically computing mass and thickness based on density, making it easier to work with geometry of different resolutions. Normalizing stress computations over substeps, will save you the hassle of having to adjust threshold values when changing substeps. For the new constraint features, there are Stiffness Dropoff, Tangent Stiffness, Stitch to primitive location, Sliding for Stitch and Attach constraints, and ARAP constraints which are effective for simulating organic material/softbody and things that require good stretching and compression behaviour.

Download scene files here:

00:03:58 use autocomputation of mass+thickness
00:12:04 Normalize Stress Computations
00:17:14 Stiffness Dropoff with Stretch and Bend Constraints
00:21:41 Tangent Stiffness
00:27:26 Stitch Constraint Enhancements
00:32:32 Sliding Constraints
00:55:22 Triangle and Tetrahedral Stretch (ARAP) Constraints
01:11:01 ARAP Constraints (Shelf Tools)
01:17:41 Tetrahedral Stretch Constraints with Plasticity
01:20:35 ARAP Constraints for Organic Behaviour
01:22:44 Tetrahedral ARAP Constraints

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