Detecting Collision on Impact

Debri Source node detects the collision impact on a fractured geometry and creates emission points that will be the source points for a particle simulation, which can be rendered as Debri particles.

Houdini, Computer GraphicsbubblepinsDecember 20, 2019houdini, sidefx, collision detect, collision, impact, debri particles, closest point, fractured geometry, fractured pieces, impact points Comments

Vellum Sim & RBD Sim Interactions

Having Vellum simulations work with other types of simulations can require some creativity. The multisolver didn’t work with the Vellum solver. I started tinkering with different ways to mix the Vellum solver with a simple RBD simulation setup and came up with a multiple phase workflow to create a more realistic Vellum cloth dynamics with the RBD simulation.

Houdini, Computer GraphicsbubblepinsOctober 28, 2019houdini, sidefx, vellum, vellum sim, vellum & rbd, vellum & rbd interact, collision, phase workflow, realistic vellum rbd sim Comment

RBD vs Bullet Solver in Houdini

Bullet Solver vs RBD Solver, comparison between the two and how to choose between the two. The Rigid Body solver has the option to choose between using the Bullet solver engine or RBD solver engine to calculate the dynamics of the simulation.

Computer Graphics, HoudinibubblepinsOctober 18, 2019houdini, sidefx, rbd, rigid body dynamics, rbd sim, rbd simulation, bullet solver, rbd solver, rbd vs bullet, proxy volume, collision Comments

SDF (Signed Distance Field) used to Detect Overlapping Objects

SDF is short for signed distance field and describes the interior volume of an object. How thick an object is from the middle to the surface? How deep does the cylinder extend? From any point inside an object, using the SDF, it is possible to easily grab the distance to the surface of the object in order to know the depth.

Computer Graphics, HoudinibubblepinsSeptember 22, 2019houdini, sidefx, sdf, signed distance field, volume, distance, collision, collision detect, overlap, SDF Value Comments

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