Facial Mocap (Motion Capture) with Apple’s iphone

Facial Motion Capture solutions without breaking the bank! Software overview for in house studio setup that are affordable and user friendly.

Houdini, Blender, Computer Graphics, ReallusionbubblepinsDecember 21, 2020houdini, sidefx, blender, mocap, facial mocap, motion capture, facial motion capture, reallusion, rokoko, faceware, iclone, UE4, UE, unreal engine, Unity, Apple, TrueDepth Camera, TrueDepth, blender addonsComment

Boolean Fracturing in Houdini

Boolean Fracture node automatically assigns unique names to each fractured piece and automatically sets up glue constraints for us. Here I show a demonstration on how to use the Boolean Fracture node for a simple dopnet simulation.

Houdini, Computer GraphicsbubblepinsFebruary 26, 2020houdini, sidefx, boolean logic, boolean fracturing, destruction sim, destruction simulation, houdini boolean, houdini boolean fracturing, houdini destruction, houdini simulation, houdini destruction glue, houdini boolean shatter, houdini edge displacement, houdini boolean nodeComment

Boolean Logic

Boolean logic is all about shape relationships. Cutting holes into a geometry with another geometry or combination of different geometrical shapes to create new shapes.

Animation Calculator

This calculator will compute the animation length (seconds) or the total number of frames you need. All you have to do is fill in 2 pieces of information. I hope this will help you make your scene setup a bit easier.

Computer Graphics, HoudinibubblepinsFebruary 25, 2020animation calculator, fps, frames per second, animation length, calculate animation length, total frames, houdini animation calculator, houdini fps, houdini animation Comments

Destruction Dust Pyro (Shelf Tool)

Here we demonstrate how to add dust pyro to the a previous Destruction scene that already contained Debri Particles to exaggerate the collision impact. Here we reuse the Debri Source points and convert it into a volume.

Destruction Debri Particles (Shelf Tool)

I demonstrate how to use the Shatter tool, RBD Glued Objects, and Debri Shelf Tools to create a destruction scene with a few mouse clicks.

Houdini, Computer GraphicsbubblepinsDecember 20, 2019houdini, sidefx, shelf tool, destruction, destruction simulation, destruction sim, debri particles, debri, hiplc, download Houdini projectComment

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

Calculating the Force Vector in a Force Field to Influence Destruction SIM in Houdini

Using two existing points that are used as vectors to derive a new force vector. Repeat this for every single point on a sphere geometry to create a force field that can be used to influence simulations.

Houdini, Computer GraphicsbubblepinsDecember 12, 2019houdini, sidefx, math vector, vector math, vector subtraction, points, point attribute, force vector, direction, vector directionComment

Controlling when to Break Glue Constraints in Houdini

Here I demonstrate how to animate the force field to produce a delay in the destruction of a fractured wall. This is a technique I used to produce some variation in the scene of the destruction of a fractured wall structure. The resulting visual effect has a huge hole that gets blasted through the wall and slowly destroys the rest of the wall pieces as the force field grows in its animation.

Houdini, Computer GraphicsbubblepinsDecember 11, 2019houdini, sidefx, destruction, glue constraints, destruction sim, delay destruction, force field, 3d animation, blenderComment

Calculating the Centroid Point of Geometry

How to calculate the centroid of a geometry? Math explanation behind $CEX $CEY $CEZ Houdini expression

Houdini, Computer GraphicsbubblepinsDecember 11, 2019houdini, sidefx, centroid, average, bounding box, bound, SOP context, VOPComment

Coordinate Positions are Vectors

Points can be formed into vectors. By knowing one point position and the origin position, using two points, a vector can be formed. This comes super handy in Houdini once we realize this. Vector manipulation can be used to influence simulations.

Computer Graphics, HoudinibubblepinsDecember 11, 2019houdini, sidefx, 3d coordinates, 2d coordinates, vector direction, points, vector manipulation, vector addition, vector subtraction, points are vectors Comment

Destroying Things with Force Fields in Houdini

Controlling destruction blast with additional geometry as a driver. Coding the force of the blast and augmenting the RBD (Rigid Body Dynamics) solver with custom made forces.

Houdini, Computer GraphicsbubblepinsDecember 11, 2019houdini, sidefx, destruction sim, destruction simulation, force field, control destructionComment

Basic RBD Scene Setup with Glue Constraints in Houdini

Demonstrates how to setup a simple basic RBD (rigid body dynamic) dopnet simulation scene in Houdini with glue constraints. The glue strength is adjusted to a level that withstands the gravity. This is a perfect starting point or template that can be used as a starting point before adding more complex forces.

Computer Graphics, HoudinibubblepinsDecember 11, 2019houdini, sidefx, rbd simulation, rbd sim, glue constraints, glue network, destruction sim, destruction simulation, basic destruction setupComment

Filtering Attributes by Value with Houdini Expressions

In this article, I explain how to filter geometry using attribute values. Houdini Expressions can be used to help debug and verify certain geometries. They help out with small tasks and can turn normal static functionality more dynamic and flexible with the use of logic.

Houdini, Computer GraphicsbubblepinsNovember 15, 2019houdini expression, houdini, sidefx, attribute name, assemble node, logicComment

Manually Creating Glue Constraints in Houdini

Constraints in Houdini define how a piece of geometry behave and how they move in the simulation when external forces are exerted upon them. Glue & Spring Constraints both behave differently in the simulation.

Houdini, Computer GraphicsbubblepinsNovember 15, 2019houdini, sidefx, glue constraints, destruction sim, destruction simulation, constraints, spring constraints, vellum constraints, constraint geometryComment

Destruction Glue Constraint in Houdini

Destruction Simulations are controlled by the way you fracture the geometry being destroyed and how the glue constraints are to be broken on impact. Check out this video, where I covered the basics of setting up a destruction simulation using glue constraints provided by the voronoi fracture and I covered some basic concepts for glue constraints, to understand some fundamentals.

Houdini, Computer GraphicsbubblepinsNovember 15, 2019houdini, sidefx, destruction sim, destruction simulation, glue constraints, spring constraints, constraintsComment

Water Simulation for Flowing Rivers

FLIP Simulation for Flowing Rivers Houdini Project File example provided with a Python Script to Auto Cook & Save File Caches

Computer Graphics, HoudinibubblepinsOctober 30, 2019houdini, sidefx, river, flip simulation, flip sim, file cache, python script, python, rock, noise, auto cook, automatically cook simulations, auto save file cacheComment

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

Normals in Geometry & Computer Graphics

Normals are vectors in computer graphics that define the exterior surface of a geometry and the direction the surface is facing. Normals may also be called “Surface Normals”, but usually are referred as “normals”, are used in 3D applications to help render the polygon on the screen by distinguishing the front and back side of each primitive.

Computer Graphics, Houdini, BlenderbubblepinsOctober 28, 2019houdini, sidefx, normals, blender, vector, surface normalComment

Destruction Sim in Houdini

Destruction simulation Houdini Project example files available for download

Computer Graphics, HoudinibubblepinsOctober 18, 2019houdini, sidefx, hiplc, download examples, download Houdini project, destruction sim, destruction simulation, tutorial videosComment

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