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Composition


Decomposition

Engine


Setup

Flex Parameters from values

Set environmental parameters for your simulation. Specify them here.

Inputs

Name	ID	Description	Type
Gravity	Gravity	Constant acceleration vector applied to all particles.	Vector
Radius	Radius	The maximum interaction radius for particles.	Number
Solid Rest Distance	SolidRestDistance	The distance non-fluid particles attempt to maintain from each other, must be in the range (0,.	Number
Fluid Rest Distance	FluidRestDistance	The distance fluid particles are spaced at the rest density, must be in the range (0, radius], for fluids this should generally be 50-70% of Radius, for rigids this can simply be the same as the particle radius.	Number
Collision Distance	CollisionDistance	Distance particles maintain against shapes, note that for robust collision against triangle meshes this distance should be greater than zero.	Number
Particle Collision Margin	ParticleCollisionMargin	Increases the radius used during neighbor finding, this is useful if particles are expected to move significantly during a single step to ensure contacts aren't missed on subsequent iterations.	Number
Shape Collision Margin	ShapeCollisionMargin	Increases the radius used during contact finding against kinematic shapes.	Number
Max Speed	MaxSpeed	The magnitude of particle velocity will be clamped to this value at the end of each step.	Number
Max Acceleration	MaxAcceleration	The magnitude of particle acceleration will be clamped to this value at the end of each step (limits max velocity change per-second), useful to avoid popping due to large interpenetrations.	Number
Dynamic Friction	DynamicFriction	Coefficient of friction used when colliding against shapes.	Number
Static Friction	StaticFriction	Coefficient of static friction used when colliding against shapes.	Number
Particle Friction	ParticleFriction	Coefficient of friction used when colliding particles.	Number
Restitution	Restitution	Coefficient of restitution used when colliding against shapes, particle collisions are always inelastic.	Number
Adhesion	Adhesion	Controls how strongly particles stick to surfaces they hit, default 0.0, range [0.0, +inf].	Number
Sleep Threshold	SleepThreshold	Particles with a velocity magnitude < this threshold will be considered fixed.	Number
Shock Propagation	ShockPropagation	Artificially decrease the mass of particles based on height from a fixed reference point, this makes stacks and piles converge faster.	Number
Dissipation	Dissipation	Damps particle velocity based on how many particle contacts it has.	Number
Damping	Damping	Viscous drag force, applies a force proportional, and opposite to the particle velocity.	Number
Fluid	Fluid	If true then particles with group index 0 are considered fluid particles and interact using the position based fluids method.	Boolean
Viscosity	Viscosity	Smoothes particle velocities using XSPH viscosity.	Number
Cohesion	Cohesion	Control how strongly particles hold each other together, default: 0.025, range [0.0, +inf].	Number
Surface Tension	SurfaceTension	Controls how strongly particles attempt to minimize surface area, default: 0.0, range: [0.0, +inf].	Number
Solid Pressure	SolidPressure	Add pressure from solid surfaces to particles.	Number
Free Surface Drag	FreeSurfaceDrag	Drag force applied to boundary fluid particles.	Number
Buoyancy	Buoyancy	Gravity is scaled by this value for fluid particles.	Number
Plastic Threshold	PlasticThreshold	Particles belonging to rigid shapes that move with a position delta magnitude > threshold will be permanently deformed in the rest pose.	Number
Plastic Creep	PlasticCreep	Controls the rate at which particles in the rest pose are deformed for particles passing the deformation threshold.	Number
Wind	Wind	Constant acceleration applied to particles that belong to cloth and inflatables, drag needs to be > 0 for wind to affect triangles.	Vector
Drag	Drag	Drag force applied to particles belonging to cloth and inflatables, proportional to velocity^2*area in the negative velocity direction.	Number
Lift	Lift	Lift force applied to particles belonging to cloth and inflatables, proportional to velocity^2*area in the direction perpendicular to velocity and (if possible), parallel to the plane normal.	Number
Relaxation Mode	Relaxation Mode	How the relaxation is applied inside the solver. If false, the relaxation factor is a fixed multiplier on each constraint's position delta. If true, the relaxation factor is a fixed multiplier on each constraint's delta divided by the particle's constraint count, convergence will be slower but more reliable.	Boolean
Relaxation Factor	RelaxationFactor	Control the convergence rate of the parallel solver, default: 1, values greater than 1 may lead to instability.	Number

Outputs

Name	ID	Description	Type
FlexParams	Params	FlexParams object to be passed into the engine.	Generic Data

Flex Parameters from values

Set environmental parameters for your simulation. Specify them here.

Inputs

Outputs

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