ParticleSystem

Defined in: src/systems/ParticleSystem.js:15

Manages particle state as well as the forces and constraints that act on its particles.

ParticleSystem( particles, iterations )

src/systems/ParticleSystem.js:15

particles Int | Array

Number of particles or array of initial particle positions
iterations Int

Number of constraint iterations per system tick

Methods
Properties

accumulateForces( delta ) private

src/systems/ParticleSystem.js:345

Accumulate forces acting on particles.

delta Float

Time step

addConstraint( constraint )

src/systems/ParticleSystem.js:226

Add a constraint

constraint Constraint

addForce( force )

src/systems/ParticleSystem.js:325

Add a force

force Force

addPinConstraint( constraint )

src/systems/ParticleSystem.js:246

Add a pin constraint. Although intended for instances of PointConstraint, this can be any type of constraint and will be resolved last in the relaxation loop.

constraint Constraint

create( ) static

src/systems/ParticleSystem.js:86

Create instance, accepts constructor arguments.

getAngle( a, b, c ) Float

src/systems/ParticleSystem.js:132

Alias for Vec3.angle. Calculates angle from positions.

a Int

Particle index
b Int

Particle index
c Int

Particle index

Returns: Float

Angle in radians

getDistance( a, b ) Float

src/systems/ParticleSystem.js:120

Alias for Vec3.getDistance. Calculates distance from positions.

a Int

Particle index
b Int

Particle index

Returns: Float

Distance

getPosition( i, out ) Vec3

src/systems/ParticleSystem.js:108

Alias for Vec3.copy. Copys vector from positions.

i Int

Particle index
out Vec3

Returns: Vec3

out

integrate( delta ) private

src/systems/ParticleSystem.js:192

Calculate particle's next position through Verlet integration. Called as part of tick.

delta Float

Time step

removeConstraint( constraint )

src/systems/ParticleSystem.js:236

Alias for Collection.removeAll. Remove all references to a constraint.

constraint Constraint

removeForce( force )

src/systems/ParticleSystem.js:335

Alias for Collection.removeAll. Remove all references to a force.

force Force

removePinConstraint( constraint )

src/systems/ParticleSystem.js:258

Alias for Collection.removeAll. Remove all references to a pin constraint.

constraint Constraint

satisfyConstraintGroup( group, [count], [itemSize] ) private

src/systems/ParticleSystem.js:292

Resolve a group of constraints.

group Array

List of constraints
[count] Int

Override for number of particles a constraint affects
[itemSize] Int

Override for particle index stride

satisfyConstraints( ) private

src/systems/ParticleSystem.js:268

Run relaxation loop, resolving constraints per defined iterations. Constraints are resolved in order by type: global, local, pin.

setPosition( i, x, y, z )

src/systems/ParticleSystem.js:94

Alias for Vec3.set. Sets vector of positions and positionsPrev.

i Int

Particle index
x Float
y Float
z Float

setWeight( i, w )

src/systems/ParticleSystem.js:145

Set a particle's mass

i Int

Particle index
w Float

Weight

tick( delta )

src/systems/ParticleSystem.js:369

Step simulation forward one frame. Applies forces, calculates particle positions, and resolves constraints.

delta Float

Time step

_count Int private

src/systems/ParticleSystem.js:71

Number of particles in system

_iterations Int private

src/systems/ParticleSystem.js:62

Number of constraint relaxation loop iterations

accumulatedForces Float32Array (Vec3)

src/systems/ParticleSystem.js:45

Accumulated forces currently acting on particles

positions Float32Array (Vec3)

src/systems/ParticleSystem.js:29

Current particle positions

positionsPrev Float32Array (Vec3)

src/systems/ParticleSystem.js:37

Previous particle positions

weights Float32Array (Float)

src/systems/ParticleSystem.js:53

Particle mass

Three Point Square ^0.3.3

ParticleSystem

Modules

Classes

ParticleSystem Methods

ParticleSystem Properties

Three Point Square 0.3.3

ParticleSystem

Modules

Classes

ParticleSystem Methods

ParticleSystem Properties

Three Point Square ^0.3.3