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Strange Attractors

simulations/strange-attractors·v1.5.1

IN:1 OUT:1

SUMMARY

The Strange Attractors operator maps each point into the space of a chosen attractor, integrates it through the system's equations and maps it back, so points swirl onto the attractor's shape and keep flowing. Ten systems are built in with their usual coefficients, center, scale and rate, and Custom takes your own equations from a DAT.

Simple mode leaves P alone and sets PartVel to the attractor velocity for a particle system downstream, while Advect moves the points in a feedback loop (Initialize, Start, Play) with a Target Feedback Loop POP for forces downstream. Respawn restarts points that leave the Respawn Radius, and the Bounds page keeps points inside a box.

PARAMETERS

PAGEStrange Attractors

[+]Solver Mode	Solvermode	Simple sets PartVel to the attractor velocity each frame for a particle system downstream. Advect moves the points in a feedback loop.
Target Feedback Loop POP	Targetpop	A reference to a POP node downstream in the network whose data is retrieved one frame later. P and PartVel are read back.
[+]Strange Attractor	Strangeattractor	Selects the system of equations the points follow and loads its usual coefficients, center, scale and rate. Custom uses the Custom Attractor DAT.
Custom Attractor DAT	Customsa	Sets the DAT holding the custom attractor function, which returns how fast a point moves along each axis.
Generate Custom DAT	Generatedat	Copies a Custom Attractor DAT template (the Lorenz system) next to the operator and selects it.
Coefficient A	Coeffa	Sets coefficient A of the equations. Set by the chosen attractor, editable with Custom.
Coefficient B	Coeffb	Sets coefficient B of the equations. Set by the chosen attractor, editable with Custom.
Coefficient C	Coeffc	Sets coefficient C of the equations. Set by the chosen attractor, editable with Custom.
Coefficient D	Coeffd	Sets coefficient D of the equations. Set by the chosen attractor, editable with Custom.
Coefficient E	Coeffe	Sets coefficient E of the equations. Set by the chosen attractor, editable with Custom.
Coefficient F	Coefff	Sets coefficient F of the equations. Set by the chosen attractor, editable with Custom.
[+]Center	Center	The point of the attractor placed at the origin, in its own units. Set by the chosen attractor; editable with Custom.
Scale	Attractorscale	Scales the attractor to world units. Set by the chosen attractor, editable with Custom.
Rate	Rate	Sets the attractor time per second. Set by the chosen attractor, editable with Custom.
Time Scale	Timescale	Speed multiplier on the time step. 0 freezes and 2 doubles.
Time Step	Timestep	The time step per frame in seconds, 1 divided by the cook rate (read-only). Time Scale multiplies it.
Substeps	Substeps	RK4 integration steps per 1/60 second (more per frame below 60 FPS, so each step keeps its length). More substeps follow the attractor more accurately.
Respawn	Respawn	In Advect mode, a point that leaves the Respawn Radius or blows up restarts from its input position.
Respawn Radius	Respawnradius	Sets the distance from the origin, in world units, past which a point respawns.
Initialize	Initializepulse	Initializes the POP from its input and parameters.
Start	Startpulse	Start the simulation from the initialized state.
Play	Play	Pause or play the feedback loop.
Step	Steppulse	Advance the simulation by one frame while paused.

PAGEBounds

[+]Limit Type Minimum	Mintype	Determines how the points are kept above the minimum bound on this axis, as in the Limit POP. Off disables it.
[+]Limit Type Maximum	Maxtype	Determines how the points are kept below the maximum bound on this axis, as in the Limit POP. Off disables it.
Minimum Value	Min	Sets the minimum bound on this axis, in world units.
Maximum Value	Max	Sets the maximum bound on this axis, in world units.

PAGECommon

Free Extra GPU Memory

Freeextragpumem

Free memory that has accumulated when output memory has grown and shrunk.

INPUTS

Input 0 POP - Particles In

OUTPUTS

Output 0 POP - Particles Out