> modifiers

Force

modifiers/force·v1.5.1

IN:1 OUT:1

SUMMARY

The Force operator sums all forces at each point's position and writes the result to PartForce (or another Output Attribute), adding to the incoming value or replacing it. Force types include Radial, Directional, Vortex, Tornado, Planar, Line, Turbulence (curl noise), Drag and Spring, each with a viewport guide.

A distance falloff (Linear, Smooth or Inverse Distance) and an optional POPX falloff attribute shape where the force acts, and a Specification POP turns each of its points into a separate force with per-point overrides. Place it before a Particle POP target or inside a simulation's feedback loop; Rotate to Force can also turn POPX instances along their force.

PARAMETERS

PAGEForce

Group	Group	If there are input groups, specifying a group name in this field will cause this POP to act only upon the group specified.
Specification POP	Specpop	Reference to a POP where each point is a specification defining a separate force.
[+]Force Type	Type	Selects the type of force applied to the points.
Display Force	Displayforce	When enabled, renders a guide of each force in the viewport for reference.
[+]Display Color	Displaycolor	Color used to display the guides when Display Guide is enabled.
Strength	Strength	Force magnitude. Negative values reverse the force direction.
[+]Center	Center	Sets the center position of the force.
[+]Direction	Dir	Sets the direction, axis or plane normal of the force, depending on the Force Type.
Length	Length	Length of the force axis for Vortex, Tornado and Line. 0 makes the axis infinite.
Lift	Lift	Sets the strength of the Tornado force along its axis, relative to Strength.
Inward	Inward	Sets the strength of the Tornado pull toward its axis, relative to Strength.
Seed	Seed	Numerical value that initializes the randomization.
Period	Period	Period (scale) of the turbulence noise.
Time	Time	Moves the turbulence noise through its 4th dimension. Animate it, for example with absTime.seconds, to evolve the turbulence.
Output Attribute	Outputattr	Name of the attribute where the force is stored.
[+]Combine Operation	Combine	Whether the force is added to the existing attribute or replaces it.
Clamp Force	Clampforce	Limits the length of the resulting force vector.
Max Force	Maxforce	Maximum length of the force vector when Clamp Force is enabled.
Rotate to Force	Rotatetoforce	Turns the +Z axis of each POPX instance along its force (up +Y). Positions are unchanged.

PAGEFalloff

[+]Falloff	Fallofftype	Sets the falloff type on the forces.
Radius	Radius	The radius of the falloff. Also sets the guide size.
Inner Radius	Innerradius	Distance up to which the Linear and Smooth falloff stays at full strength.
Exponent	Exponent	Sets the exponent on the falloff curve.
Near Limit	Nearlimit	The near-range limit of the Inverse Distance falloff.
Do Falloff	Dofalloff	Weight the effect on each point by the Falloff Attribute.
Falloff Attribute	Falloffattr	The point attribute, 0 to 1, that weights the effect.

PAGECommon

Bypass	Bypass	Pass through the first input to the output unchanged.
Free Extra GPU Memory	Freeextragpumem	Free memory that has accumulated when output memory has grown and shrunk.
Render Primitives	Renderprimitives	Whether to render the full POPX geometry. When off, only point instances are drawn.
Convert to Point Primitives	Converttoptprim	Enable converting points to point primitives when Render Primitives is off.
SRT / RST	Srtrst	Sets the transform order, SRT or RST, used when the points are rendered as TouchDesigner instances.

INPUTS

Input 0 POP - POPX/POP Geometry

OUTPUTS

Output 0 POP - POPX/POP Geometry