> tools

Constraint Property

tools/constraint-property·v1.4.0

IN:3 OUT:3

SUMMARY

The Constraint Property operator modifies the properties of constraints after they are generated. It allows you to adjust stiffness, rest length, damping, and other constraint parameters dynamically. The operator can read values from geometry attributes to modulate these properties, enabling attribute-driven control over constraint behavior.

The Geometry page allows transforming the geometry which affects the constraints by recomputing properties like rest length. This is useful for fine-tuning constraint simulations by editing constraint attributes post-generation. You can selectively modify constraints based on groups, apply scaling factors, or use attribute data to create spatially-varying constraint properties.

PARAMETERS

PAGEGeometry

[+]Transform Order	Xord	Sets the overall transform order for the transformations.
[+]Rotate Order	Rord	Sets the order of the rotations within the overall transform order.
[+]Translate	T	Translate the points in the three axes.
[+]Rotate	R	Rotate the points around the corresponding X, Y and Z axes. Angles are given in degrees.
[+]Scale	S	Scale factor for each axis.
[+]Pivot	P	The pivot point for the transform rotates and scales.
Uniform Scale	Scale	Uniform scale multiplier applied to all axes.

PAGEConstraints

Constraint Group	Constraintgroup	Primitive group containing constraints to modify. Leave empty to modify all constraints.
Enable	Enablestiff	Enable modification of stiffness values.
[+]Stiffness Scale	Stiffscale	Scale factor for stiffness (powers of 10). Higher values create more rigid constraints.
Stiffness	Stiffness	Multiplier for stiffness value.
[+]Operation	Stiffop	How to apply the stiffness modification.
Enable	Enabledampratio	Enable modification of damping ratio values.
Damping Ratio	Dampingratio	Damping ratio value (0-1). Higher values reduce oscillation.
[+]Operation	Dampratioop	How to apply the damping ratio modification.
Enable	Enablerestscale	Enable modification of rest length scale values.
Rest Length Scale	Restscale	Multiplier for rest length. Values above 1.0 create pre-stretched constraints.
[+]Operation	Restscaleop	How to apply the rest length scale modification.
Enable	Enableplasticthreshold	Enable modification of plastic threshold values.
Plastic Threshold	Plasticthreshold	Strain threshold before plastic deformation begins.
[+]Operation	Plasticthresholdop	How to apply the plastic threshold modification.
Enable	Enableplasticrate	Enable modification of plastic rate values.
Plastic Rate	Plasticrate	Rate of plastic deformation per frame once threshold is exceeded.
[+]Operation	Plasticrateop	How to apply the plastic rate modification.
Enable	Enableplastichardening	Enable modification of plastic hardening values.
Plastic Hardening	Plastichardening	Increase in stiffness as plastic deformation accumulates.
[+]Operation	Plastichardeningop	How to apply the plastic hardening modification.

PAGEMap

Enable	Enablestiffmap	Enable attribute-based stiffness mapping.
[+]Stiffness Scale	Stiffscalemap	Scale factor for attribute-driven stiffness (powers of 10).
[+]Attribute	Stiffattr	Primitive attribute to modify stiffness with.
[+]Operation	Stiffopmap	How to modify stiffness with the attribute values.
Enable	Enabledampratiomap	Enable attribute-based damping ratio mapping.
[+]Attribute	Dampratioattr	Primitive attribute to modify damping ratio with.
[+]Operation	Dampratioopmap	How to modify damping ratio with the attribute values.
Enable	Enablerestscalemap	Enable attribute-based rest length scale mapping.
[+]Attribute	Restscaleattr	Primitive attribute to modify rest length scale with.
[+]Operation	Restscaleopmap	How to modify rest length scale with the attribute values.
Enable	Enableplasticthresholdmap	Enable attribute-based plastic threshold mapping.
[+]Attribute	Plasticthresholdattr	Primitive attribute to modify plastic threshold with.
[+]Operation	Plasticthresholdopmap	How to modify plastic threshold with the attribute values.
Enable	Enableplasticratemap	Enable attribute-based plastic rate mapping.
[+]Attribute	Plasticrateattr	Primitive attribute to modify plastic rate with.
[+]Operation	Plasticrateopmap	How to modify plastic rate with the attribute values.
Enable	Enableplastichardeningmap	Enable attribute-based plastic hardening mapping.
[+]Attribute	Plastichardeningattr	Primitive attribute to modify plastic hardening with.
[+]Operation	Plastichardeningopmap	How to modify plastic hardening with the attribute values.

PAGECommon

Free Extra GPU Memory

Freeextragpumem

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

INPUTS

Input 0 POP – Geometry

Input 1 POP – Constraints

Input 2 POP – Collision Geometry

OUTPUTS

Output 0 POP – Geometry

Output 1 POP – Constraints

Output 2 POP – Collision Geometry