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Constraint Property

tools/constraint-property·v1.3.0

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.

PAGEMap

Enable	Enablestiff	Enable modification of stiffness values.
[+]Stiffness Scale	Stiffscale	Scale factor for stiffness (powers of 10). Higher values create more rigid constraints.

PAGEConstraints

Stiffness

Stiffness

Multiplier for stiffness value.

PAGEMap

[+]Operation

Stiffop

How to apply the stiffness modification.

Enable

Enabledampratio

Enable modification of damping ratio values.

PAGEConstraints

Damping Ratio

Dampingratio

Damping ratio value (0-1). Higher values reduce oscillation.

[+]Operation

Dampratioop

How to apply the damping ratio modification.

PAGEConstraints

Rest Length Scale

Restlengthscale

Modify constraint rest length scale values.

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.

PAGEConstraints

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.

PAGEConstraints

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.

PAGEConstraints

Plastic Hardening

Plastichardening

Increase in stiffness as plastic deformation accumulates.

[+]Operation	Plastichardeningop	How to apply the plastic hardening modification.
Enable	Enablestiffmap	Enable attribute-based stiffness mapping.
[+]Stiffness Scale	Stiffscalemap	Scale factor for attribute-driven stiffness (powers of 10).

PAGEMap

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.

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