COGConstraint (hwx.inspire.core)

Create the Center of Gravity Constraint (COG) of supplied parts.

Use the Center of Gravity Constraint (COG) to apply, reposition, and set upper and lower bounds for a center of gravity constraint. COG constraints are used to limit the position of the center of gravity while running a topology optimization.


active: Bool color: Color connectionRadius: Double
connectionType: Enum direction: Direction distributed: Bool
features: Attribute localToPart: Bool location: Location
mode: Enum name: Attribute part: Attribute
parts: Attribute visible: Bool  


Attribute Details

active : Bool

Returns or sets the object activeness.

Setting this on or off sets all children. Setting to True sets all the parents active too.

color : Color

The color assigned to the Boundary Condition.

connectionRadius : Double (units=”length”)

The search radius for the Boundary Condition.

connectionType : Enum (rigid, flexible)

The type of the connection. Valid choices are:

  • rigid
  • flexible

direction : Direction

Returns the direction vector of the entity.

distributed : Bool

Returns whether the applied boundary condition is distributed or not.

Boundary conditions applied across the entire feature area (for faces) or length (for edges) are distributed and at a single point boundary conditions are non-distributed.

features : Attribute

Returns a list of features the entity is applied to.

localToPart : Bool

Returns or sets ‘Rotate with part’.

It makes boundary condition not to rotate or rotate along with its associated part.

location : Location (units=”length”)

Returns the location of the entity.

mode : Enum (direction, components)

Specifies the mode of the boundary condition.

Valid choices are:

  • direction
  • components

name : Attribute

Returns or sets the name of the object.

It can be any text string, including spaces, although it’s best to avoid using the following characters: ” ‘ * ? and $.

While these characters are allowed, they could create difficulties when you export the model to other applications.

part : Attribute

Returns the part on which the entity is applied graphically.

parts : Attribute

Returns a list of parts on which the entity is applied on.

visible : Bool

Determines whether the Boundary Condition is visible or not.

Property Details


A list of the lower and upper bound values in X, Y and Z directions for COG during optimization, defaults to [-0.1, 0.1, -0.1, 0.1, -0.1, 0.1]. If None is specified in a position (e.g. [None, -0.1, None, None, None, None]) then this direction is inactive.


A Matrix44 of X, Y and Z directions of COG and the current position, defaults to math.Matrix44(origin=getCenterOfGravity(ents))