FixXConstraint

FixXConstraint(xCoordinate: float, dofs: List[int], tol: float = 1e-10)

Bases: SPConstraint

Coordinate-based boundary constraint along a constant X plane.

FixXConstraint constrains selected degrees of freedom for all nodes sharing a specific X coordinate within a given tolerance. It applies boundary conditions to planar boundaries in 2D or 3D models without requiring manual node tag lookup.

Tcl form

fixX <xCoordinate> <dof1> <dof2> ... -tol <tol>

Example

from femora.core.model import Model

model = Model()
# Fix X and Y DOFs of all nodes on the X=0.0 plane
constraint = model.constraint.sp.fix_x(
    xCoordinate=0.0,
    dofs=[1, 1, 0],
    tol=1e-5,
)

Create an X-coordinate plane constraint.

Parameters:

Name	Type	Description	Default
`xCoordinate`	`float`	X-coordinate of nodes to be constrained.	required
`dofs`	`List[int]`	List of DOF constraint states. 0 indicates unconstrained (free). 1 indicates constrained (fixed).	required
`tol`	`float`	Tolerance for coordinate comparison.	`1e-10`