## SIApplyCns

### Description

Constrains an object to one or more constraining objects. Constraints are placed under the kinematics property of the constrained object. SIApplyCns differs from ApplyCns in that it does not display the constraint's property page.

### Scripting Syntax

    oReturn = SIApplyCns( PresetObj, [ConstrainedObj], [ConstrainingObj], [Compensation] );

### Return Value

Returns an XSICollection of Constraint objects.

### Parameters

Parameter | Type | Description
--- | --- | ---
PresetObj | String or a preset object (see SIGetPreset) | Constraint preset. Warning: The preset name is case-sensitive on Linux.
ConstrainedObj | String | List of objects to be constrained. If you pass in a variable, the command returns a XSICollection of the constrained X3DObjects. Default Value: Selected objects
ConstrainingObj | String | List of constraining objects. If you pass in a variable, the command returns a XSICollection of the constraining X3DObjects. Default Value: User is prompted to pick
Compensation | Boolean | True to turn on compensation Default Value: False

### Examples

#### VBScript Example

    '
    ' Orientation constrain two cones to a cube, compensating one of them.
    '
    dim oCube, oConeCompensated, oConeUncompensated
    '
    ' get a cube and rotate it so we can see how orientation is being constrained.
    '
    set oCube = GetPrim("Cube")
    oCube.length = 2
    Scale oCube, 0.5, 3, 0.5, siRelative, siLocal, siObj, siXYZ
    Rotate oCube, 45, 0, 45, siRelative, siAdd, siObj, siXYZ
    '
    ' create the two cones and put on either side of the cube
    '
    set oConeCompensated = GetPrim("Cone")
    Translate oConeCompensated, -4, 0, 0, siAbsolute, siParent, siObj, siXYZ
    set oConeUncompensated = GetPrim("Cone")
    Translate oConeUncompensated, 4, 0, 0, siAbsolute, siParent, siObj, siXYZ
    '
    ' Apply the constraints
    '
    SIApplyCns "Orientation", oConeCompensated, oCube, true
    SIApplyCns "Orientation", oConeUncompensated, oCube, false
    '
    ' display the constraint relationship in the camera view
    '
    SetValue "Camera.camvis.*constraint*", True
    '
    ' log the constraint offsets to show
    ' that one has been compensated
    '
    dim comp_x,comp_y,comp_z,uncomp_x,uncomp_y,uncomp_z
    comp_x = GetValue( oConeCompensated&".kine.oricns.offx")
    comp_y = GetValue( oConeCompensated&".kine.oricns.offy")
    comp_z = GetValue( oConeCompensated&".kine.oricns.offz")
    uncomp_x = GetValue( oConeUncompensated&".kine.oricns.offx")
    uncomp_y = GetValue( oConeUncompensated&".kine.oricns.offy")
    uncomp_z = GetValue( oConeUncompensated&".kine.oricns.offz")
    logmessage "Compensated cone offsets:   x= " & comp_x   & " y= " & comp_y   & " z= " & comp_z
    logmessage "Uncompensated cone offsets: x= " & uncomp_x & " y= " & uncomp_y & " z= " & uncomp_z
    'Results of running this script:
    'INFO : "Compensated cone offsets:   x= -35.2643896827547 y= -30 z= -35.2643896827547"
    'INFO : "Uncompensated cone offsets: x= 0 y= 0 z= 0"

### See Also

SIApplyConstraint RemoveAllCns RemoveCns