tangentConstraint

Tangent Constraint Attributes

Lock Output

Specifies whether or not you can directly manipulate an object’s constrained channels. For example, when the tangent constraint’s Lock Output attribute is off, you can change the orientation of the constrained object to an orientation different from that of the driver curve.

When a constrained object’s Lock Output attribute is on, you can only manipulate its constrained channels by transforming its driver object. When a constrained object’s Lock Output attribute is off, you can directly manipulate its constrained channels, without having to transform its driver object.

Note

The Animation Blending preferences affect the default state of the Lock Output attribute.

Aim Vector

Specifies the direction of the aim vector relative to the constrained object’s local space. The aim vector aligns with the target vector, forcing the constrained object to orient itself accordingly. The default specifies that the object’s local rotation positive X-axis aligns with the aim vector, which aligns with the target vector (1.0000, 0.0000, 0.0000).

Up Vector

Specifies the direction of the up vector relative to the constrained object’s local space. The default specifies that the object’s local rotation positive Y-axis aligns with the up vector. In turn, by default, the up vector tries to align with the world up vector. Further, by default, the world up vector points in the direction of the world space’s positive Y-axis (0.0000, 1.0000, 0.0000).

If you define the up vector to point in the same direction as the aim vector, the constrained object will be motion history dependent. For more information, see Motion history dependence effects.

World Up Vector

Specifies the direction of the world up vector relative to the scene’s world space. Because Maya’s world space is “Y-up” by default, the default world up vector points in the direction of the world space’s positive Y-axis (0.0000, 1.0000, 0.0000).

World Up Object

Specifies that the up vector try to aim at the origin of a specified object instead of aligning with the world up vector. The world up vector is ignored. The object whose origin the up vector tries to aim at is called the world up object. You can specify the world up object with the aimConstraint MEL command (use -wuo flag). If no world up object is specified, the up vector tries to aim at the origin of the scene's world space.

Constraint Rotate

Displays the current orientation of the constrained object.

Constraint Vector

Informs you of the current target vector, which is what the aim vector aligns with.

Enable Rest Position

See Rest Position attributes.

Rest Rotate

See Rest Position attributes.