Surface Constraint Property Editor

| Surface | Tangency | Normal

Constrains an object so that its displacement is based on the surface U/V parametric values of the constraining NURBS surface object.

For more information, see Surface and Curve Constraints [ Animation ].

To apply: Select an object, Constrain Surface, then pick the NURBS surface object to which the selected object will be constrained.

To redisplay: Select the constrained object, choose Explore Constraints on the MCP, and click the constraint's icon.

Surface

Active	Toggles the activeness of this constraint.
Blend Weight	Blends the weight of this constraint with other constraints on the selected object.
U Location	Positions the constrained object along the constraining object's U coordinate.
V Location	Positions the constrained object along the constraining object's V coordinate.

Attach Point -- Constrained Object

Affected by Orientation	Constrained object is affected by the orientation of the constraining object.
Affected by Scaling	Constrained object is affected by the scale of the constraining object.
X/Y/Z	Sets the offset distance in global space on the X/Y/Z axes of the constrained object in relation to the constraining object. If you add an offset, you can set the Coupling to either soft or rigid.
Coupling	Determines how constrained object move in relation to the constraining object when there is an offset between them (set with the X/Y/Z sliders). When the offsets for both the constrained and constraining objects are set to zero (off), the coupling has no effect. Rigid: The constrained object mimics the rotation of the constraining object. Rigid constraints are represented by a small square in the center of the constraining object. Soft: The constrained object is allowed a certain degree of flexibility in relation to the constraining object, similar in nature to a ball joint. Soft constraints are represented by a small circle in the centers of the constrained and constraining objects.

Tangency

Active

Toggles the activeness of the tangency values set for this constraint.

Axis to Align

X/Y/Z

Sets the axis of the constrained object that will always face the slope of the constraining surface. You can either click the axis buttons (positive and negative X, Y, Z) or enter 1 or -1 in the axis text boxes.

Normal

Active	Toggles the activeness of the up vector applied to the normals of the constrained object.
Roll	Sets the roll value of the up vector.

Affected Axis

X/Y/Z

Sets which axis of the constrained object is to be the one used as the up vector (Y is the default). You can either click the axis buttons (positive and negative X, Y, Z) or enter 1 or -1 in the axis text boxes.