MCG LookAt Constraint

The MCG LookAt Constraint controls an object's orientation so that one axis points at another object, or the weighted average of other objects. Use this instead of the LookAt constraint for a slightly different set of controls, including a billboard option that restricts the rotation to a single world axis.

• Animation menu > MCG Controllers > MCG LookAt Constraint
• Assign Controller (object Rotation track) > MCG_lookAt

Interface

[target list]

Shows the targets and their relative weights.

Add Target

Click to select additional targets.

Remove Target

Select an object in the list, and then click this button to remove it.

Weights

To adjust the relative weight of a target:

1. Select the target in the list.
2. Adjust the numeric weight value.
3. Click Set.

To animate the weights, use Auto Key.

Rotation Offset

Offsets the rotation from the weighted average of the targets by the specified amounts in each axis.

Reset

Removes the offset, that is, sets each axis to 0.0.

Adjust

Allows you to set the offset by rotating the object interactively in the viewport.

Billboard Mode

Restricts the object's rotation to a single world axis. This is useful for orientating things like sprites that are being used for trees so that they face the camera but still point up.

When you activate this option, LookAt Axis changes to Billboard Axis and lets you select a world axis. The other alignment controls become unavailable.

LookAt Axis

The local axis used to point at the target.

Upnode Settings

Controls the object's roll around the LookAt axis. You can either align with the world or use the Upnode button to select an object in the scene.

Upnode Control

LookAt

Points the constrained object's Axis aligned to Upnode at the selected upnode.

Axis Alignment

Aligns the constrained object's Axis aligned to Upnode with the upnode's Source Axis.