Twist Poses Rollout

The toolset of this rollout lets you create and edit twist poses for a biped's limbs.

• Select a biped. > Motion panel > Twist Poses rollout

You can either use the rollout's preset poses (which you can modify and rename), or create your own. When you add a new pose, you establish a reference between the selected's limb relative orientation and the rollout's Twist value of 0 (which means no twist). When more than one reference pose are set for a rotated limb, the limb's twisting is calculated based on the nearest pose.

Tip: It is suggested that you add twist poses for all major limb rotated poses. This ensures that rotating your biped's limb produces well-calibrated twisting.

Note: You don't technically have to enable twist links to use the Twist Poses rollout toolset. However, if your biped does not contain twist links, the Twist and Bias settings are not used.

The Twist Poses rollout tools only affect limbs with three degrees of freedom (DOF), such as upper arms and thighs, because you can control their twist links by rotating them. Two-DOF limbs (forearms and calves, for instance) differ due to the fact that you can only control their twist links if you rotate their child limb.

The upper arm can twist itself while the forearm needs the wrist to twist it.

Note: If you select a two-DOF limb, the only available setting is the Bias value; you can change it to adjust the rotation distribution along the twist links.

Procedures

Example: To Add and Edit Twist Poses:

This procedure takes into account the concept of adding twist links to biped limbs and concentrates on using the tools from the Twist Poses rollout to set up basic poses.

1. Prepare a biped with five twist links on each upper arm.
   Tip: You can use See-Through on the biped's limbs to better distinguish the twist links inside.

   
2. Exit (Figure Mode), and then expand the Twist Poses rollout.
3. Select the right upper arm.

   The rollout controls are enabled because you selected a three-DOF limb.

4. Use (Previous Key) and (Next Key) to cycle through the different pose presets.
   Tip: You can often use these presets as a starting point for posing your limbs.
5. Choose pose6 from the drop-down list.

   The biped's arm extends upwards and shows some twisting.

   
6. Click Set.

   This assigns the Twist value of 0 to the upper arm's twist links.

   Note: A twist change is always reflected on both sides (in this case, both upper arms).
7. Rotate the upper arm locally around its Y axis so it extends to the side.
   
8. Click Add to create a new pose. Rename it Arm At Side.

   This new pose resets the current Twist value of the twist links.

9. Rotate the upper arm locally around its X axis.

   The twisting in the upper arm is calculated based on the limb's proximity to the saved poses.

   

   Rotate the upper arm to verify the twist links.

Interface

Previous/Next Key

Scrolls and selects through the list of twist poses.

Twist Poses List

Lets you choose a preset or saved pose to apply to the biped's selected limb. By default, five twist poses are available for each three-DOF limb: Up, front, lateral, down, and back. You can also rename the current twist pose.

Twist

Sets the amount of twist rotation (in degrees) applied to the twist links linked to the selected limb. The twist links from the opposite side are so affected. Default=0. Range=–180 to 180.

Note: Changing the Twist value automatically resets the current limb's orientation to the active twist pose.

Bias

Sets the distribution of rotation along the twist links. A setting of 1.0 concentrates the twist towards the top link while a setting of 0.0 instead concentrates it towards the bottom link. The default setting is 0.5, distributing the rotation evenly throughout the links. The twist links from the opposite side are so affected.

Note: Changing the Bias value automatically resets the current limb's orientation to the active twist pose.

Note: You can also set a Bias value for Two-DOF limbs.

Add

Creates a new twist pose based on the selected limb's orientation and resets Twist and Bias to their default values.

Note: Adding a new pose for one limb automatically makes it available for the limb on the opposite side.

Set

Updates the active twist pose with the current Twist and Bias values.

Delete

Removes the current twist pose.

Default

Replaces all twist poses of all three-DOF limbs with five default preset poses.