Manual Modules MOCCA Soft IK / Bones MOCCA IK Tag
MOCCA IK Tag Basic Tag Constraint Limit RestRest
Using the parameters on this page, you can control the rest position and rotation of each joint to which the character will return when the constraints are either inactive or reduced.
This page is shown only if Anchor is disabled on the Tag Properties page.
These settings define a rest position and rotation — a space to which the IK chain will return when the other constraints are inactive.
Imagine a character that is pulled with great force from her original position. The acceleration will cause her to stretch in the opposite direction of the pull. As soon as the acceleration reduces, she will try to assume her initial pose (provided that no other constraints prevent her from doing so). The Rest settings allow you to define this initial pose.
If this option is enabled, the bones remain in contact, i.e. there will be no gaps between the bones, even if the tip effector has not been reached.
If Force Position disabled, the bones will be stretched apart as they try to reach the tip effector.
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| Force Position enabled. Although the tip effector has not been reached, there are no gaps between the bones. |
Clicking this button will cause the IK chain to return to its predefined rest position and rest rotation. Since you will probably have other active constraints in the scene preventing this, the Use IK option will automatically be turned off at the root bone.
Pos [XYZ m]<ID IK_MIDPOS_STRENGTH> Strength <ID IK_SETMIDPOS> Set
These values define the initial rest position for the IK chain. You can set them by moving the chain into the position you want and pressing Set or the Set Chain Rest Position icon on the MOCCA palette.
The Strength setting regulates the strength at which the rest position will interact with other forces. The higher the value, the greater the influence of the rest position on the character.
Strength [0..100%] Rot [HRB °] Set
These settings define the initial rest rotation of the IK chain when no other constraints are active. You can set them by arranging the chain as you want and pressing Set or the Set Chain Rest Rotation icon on the MOCCA palette.
If you have set a rest position for the arm, which also has a tip effector connected to it, the chain will try to find a common denominator for both forces. If you try to pull the arm away from its rest position with a goal constraint, you will have to use more force than if you hadn’t used rest rotation. Eliminating the goal constraint will cause the chain to return to its rest rotation immediately. This form of constraint should be preferred to the classical rotation limit, since it allows for more natural movements with less strict prohibited spaces to which the chain can move.
The Strength setting controls the strength at which the rest rotation interacts with other forces. The higher the value, the greater the influence of the rest rotation on the character.