.. _sec-zCloth:

zCloth
------
This node specifies cloth-specific attributes.

+----------------------------+------------------------------------------------------------------------------------------------------+
| Attribute                  | Meaning                                                                                              |
|                            |                                                                                                      |
+============================+======================================================================================================+
| **enable**                 | When disabled, removes this cloth and affiliated attachments from the solve.                         |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **materialType**           | The cloth uses a proprietary Ziva cloth model.                                                       |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **bendRestAngle**          | Controls whether the neutral angle for the bending is the angle in the input mesh,                   |
|                            | or the zero angle.                                                                                   |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **restScaleEnvelope**      | Modulates the effect of zMaterial.restScale.                                                         |
|                            | When envelope is zero, restScale has no effect.                                                      |
|                            | When restScaleEnvelope is negative, the effect inverts -                                             |
|                            | causing objects to grow instead of shrink, or vice versa.                                            |
|                            | This attribute is keyable, unlike zMaterial.restScale.                                               |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **pressureEnvelope**       | Multiplies the pressure force from zMaterial.pressure.                                               |
|                            | This attribute is keyable, unlike zMaterial.pressure.                                                |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **surfaceTensionEnvelope** | Multiplies the surface tension force from zMaterial.surfaceTension.                                  |
|                            | This attribute is keyable, unlike zMaterial.surfaceTension.                                          |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **inertialDamping**        | Inertial damping is a non-physical effect useful to enhance stability or handle non-physical inputs. |
|                            | It prevents issues from 'feeling' inertia due to large-scale motions.                                |
|                            | Small-scale deformations still have all of their inertia,                                            |
|                            | so elastic waves travel through objects normally.                                                    |
|                            | Using this, cloth can be subjected to extreme acceleration without tearing themselves apart.         |
|                            | This is very different from the mass and stiffness damping available on the zSolver node.            |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **collisions**             | Enables collision detection and response with this cloth.                                            |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **selfCollisions**         | Cloth does not support self collisions, this attribute is ignored.                                   |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **collisionSets**          | Only objects that have a shared collision set will collide with this cloth.                          |
|                            | Collision sets are denoted by integers,                                                              |
|                            | with all collidable objects initialized inside collision set 0.                                      |
|                            | An empty collision set is equivalent to turning collisions off.                                      |
|                            | Objects may belong to multiple collision sets.                                                       |
|                            | Add multiple collision set integers by separating each integer with a space.                         |
|                            | E.g. To place an object inside collision sets 1, 4 and 5, use "1 4 5".                               |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **contactStiffness**       | The stiffness of "contact" springs.                                                                  |
|                            | It controls the "hardness" of the contact between the two objects.                                   |
|                            | Lower values may cause intersections to occur during contact, but will be more stable.               |
|                            | Higher values will cause little or no intersection,                                                  |
|                            | but may require more solver substeps to be stable.                                                   |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **contactStiffnessExp**    | The power to which the value of the **"contactStiffness"** is raised.                                |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **contactSliding**         | When enabled, contacts are resolved with the freedom to slide tangentially. Both bodies              |
|                            | in contact need to have **contactSliding** enabled for this to take effect.                          |
+----------------------------+------------------------------------------------------------------------------------------------------+
| **fields**                 | Maya fields that affect this cloth (for external forces).                                            |
+----------------------------+------------------------------------------------------------------------------------------------------+

Same comments on the interaction among multiple bodies apply as with the zTissue node.