Once you’ve created and edited cloth groups, the next step is to define dynamic properties for each of the dynamic groups in the currently selected cloth object. Dynamic properties control how the dynamic groups will move and behave when the dynamics are calculated.

The Cloth Dynamics Controls have the following buttons:

• Calculate Simulation: Clicking the Calculate Simulation button calculates the behavior of all of the cloth objects in the simulation for all of the specified frames.
• Play Simulation: Clicking the Play simulation button plays the currently selected simulation. If you don’t like the current behavior, you can alter any of the Cloth room settings and try again.
• Clear Simulation
: Clicking the Clear Simulation button empties all stored data in the current simulation. If you clear the simulation and play the animation, what you are seeing is simply keyframe animation with no simulation being calculated.

The Cloth room includes the following dynamics controls:

• Fold Resistance: The Fold Resistance parameter specifies the resistance to out-of-plane bending (folding).
• Shear Resistance: The Shear Resistance parameter controls the cloth’s resistance to in-plane shearing, or side-to-side bending.
• Stretch Resistance: The Stretch Resistance parameter specifies the cloth’s resistance to in-plane bending (stretching).
• Stretch Damping: The Stretch Damping parameter controls the internal energy loss caused by the motion of the cloth fibers against each other.
• Cloth Density: The Cloth Density parameter specifies the mass-per-unit area density of the cloth in grams per square centimeter.
• Cloth Self Friction: The Cloth Self Friction parameter sets the coefficient of friction between one part of the cloth and another, or how easily the cloth moves over itself.
• Static Friction: The Static Friction parameter sets the amount of friction between the cloth and solid objects.
• Dynamic Friction: The Dynamic Friction parameter sets the coefficient of friction between the cloth and solid objects when the cloth is in motion.
• Air Damping: The Air Damping parameter specifies the cloth’s air resistance that occurs whenever the cloth is moving through the air.
• Collision Friction: Checking the Collision Friction checkbox ignores the cloth object’s Static Friction and Dynamic Friction parameters, instead using those same parameters belonging to the collision objects themselves.
• Reset: Clicking the Reset button resets all Cloth room dynamics.

The label at the top right of the Cloth Dynamics Controls area displays the currently selected cloth object. To change the object, use the pull-down menu in the Cloth area (area 2).