Cloth

cpProperty

These are the attributes in the cpProperty node.(Simulation > Properties > cpProperty > ) For more information, see Apply properties to panels and Vertex level cloth properties.

Property Attributes

These are the attributes in the Property Attributes section of the cpProperty node.

The slider ranges for the Property Attributes represent values for realistic cloth. To enter values that exceed the default slider range (and create unrealistic cloth effects), type them in the boxes or -drag in the boxes to use the virtual sliders.

U/V Bend Resistance

Controls how much the cloth resists bending in the U and V directions. The greater the U/V Bend Resistance value, the stiffer the cloth. Lower values create very flexible cloth. The default is 10.

U/V Bend Rate

The U/V Bend Resistance may increase non-linearly as the cloth triangles are folded from 0 degrees to 180 degrees. The U/V Bend Rate attribute controls the exponent of how much the U/V Bend Resistance increases from 0 to 180 degrees.

A U/V Bend Rate of 0 means a constant resistance. A U/V Bend Rate of 1 means that at 180 degrees, the bending resistance is so high that it will not bend without a huge amount of force. The default is 0.

U/V Stretch Resistance

Controls how much the cloth resists stretching in the U and V directions. The greater the value, the more the cloth resists stretching. A value of 100 is very stiff cloth and a value of 1 is very stretchy. The default is 50. A value greater than 0 is recommended.

Shear Resistance

Controls how much individual triangles resist moving in an opposite but parallel sliding motion. The higher the number, the less the triangles can shear. The default is 45. A value greater than 0 is recommended.

U/V Scale

Controls the scale of the cloth in the U and V directions.

Values of 2 in the U and V Scale make the cloth object twice its actual size. Values of 0.5 in the U and V Scale make the panel half its actual the size. The default is 1.

Density

Controls the mass per unit area of the cloth. The greater the value, the more mass per unit area of the cloth. A value of 0.1 creates a very heavy cloth; a value of 0.01 creates a light cloth. The default is 0.01.

Thickness

Controls the depth dimension of the cloth. The value specifies the collision offset of the cloth when it collides with itself and with other cloth bodies. The amount of offset may vary depending on the Thickness Force attribute. The default is 0.2. The recommended range for thickness is between 0.1 and 0.7.

Thickness is measured in centimeters and scaled by the solver scale attribute. If you increase the Solver Scale value, Thickness is decreased. For example, if solver scale is 10 and thickness is 0.2, then the actual thickness resulting will be 0.02 centimeters for your cloth mesh. If you choose thickness values beyond the recommended range, the simulation results are unpredictable.

When you have two cloth bodies colliding, the Thickness attribute is not additive. The solver uses the greater value as the Thickness. For example, if one cloth body has a Thickness of 0.5 and the other has a Thickness of 0.2, the distance maintained between them when they collide is 0.5, not 0.7.

Thickness Force

Controls the force used to maintain the collision offset specified by the Thickness attribute during cloth-to-cloth collisions. If a heavy piece of cloth gets closer to another piece of cloth than the distance specified by the Thickness attribute, you can increase this value to keep the heavier cloth at the proper distance. The default is 1.0.

In scenes with many cloth-to-cloth collisions, the recommended range for thickness force is between 30 and 75. A value of 50 for some animations is ideal.

Cloth Friction

Controls friction between the cloth and other cloth bodies. You can enter values between 0 and 1. Smaller values create less friction. The default is 0.3.

Cloth Damping

Specifies how strongly the overall motion of the cloth is diminished. The default is 0.2, which adds stability to the system. A value greater than 0 is recommended.

Air Damping

Specifies how strongly the motion of the cloth is diminished by the physical properties of the air. Air damping provides air resistance to triangles that are normal to the direction of travel. If the triangles on the cloth are parallel to the direction of travel, Air Damping has no effect. The default is 0.1.

Static Friction

Determines the friction between cloth and collision objects that are at rest and in contact. Static friction must be overcome for the cloth object to move against collision objects.

A value of 0 lets the cloth move freely against a collision object. A value of 1 restricts the movement between cloth and collision objects. The default is 0.6.

Dynamic Friction

Sets the amount of resistance to the motion of a moving cloth object against collision objects. A value of 0 lets the cloth move freely against a collision object. A value of 1 restricts the movement between cloth and collision objects. The default is 0.1.

Blend Weights

In the Blend Weights section, use the slider to set a blend weight value for vertices that overlap with other sets. The blend weight value can be between 0 and zero means the set has no weight, and 1 means the set has full weight. For example, if two overlapping sets both had a blend weight of 1, then the sets property values would be averaged together. But if set A had a blend weight of 0.5 and set B had a blend weight of 1.0, then set A would get half the weight of set B.

Set List

If the property contains a set of vertices the following buttons are available in the Set List section of the cpProperty node.

Select set vertices

This selects the vertices on the cloth object.

Add selected vertices to set

This adds the selected vertices to the set of vertices in the cloth property.

Replace set with selected vertices

This replaces the set of vertices in the cloth property with the currently selected vertices.

Remove selected vertices from set

This removes the selected vertices from the set of vertices in the cloth property.