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Copy to Object's Material Copies the value in the Sliding Friction spinner to
the material assigned to the object.
Physical Properties group
Provides controls that specify the physical properties of the current object.
Density Specifies the density of the object in grams per cc. A setting of 1 is
the equivalent of water, and useful for anything wooden, plastic, or organic.
The more dense an object, the slower it will react to forces. There is a direct
relationship between density and mass, so when you alter the Density setting,
the Mass value changes (when its automatic value is not overridden).
Mass Technically, mass is the measure of how many subatomic particles are
in an object. In 3ds Max, it's calculated as a result of density times volume.
Mass can is the resistance to acceleration given a constant force. The greater
the mass, the more resistance. The Mass value, when not overridden, is derived
from the density and volume, and the volume, when automatically calculated,
is affected by the Calculate Properties Using option.
Override Automatic Mass Enables the Mass spinner so you can specify the
object's mass. When you override the automatic value, the Mass value is no
longer affected by the Density or Volume values.
Mass is affected by the Calculate Properties Using options.
Volume The volume of the object, measured in cubic centimeters. When
automatically calculated, this value depends on the option chosen under
Calculate Properties Using.
Override Automatic Volume Enables the Volume spinner so you can specify
the object's volume. When you override the automatic Volume value, it's no
longer affected by the Calculate Properties Using options, and it no longer
affects the Mass value.
Calculate Properties Using options
Specifies the type of geometry the simulation will use to calculate the mass,
the volume, and the mass moment. When the Mass and Volume values are
automatically calculated (their overrides are turned off), changing these options
affects the volume, and thus the mass.
Vertices Treats an object as a "point cloud," or a collection of vertices without
segments. Each vertex is given a mass of 1 gram, but the object itself has no
volume.
3872 | Chapter 15 Animation