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Edit Object List Dialog 677
vertex is given a mass of 1 gram, but the object
itself has no v olume.
Surf ace—Treats the object as a hollow shell whose
thicknessis1centimeter.Themassisderivedfrom
the surface area and the 1-centimeter thickness,
but the object has no volum e.
Bounding Box—A bounding box surrounding the
extents of the object is used to calculate both the
volume(ofasolidboundingbox)andthemass
(based on the volume).
Bounding Cylinder—Similar to the Bounding Box
option,exceptthataboundingcylinderisused,
whose Z height axis is aligned with the local Z axis
of the object.
B ounding Sphere—Similar to Bounding Box,
except that a bounding sphere is used.
Mesh Solid—The geometry of the object is used to
calculate both the volume and the mass, according.
Property Estimate Resolution options
AvailableonlywhentheMeshSolidoptionis
chosen. The Property Estimate Resolution settings
affect the accurac y with wh ich the mass moment
is ca lculated. This determines how accurately the
rotation of the object responds to torque.
Grid—Asamplegridisusedtocalculatethemass
moment. The smaller the cells in the grid, the
more accurate the calculation. The gr id cells are
measured in centimeters, regardless of the current
display unit.
Overr ide Automatic R esolution—Lets the Dynamics
utility automatically set the grid size based on the
complexity and size of the object. In addition, the
lowestvaluethatwillbeautomaticallycalculated
is plugged into the Grid spinner (which is also
unavailable). If you want to specify your own grid
value using the Grid spinner, but want some idea
of where to start, t urn off Automatic Resolution
andthenturnitbackonagain.
Edit Object List Dialog
Utilities p anel > Utilities rollout > More button >
Dynamics>Dynamicsrollout>EditObjectListbutton>
Edit Obje ct List dialog
TheEditObjectListdialogletsyouselectthe
objectstoincludeinadynamicssimulation.
Highlig ht objects from the Objects in the Scene
list on the left, and then click the > button to place
them in the Objects in the Simulation list on the
right side of the dialog.
The Exclude and Include option buttons above the
rig ht w indow determine whether the items listed
are excluded from or included in the simulation.
Note: All the selection and inclusion dialogs in
the Dynamics Utility are displayed and function
similarly.
Interfa ce
Objects i n the Scene—To add scene objects to the
simulation (assuming Include is chosen), select
objects from the list on the left, then use the >
button to move them to the list on the right.
Search Field—TheeditboxabovetheSceneObjects
list lets you search for object names by e ntering