9

Cylinder Primitive 177
Inter face
Creation Method rollout
Diameter—Drawsageospherefromedgetoedge.
You can change the center location by moving the
mouse.
Center—Dra ws a geosphere from the center out.
Parameters rollout
Radius—Sets the size of the geosphere.
Segments—Sets the total number of faces in the
geosphere. The number of faces in a geosphere is
equal to the sides of the base polyhedron times the
segments s quared.
Lower segment va lues work best. Using the
maximum seg ment value of 200 can generate up to
800,000 faces, impairing per formance.
Geodesic Base Type group
Lets you choose one of three types of regular
polyhedrons for the geosphere’s basic geometry.
•
Tetra—Based on a four-sided tetrahedron. The
triangular facets can vary in shape and size. The
sphere can be d ivided into four equal segments.
•
Octa—Based on an eight-sided octahedron.
The t riangular facets can vary in shape and
size. The sphere can b e divided into eig ht equal
segments.
•
Icosa—Based on a 20-sided icosahedron. The
facets are all equally sized equilateral t riangles.
The sphere can be divided into any number
of equal segments, based on multiples and
divisions of 20 faces.
Smooth—Applies smoothing groups to the surface
of the sphere.
Hemispher e—Creates a half-sphere.
Base To Pivot—Sets the pivot point location. When
on, the pivot is at the bottom of the sphere. When
off, the pivot is at the center of the sphere. This
option has no effect when Hemisphere is on.
Gener ate Ma pping Coords —Generates coordinates
for applying mapped materials to the geosphere .
Default=on.
Real-World Map Size—Controls the scaling method
used for texture mapped materials that are applied
totheobject. Thescalingvaluesarecontrolled
by the Use Real-World Scale settings found in
the applied material’s Coordinates rollout (page
2–1625).Default=off.
Cylinder Primitive
Create panel > Geometry button > Standard Primitives >
Objec t Type ro llout > Cylinder button
Create menu > Standard Primitives > Cylinder
Cylinder produces a cylinder, which you can
"slice" around its major axis.