8

172 Chapter 5: Creating Geometry
Inter face
Creation M ethod rollout
Diameter—Drawsageospherefromedgetoedge.
You can change the center location by moving t he
mouse.
Center—Draws a geosphere from the center out.
Parameters rollout
Radius—Sets the size of t he 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 squared.
Lower segment values work best. Using the
maximum segment va lue of 200 can generate up to
800,000 faces, impairing performance.
Geodesic Base Type group
Lets you choose one of three typ es 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 b e divided into four equal segments.
•
Octa—Based on an eight-sided oc tahedron.
The triangular facets can vary in shape and
size. The sphere can be divided into eight equal
segments.
•
Icosa—Based on a 20-sided icosahedron. The
facets are all equally sized equilateral triangles.
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 M apping Coords—Generates coordinates
for applying mapped materials to the geosphere.
Default=on.
Real-World M ap Size—Cont rols the scaling
method used for texture mapped materials that
areappliedtotheobject.Thescalingvaluesare
controlled by the Use Real-World Scale settings
found in the applied material’s
Coordinates rollout
(page 2–1434)
. Default=off.
Cylinder Primitive
Create pa nel > Geometry button > Standard Primitives >
Objec t Type rollout > Cylinder button
Create menu > Standard Primitives > Cylinder
Cylinder produces a cylinder, which you can
"slice" around its major axis.