8

GeoSphere Primitive 171
Effect of using Base To Pivot setting
Genera te M a pping Coords—Generates coordinates
for applying mapped materials to the sphere.
Default=on.
Real-World Ma p Size—Controls the scaling
method used for texture mapped materials that
are applied to the object. The scaling values are
cont rolled by the Use Real-World Scale settings
found in the applied material’s
Coordinates rollout
(page 2–1434)
. Default=off.
GeoSphere Primitive
Create panel > Geometry button > Standard Primitives >
Object Type rollout > G eoSphere button
Create menu > Standa rd Primitives > GeoSphere
Use GeoSphere to make spheres and hemispheres
based on three classes of regular polyhedrons.
Examples of geospheres
Geospheres produce a more regular surface than
standard spheres. They als o render with a slightly
smoother profile than a standard sphere given
thesamenumberoffaces. Unlikeastandard
sphere, a geosphere has no poles, which can b e an
advantage when you apply certain modifiers such
as
Free-Form Deformation (FFD) modifiers (page
1–677)
.
Procedures
To create a geospher e:
1.
OntheCreatemenuchooseStandard
Primitives > Geosphere.
2. In any viewport, drag to set the center and
radius of the geosphere.
3. Set parameters such as Geodesic Base Type and
Segments.
To create a geo-hemisphere:
1.
Create a geosphere.
2. In the Parameters rollout, turn on the
Hemisphere check box. The geosphere is
converted to a hemisphere.