8

200 Chapter 5: Creating Geometry
Smooth—
Applies smoothing to the object by
setting all p olygons to smoothing group 1.
Default=on.
Pr ism E x tended Pr imitive
Create panel > G eometry button > Extended Primitives
>ObjectTyperollout>Prismbutton
Create menu > Extended Primitives > Prism
Use Prism to create a three-sided prism with
independently segmented sides.
Example of a prism
Pr ocedur es
To create a prism with an isosceles tria ngle as its
bas e:
1.
Choose Isosceles on the Creation Method
rollout.
2. Drag horizontally in the viewport to define
thelengthofSide1(alongtheXaxis). Drag
vertically to define the length of Sides 2 and 3
(along the Y axis).
(Toconstrainthebasetoanequilateraltriangle,
pressCTRLbeforeperformingthisstep.)
3. Release the mouse, and move it vertically to
define the height of the prism.
4. Click to complete the prism.
5. On the Parameters rollout, alter the length of
the sides as needed.
To create a pr ism with a scalene or obtuse tr iangle
at its base:
1.
Choose Base/Apex in the Creation Method
rollout.
2. Drag horizontally in the viewport to define
thelengthofSide1(alongtheXaxis). Drag
vertically to define the length of Sides 2 and 3
(along the Y axis).
3. Cl ick, and then move the mouse to specify
the placement of the apex of the triangle. This
alters the length of sides 2 and 3, and the angles
of the corners of the triangle.
4. Click, and then move the mouse ver tical ly to
define the height of the prism.
5. Click to complete the prism.
Interf ace
Creation Meth od rollout
Isosceles—Draws a prism with an isosceles triangle
at its base.
Base/Apex—Draws a prism with a scalene or
obtuse triangle at its base.
Parameters rollout