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Create polygon primitives
Polygon creation
Create polygon primitives using the Create menu
Create polygon primitives interactively
You
can position, scale, and adjust various attributes on primitives
as you create them using the Interactive Creation feature. Interactive
Creation is turned on by default.
The Interactive primitive
creation feature lets you create primitives in two ways:
- Click-drag
in the scene to interactively position and adjust the primitive’s attributes.
- Click
once in the scene to create a primitive. A primitive is created
where you click. The primitive’s options are set by selecting
Create > Polygon Primitives >
Primitive Shape > .
The Exit on Completion option
(turned on by default) automatically exits the primitive creation
tool once you have created the primitive. If you want to create
multiple primitives, turn off
Create > Polygon Primitives > Exit
on Completion.
The steps for creating a polygon primitive interactively
consist of multiple click-drag operations in the scene view. The
number of click-drag operations varies depending on the primitive
type:
NotePressing Enter at any point during the interactive
creation process immediately completes the primitive creation and
skips any remaining attributes.
If you want to skip interactively setting an
attribute during the interactive creation process, single-click
with your mouse to move to the next step.
Before you start:
- Turn
on
Create > Polygon Primitives > Interactive
Creation if necessary.
- Select
Create > Polygon Primitives,
and choose the primitive type, or select the primitive type from
the Polygons shelf.
If you want to change the non-interactive attributes
that a polygon primitive is created with, such as Radius, Divisions,
or Texture Mapping UVs, select
Create > Polygon Primitives >
Primitive Shape > .
Primitive type |
To create the primitive interactively |
Sphere, Torus, Pyramid, Soccer
Ball, Platonic Solids
|
- In
the scene view, click-drag to create the primitive.
The initial click-drag specifies the location
for the primitive as well as the radius or scale for these primitive
types.
The Torus primitive has an additional click-drag
step to specify the Section Radius attribute.
- In
the scene view, click-drag to specify the subdivisions along the
height and width of the primitive using the left mouse button.
The Soccer Ball and Platonic
Solids primitives do not have a subdivisions step.
|
Cube, Cylinder, Cone, Prism
|
- In
the scene view, click-drag to create the primitive.
The initial click-drag specifies the location
for the primitive as well as the shape of the base of these primitive
types.
- Click-drag
to specify the height of the primitive.
- Click-drag
to specify the subdivisions along the height, width, and depth of
the primitive.
Note: The number of click-drag operations for
the subdivisions varies depending on the primitive type.
|
Pipe, Helix
|
- In
the scene view, click-drag to create the primitive.
The initial click-drag specifies the location
for the primitive as well as the radius/width of the primitive.
- Click-drag
to specify the height of the primitive.
- Click-drag
to specify the following attributes for these primitive types:
- Pipe -
specifies the thickness of the pipe.
- Helix -
specifies the number of coils.
Note: The Helix primitive has an additional
click-drag step after the number of coils to specify the Radius attribute.
- Click-drag
to specify the subdivisions along the height, width, and depth of
the primitive.
|
When the primitive creation steps are complete,
the wireframe color for the primitive changes from a bright green
to the green color for an actively selected object.
TipTo set the axis for your primitive during
interactive creation, you can use the orthogonal views. Whichever
view you create your primitive in—top, front, or side—is
the way your primitive’s axis will be aligned (y, z, or x).
NotePrimitives with caps (Pyramid, Cylinder, Cone,
Pipe) have an additional attribute called Adjust
cap subdivisions after create that is turned off by default.
When you turn this feature on in the primitive’s tool options window,
an additional step is added to the interactive creation process
for those primitive types.
Holding down the Shift and Control keys during
primitive creation has the following effect:
Modifier key |
Effect |
(None)
|
Grows plane and cube primitives from one corner.
Grows all other primitives from their center.
|
Control
|
Grows plane and cube primitives from their center.
(No effect on all other primitives.) When adjusting primitive attributes
in subsequent interactive steps, pressing the Control key momentarily
reduces the mouse speed.
|
Shift
|
Constrains all primitives to three-dimensional
equilateral proportions and grows them from their base. When adjusting
primitive attributes in subsequent interactive steps, pressing the
Shift key momentarily increases the mouse speed.
|
Control + Shift
|
Constrains all primitives to three-dimensional
equilateral proportions and grows them from their center.
|
To
create a polygon primitive with a single click
- Select
Create > Polygon Primitives > Interactive
Creation. (Ensure that a check mark appears beside the Interactive
Creation menu item)
If you want to change the settings that the
polygon primitive is created with, such as Divisions or Texture
Mapping, select
Create > Polygon Primitives >
Primitive Shape > .
There are specific single-click settings for
primitive creation.
- Click
in the scene view to create the primitive.
To
create multiple polygon primitives interactively
- Select
Create > Polygon Primitives > Exit
on Completion to turn off the feature. (Ensure that a
check mark does not appear beside the Exit on Completion menu
item.)
You can create multiple polygon primitives
in succession without having to return to the Polygon
Primitive menu or Shelf.
Useful interactive creation options
During
interactive primitive creation, you can snap the polygon to existing objects
in the scene. You have the following options (click the icon in
the Status line or press the hotkey).
Snap to:
- grid
- curves
- CV,
vertex, or pivot
- live
object
These features let you snap to a projected point
on the line or plane defined by any other object in your scene while
you create the primitive. For example, you could create a cylinder
to act as a telescope on the dome of an observatory.
TipSome grid snap operations may limit the
interactive primitive creation in the perspective view. For example,
if you turn on grid snap and interactively create the base of a
cube, you will not be able to vertically drag to create the height component
if the grid snap option is left on while working in the perspective view.
Instead, create the base of a cube in the perspective
view, then switch to a front or side orthographic view to snap the
height of the cube using the grid as a reference.
For more information, see
Snap to the grid, a curve, points, or a view plane and
Snap all creation tools to a surface or construction plane.