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24 Chapter 2: Viewing and Navigating 3D Space
HomeGridandGridObjects
Above: Inactive grid object in a scene
Below:Activatedgridobject
Thehomegridisalignedwiththeworldcoordinate
axes. You can turn it on and off for an y viewport,
butyoucan’tchangeitsorientation.
For flexibility, the home grid is supplemented by
grid objects: i ndependent grids you can place
anywhere, at any angle, aligned with any object or
surface. They function as "construction planes"
you can use once and discard or save for reuse. See
Precision and Draw ing Aids (page 2–1).
AutoGr id
The AutoGrid feature lets you create and activate
temporary g rid objects on the fly. T his lets you
create geometry off the face of any object by first
creating the temporary grid, then the object. You
also have the option to make the temporar y gr ids
permanent. See AutoGrid (page 2–7).
Understanding V iews
There are two types of views visible in viewport s:
• Axonometric views (page 3–913) show the scene
w ithout perspective. All lines in the model are
parall el to one another. The Top, Front, Left,
and User viewports are axonometric v iews.
Axonometric view of a scene
• Perspective views (page 3–992) show the
scene with lines that converge at the horizon.
The Perspective and Camera viewports are
examples of perspective v iews.
Perspective view of the same model
Pe rspective views most closely resemble human
vision, where objects appear to recede into the
distance, creating a sense of depth and space.
Axonometric views provide an undistorted view
of the scene for accurate scaling and placement. A
common workflow is to use axonometric views
to create the scene, then use a perspective view to
render the final output.