2011

Table Of Contents
global illumination An indirect illumination technique that allows for effects
such as color bleeding. As light hits a colored object in the model, photons
bounce to adjacent objects and tint them with the color of the original object.
Gooch shading A type of shading that uses a transition from cool to warm
colors rather than from dark to light.
graphics area See drawing area.
graphics window See AutoCAD window and drawing area.
grid An area covered with regularly spaced dots or lines to aid drawing. The
grid spacing is adjustable. The grid dots are never plotted. See also grid limits.
(GRID)
grid limits The user-defined rectangular boundary of the drawing area covered
by dots when the grid is turned on. Also called drawing limits. (LIMITS)
grip modes The editing capabilities activated when grips are displayed on an
object: stretching, moving, rotating, scaling, and mirroring.
grip tool An icon that you use in a 3D view to easily constrain the movement
or rotation of a selection set of objects to an axis or a plane. (3DMOVE,
3DROTATE)
grips Small squares and triangles that appear on objects you select. After
selecting the grip, you edit the object by dragging it with the pointing device
instead of entering commands.
ground plane The XY plane of the user coordinate system when perspective
projection is turned on. The ground plane displays with a color gradient
between the ground horizon (nearest to the horizon) and the ground origin
(opposite the horizon). See also sky and underground.
guide curves Lines or curves that intersect each cross section of a lofted solid
or surface and that define the form by adding additional wireframe information
to the object. (LOFT)
handle A unique alphanumeric tag for an object in the program's database.
2166 | Glossary