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font A character set, made up of letters, numbers, punctuation marks, and symbols of a
distinctive proportion and design.
footcandle The American unit of illuminance (symbol: fc). Lm/ft^2.
footcandle The American unit of illuminance (symbol: fc). Lm/ft^2
freeze A setting that suppresses the display of objects on selected layers. Objects on frozen
layers are not displayed, regenerated, or plotted. Freezing layers shortens regenerating time.
See also thaw. (LAYER)
front faces Faces with their normals pointed outward.
general property Properties that are common between a selection of objects. These include
Color, Layer, Linetype, Linetype scale, Plot style, Lineweight, Transparency, and Thickness.
generic surface A 3D surface object with no control vertices, history, or analytic information.
Generic surfaces cannot be associative and they are created when associative analytic surfaces
are separated or by using the BREP on page 146 command. See also procedural surface and
NURBS surface.
geometric constraint Rules that define the geometric relationships of objects (or points of
objects) elements and control how an object can change shape or size.
Geometric constraints are coincident, collinear, concentric, equal, fix, horizontal, parallel,
perpendicular, tangent, and vertical.
geometry All graphical objects such as lines, circles, arcs, polylines, and dimensions.
Nongraphical objects, such as linetypes, lineweights, text styles, and layers are not considered
geometry. See also named object.
gizmo A tool that permits you to manipulate a 3D object uniformly or along a specified
axis or plane. Examples of gizmos include the 3D Move, 3D Rotate, and 3D Scale gizmos.
They are displayed when you select a 3D object.
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.
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)
1608 | Chapter 51 Glossary