2011

Bezier curve A polynomial curve defined by a set of control points, representing an equation
of an order one less than the number of points being considered. A Bezier curve is a special
case of a B-spline curve. See also B-spline curve.
bitmap The digital representation of an image having bits referenced to pixels. In color
graphics, a different value represents each red, green, and blue component of a pixel.
blips Temporary screen markers displayed in the drawing area when you specify a point or
select objects. (BLIPMODE)
block A generic term for one or more objects that are combined to create a single object.
Commonly used for either block definition or block reference. See also block definition and
block reference. (BLOCK)
block definition The name, base point, and set of objects that are combined and stored in
the symbol table of a drawing. See also block and block reference.
block definition table The nongraphical data area of a drawing file that stores block
definitions. See also named object.
block instance See block reference.
block reference A compound object that is inserted in a drawing and displays the data
stored in a block definition. Also called instance. See also block and block definition. (INSERT)
bounded area A closed area that consists of a single object (such as a circle) or of multiple,
coplanar objects that overlap. You can insert hatch fills within bounded areas.
Bounded areas are also used to create 3D objects through extrusion by using the PRESSPULL
command.
bump map A map in which brightness values are translated into apparent changes in the
height of the surface of an object.
BYBLOCK A special object property used to specify that the object inherits the color or
linetype of any block containing it. See also BYLAYER.
BYLAYER A special object property used to specify that the object inherits the color or
linetype associated with its layer. See also BYBLOCK.
callout block A block used as symbol to reference another sheet. Callout blocks have many
industry-specific terms, such as reference tags, detail keys, detail markers, and so on. See
also label block.
camera Defines the current eye-level position in a 3D model. A camera has a location XYZ
coordinate, a target XYZ coordinate, and a field of view or lens length, which determines
the magnification or zoom factor.
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