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procedural surface A 3D surface object that has history and analytic information, but no
control vertices. Procedural surfaces are the only type of surface that can be associative. See
also generic surface and NURBS surface.
profile curve An object that is swept, extruded, or revolved and defines the shape of the
resulting solid or surface. (SWEEP, EXTRUDE, REVOLVE)
prompt A message on the command line or in a tooltip that asks for information or requests
action such as specifying a point.
proxy object A substitute for a custom object when the ObjectARX application that created
the custom object is not available. See also custom object and object enabler.
QuickView A tool to preview and switch between open drawings and layouts in a drawing.
ray tracing The renderer can generate reflections and refractions. Ray tracing traces the
path of rays sampled from the light source. Reflections and refractions generated this way
are physically accurate.
ray-traced shadows A way that the renderer can generate shadows. Ray tracing traces the
path of rays sampled from the light source. Shadows appear where rays have been blocked
by objects. Ray-traced shadows have sharp edges.
rectangular break To break a table into multiple parts that are evenly spaced and set at a
user-specified height using the table breaking grips.
redraw To quickly refresh or clean up blip marks in the current viewport without updating
the drawing's database. See also regenerate. (REDRAW)
reference A definition, known as an external reference or block reference, that is used and
stored in the drawing. See also block (BLOCK) and external reference (xref). (XREF)
refine To quadruple the number of faces in a mesh object as you reset the baseline level of
smoothness. (You cannot make a mesh courser than its baseline level.) You can also refine
specified mesh faces without resetting the baseline level of smoothness for the object.
(MESHREFINE)
reflectance scale Increases or decreases the amount of energy the material reflects.
reflection color The color of a highlight on shiny material. Also called specular color.
reflection mapping Creates the effect of a scene reflected on the surface of a shiny object.
refraction How light distorts through an object.
regenerate To update a drawing's screen display by recomputing the screen coordinates
from the database. See also redraw. (REGEN)
1616 | Chapter 51 Glossary