NAME

DoSampleJitter − Create a jitter sampling camera attribute object for antialiasing

SYNOPSIS

C:

DtObject DoSampleJitter(factor)
DtReal factor;

FORTRAN:

INTEGER∗4 DOSJIT(FACTOR)
REAL∗8 FACTOR

DESCRIPTION

DoSampleJitter creates a jitter sampling camera attribute object for antialiasing. 

Jitter sampling means that pixels are not sampled at a fixed point, e.g. the pixel center, but at a random point within the pixel.  Jitter sampling can also be done in conjunction with supersampling. 

The parameter factor is a number specifying the percent of a pixel from the fixed point which is the maximum random deviation allowed.  Typically factor will be between 0.0 and 1.0.  Adjusting this jitter factor gives control of the tradeoff between decreased aliasing and increased noise. 

Jitter sampling is enabled or disabled with the DoSampleJitterSwitch <DOSJSW> attribute. 

DEFAULTS

The default DoSampleJitter is 0.5. 

SEE ALSO

DoSampleJitterSwitch(3D), DoSampleSuper(3D), DoLocalAntiAliasStyle(3D), DoLocalAntiAliasSwitch(3D)

September 02, 1992