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Diffstat (limited to 'funtools/man/man7/regdiff.7')
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diff --git a/funtools/man/man7/regdiff.7 b/funtools/man/man7/regdiff.7 new file mode 100644 index 0000000..c9f6f6a --- /dev/null +++ b/funtools/man/man7/regdiff.7 @@ -0,0 +1,181 @@ +.\" Automatically generated by Pod::Man v1.37, Pod::Parser v1.32 +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sh \" Subsection heading +.br +.if t .Sp +.ne 5 +.PP +\fB\\$1\fR +.PP +.. +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. | will give a +.\" real vertical bar. \*(C+ will give a nicer C++. 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For simple regions and simple boolean +algebra between regions, there should be no difference between the two +implementations. The following is a list of differences and +incompatibilities between the two: +.IP "\(bu" 4 +If a pixel is covered by two different regions expressions, +Funtools assigns the mask value of the \fBfirst\fR region that +contains that pixel. That is, successive regions \fBdo not\fR +overwrite previous regions in the mask, as was the case with the +original \s-1PROS\s0 regions. This means that one must define overlapping +regions in the reverse order in which they were defined in \s-1PROS\s0. If +region N is fully contained within region M, then N should be defined +\&\fBbefore\fR M, or else it will be \*(L"covered up\*(R" by the latter. This +change is necessitated by the use of optimized filter compilation, i.e., +Funtools only tests individual regions until a proper match is made. +.IP "\(bu" 4 +The \fB\s-1PANDA\s0\fR region has replaced the old \s-1PROS\s0 syntax in which +a \fB\s-1PIE\s0\fR accelerator was combined with an \fB\s-1ANNULUS\s0\fR accelerator +using \fB\s-1AND\s0\fR. That is, +.Sp +.Vb 1 +\& ANNULUS(20,20,0,15,n=4) & PIE(20,20,0,360,n=3) +.Ve +.Sp +has been replaced by: +.Sp +.Vb 1 +\& PANDA(20,20,0,360,3,0,15,4) +.Ve +.Sp +The \s-1PROS\s0 syntax was inconsistent with the meaning of the \fB\s-1AND\s0\fR operator. +.IP "\(bu" 4 +The meaning of pure numbers (i.e., without format specifiers) in +regions has been clarified, as has the syntax for specifying coordinate +systems. See the general discussion on +Spatial Region Filtering +for more information. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +See funtools(7) for a list of Funtools help pages |