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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I got the impression from past discussions
that pinholes would return.<o:p></o:p></span></font></p>
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10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> users-bounces@racket-lang.org
[mailto:users-bounces@racket-lang.org] <b><span style='font-weight:bold'>On
Behalf Of </span></b>Stephen Bloch<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, June 25, 2010 11:13
AM<br>
<b><span style='font-weight:bold'>To:</span></b> PLT-Scheme Mailing List<br>
<b><span style='font-weight:bold'>Subject:</span></b> [racket] confusing
graphics primitives in 2htdp/image</span></font><o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>There are a whole lot of
graphics operations in 2htdp/image, and many of them come in pairs: overlay/xy
and place-image, add-line and scene+line, add-curve and scene+curve, etc. that
differ mainly in whether or not they crop the result to the bounding box of one
of the images. (They sometimes differ in how they interpret coordinates
-- whether measured from the center or the top-left of one of the images.)
Since the disappearance of pinholes, the "scene" datatype
doesn't serve much purpose any more. Would it make sense to use a
consistent and compositional naming scheme, e.g. add-line/crop, add-curve/crop,
etc?<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'>Stephen Bloch<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'><a
href="mailto:sbloch@adelphi.edu">sbloch@adelphi.edu</a><o:p></o:p></span></font></p>
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