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Dear Zbigniew,<br>
<blockquote cite="mid:646377B8-7BAC-4E3B-AEF9-D7D678002D8C@tufts.edu"
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<div>1. Where do the limits on the parameters u and v get set? If I
want the width of the band to</div>
<div>change, where do I modify the code?</div>
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They are set within the base=<br>
<br>
Play around with the factors of the \defFunction macro -- this one
defines the function. This function then gets a UNIQUE name -- in this
case _mobius_ with the variables _u_ and _v_<br>
You can define some other functions in that way with whatever variable
you like: _s_ and _t_, _x_ and _y_ etc. with another name.<br>
<br>
Within the macro \psSolid, you declare:<br>
<span class="Apple-tab-span" style="white-space: pre;"></span>function=mobius,
which calls back the defined function with its declared variables. <br>
base = 0.2 0.25 0 pi then sets the range of the variables
(u[0.2;0.25],v[0;pi])<br>
<br>
This is helpful, that you not have to declare what variable names you
chose -- base does the job automatically.<br>
object=surfaceparametree, defines the kind of object that solides-3d
predefined -- a function in 2 variables in that case.<br>
<span class="Apple-tab-span" style="white-space: pre;"></span>ngrid=.025,
sets the GRID of the surface -- sometimes need to be set to .024 to
avoid a division by zero...<br>
<blockquote cite="mid:646377B8-7BAC-4E3B-AEF9-D7D678002D8C@tufts.edu"
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<div>2. what does the !50 after the colors do?</div>
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This gives 50 % if intensity to the named color<br>
<blockquote cite="mid:646377B8-7BAC-4E3B-AEF9-D7D678002D8C@tufts.edu"
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<div>3. What is the role of base=...?</div>
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To setup the range of the u and v values.<br>
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Hope that helps,<br>
<br>
Juergen<br>
<blockquote cite="mid:646377B8-7BAC-4E3B-AEF9-D7D678002D8C@tufts.edu"
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<div> <span class="Apple-style-span"
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<p style="margin: 0px;"><font
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face="Helvetica" size="3"><br class="Apple-interchange-newline">
Zbigniew Nitecki</font></p>
<p style="margin: 0px;"><font
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face="Helvetica" size="3">Department of Mathematics</font></p>
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face="Helvetica" size="3">Tufts University</font></p>
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face="Helvetica" size="3">Medford, MA 02155</font></p>
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face="Helvetica" size="3">telephones:</font></p>
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face="Helvetica" size="3">Office<span class="Apple-converted-space"><span
class="Apple-converted-tab"> <span class="Apple-converted-space"> </span></span></span>(617)627-3843</font></p>
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style="font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: normal; font-size-adjust: none; font-stretch: normal;"
face="Helvetica" size="3">Dept.<span class="Apple-converted-space"><span
class="Apple-converted-tab"> <span class="Apple-converted-space"> </span></span></span>(617)627-3234</font></p>
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style="font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: normal; font-size-adjust: none; font-stretch: normal;"
face="Helvetica" size="3">Dept. fax<span class="Apple-converted-space"><span
class="Apple-converted-tab"> <span class="Apple-converted-space"> </span></span></span>(617)627-3966</font></p>
<a moz-do-not-send="true" href="http://www.tufts.edu/%7Eznitecki/">http://www.tufts.edu/~znitecki/</a></span>
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Jürgen Gilg
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