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Chapters:
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<a href="Introduction.html">1: Introduction</a><br>
<a href="SimpleExample.html">2: Simple example</a><br>
<a href="InvokingGri.html">3: Invocation</a><br>
<a href="GettingMoreControl.html">4: Finer Control</a><br>
<a href="X-Y.html">5: X-Y Plots</a><br>
<a href="ContourPlots.html">6: Contour Plots</a><br>
<a href="Images.html">7: Image Plots</a><br>
<a href="Examples.html">8: Examples</a><br>
<a href="Commands.html">9: Gri Commands</a><br>
<a href="Programming.html">10: Programming</a><br>
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<a href="ConceptIndex.html"><i>Concepts</i></a><br>
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<h3>9.3.29: `<font color="#82140F"><code>postscript</code></font>'</h3>
<!-- latex: \index{postscript} -->
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<PRE>
<font color="#82140F">
`postscript \string'
</font></PRE>
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<p>
Write the indicated string to the PostScript output file, after
substitution of synonyms if there are any. Example:
<p>
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<PRE>
<font color="#82140F">
\a = "45" # angle
\w = "8.5" # page width
postscript gsave \w 72 mul 0 translate \a rotate
# ... other code to do stuff
postscript grestore
</font></PRE>
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<p>
Here is how to draw an image palette vertically instead of horizontally:
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<PRE>
<font color="#82140F">
\X = "3" # cm
\Y = "10" # cm
\a = "90" # degrees counterclockwise
postscript gsave \X 28.35 mul \Y 28.35 mul translate \a rotate
# Palette is at user's origin
draw image palette box 0 0 10 1
postscript grestore
</font></PRE>
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<p>
NOTE: the `<font color="#82140F"><code>postscript</code></font>' command is <b>very</b> dangerous, and should
normally only be used by developers. Most of the code concerning this
is in the file `<font color="#82140F"><samp>doline.cc</samp></font>'; look for the string
`<font color="#82140F"><code>postscriptCmd</code></font>' to find the relevant code.
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