Revision: 70878
          http://sourceforge.net/p/brlcad/code/70878
Author:   brlcad
Date:     2018-04-12 17:18:30 +0000 (Thu, 12 Apr 2018)
Log Message:
-----------
document rt's ability to directly output png files

Modified Paths:
--------------
    brlcad/trunk/doc/docbook/system/man1/rt.xml

Modified: brlcad/trunk/doc/docbook/system/man1/rt.xml
===================================================================
--- brlcad/trunk/doc/docbook/system/man1/rt.xml 2018-04-12 13:54:37 UTC (rev 
70877)
+++ brlcad/trunk/doc/docbook/system/man1/rt.xml 2018-04-12 17:18:30 UTC (rev 
70878)
@@ -37,17 +37,24 @@
       
<citerefentry><refentrytitle>brlcad</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
       Alternatively, the output can be stored in a pixel file
       
(<citerefentry><refentrytitle>pix</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-      format) by specifying <option>-o</option> 
<replaceable>output.pix</replaceable>
-      in the option list. The orientation of the rays to be fired may be 
specified by
-      the <option>-a</option> and <option>-e</option> options, in which case 
the model
-      will be autosized, and the grid will be centered on the centroid of the 
model, with
-      ray spacing chosen to span the entire set of <emphasis 
remap="I">objects</emphasis>.
-      Alternatively, with the <option>-M</option> option, a transformation 
matrix may
-      be provided on standard input which maps model-space to view-space. In 
this case,
-      the grid ranges from -1.0 = X,Y = +1.0 in view space, with the size of 
the grid
-      (number of rays fired) specified with <option>-s</option>.  The 
<option>-M</option>
-      option is most useful when <command>rt</command> is being invoked from a 
shell script
-      created by an 
<citerefentry><refentrytitle>mged</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+      format) by
+      specifying <option>-o</option> <replaceable>output.pix</replaceable>
+      or in a PNG image file by
+      specifying <option>-o</option> <replaceable>output.png</replaceable>
+      in the option list. The orientation of the rays to be fired may
+      be specified by the <option>-a</option> and <option>-e</option>
+      options, in which case the model will be autosized, and the grid
+      will be centered on the centroid of the model, with ray spacing
+      chosen to span the entire set
+      of <emphasis remap="I">objects</emphasis>.  Alternatively, with
+      the <option>-M</option> option, a transformation matrix may be
+      provided on standard input which maps model-space to
+      view-space. In this case, the grid ranges from -1.0 = X,Y = +1.0
+      in view space, with the size of the grid (number of rays fired)
+      specified with <option>-s</option>.  The <option>-M</option>
+      option is most useful when <command>rt</command> is being
+      invoked from a shell script created by
+      an 
<citerefentry><refentrytitle>mged</refentrytitle><manvolnum>1</manvolnum></citerefentry>
       <emphasis remap="I">saveview</emphasis> command.
     </para>
 
@@ -281,15 +288,20 @@
       </varlistentry>
 
       <varlistentry>
-       <term><option>-o output.pix</option></term>
+       <term><option>-o output</option></term>
        <listitem>
          <para>
-         specifies the name of a file to store the
+         specifies the name of a file to store your output data file.
+         For example, if you specify your output as image.pix, it
+         will write out an image file in the
          
<citerefentry><refentrytitle>pix</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-         format output.
-         The
+         file format.  If you specify an image.png file, it will
+         write out an image file in the PNG file format.  The
          
<citerefentry><refentrytitle>pix-fb</refentrytitle><manvolnum>1</manvolnum></citerefentry>
-         utility can be used later to display ".pix" files.
+         and
+         
<citerefentry><refentrytitle>png-fb</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+         utilities can be used to display ".pix" and ".png" files
+         respectively.
          </para>
        </listitem>
       </varlistentry>
@@ -702,6 +714,7 @@
   
<citerefentry><refentrytitle>mged</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   
<citerefentry><refentrytitle>lgt</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   
<citerefentry><refentrytitle>pix-fb</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+  
<citerefentry><refentrytitle>png-fb</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   
<citerefentry><refentrytitle>rtray</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   
<citerefentry><refentrytitle>rtpp</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   
<citerefentry><refentrytitle>librt</refentrytitle><manvolnum>3</manvolnum></citerefentry>,

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