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  <h1>libigl file formats</h1>
  <ul>
    <li><a href="./dmat.html">.dmat</a> uncompressed ASCII/binary files for dense matrices</li>
    <li><a href="./bf.html">.bf</a> ASCII files for representing skeletal bone "forests"</li>
    <li><a href="./tgf.html">.tgf</a> ASCII files for representing control handle graphs</li>
    <li><a href="http://tetgen.berlios.de/fformats.off.html">.off</a> Geomview's polyhedral file format</li>
    <li><a href="http://en.wikipedia.org/wiki/Wavefront_.obj_file#File_format">.obj</a> Wavefront object file format. Usually unsafe to assume anything more than vertex positions and triangle indices are supported</li>
    <li><a href="http://www.ann.jussieu.fr/frey/publications/RT-0253.pdf#page=33">.mesh</a> Medit's triangle surface mesh + tetrahedral volume mesh file format, see page 33, section 7.2.1</li>
    <li><i>.poly</i> Piecewise-linear complex. This format comes in many similar but importantly different flavors: 
      <a href="https://www.cs.cmu.edu/~quake/triangle.poly.html">triangle's</a>, <a href="http://tetgen.berlios.de/fformats.poly.html">tetgen's</a>, <a href="http://sparse-meshing.com/svr/0.2.1/format-poly.html">pyramid/SVR's</a></li>
    <li><i>.node</i> List of points (vertices). Described indentically (upto
        accepted dimensions, use of attributes and boundary markers) by <a
    href="https://www.cs.cmu.edu/~quake/triangle.node.html">Triangle</a>, <a
    href=http://tetgen.berlios.de/fformats.node.html>TetGen</a>, and <a
    href=http://www.cs.berkeley.edu/~jrs/stellar/#fileformats>Stellar</a>.
    </li>
    <li><i>.ele</i> Element (triangle or tet) list. This format comes in similar flavors: <a
    href=http://tetgen.berlios.de/fformats.ele.html>tetgen's</a>, <a
    href=http://www.cs.berkeley.edu/~jrs/stellar/#fileformats>stellar's</a>,
    and <a href=https://www.cs.cmu.edu/~quake/triangle.ele.html>triangle's</a>.
    The formats of TetGen and stellar are identical upto conventions on index
    ordering and number of allowed attributes (unverified).</li>
    <li><a href=http://tetgen.berlios.de/fformats.face.html class=missing>.face</a> TetGen's file format for simplicial facets.</li>
    <li><a href=http://en.wikipedia.org/wiki/Truevision_TGA>.tga</a> Truevision TGA or TARGA image file format. IGLLIB supports only very basic reading and writing RGB/RGBA files without colormaps and (unverified) run-length compression.</li>
    <li><a
    href=https://en.wikipedia.org/wiki/Portable_Network_Graphics>.png</a>
    Portable Network Graphics image file. IGLLIB (in the libiglpng extra)
  supports png image files via the <a href=https://github.com/yig/yimg>yimg</a>
  library. Alpha channels and compression are suppported.</li>
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