eta   - orientation in radians

 OUTPUTS

 EXAMPLE
  filterSteerable( pi/4 );

 See also <a href="filterGauss.html" class="code" title="function G = filterGauss( dims, mu, C, show )">filterGauss</a>

 Piotr's Computer Vision Matlab Toolbox      Version 2.0
 Copyright 2014 Piotr Dollar.  [pdollar-at-gmail.com]
 Licensed under the Simplified BSD License [see external/bsd.txt]</pre></div>





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