Index: trunk/psLib/src/astro/psCoord.h
===================================================================
--- trunk/psLib/src/astro/psCoord.h	(revision 5814)
+++ trunk/psLib/src/astro/psCoord.h	(revision 6230)
@@ -11,6 +11,6 @@
  *  @author GLG, MHPCC
  *
- *  @version $Revision: 1.49 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2005-12-20 05:05:37 $
+ *  @version $Revision: 1.50 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2006-01-28 01:31:44 $
  *
  *  Copyright 2004-2005 Maui High Performance Computing Center, University of Hawaii
@@ -25,4 +25,5 @@
 #include "psList.h"
 #include "psPolynomial.h"
+#include "psPixels.h"
 //#include "psTime.h"
 
@@ -435,4 +436,23 @@
 );
 
+/** Generates a list of pixels in the output coordinate frame that overlap the input
+ *  pixels in the input coordinate frame through the specified transformation, inToOut.
+ *
+ *  psPixelsTransform is more complicated than simply transforming the input pixels,
+ *  but requires the evaluation of the derivatives of the transformation in order to
+ *  obtain the list of all pixels in the output coordinate frame that possibly overlap
+ *  the pixel in the input coordinate frame.  In the event that input or inToOut are
+ *  NULL, the function shall generate an error and return NULL.  If out is non-NULL it
+ *  shall be modified and returned;  otherwise a new psPixels shall be allocated and
+ *  returned.
+ *
+ *  @return psPixels*:      the list of overlapping pixels.
+ */
+psPixels *psPixelsTransform(
+    psPixels *out,                     ///< output list of overlapping pixels
+    const psPixels *input,             ///< input list of pixels
+    const psPlaneTransform *inToOut    ///< specified transformation
+);
+
 /// @}