r138: *** empty log message ***

[ctsim.git] / include / backprojectors.h

diff --git a/include/backprojectors.h b/include/backprojectors.h
index 6b8b9c4635b76c183161167f14ec2f60e3f2b9b9..0a2a8e12c68b75ed0c91ffc17b42a97cb1e3a659 100644 (file)
--- a/include/backprojectors.h
+++ b/include/backprojectors.h
@@ -9,7 +9,7 @@
 **  This is part of the CTSim program
 **  Copyright (C) 1983-2000 Kevin Rosenberg
 **
-**  $Id: backprojectors.h,v 1.5 2000/06/25 17:32:24 kevin Exp $
+**  $Id: backprojectors.h,v 1.6 2000/07/07 15:30:59 kevin Exp $
 **
 **  This program is free software; you can redistribute it and/or modify
 **  it under the terms of the GNU General Public License (version 2) as
@@ -39,7 +39,8 @@ class Backprojector
     BPROJ_TABLE,
     BPROJ_DIFF,
     BPROJ_DIFF2,
-    BPROJ_IDIFF2
+    BPROJ_IDIFF2,
+    BPROJ_IDIFF3
 } BackprojectID;
 
   typedef enum {
@@ -59,6 +60,7 @@ class Backprojector
   static const char BPROJ_DIFF_STR[]=     "diff";
   static const char BPROJ_DIFF2_STR[]=    "diff2";
   static const char BPROJ_IDIFF2_STR[]=   "idiff2";
+  static const char BPROJ_IDIFF3_STR[]=   "idiff3";
  
   static const char INTERP_NEAREST_STR[]=  "nearest";
   static const char INTERP_LINEAR_STR[]=   "linear";
@@ -187,3 +189,14 @@ class BackprojectIntDiff2 : public BackprojectDiff
 };
 
 
+class BackprojectIntDiff3 : public BackprojectDiff
+{
+ public:
+  BackprojectIntDiff3 (const Projections& proj, ImageFile& im, Backprojector::InterpolationID interpType)
+    :  BackprojectDiff::BackprojectDiff (proj, im, interpType)
+    {}
+  
+  void BackprojectView (const double* const t, double view_angle);
+};
+
+