X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=include%2Fbackprojectors.h;h=0a2a8e12c68b75ed0c91ffc17b42a97cb1e3a659;hb=dfa390de2efc04d85b03718a6480f735516df0e8;hp=08b72d450fbfb121a78532d1a1b37e1bbf9bb948;hpb=2d39e823ba389fc68e5317c422b55be006094252;p=ctsim.git

diff --git a/include/backprojectors.h b/include/backprojectors.h
index 08b72d4..0a2a8e1 100644
--- 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 1.4 2000/06/22 10:17:28 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 {
@@ -54,6 +55,18 @@ class Backprojector
     INTERP_LINEAR        // Linear interpolation 
   } InterpolationID;
 
+  static const char BPROJ_TRIG_STR[]=     "trig";
+  static const char BPROJ_TABLE_STR[]=    "table";
+  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";
+  static const char INTERP_BSPLINE_STR[]=  "bspline";
+
+
   Backprojector (const Projections& proj, ImageFile& im, const char* const backprojName, const char* const interpName);
 
   ~Backprojector (void);
@@ -61,24 +74,16 @@ class Backprojector
   void BackprojectView (const double* const viewData, const double viewAngle);
 
   bool fail(void) const {return m_fail;}
+  const string& failMessage(void) const {return m_failMessage;}
 
  private:
   string m_nameBackproject;
   string m_nameInterpolation;
   BackprojectID m_idBackproject;
   InterpolationID m_idInterpolation;
-  bool m_fail;
   Backproject* m_pBackprojectImplem;
-
-  static const char BPROJ_TRIG_STR[]=     "trig";
-  static const char BPROJ_TABLE_STR[]=    "table";
-  static const char BPROJ_DIFF_STR[]=     "diff";
-  static const char BPROJ_DIFF2_STR[]=    "diff2";
-  static const char BPROJ_IDIFF2_STR[]=   "idiff2";
- 
-  static const char INTERP_NEAREST_STR[]=  "nearest";
-  static const char INTERP_LINEAR_STR[]=   "linear";
-  static const char INTERP_BSPLINE_STR[]=  "bspline";
+  bool m_fail;
+  string m_failMessage;
 
   static const InterpolationID convertInterpolationNameToID (const char* const interpName);
   static const char* convertInterpolationIDToName (const InterpolationID interpID);
@@ -184,3 +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);
+};
+
+