From 69667910c62b2c9e30d795a9af668855a8de78d3 Mon Sep 17 00:00:00 2001
From: David Sarrut <david.sarrut@gmail.com>
Date: Mon, 24 Oct 2011 08:31:03 +0200
Subject: [PATCH] Add ComputeBBUnion

---
 itk/clitkBoundingBoxUtils.h   |  7 +++++++
 itk/clitkBoundingBoxUtils.txx | 26 ++++++++++++++++++++------
 2 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/itk/clitkBoundingBoxUtils.h b/itk/clitkBoundingBoxUtils.h
index 2138d63..311e67d 100644
--- a/itk/clitkBoundingBoxUtils.h
+++ b/itk/clitkBoundingBoxUtils.h
@@ -40,12 +40,19 @@ namespace clitk {
                              typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbi1, 
                              typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbi2);
 
+  //--------------------------------------------------------------------
+  template<int Dimension>
+  void ComputeBBUnion(typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbo, 
+                      typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbi1, 
+                      typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbi2);
+  
   //--------------------------------------------------------------------
   template<class ImageType>
   void ComputeRegionFromBB(const ImageType * image, 
                            const typename itk::BoundingBox<unsigned long, 
                                                            ImageType::ImageDimension>::Pointer bb, 
                            typename ImageType::RegionType & region);
+
 } // end clitk namespace
 
 #include "clitkBoundingBoxUtils.txx"
diff --git a/itk/clitkBoundingBoxUtils.txx b/itk/clitkBoundingBoxUtils.txx
index 26f38b2..d6fbc24 100644
--- a/itk/clitkBoundingBoxUtils.txx
+++ b/itk/clitkBoundingBoxUtils.txx
@@ -51,19 +51,33 @@ namespace clitk {
   void ComputeBBIntersection(typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbo, 
                              typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbi1, 
                              typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbi2) {
-
     typedef itk::BoundingBox<unsigned long, Dimension> BBType;
     typedef typename BBType::PointType PointType;
     PointType lastPoint;
     PointType firstPoint;
-
     for(unsigned int i=0; i<Dimension; i++) {
-      firstPoint[i] = std::max(bbi1->GetMinimum()[i], 
-                               bbi2->GetMinimum()[i]);
-      lastPoint[i] = std::min(bbi1->GetMaximum()[i], 
-                              bbi2->GetMaximum()[i]);
+      firstPoint[i] = std::max(bbi1->GetMinimum()[i], bbi2->GetMinimum()[i]);
+      lastPoint[i] = std::min(bbi1->GetMaximum()[i], bbi2->GetMaximum()[i]);
     }
+    bbo->SetMaximum(lastPoint);
+    bbo->SetMinimum(firstPoint);
+  }
+  //--------------------------------------------------------------------
+
 
+  ///--------------------------------------------------------------------
+  template<int Dimension>
+  void ComputeBBUnion(typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbo, 
+                      typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbi1, 
+                      typename itk::BoundingBox<unsigned long, Dimension>::Pointer bbi2) {
+    typedef itk::BoundingBox<unsigned long, Dimension> BBType;
+    typedef typename BBType::PointType PointType;
+    PointType lastPoint;
+    PointType firstPoint;
+    for(unsigned int i=0; i<Dimension; i++) {
+      firstPoint[i] = std::min(bbi1->GetMinimum()[i], bbi2->GetMinimum()[i]);
+      lastPoint[i] = std::max(bbi1->GetMaximum()[i], bbi2->GetMaximum()[i]);
+    }
     bbo->SetMaximum(lastPoint);
     bbo->SetMinimum(firstPoint);
   }
-- 
2.47.1