From 89480b23b6f4f748dc29f0241ddc015fb092f365 Mon Sep 17 00:00:00 2001
From: srit <srit>
Date: Wed, 10 Mar 2010 18:30:34 +0000
Subject: [PATCH] Corrected LocalWindowing: now really in screen (view)
 coordinates

---
 vv/vvSlicer.cxx | 45 ++++++++++++++++++++++++++-------------------
 1 file changed, 26 insertions(+), 19 deletions(-)

diff --git a/vv/vvSlicer.cxx b/vv/vvSlicer.cxx
index d50a422..03ecaaa 100644
--- a/vv/vvSlicer.cxx
+++ b/vv/vvSlicer.cxx
@@ -1145,32 +1145,39 @@ void vvSlicer::SetColorLevel(double level)
 // Returns the min an the max value in a 41x41 region around the mouse pointer
 void vvSlicer::GetExtremasAroundMousePointer(double & min, double & max)
 {
+    //Get mouse pointer position in view coordinates
     double fLocalExtents[6];
+    for(int i=0; i<3; i++)
+    {
+        fLocalExtents[i*2  ] = mCurrent[i];
+        fLocalExtents[i*2+1] = mCurrent[i];
+    }
+    this->Renderer->WorldToView(fLocalExtents[0], fLocalExtents[2], fLocalExtents[4]);
+    this->Renderer->WorldToView(fLocalExtents[1], fLocalExtents[3], fLocalExtents[5]);
+    for(int i=0; i<3; i++)
+    {
+        if (i!=SliceOrientation) //SR: assumes that SliceOrientation is valid in ViewCoordinates (???)
+        {
+            fLocalExtents[i*2  ] -= 0.2;
+            fLocalExtents[i*2+1] += 0.2;
+        }
+    }
+    this->Renderer->ViewToWorld(fLocalExtents[0], fLocalExtents[2], fLocalExtents[4]);
+    this->Renderer->ViewToWorld(fLocalExtents[1], fLocalExtents[3], fLocalExtents[5]);
+
+    //Convert to image pixel coordinates (rounded)
     int iLocalExtents[6];
     for(int i=0; i<3; i++)
     {
-        //Define corners of an area on the screen
-	if(SliceOrientation != i)
-	{
-	    fLocalExtents[i*2  ] = mCurrent[i]-20;
-	    fLocalExtents[i*2+1] = mCurrent[i]+20;
-	}
-	else
-	{
-	    fLocalExtents[i*2  ] = mCurrent[i];
-	    fLocalExtents[i*2+1] = mCurrent[i];
-	}
-
-	//Convert to image pixel coordinates
         fLocalExtents[i*2  ] = (fLocalExtents[i*2  ] - this->GetInput()->GetOrigin()[i])/this->GetInput()->GetSpacing()[i];
         fLocalExtents[i*2+1] = (fLocalExtents[i*2+1] - this->GetInput()->GetOrigin()[i])/this->GetInput()->GetSpacing()[i];
-	
-	//Round
-	iLocalExtents[i*2  ] = lrint(fLocalExtents[i*2  ]);
-	iLocalExtents[i*2+1] = lrint(fLocalExtents[i*2+1]);
-    }
     
-    ClipDisplayedExtent(iLocalExtents, this->GetInput()->GetExtent());
+        iLocalExtents[i*2  ] = lrint(fLocalExtents[i*2  ]);
+        iLocalExtents[i*2+1] = lrint(fLocalExtents[i*2+1]);
+
+        if(iLocalExtents[i*2  ]>iLocalExtents[i*2+1])
+            std::swap(iLocalExtents[i*2], iLocalExtents[i*2+1]);
+    }
     
     vtkSmartPointer<vtkExtractVOI> voiFilter = vtkExtractVOI::New();
     voiFilter->SetInput(this->GetInput());
-- 
2.47.1