X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;ds=sidebyside;f=libctsim%2Fphantom.cpp;h=ac0fa4a83f76abc278d8f712b6941e13f2d6aa8b;hb=08a5cd04c3994d5ea24713b9b000791bd2e406fe;hp=d16bf5bb42e8d2e7d35a93cec3fc925f081c1aaa;hpb=c85a5b31119b4e0903144c55441717a7ad1e0b8b;p=ctsim.git

diff --git a/libctsim/phantom.cpp b/libctsim/phantom.cpp
index d16bf5b..ac0fa4a 100644
--- a/libctsim/phantom.cpp
+++ b/libctsim/phantom.cpp
@@ -9,7 +9,7 @@
 **  This is part of the CTSim program
 **  Copyright (C) 1983-2000 Kevin Rosenberg
 **
-**  $Id: phantom.cpp,v 1.12 2000/07/28 10:51:31 kevin Exp $
+**  $Id: phantom.cpp,v 1.13 2000/07/29 19:50:08 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
@@ -328,17 +328,16 @@ void
 Phantom::draw (SGP& sgp) const
 {
   double wsize = m_xmax - m_xmin;
-  double xmin = m_xmin;
-  double ymin = m_ymin;
-
   if ((m_ymax - m_ymin) > wsize) 
       wsize = m_ymax - m_ymin;
   wsize *= 1.01;
+  double halfWindow = wsize / 2;
+
+  double xcent = m_xmin + (m_xmax - m_xmin) / 2;
+  double ycent = m_ymin + (m_ymax - m_ymin) / 2;
 
-  double xmax = xmin + wsize;
-  double ymax = ymin + wsize; 
+  sgp.setWindow (xcent - halfWindow, ycent - halfWindow, xcent + halfWindow, ycent + halfWindow);
 
-  sgp.setWindow (xmin, ymin, xmax, ymax);
   for (PElemIterator i = m_listPElem.begin(); i != m_listPElem.end(); i++)
     sgp.polylineAbs ((*i)->xOutline(), (*i)->yOutline(), (*i)->nOutlinePoints());
 }