From 165cc1bf4296db3844aed6283a47b1e6c1635be3 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Tue, 28 May 2002 11:39:51 +0000
Subject: [PATCH] Changed the method of expanding of the near and far planes in
 CullVisitor::popProjectionMatrix so that it better handled models of zero
 thickness orthogonal to the viewing direction.

---
 src/osgUtil/CullVisitor.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/osgUtil/CullVisitor.cpp b/src/osgUtil/CullVisitor.cpp
index 9b4f25588..97a104737 100644
--- a/src/osgUtil/CullVisitor.cpp
+++ b/src/osgUtil/CullVisitor.cpp
@@ -224,8 +224,8 @@ void CullVisitor::popProjectionMatrix()
         // so it doesn't cull them out.
         osg::Matrix& projection = *_projectionStack.back();
 
-        double desired_znear = _computed_znear;
-        double desired_zfar = _computed_zfar;
+        double desired_znear = _computed_znear*0.98f;
+        double desired_zfar = _computed_zfar*1.02f;
 
         double min_near_plane = _computed_zfar*0.0005f;
         if (desired_znear<min_near_plane) desired_znear=min_near_plane;
@@ -233,7 +233,7 @@ void CullVisitor::popProjectionMatrix()
         double trans_near_plane = (-desired_znear*projection(2,2)+projection(3,2))/(-desired_znear*projection(2,3)+projection(3,3));
         double trans_far_plane = (-desired_zfar*projection(2,2)+projection(3,2))/(-desired_zfar*projection(2,3)+projection(3,3));
 
-        double ratio = fabs(2.0f/(trans_near_plane-trans_far_plane))*0.95;
+        double ratio = fabs(2.0f/(trans_near_plane-trans_far_plane));
         double center = -(trans_near_plane+trans_far_plane)/2.0f;
 
         projection.postMult(osg::Matrix(1.0f,0.0f,0.0f,0.0f,