From 22ca8d2160f9c22bbcc5716e244cffca7b44d547 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 8 Jan 2010 11:37:35 +0000
Subject: [PATCH] From Marius Heise, "osgShadow was using single precision
 variables for light positioning and orientation. This was causing precision
 problems (shadow jumping) with big databases (eg. geocentric created vpb).
 This patch fixes this by using double precision variables for light
 positioning and orientation. It works for all algorithms dreived form
 osgShadow::StandardShadowMap. "

---
 src/osgShadow/StandardShadowMap.cpp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/osgShadow/StandardShadowMap.cpp b/src/osgShadow/StandardShadowMap.cpp
index a5aaa7522..fe1f34307 100644
--- a/src/osgShadow/StandardShadowMap.cpp
+++ b/src/osgShadow/StandardShadowMap.cpp
@@ -677,7 +677,7 @@ void StandardShadowMap::ViewData::aimShadowCastingCamera(
 
     if( light->getSpotCutoff() < 180.0f) // spotlight, no need for bounding box
     {
-        osg::Vec3 position(lightPos.x(), lightPos.y(), lightPos.z());
+        osg::Vec3d position(lightPos.x(), lightPos.y(), lightPos.z());
         float spotAngle = light->getSpotCutoff();
 
         projection.makePerspective( spotAngle, 1.0, 0.1, 1000.0);        
@@ -687,14 +687,15 @@ void StandardShadowMap::ViewData::aimShadowCastingCamera(
     {
         if (lightPos[3]!=0.0)   // point light
         {
-            osg::Vec3 position(lightPos.x(), lightPos.y(), lightPos.z());
+            osg::Vec3d position(lightPos.x(), lightPos.y(), lightPos.z());
 
             float centerDistance = (position-bs.center()).length();
 
             float znear = centerDistance-bs.radius();
             float zfar  = centerDistance+bs.radius();
             float zNearRatio = 0.001f;
-            if (znear<zfar*zNearRatio) znear = zfar*zNearRatio;
+            if (znear<zfar*zNearRatio)
+                znear = zfar*zNearRatio;
 
             float top   = (bs.radius()/centerDistance)*znear;
             float right = top;
@@ -708,7 +709,7 @@ void StandardShadowMap::ViewData::aimShadowCastingCamera(
 
             // set the position far away along the light direction
             float radius = bs.radius();
-            osg::Vec3 position = bs.center() - lightDir * radius * 2;
+            osg::Vec3d position = bs.center() - lightDir * radius * 2;
 
             float centerDistance = (position-bs.center()).length();