From 1e6aa4b40fcd9abeed6c3c28843bb58e07afc49d Mon Sep 17 00:00:00 2001
From: fredb <fredb>
Date: Sun, 14 Mar 2010 09:24:12 +0000
Subject: [PATCH] Precipitation inside cockpit temporary fix. Needs a clip
 distance settable to take account of views and different cockpit size.

---
 simgear/environment/precipitation.cxx | 18 ++++++++++++++++--
 simgear/environment/precipitation.hxx |  1 +
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/simgear/environment/precipitation.cxx b/simgear/environment/precipitation.cxx
index 05b1b447..075fac1d 100644
--- a/simgear/environment/precipitation.cxx
+++ b/simgear/environment/precipitation.cxx
@@ -28,6 +28,7 @@
 #include "visual_enviro.hxx"
 
 #include <simgear/constants.h>
+#include <osg/ClipNode>
 
 /**
  * @brief SGPrecipitation constructor
@@ -35,7 +36,7 @@
  * Build a new OSG object from osgParticle.
  */
 SGPrecipitation::SGPrecipitation() :
-    _freeze(false), _snow_intensity(0.0), _rain_intensity(0.0)
+    _freeze(false), _snow_intensity(0.0), _rain_intensity(0.0), _clip_distance(5.0)
 {
     _precipitationEffect = new osgParticle::PrecipitationEffect;
 }
@@ -54,7 +55,20 @@ osg::Group* SGPrecipitation::build(void)
     _precipitationEffect->snow(0);	
     _precipitationEffect->rain(0);	
 
-    group->addChild(_precipitationEffect.get());
+    if (_clip_distance!=0.0)
+    {    
+        osg::ref_ptr<osg::ClipNode> clipNode = new osg::ClipNode;
+        clipNode->addClipPlane( new osg::ClipPlane( 0 ) );
+        clipNode->getClipPlane(0)->setClipPlane( 0.0, 0.0, -1.0, -_clip_distance );
+        clipNode->setReferenceFrame(osg::ClipNode::ABSOLUTE_RF);
+        clipNode->addChild(_precipitationEffect.get());
+
+        group->addChild(clipNode.get());
+    }
+    else
+    {
+        group->addChild(_precipitationEffect.get());
+    }
 
     return group;
 }
diff --git a/simgear/environment/precipitation.hxx b/simgear/environment/precipitation.hxx
index 80a08aea..bcf568c6 100644
--- a/simgear/environment/precipitation.hxx
+++ b/simgear/environment/precipitation.hxx
@@ -39,6 +39,7 @@ private:
 
     float _snow_intensity;
     float _rain_intensity;
+    float _clip_distance;
 	
     int _wind_dir;
     osg::Vec3 _wind_vec;
-- 
2.39.5