From 44de0e1df47cc3976c87273eff2693278f64e185 Mon Sep 17 00:00:00 2001
From: Frederic Bouvier <fredfgfs01@free.fr>
Date: Wed, 4 Apr 2012 20:43:16 +0200
Subject: [PATCH] Honor /sim/rendering/shadows/enabled preference

---
 src/Main/renderer.cxx | 33 +++++++++++++++++++++++++++++++--
 src/Main/renderer.hxx |  1 +
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/src/Main/renderer.cxx b/src/Main/renderer.cxx
index cdbcfaee3..2cb3c4b82 100644
--- a/src/Main/renderer.cxx
+++ b/src/Main/renderer.cxx
@@ -453,12 +453,20 @@ public:
     }
 };
 
+class ShadowEnabledListener : public SGPropertyChangeListener {
+public:
+    virtual void valueChanged(SGPropertyNode* node) {
+        globals->get_renderer()->enableShadows(node->getBoolValue());
+    }
+};
+
 void
 FGRenderer::init( void )
 {
 	_classicalRenderer = !fgGetBool("/sim/rendering/rembrandt", false);
     _shadowMapSize    = fgGetInt( "/sim/rendering/shadows/map-size", 4096 );
     fgAddChangeListener( new ShadowMapSizeListener, "/sim/rendering/shadows/map-size" );
+    fgAddChangeListener( new ShadowEnabledListener, "/sim/rendering/shadows/enabled" );
     _scenery_loaded   = fgGetNode("/sim/sceneryloaded", true);
     _scenery_override = fgGetNode("/sim/sceneryloaded-override", true);
     _panel_hotspots   = fgGetNode("/sim/panel-hotspots", true);
@@ -817,7 +825,10 @@ osg::Camera* FGRenderer::buildDeferredShadowCamera( flightgear::CameraInfo* info
         shadowSwitch->addChild( cascadeCam );
         info->shadowTexGen[i] = new osg::TexGen;
     }
-    shadowSwitch->setAllChildrenOn();
+    if (fgGetBool("/sim/rendering/shadows/enabled", true))
+        shadowSwitch->setAllChildrenOn();
+    else
+        shadowSwitch->setAllChildrenOff();
 
     return mainShadowCamera;
 }
@@ -858,7 +869,7 @@ void FGRenderer::updateShadowCamera(const flightgear::CameraInfo* info, const os
         up.normalize();
         dir.normalize();
         // cos(100 deg) == -0.17
-        if (up * dir < -0.17 ) {
+        if (up * dir < -0.17 || !fgGetBool("/sim/rendering/shadows/enabled", true)) {
             shadowSwitch->setAllChildrenOff();
         } else {
             double left,right,bottom,top,zNear,zFar;
@@ -933,6 +944,24 @@ void FGRenderer::updateShadowMapSize(int mapSize)
     }
 }
 
+void FGRenderer::enableShadows(bool enabled)
+{
+    for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
+            ii != CameraGroup::getDefault()->camerasEnd();
+            ++ii )
+    {
+        CameraInfo* info = ii->get();
+        Camera* camera = info->getCamera(SHADOW_CAMERA);
+        if (camera == 0) continue;
+
+        osg::Switch* shadowSwitch = camera->getChild(0)->asSwitch();
+        if (enabled)
+            shadowSwitch->setAllChildrenOn();
+        else
+            shadowSwitch->setAllChildrenOff();
+    }
+}
+
 #define STRINGIFY(x) #x
 #define TOSTRING(x) STRINGIFY(x)
 
diff --git a/src/Main/renderer.hxx b/src/Main/renderer.hxx
index 819745538..664d6c32a 100644
--- a/src/Main/renderer.hxx
+++ b/src/Main/renderer.hxx
@@ -106,6 +106,7 @@ public:
 
     void updateShadowCamera(const flightgear::CameraInfo* info, const osg::Vec3d& position);
     void updateShadowMapSize(int mapSize);
+    void enableShadows(bool enabled);
 
     SGSky* getSky() const { return _sky; }
 
-- 
2.39.5