From 2be37c04fe1fb95841aadc33f7468208e64c32cd Mon Sep 17 00:00:00 2001
From: ehofman <ehofman>
Date: Sat, 13 Sep 2003 09:27:50 +0000
Subject: [PATCH] Enable two sided lighting calculations when specular
 highlight is enabled

---
 src/Main/main.cxx | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/src/Main/main.cxx b/src/Main/main.cxx
index 4332c28cd..947f495a0 100644
--- a/src/Main/main.cxx
+++ b/src/Main/main.cxx
@@ -333,12 +333,6 @@ void trRenderFrame( void ) {
     glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
     glLightModeli( GL_LIGHT_MODEL_LOCAL_VIEWER, GL_FALSE );
 
-    if (fgGetBool("/sim/rendering/specular-highlight")) {
-        glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
-    } else {
-        glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SINGLE_COLOR);
-    }
-
     ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
 
     // texture parameters
@@ -615,13 +609,6 @@ void fgRenderFrame() {
         // a completely dark scene.  So, we set GL_LIGHT_MODEL_AMBIENT
         // explicitely to black.
         glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
-        if (fgGetBool("/sim/rendering/specular-highlight")) {
-            glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL,
-                          GL_SEPARATE_SPECULAR_COLOR);
-        } else {
-            glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL,
-			  GL_SINGLE_COLOR);
-        }
 
         ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
         ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
@@ -1302,6 +1289,13 @@ static void fgMainLoop( void ) {
 
     // END Tile Manager udpates
 
+    if (fgGetBool("/sim/rendering/specular-highlight")) {
+        glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);        glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
+    } else {
+        glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SINGLE_COLOR);
+         glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_FALSE);
+    }
+
     // redraw display
     fgRenderFrame();