From 5441622a28a2bad6b817e2c8d6c0673593d0ce50 Mon Sep 17 00:00:00 2001
From: ehofman <ehofman>
Date: Thu, 26 Jan 2006 09:37:32 +0000
Subject: [PATCH] Add support for point sprites.

---
 src/Main/renderer.cxx | 9 ++++++++-
 src/Main/renderer.hxx | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/Main/renderer.cxx b/src/Main/renderer.cxx
index b2aa80f21..37a74def7 100644
--- a/src/Main/renderer.cxx
+++ b/src/Main/renderer.cxx
@@ -91,6 +91,7 @@ float scene_farplane = 120000.0f;
 glPointParameterfProc glPointParameterfPtr = 0;
 glPointParameterfvProc glPointParameterfvPtr = 0;
 bool glPointParameterIsSupported = false;
+bool glPointSpriteIsSupported = false;
 
 
 // fog constants.  I'm a little nervous about putting actual code out
@@ -226,7 +227,13 @@ FGRenderer::init( void ) {
     glFrontFace ( GL_CCW );
 
     // Just testing ...
-    glEnable(GL_POINT_SMOOTH);
+    if ( SGIsOpenGLExtensionSupported("GL_ARB_point_sprite") ||
+         SGIsOpenGLExtensionSupported("GL_NV_point_sprite") )
+    {
+        glEnable(GL_POINT_SPRITE);
+        glEnable(GL_POINT_SMOOTH);
+        glPointSpriteIsSupported = true;
+    }
     glEnable(GL_LINE_SMOOTH);
     // glEnable(GL_POLYGON_SMOOTH);      
     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
diff --git a/src/Main/renderer.hxx b/src/Main/renderer.hxx
index de33b114a..c638a35a3 100644
--- a/src/Main/renderer.hxx
+++ b/src/Main/renderer.hxx
@@ -13,6 +13,7 @@ extern SGSky *thesky;
 extern glPointParameterfProc glPointParameterfPtr;
 extern glPointParameterfvProc glPointParameterfvPtr;
 extern bool glPointParameterIsSupported;
+extern bool glPointSpriteIsSupported;
 
 
 class FGRenderer {