Initial work on GL_MESA_sprite_point extension.

Still need to resolve clipping issues, finalize the spec.

src/mesa/main/state.c

@@ -1,4 +1,4 @@
-/* $Id: state.c,v 1.50 2000/11/28 00:07:51 brianp Exp $ */
+/* $Id: state.c,v 1.51 2000/12/08 00:20:15 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -781,6 +781,13 @@ void gl_update_state( GLcontext *ctx )
 	    ctx->_NeedEyeCoords |= NEED_EYE_LIGHT_MODELVIEW;
    }
 
+   /* point attenuation requires eye coords */
+   if (new_state & _NEW_POINT) {
+      if (ctx->Point._Attenuated) {
+         ctx->_NeedEyeCoords |= NEED_EYE_POINT_ATTEN;
+      }
+   }
+
    /* ctx->_NeedEyeCoords and ctx->_NeedEyeNormals are now uptodate.
     *
     * If the truth value of either has changed, update for the new