1 /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2  *
3  * This library is open source and may be redistributed and/or modified under
4  * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5  * (at your option) any later version.  The full license is in LICENSE file
6  * included with this distribution, and on the openscenegraph.org website.
7  *
8  * This library is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * OpenSceneGraph Public License for more details.
12 */
13 
14 #include <osg/AlphaFunc>
15 #include <osg/Notify>
16 
17 using namespace osg;
18 
AlphaFunc()19 AlphaFunc::AlphaFunc()
20 {
21     _comparisonFunc = ALWAYS;
22     _referenceValue = 1.0f;
23 }
24 
25 
~AlphaFunc()26 AlphaFunc::~AlphaFunc()
27 {
28 }
29 
apply(State &) const30 void AlphaFunc::apply(State&) const
31 {
32 #ifdef OSG_GL_FIXED_FUNCTION_AVAILABLE
33     glAlphaFunc((GLenum)_comparisonFunc,_referenceValue);
34 #else
35     OSG_NOTICE<<"Warning: AlphaFunc::apply(State&) - not supported."<<std::endl;
36 #endif
37 }
38 
39