52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osg/GLExtensions>
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#include <osg/State>
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#include <osg/Fog>
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using namespace osg;
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#ifndef GL_FOG_COORDINATE_SOURCE
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#define GL_FOG_COORDINATE_SOURCE 0x8450
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#endif
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Fog::Fog()
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{
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_mode = EXP;
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_density = 1.0f;
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_start = 0.0f;
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_end = 1.0f;
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_color.set( 0.0f, 0.0f, 0.0f, 0.0f);
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_fogCoordinateSource = FRAGMENT_DEPTH;
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}
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Fog::~Fog()
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{
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}
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void Fog::apply(State& state) const
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{
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glFogi( GL_FOG_MODE, _mode );
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glFogf( GL_FOG_DENSITY, _density );
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glFogf( GL_FOG_START, _start );
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glFogf( GL_FOG_END, _end );
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glFogfv( GL_FOG_COLOR, (GLfloat*)_color.ptr() );
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static bool fogCoordExtensionSuppoted = osg::isGLExtensionSupported(state.getContextID(),"GL_EXT_fog_coord");
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if (fogCoordExtensionSuppoted)
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{
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glFogi(GL_FOG_COORDINATE_SOURCE,_fogCoordinateSource);
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}
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}
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