/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2008-2012 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>
*/
#ifndef OSGEARTH_NOISE_TERRAIN_EFFECT_H
#define OSGEARTH_NOISE_TERRAIN_EFFECT_H

#include <osgEarth/TerrainEffect>
#include <osg/Uniform>
#include <osg/Texture2D>

using namespace osgEarth;

namespace osgEarth { namespace Noise
{
    /**
     * Effect that activates a multi-resolution noise texture on the terrain.
     */
    class NoiseTerrainEffect : public TerrainEffect
    {
    public:
        /** construct a new terrain effect. */
        NoiseTerrainEffect(const osgDB::Options* dbOptions);


    public: // TerrainEffect interface

        void onInstall(TerrainEngineNode* engine);

        void onUninstall(TerrainEngineNode* engine);


    protected:
        virtual ~NoiseTerrainEffect() { }

        osg::Texture* createNoiseTexture() const;

        int                          _texImageUnit;
        osg::ref_ptr<osg::Texture>   _tex;
        osg::ref_ptr<osg::Uniform>   _samplerUniform;
    };

} } // namespace osgEarth::Noise

#endif // OSGEARTH_NOISE_TERRAIN_EFFECT_H
