Skydome.h

#pragma once
#include <osg/Vec3>
#include <osg/Matrix>
#include <osg/StateSet>
#define PI 3.14159265

namespace osgCloudyDay
{
        class Skydome
        {
        public:
                Skydome(void);
                virtual ~Skydome(void)=0;

                /*
                 * Returns the actual lightposition
                 * @return light position
                 */
                osg::Vec3 GetLightPosition();
                /*
                 * Sets the light position
                 * @param pos new position of the light
                 */
                void SetLightPosition(osg::Vec3 pos);

                /*
                 * This method returns the weighting factor between scene and the light scattering effect
                 * @return inverse wavelength
                 */
                float GetLightScatteringWeight();
                /*
                 * This method sets the the weighting factor between scene and the light scattering effect
                 * @param weight weighting factor
                 */
                void SetLightScatteringWeight(float weight);

                /*
                 * This method returns the density factor for light scattering.
                 * @return density 
                 */
                float GetDensity();
                /*
                 * This method sets the the density factor for light scattering.
                 * @param density weighting factor
                 */
                void SetDensity(float weight);

                /*
                 * This method returns the decay factor for lightscattering
                 * @return decay factor for lightscattering
                 */
                float GetDecay();
                /*
                 * This method sets the the decay factor for light scattering
                 * @param decay factor for lightscattering
                 */
                void SetDecay(float weight);


                /*
                 * This method returns the exposure factor
                 * @return exposure factor
                 */
                float GetExposure();
                /*
                 * This method sets the the exposure factor
                 * @param exposure exporure factor for Tone Mapping
                 */
                void SetExposure(float exposure);

                virtual void SetupUniform(osg::StateSet* nodess4) = 0;

        private:
                osg::Vec3 m_lightPos;

                float m_weight;
                float m_exposure;
                float m_density;
                float m_decay;

        };
}