source: orxonox.OLD/branches/atmospheric_engine/src/lib/graphics/effects/cloud_effect.h @ 7913

/**
* @file cloud_effect.h
*/

#ifndef _CLOUD_EFFECT
#define _CLOUD_EFFECT

#include "vector.h"
#include "vector2D.h"

#include "weather_effect.h"

#include "sound_buffer.h"
#include "sound_source.h"

class CloudEffect : public WeatherEffect
{
        public:
                CloudEffect(const TiXmlElement* root = NULL);
                virtual ~CloudEffect();

                virtual void loadParams(const TiXmlElement* root);

                virtual bool init();

                virtual bool activate();
                virtual bool deactivate();

                virtual void draw() const;
                virtual void tick(float dt);

                inline void setCloudAnimation(float timestep) { this->cloudAnimTimeStep = timestep; }

        private:
                // Basic noise maps 32x32
                float                                                                                                           cloudMap32_a[32 * 32];
                float                                                                                                           cloudMap32_b[32 * 32];
                float                                                                                                           cloudMap32_c[32 * 32];

                // The cloud map 256x256
                float                                                                                                           cloudMap256[256 * 256];

                // Temporary array to hold texture RGB values 
                char                                                                                                                    cloudTexture[256][256][3];

                GLuint                                                                                                          texID[2];
                float                                                                                                           timer;

                bool                                                                                                                    cloudAnimTimeStep;

                float                                                                                                           noise(int x, int y, int random);
                float                                                                                                           interpolate(float x, float y, float  *map);
                void                                                                                                            overlapOctaves();
                void                                                                                                            expFilter();

                void                                                                                                            genNoiseMap(float  *map);
                void                                                                                                            genCloudTexture();
                void                                                                                                            calcAnimMap(float timer);

};

#endif  /* _CLOUD_EFFECT */