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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef I_SKY_H
#define I_SKY_H
#include "SkyLight.h"
#define CLOUD_SIZE 256 // must be divisible by 4 and 8
struct MapTextureData;
class ISky
{
public:
static ISky* GetSky();
virtual ~ISky();
virtual void Update() = 0;
virtual void UpdateSunDir() = 0;
virtual void UpdateSkyTexture() = 0;
virtual void Draw() = 0;
virtual void DrawSun() = 0;
virtual void SetLuaTexture(const MapTextureData& td) {}
void IncreaseCloudDensity() { cloudDensity *= 1.05f; }
void DecreaseCloudDensity() { cloudDensity *= 0.95f; }
float GetCloudDensity() const { return cloudDensity; }
ISkyLight* GetLight() const { return skyLight; }
void SetLight(bool dynamic);
bool SunVisible(const float3 pos) const;
/**
* Sets up OpenGL to draw fog or not, according to the value of
* globalRendering->drawFog.
*/
void SetupFog();
public:
bool wireframe;
bool dynamicSky;
float3 sundir1, sundir2; // (xvec, yvec) TODO: move these to SkyLight
float3 modSunDir;
float3 skyColor;
float3 sunColor;
float3 cloudColor;
float4 fogColor;
float fogStart;
float fogEnd;
float cloudDensity;
protected:
ISky();
ISkyLight* skyLight;
};
extern ISky* sky;
#endif // I_SKY_H
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