khanat-code-old/code/ryzom/client/src/light_cycle_manager.h

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// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef CL_LIGHT_CYCLE_MANAGER_H
#define CL_LIGHT_CYCLE_MANAGER_H
/////////////
// INCLUDE //
/////////////
// Misc.
#include "nel/misc/types_nl.h"
#include "nel/misc/rgba.h"
// 3D Interface.
#include "nel/3d/u_driver.h"
#include "nel/3d/u_light.h"
#include "game_share/dir_light_setup.h"
#include "ig_enum.h"
///////////
// USING //
///////////
namespace NL3D
{
class UScene;
}
/// Description of the hours for days / night
struct CLightCycleDesc
{
float RealDayLength; // real length of the day, in seconds
float NumHours; // number of ryzom hours in a day
float NightTransitionStartHour; // start of night transition
float NightTransitionEndHour; // end of night transition
float DuskRatio; // ratio for dusk transition. e.g. when set to 0.5f, that means that the dusk colors are taken when the day->night transition is at its half
float DawnTransitionStartHour; // start of dawn transition
float DawnTransitionEndHour; // end of dawn transition
uint MaxNumColorSteps; // the max number of color steps
//
float getNightTransitionLength() const;
float getDawnTransitionLength() const;
};
class CWeatherManagerClient;
/**
* This class manage the weather and the time.
* \author Guillaume PUZIN
* \author Nicolas Vizerie
* \author Nevrax France
* \date 2001
*/
class CLightCycleManager : public IIGObserver
{
public:
enum TLightState { Day = 0, Night, DayToNight, NightToDay, StateUnknown };
public:
/// ctor
CLightCycleManager();
/** Set the description of the light cycle
* This also reset the hour to 0
* \param desc description of lighting intervals
* \return true If the desc was valid (not overlapping transitions..)
*/
bool setLightDesc(const CLightCycleDesc &desc);
// get the current light desc
const CLightCycleDesc &getLightDesc() const { return _Desc; }
/** Set the current hour, and change color if necessary.
* The caller can provide an additionnal lightning color if he want
* NB : the weather manager is needed if the lighting needs to be overriden in case of bad weather
*/
void setHour(float hour, const CWeatherManagerClient &wm, NLMISC::CRGBA lightningColor);
//
float getHour() const { return _Hour; }
// Get the last computed light level in a call to setHour (from 0 fro day to 1 for night)
float getLightLevel() const { return _LightLevel; }
/// Create driver directionnal light light
void create();
/** Touch the light setup.
* The landscape patch are recomputed
*/
void touch();
/// Get needed landscape update freq (or 0 if the setupped lightDesc was not valid)
float getLandscapePatchUpdateFreq() const;
/// Returns a string that describ the current state (day, night, ...)
std::string getStateString() const;
// Returns an enum that describe the current state
TLightState getState() const
{
return _State;
}
/// Test if a day->night or night->day transition is currently occuring
bool isInTransition() const;
/// From IIGObserver
virtual void instanceGroupLoaded(NL3D::UInstanceGroup * /* ig */) { }
virtual void instanceGroupAdded(NL3D::UInstanceGroup *ig);
virtual void instanceGroupRemoved(NL3D::UInstanceGroup * /* ig */) { }
/// get the light level at the given hour
float getLightLevel(float hour) const;
///////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////
private:
float _Hour;
bool _Touched;
bool _ValidDesc;
NLMISC::CRGBA _LastDiffuse, _LastAmbient;
CLightCycleDesc _Desc;
float _LightLevel;
float _WeatherLighting, _LastWeatherLighting;
float _UpdateFreq;
TLightState _State;
TLightState _PrevState;
private:
void getLandscapeLightColor(NLMISC::CRGBA &diffuse, NLMISC::CRGBA &ambiant);
static bool isInInterval(float start, float end, float value);
static bool isInDayInterval(float startHour, float endHour, float dayDuration, float hour, float &ratio);
void setDirLight(const CDirLightSetup &setup0, const CDirLightSetup &setup1, float level, float intensity, NL3D::UScene &scene);
// get the number of hours for a landscape patch update
float getUpdateDuration() const;
/// Set the light to render the canopy or the sky
void setupCanopyLight(float intensity);
/// Set the light to render the main scene
void setupMainLight(float intensity);
// Setup light for canopy or main scene
void setupDayToNightLight(NL3D::UScene &scene, const CDirLightSetup &dayLight, const CDirLightSetup &duskLight, const CDirLightSetup &nightLight, float lightIntensity);
// Update the '_State' field
void updateState();
};
#endif // LIGHT_CYCLE_MANAGER
/* End of weather.h */