vislight.h

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#pragma once
 
/*+
________________________________________________________________________
 
 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        Kristofer Tingdahl
 Date:          4-11-2002
 RCS:           $Id$
________________________________________________________________________
 
 
-*/
 
#include "visbasemod.h"
#include "visdata.h"
#include "visnodestate.h"
#include "visosg.h"
 
 
namespace osg
{
    class Light;
 }
 
namespace visBase
{
 
mExpClass( visBase ) Light : public NodeState
{
public:
                        Light();
    void                setLightNum(int);
    int                 getLightNum() const;
 
    void                turnOn(bool n)  { ison_ = n; updateLights(); }
    bool                isOn() const    { return ison_; }
 
    void                setAmbient(float);
    float               getAmbient() const;
 
    void                setDiffuse(float);
    float               getDiffuse() const;
 
    void                setDirection(float x,float y,float z);
    float               direction(int dim) const;
    void                fillPar( IOPar& ) const;
    bool                usePar( const IOPar& );
 
 
protected:
                                ~Light();
    void                        updateLights();
    void                        initLight();
    bool                        ison_;
    float                       ambient_;
    float                       diffuse_;
    osg::Light*                 light_;
 
    static const char*  sKeyIsOn();
    static const char*  sKeyAmbient();
    static const char*  sKeyDiffuse();
    static const char*  sKeyLightNum();
    static const char*  sKeyDirection();
private:
    void                        applyAttribute(
                                osg::StateSet*,osg::StateAttribute*);
};
 
 
} //visBase