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    41 

    42 #ifndef LIGHT_H

    43 #define LIGHT_H

    44 

    45 #include <QtCore/qobject.h>

    46 #include <QtCore/qscopedpointer.h>

    47 #include <QtGui/qcolor.h>

    48 #include <QtGui/qvector3d.h>

    49 #include <QtGui/qvector4d.h>

    50 

    51 class LightPrivate;

    52 QT_BEGIN_NAMESPACE

    53 class QMatrix4x4;

    54 QT_END_NAMESPACE

    55 

    56 class Light : public QObject

    57 {

    58     Q_OBJECT

    59     Q_ENUMS(LightType)

    60     Q_PROPERTY(LightType type READ type)

    61     Q_PROPERTY(QVector3D position READ position WRITE setPosition NOTIFY positionChanged)

    62     Q_PROPERTY(QVector3D direction READ direction WRITE setDirection NOTIFY directionChanged)

    63     Q_PROPERTY(QColor ambientColor READ ambientColor WRITE setAmbientColor NOTIFY ambientColorChanged)

    64     Q_PROPERTY(QColor diffuseColor READ diffuseColor WRITE setDiffuseColor NOTIFY diffuseColorChanged)

    65     Q_PROPERTY(QColor specularColor READ specularColor WRITE setSpecularColor NOTIFY specularColorChanged)

    66     Q_PROPERTY(QVector3D spotDirection READ spotDirection WRITE setSpotDirection NOTIFY spotDirectionChanged)

    67     Q_PROPERTY(qreal spotExponent READ spotExponent WRITE setSpotExponent NOTIFY spotExponentChanged)

    68     Q_PROPERTY(qreal spotAngle READ spotAngle WRITE setSpotAngle NOTIFY spotAngleChanged)

    69     Q_PROPERTY(qreal constantAttenuation READ constantAttenuation WRITE setConstantAttenuation NOTIFY constantAttenuationChanged)

    70     Q_PROPERTY(qreal linearAttenuation READ linearAttenuation WRITE setLinearAttenuation NOTIFY linearAttenuationChanged)

    71     Q_PROPERTY(qreal quadraticAttenuation READ quadraticAttenuation WRITE setQuadraticAttenuation NOTIFY quadraticAttenuationChanged)

    72 public:

    73     enum LightType {

    74         Directional,

    75         Positional

    76     };

    77 

    78     Light(QObject *parent = 0);

    79     ~Light();

    80 

    81     Light::LightType type() const;

    82 

    83     QVector3D position() const;

    84     void setPosition(const QVector3D& value);

    85 

    86     QVector3D direction() const;

    87     void setDirection(const QVector3D& value);

    88 

    89     QColor ambientColor() const;

    90     void setAmbientColor(const QColor& value);

    91 

    92     QColor diffuseColor() const;

    93     void setDiffuseColor(const QColor& value);

    94 

    95     QColor specularColor() const;

    96     void setSpecularColor(const QColor& value);

    97 

    98     QVector3D spotDirection() const;

    99     void setSpotDirection(const QVector3D& value);

   100 

   101     qreal spotExponent() const;

   102     void setSpotExponent(qreal value);

   103 

   104     qreal spotAngle() const;

   105     void setSpotAngle(qreal value);

   106 

   107     qreal spotCosAngle() const;

   108 

   109     qreal constantAttenuation() const;

   110     void setConstantAttenuation(qreal value);

   111 

   112     qreal linearAttenuation() const;

   113     void setLinearAttenuation(qreal value);

   114 

   115     qreal quadraticAttenuation() const;

   116     void setQuadraticAttenuation(qreal value);

   117 

   118     QVector4D eyePosition(const QMatrix4x4& transform) const;

   119     QVector3D eyeSpotDirection(const QMatrix4x4& transform) const;

   120 

   121 Q_SIGNALS:

   122     void positionChanged();

   123     void directionChanged();

   124     void ambientColorChanged();

   125     void diffuseColorChanged();

   126     void specularColorChanged();

   127     void spotDirectionChanged();

   128     void spotExponentChanged();

   129     void spotAngleChanged();

   130     void constantAttenuationChanged();

   131     void linearAttenuationChanged();

   132     void quadraticAttenuationChanged();

   133     void lightChanged();

   134 

   135 private:

   136     QScopedPointer<LightPrivate> d_ptr;

   137 

   138     Q_DECLARE_PRIVATE(Light)

   139     Q_DISABLE_COPY(Light)

   140 };

   141 

   142 #endif