light.h Example File

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 #ifndef LIGHT_H
 #define LIGHT_H

 #include <QtCore/qobject.h>
 #include <QtCore/qscopedpointer.h>
 #include <QtGui/qcolor.h>
 #include <QtGui/qvector3d.h>
 #include <QtGui/qvector4d.h>

 class LightPrivate;
 class QMatrix4x4;

 class Light : public QObject
 {
     Q_OBJECT
     Q_ENUMS(LightType)
     Q_PROPERTY(LightType type READ type)
     Q_PROPERTY(QVector3D position READ position WRITE setPosition NOTIFY positionChanged)
     Q_PROPERTY(QVector3D direction READ direction WRITE setDirection NOTIFY directionChanged)
     Q_PROPERTY(QColor ambientColor READ ambientColor WRITE setAmbientColor NOTIFY ambientColorChanged)
     Q_PROPERTY(QColor diffuseColor READ diffuseColor WRITE setDiffuseColor NOTIFY diffuseColorChanged)
     Q_PROPERTY(QColor specularColor READ specularColor WRITE setSpecularColor NOTIFY specularColorChanged)
     Q_PROPERTY(QVector3D spotDirection READ spotDirection WRITE setSpotDirection NOTIFY spotDirectionChanged)
     Q_PROPERTY(qreal spotExponent READ spotExponent WRITE setSpotExponent NOTIFY spotExponentChanged)
     Q_PROPERTY(qreal spotAngle READ spotAngle WRITE setSpotAngle NOTIFY spotAngleChanged)
     Q_PROPERTY(qreal constantAttenuation READ constantAttenuation WRITE setConstantAttenuation NOTIFY constantAttenuationChanged)
     Q_PROPERTY(qreal linearAttenuation READ linearAttenuation WRITE setLinearAttenuation NOTIFY linearAttenuationChanged)
     Q_PROPERTY(qreal quadraticAttenuation READ quadraticAttenuation WRITE setQuadraticAttenuation NOTIFY quadraticAttenuationChanged)
 public:
     enum LightType {
         Directional,
         Positional
     };

     Light(QObject *parent = 0);
     ~Light();

     Light::LightType type() const;

     QVector3D position() const;
     void setPosition(const QVector3D& value);

     QVector3D direction() const;
     void setDirection(const QVector3D& value);

     QColor ambientColor() const;
     void setAmbientColor(const QColor& value);

     QColor diffuseColor() const;
     void setDiffuseColor(const QColor& value);

     QColor specularColor() const;
     void setSpecularColor(const QColor& value);

     QVector3D spotDirection() const;
     void setSpotDirection(const QVector3D& value);

     qreal spotExponent() const;
     void setSpotExponent(qreal value);

     qreal spotAngle() const;
     void setSpotAngle(qreal value);

     qreal spotCosAngle() const;

     qreal constantAttenuation() const;
     void setConstantAttenuation(qreal value);

     qreal linearAttenuation() const;
     void setLinearAttenuation(qreal value);

     qreal quadraticAttenuation() const;
     void setQuadraticAttenuation(qreal value);

     QVector4D eyePosition(const QMatrix4x4& transform) const;
     QVector3D eyeSpotDirection(const QMatrix4x4& transform) const;

 Q_SIGNALS:
     void positionChanged();
     void directionChanged();
     void ambientColorChanged();
     void diffuseColorChanged();
     void specularColorChanged();
     void spotDirectionChanged();
     void spotExponentChanged();
     void spotAngleChanged();
     void constantAttenuationChanged();
     void linearAttenuationChanged();
     void quadraticAttenuationChanged();
     void lightChanged();

 private:
     QScopedPointer<LightPrivate> d_ptr;

     Q_DECLARE_PRIVATE(Light)
     Q_DISABLE_COPY(Light)
 };

 #endif