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#ifndef CAMERA_H

#define CAMERA_H

#include <QtCore/qobject.h>

#include <QtCore/qsize.h>

#include <QtGui/qvector3d.h>

#include <QtGui/qmatrix4x4.h>

#include <QtGui/qquaternion.h>

class CameraPrivate;

class QGLPainter;

class Camera : public QObject

{

    Q_OBJECT

    Q_ENUMS(ProjectionType)

    Q_PROPERTY(ProjectionType projectionType READ projectionType WRITE setProjectionType NOTIFY projectionChanged)

    Q_PROPERTY(qreal fieldOfView READ fieldOfView WRITE setFieldOfView NOTIFY projectionChanged)

    Q_PROPERTY(qreal nearPlane READ nearPlane WRITE setNearPlane NOTIFY projectionChanged)

    Q_PROPERTY(qreal farPlane READ farPlane WRITE setFarPlane NOTIFY projectionChanged)

    Q_PROPERTY(QSizeF viewSize READ viewSize WRITE setViewSize NOTIFY projectionChanged)

    Q_PROPERTY(QSizeF minViewSize READ minViewSize WRITE setMinViewSize NOTIFY projectionChanged)

    Q_PROPERTY(int screenRotation READ screenRotation WRITE setScreenRotation NOTIFY projectionChanged)

    Q_PROPERTY(qreal xEye READ xEye WRITE setXEye NOTIFY viewChanged)

    Q_PROPERTY(qreal yEye READ yEye WRITE setYEye NOTIFY viewChanged)

    Q_PROPERTY(qreal zEye READ zEye WRITE setZEye NOTIFY viewChanged)

    Q_PROPERTY(QVector3D eye READ eye WRITE setEye NOTIFY viewChanged)

    Q_PROPERTY(QVector3D upVector READ upVector WRITE setUpVector NOTIFY viewChanged)

    Q_PROPERTY(qreal xCentre READ xCentre WRITE setXCentre NOTIFY viewChanged)

    Q_PROPERTY(qreal yCentre READ yCentre WRITE setYCentre NOTIFY viewChanged)

    Q_PROPERTY(qreal zCentre READ zCentre WRITE setZCentre NOTIFY viewChanged)

    Q_PROPERTY(QVector3D center READ center WRITE setCenter NOTIFY viewChanged)

    Q_PROPERTY(qreal eyeSeparation READ eyeSeparation WRITE setEyeSeparation NOTIFY viewChanged)

    Q_PROPERTY(QVector3D motionAdjustment READ motionAdjustment WRITE setMotionAdjustment DESIGNABLE false NOTIFY viewChanged)

    Q_PROPERTY(bool adjustForAspectRatio READ adjustForAspectRatio WRITE setAdjustForAspectRatio NOTIFY viewChanged)

public:

    explicit Camera(QObject *parent = 0);

    ~Camera();

    enum ProjectionType

    {

        Perspective,

        Orthographic

    };

    Camera::ProjectionType projectionType() const;

    void setProjectionType(Camera::ProjectionType value);

    qreal fieldOfView() const;

    void setFieldOfView(qreal angle);

    qreal nearPlane() const;

    void setNearPlane(qreal value);

    qreal farPlane() const;

    void setFarPlane(qreal value);

    QSizeF viewSize() const;

    void setViewSize(const QSizeF& size);

    QSizeF minViewSize() const;

    void setMinViewSize(const QSizeF& size);

    int screenRotation() const;

    void setScreenRotation(int angle);

    qreal xEye() const;

    void setXEye(qreal value);

    qreal yEye() const;

    void setYEye(qreal value);

    qreal zEye() const;

    void setZEye(qreal value);

    QVector3D eye() const;

    void setEye(const QVector3D& vertex);

    QVector3D upVector() const;

    void setUpVector(const QVector3D& vector);

    qreal xCentre() const;

    void setXCentre(qreal value);

    qreal yCentre() const;

    void setYCentre(qreal value);

    qreal zCentre() const;

    void setZCentre(qreal value);

    QVector3D center() const;

    void setCenter(const QVector3D& vertex);

    qreal eyeSeparation() const;

    void setEyeSeparation(qreal value);

    QVector3D motionAdjustment() const;

    void setMotionAdjustment(const QVector3D& vector);

    bool adjustForAspectRatio() const;

    void setAdjustForAspectRatio(bool value);

    QQuaternion tilt(qreal angle) const;

    QQuaternion pan(qreal angle) const;

    QQuaternion roll(qreal angle) const;

    void rotateEye(const QQuaternion& q);

    void rotateCenter(const QQuaternion& q);

    QVector3D translation(qreal x, qreal y, qreal z) const;

    void translateEye(const QVector3D& vector);

    void translateCenter(const QVector3D& vector);

    QMatrix4x4 projectionMatrix(qreal aspectRatio) const;

    QMatrix4x4 modelViewMatrix() const;

Q_SIGNALS:

    void projectionChanged();

    void viewChanged();

private:

    CameraPrivate *d_ptr;

    CameraPrivate *d_func() const { return d_ptr; }

    Q_DISABLE_COPY(Camera)

};

#endif