67     When the transformation is applied to a QGraphicsItem, it will be

    67     When the transformation is applied to a QGraphicsItem, it will be

    68     projected back to a 2D QTransform.  When multiple QGraphicsTransform

    68     projected back to a 2D QTransform.  When multiple QGraphicsTransform

    69     objects are applied to a QGraphicsItem, all of the transformations

    69     objects are applied to a QGraphicsItem, all of the transformations

    70     are computed in true 3D space, with the projection back to 2D

    70     are computed in true 3D space, with the projection back to 2D

    71     only occurring after the last QGraphicsTransform is applied.

    71     only occurring after the last QGraphicsTransform is applied.

    72 

    75 

    73     If you want to create your own configurable transformation, you can create

    76     If you want to create your own configurable transformation, you can create

    74     a subclass of QGraphicsTransform (or any or the existing subclasses), and

    77     a subclass of QGraphicsTransform (or any or the existing subclasses), and

    75     reimplement the pure virtual applyTo() function, which takes a pointer to a

    78     reimplement the pure virtual applyTo() function, which takes a pointer to a

    76     QMatrix4x4. Each operation you would like to apply should be exposed as

    79     QMatrix4x4. Each operation you would like to apply should be exposed as

    88 #include "qgraphicsitem_p.h"

    91 #include "qgraphicsitem_p.h"

    89 #include "qgraphicstransform_p.h"

    92 #include "qgraphicstransform_p.h"

    90 #include <QDebug>

    93 #include <QDebug>

    91 #include <QtCore/qmath.h>

    94 #include <QtCore/qmath.h>

    92 

    95 

    93 QT_BEGIN_NAMESPACE

    97 QT_BEGIN_NAMESPACE

    95 void QGraphicsTransformPrivate::setItem(QGraphicsItem *i)

    98 void QGraphicsTransformPrivate::setItem(QGraphicsItem *i)

    96 {

    99 {

    97     if (item == i)

   100     if (item == i)

    98         return;

   101         return;

    99 

   102 

   545 

   548 

   546     if (d->angle == 0. || d->axis.isNull())

   549     if (d->angle == 0. || d->axis.isNull())

   547         return;

   550         return;

   548 

   551 

   549     matrix->translate(d->origin);

   552     matrix->translate(d->origin);

   553     matrix->translate(-d->origin);

   554     matrix->translate(-d->origin);

   554 }

   555 }

   555 

   556 

   556 /*!

   557 /*!

   557     \fn void QGraphicsRotation::axisChanged()

   558     \fn void QGraphicsRotation::axisChanged()

   562 */

   563 */

   563 

   564 

   564 #include "moc_qgraphicstransform.cpp"

   565 #include "moc_qgraphicstransform.cpp"

   565 

   566 

   566 QT_END_NAMESPACE

   567 QT_END_NAMESPACE