QMorphingAnimation Class

(Qt3DAnimation::QMorphingAnimation)

A class implementing blend-shape morphing animation More...

Header: #include <QMorphingAnimation>
qmake: QT += 3danimation
Since: Qt 5.9
Instantiated By: MorphingAnimation
Inherits: Qt3DAnimation::QAbstractAnimation

Public Types

enum Method { Normalized, Relative }

Properties

Public Functions

QMorphingAnimation(QObject *parent = nullptr)
void addMorphTarget(Qt3DAnimation::QMorphTarget *target)
QEasingCurve easing() const
QVector<float> getWeights(int positionIndex)
float interpolator() const
QMorphingAnimation::Method method() const
QVector<Qt3DAnimation::QMorphTarget *> morphTargetList()
void removeMorphTarget(Qt3DAnimation::QMorphTarget *target)
void setMorphTargets(const QVector<Qt3DAnimation::QMorphTarget *> &targets)
void setWeights(int positionIndex, const QVector<float> &weights)
Qt3DRender::QGeometryRenderer *target() const
QString targetName() const
QVector<float> targetPositions() const

Public Slots

void setEasing(const QEasingCurve &easing)
void setMethod(QMorphingAnimation::Method method)
void setTarget(Qt3DRender::QGeometryRenderer *target)
void setTargetName(const QString name)
void setTargetPositions(const QVector<float> &targetPositions)

Signals

void easingChanged(const QEasingCurve &easing)
void interpolatorChanged(float interpolator)
void methodChanged(QMorphingAnimation::Method method)
void targetChanged(Qt3DRender::QGeometryRenderer *target)
void targetNameChanged(const QString &name)
void targetPositionsChanged(const QVector<float> &targetPositions)

Additional Inherited Members

Detailed Description

A class implementing blend-shape morphing animation

A Qt3DAnimation::QMorphingAnimation class implements blend-shape morphing animation to a target QGeometryRenderer. The QMorphingAnimation sets the correct QAttributes from the morph targets to the target QGeometryRenderer::geometry and calculates interpolator for the current position. The actual blending between the attributes must be implemented in the material. Qt3DAnimation::QMorphPhongMaterial implements material with morphing support for phong lighting model. The blending happens between 2 attributes - 'base' and 'target'. The names for the base and target attributes are taken from the morph target names, where the base attribute retains the name it already has and the target attribute name gets 'Target' appended to the name. The interpolator can be set as a QParameter to the used material. All morph targets in the animation should contain the attributes with same names as those in the base geometry.

Member Type Documentation

enum QMorphingAnimation::Method

This enumeration specifies the morphing method.

ConstantValueDescription
Qt3DAnimation::QMorphingAnimation::Normalized0The blending should use the normalized formula; V' = Vbase * (1.0 - sum(Wi)) + sum[Vi * Wi]
Qt3DAnimation::QMorphingAnimation::Relative1The blending should use the relative formula; V' = Vbase + sum[Vi * Wi]

Property Documentation

easing : QEasingCurve

Holds the easing curve of the interpolator between morph targets.

Access functions:

QEasingCurve easing() const
void setEasing(const QEasingCurve &easing)

Notifier signal:

void easingChanged(const QEasingCurve &easing)

interpolator : const float

Holds the interpolator between base and target attributes.

Access functions:

float interpolator() const

Notifier signal:

void interpolatorChanged(float interpolator)

method : QMorphingAnimation::Method

Holds the morphing method. The default is Relative.

Access functions:

QMorphingAnimation::Method method() const
void setMethod(QMorphingAnimation::Method method)

Notifier signal:

void methodChanged(QMorphingAnimation::Method method)

target : Qt3DRender::QGeometryRenderer *

Holds the target QGeometryRenderer the morphing animation is applied to.

Access functions:

Qt3DRender::QGeometryRenderer *target() const
void setTarget(Qt3DRender::QGeometryRenderer *target)

Notifier signal:

void targetChanged(Qt3DRender::QGeometryRenderer *target)

targetName : QString

Holds the name of the target geometry. This is a convenience property making it easier to match the target geometry to the morphing animation. The name is usually same as the name of the parent entity of the target QGeometryRenderer, but does not have to be.

Access functions:

QString targetName() const
void setTargetName(const QString name)

Notifier signal:

void targetNameChanged(const QString &name)

targetPositions : QVector<float>

Holds the position values of the morph target. Each position in the list specifies the position of the corresponding morph target with the same index. The values must be in an ascending order. Values can be positive or negative and do not have any predefined unit.

Access functions:

QVector<float> targetPositions() const
void setTargetPositions(const QVector<float> &targetPositions)

Notifier signal:

void targetPositionsChanged(const QVector<float> &targetPositions)

Member Function Documentation

QMorphingAnimation::QMorphingAnimation(QObject *parent = nullptr)

Construct a new QMorphingAnimation with parent.

void QMorphingAnimation::addMorphTarget(Qt3DAnimation::QMorphTarget *target)

Add new morph target at the end of the animation.

QVector<float> QMorphingAnimation::getWeights(int positionIndex)

Return morph weights at positionIndex.

QVector<Qt3DAnimation::QMorphTarget *> QMorphingAnimation::morphTargetList()

Return morph target list.

void QMorphingAnimation::removeMorphTarget(Qt3DAnimation::QMorphTarget *target)

Remove morph target from the animation.

void QMorphingAnimation::setMorphTargets(const QVector<Qt3DAnimation::QMorphTarget *> &targets)

Set morph targets to animation. Old targets are cleared.

void QMorphingAnimation::setWeights(int positionIndex, const QVector<float> &weights)

Sets morph weights at positionIndex.

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