QEffect Class


The base class for effects in a Qt 3D scene. More...

Header: #include <QEffect>
qmake: QT += 3drender
Since: Qt 5.7
Instantiated By: Effect
Inherits: Qt3DCore::QNode

Public Functions

QEffect(Qt3DCore::QNode *parent = nullptr)
void addParameter(QParameter *parameter)
void addTechnique(QTechnique *t)
QVector<QParameter *> parameters() const
void removeParameter(QParameter *parameter)
void removeTechnique(QTechnique *t)
QVector<QTechnique *> techniques() const

Protected Functions

QEffect(QEffectPrivate &dd, Qt3DCore::QNode *parent = nullptr)

Additional Inherited Members

Detailed Description

The base class for effects in a Qt 3D scene.

The QEffect class combines a set of techniques and parameters used by those techniques to produce a rendering effect for a material.

An QEffect instance should be shared among several QMaterial instances when possible.

QEffect *effect = new QEffect();

// Create technique, render pass and shader
QTechnique *gl3Technique = new QTechnique();
QRenderPass *gl3Pass = new QRenderPass();
QShaderProgram *glShader = new QShaderProgram();

// Set the shader on the render pass

// Add the pass to the technique

// Set the targeted GL version for the technique

// Add the technique to the effect

A QParameter defined on an Effect is overridden by a QParameter (of the same name) defined in a QMaterial, QTechniqueFilter, QRenderPassFilter.

See also QMaterial, QTechnique, and QParameter.

Member Function Documentation

QEffect::QEffect(Qt3DCore::QNode *parent = nullptr)

Default constructs an instance of QEffect.

[protected] QEffect::QEffect(QEffectPrivate &dd, Qt3DCore::QNode *parent = nullptr)

Copy constructor.


Destroys the instance of QEffect.

void QEffect::addParameter(QParameter *parameter)

Adds parameter to the effect. It sends a QPropertyNodeAddedChange to the backend. The parameter will be used to set a corresponding uniform value in the shader used by this effect.

void QEffect::addTechnique(QTechnique *t)

Adds a new technique t to the effect. It sends a QPropertyNodeAddedChange to the backend.

QVector<QParameter *> QEffect::parameters() const

Returns the list of parameters used by the effect.

void QEffect::removeParameter(QParameter *parameter)

Removes a parameter parameter from the effect.

void QEffect::removeTechnique(QTechnique *t)

Removes a technique t from the effect.

QVector<QTechnique *> QEffect::techniques() const

Returns the list of techniques used by the effect.

© 2017 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.