QEffect Class

class Qt3DRender::QEffect

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

This class was introduced in Qt 5.7.

Public Functions

void addParameter(Qt3DRender::QParameter *parameter)
void addTechnique(Qt3DRender::QTechnique *t)
QVector<Qt3DRender::QParameter *> parameters() const
void removeParameter(Qt3DRender::QParameter *parameter)
void removeTechnique(Qt3DRender::QTechnique *t)
QVector<Qt3DRender::QTechnique *> techniques() const

Detailed Description

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.

Note: QEffect node can not be disabled.

 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

void QEffect::addParameter(Qt3DRender::QParameter *parameter)

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

void QEffect::addTechnique(Qt3DRender::QTechnique *t)

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

QVector<Qt3DRender::QParameter *> QEffect::parameters() const

Returns the list of parameters used by the effect.

void QEffect::removeParameter(Qt3DRender::QParameter *parameter)

Removes a parameter parameter from the effect.

void QEffect::removeTechnique(Qt3DRender::QTechnique *t)

Removes a technique t from the effect.

QVector<Qt3DRender::QTechnique *> QEffect::techniques() const

Returns the list of techniques used by the effect.