QMaterial Class

(Qt3DRender::QMaterial)

Provides an abstract class that should be the base of all material component classes in a scene. More...

Header:	#include <QMaterial>
qmake:	QT += 3drender
Since:	Qt 5.5
Instantiated By:	Material
Inherits:	Qt3DCore::QComponent
Inherited By:	Qt3DExtras::QDiffuseMapMaterial, Qt3DExtras::QDiffuseSpecularMapMaterial, Qt3DExtras::QDiffuseSpecularMaterial, Qt3DExtras::QGoochMaterial, Qt3DExtras::QMetalRoughMaterial, Qt3DExtras::QMorphPhongMaterial, Qt3DExtras::QNormalDiffuseMapMaterial, Qt3DExtras::QNormalDiffuseSpecularMapMaterial, Qt3DExtras::QPerVertexColorMaterial, Qt3DExtras::QPhongAlphaMaterial, Qt3DExtras::QPhongMaterial, and Qt3DExtras::QTextureMaterial

• List of all members, including inherited members
• Obsolete members

Properties

• effect : Qt3DRender::QEffect*

• 1 property inherited from Qt3DCore::QComponent
• 3 properties inherited from Qt3DCore::QNode
• 1 property inherited from QObject

Public Functions

	QMaterial(Qt3DCore::QNode *parent = nullptr)
virtual	~QMaterial()
void	addParameter(Qt3DRender::QParameter *parameter)
Qt3DRender::QEffect *	effect() const
QVector<Qt3DRender::QParameter *>	parameters() const
void	removeParameter(Qt3DRender::QParameter *parameter)

• 2 public functions inherited from Qt3DCore::QComponent
• 13 public functions inherited from Qt3DCore::QNode
• 31 public functions inherited from QObject

Public Slots

void	setEffect(Qt3DRender::QEffect *effect)

• 1 public slot inherited from Qt3DCore::QComponent
• 3 public slots inherited from Qt3DCore::QNode
• 1 public slot inherited from QObject

Signals

void	effectChanged(Qt3DRender::QEffect *effect)

• 3 signals inherited from Qt3DCore::QComponent
• 4 signals inherited from Qt3DCore::QNode
• 2 signals inherited from QObject

Static Public Members

const QMetaObject

staticMetaObject

• 9 static public members inherited from QObject

Additional Inherited Members

• 2 protected functions inherited from Qt3DCore::QNode
• 9 protected functions inherited from QObject

Detailed Description

Provides an abstract class that should be the base of all material component classes in a scene.

QMaterial provides a way to specify the rendering of an entity. Any aspect can define its own subclass of QMaterial so that a Material can be used to describe a visual element; for example, the way sound should reflect off an element, the temperature of a surface, and so on.

In itself, a QMaterial doesn't do anything. It's only when it references a QEffect node that a QMaterial becomes useful.

In practice, it often happens that a single QEffect is being referenced by several QMaterial components. This allows to only create the effect, techniques, passes and shaders once while allowing to specify the material by adding QParameter instances.

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

QMaterial *material1 = new QMaterial();
QMaterial *material2 = new QMaterial();

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

// Set the shader on the render pass
gl3Pass->setShaderProgram(glShader);

// Add the pass to the technique
gl3Technique->addRenderPass(gl3Pass);

// Set the targeted GL version for the technique
gl3Technique->graphicsApiFilter()->setApi(QGraphicsApiFilter::OpenGL);
gl3Technique->graphicsApiFilter()->setMajorVersion(3);
gl3Technique->graphicsApiFilter()->setMinorVersion(1);
gl3Technique->graphicsApiFilter()->setProfile(QGraphicsApiFilter::CoreProfile);

// Add the technique to the effect
effect->addTechnique(gl3Technique);

// Set the effect on the materials
material1->setEffect(effect);
material2->setEffect(effect);

// Set different parameters on the materials
const QString parameterName = QStringLiteral("color");
material1->addParameter(new QParameter(parameterName, QColor::fromRgbF(0.0f, 1.0f, 0.0f, 1.0f);
material2->addParameter(new QParameter(parameterName, QColor::fromRgbF(1.0f, 1.0f, 1.0f, 1.0f);

See also QEffect, QTechnique, and QParameter.

Member Function Documentation

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

Default constructs an instance of QMaterial.

[virtual] QMaterial::~QMaterial()

Destroys the instance of QMaterial. The destructor is virtual.

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

Add a parameter to the material's parameters.

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

Returns a vector of the material's current parameters

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

Remove a parameter from the material's parameters.