Qt3DRender.QMaterial¶

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

Inherited by: Qt3DExtras.QDiffuseMapMaterial, Qt3DExtras.QDiffuseSpecularMapMaterial, Qt3DExtras.QDiffuseSpecularMaterial, Qt3DExtras.QGoochMaterial, Qt3DExtras.QMetalRoughMaterial, Qt3DExtras.QMorphPhongMaterial, Qt3DExtras.QNormalDiffuseMapMaterial, Qt3DExtras.QNormalDiffuseSpecularMapMaterial, Qt3DExtras.QPerVertexColorMaterial, Qt3DExtras.QPhongAlphaMaterial, Qt3DExtras.QPhongMaterial, Qt3DExtras.QTextureMaterial

Synopsis¶

Functions¶

def addParameter (parameter)
def effect ()
def parameters ()
def removeParameter (parameter)

Slots¶

def setEffect (effect)

Signals¶

def effectChanged (effect)

Detailed Description¶

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 QParameter

class PySide2.Qt3DRender.Qt3DRender.QMaterial([parent=None])¶

Parameters: parent – QNode

PySide2.Qt3DRender.Qt3DRender.QMaterial.addParameter(parameter)¶

Parameters: parameter – QParameter

Add a parameter to the material’s parameters.

PySide2.Qt3DRender.Qt3DRender.QMaterial.effect()¶

Return type: QEffect

Qt Documentation

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