QNode

QNode is the base class of all Qt3D node classes used to build a Qt3D scene. More…

Inherited by: QTechnique, QShaderProgramBuilder, QShaderProgram, QShaderImage, QRenderTargetOutput, QRenderState, QStencilTest, QStencilOperation, QStencilMask, QSeamlessCubemap, QScissorTest, QRasterMode, QPolygonOffset, QPointSize, QNoDepthMask, QMultiSampleAntiAliasing, QLineWidth, QFrontFace, QDithering, QDepthTest, QDepthRange, QCullFace, QColorMask, QClipPlane, QBlendEquationArguments, QBlendEquation, QAlphaTest, QAlphaCoverage, QRenderPass, QPickingSettings, QParameter, QFrameGraphNode, QWaitFence, QViewport, QTechniqueFilter, QForwardRenderer, QSubtreeEnabler, QSortPolicy, QSetFence, QRenderTargetSelector, QRenderSurfaceSelector, QRenderStateSet, QRenderPassFilter, QRenderCapture, QProximityFilter, QNoPicking, QNoDraw, QMemoryBarrier, QLayerFilter, QFrustumCulling, QDispatchCompute, QClearBuffers, QCameraSelector, QBufferCapture, QBlitFramebuffer, QFilterKey, QEffect, QAbstractTextureImage, QTextureImage, QPaintedTextureImage, QAbstractTexture, QTextureRectangle, QTextureLoader, QTextureCubeMapArray, QTextureCubeMap, QTextureBuffer, QTexture3D, QTexture2DMultisampleArray, QTexture2DMultisample, QTexture2DArray, QTexture2D, QTexture1DArray, QTexture1D, QSharedGLTexture, QAxisSetting, QAxis, QAction, QAbstractPhysicalDevice, QMouseDevice, QKeyboardDevice, QAbstractAxisInput, QButtonAxisInput, QAnalogAxisInput, QAbstractActionInput, QInputSequence, QInputChord, QActionInput, QSpriteSheetItem, QAbstractSpriteSheet, QSpriteSheet, QSpriteGrid, QJoint, QGeometryView, QTorusGeometryView, QSphereGeometryView, QPlaneGeometryView, QCylinderGeometryView, QCuboidGeometryView, QConeGeometryView, QGeometry, QTorusGeometry, QSphereGeometry, QPlaneGeometry, QExtrudedTextGeometry, QCylinderGeometry, QCuboidGeometry, QConeGeometry, QEntity, QCamera, QText2DEntity, QSkyboxEntity, QAbstractCameraController, QOrbitCameraController, QFirstPersonCameraController, QComponent, QShaderData, QSceneLoader, QRenderTarget, QRenderSettings, QObjectPicker, QMaterial, QTextureMaterial, QPhongMaterial, QPhongAlphaMaterial, QPerVertexColorMaterial, QNormalDiffuseSpecularMapMaterial, QNormalDiffuseMapMaterial, QNormalDiffuseMapAlphaMaterial, QMorphPhongMaterial, QMetalRoughMaterial, QGoochMaterial, QDiffuseSpecularMaterial, QDiffuseSpecularMapMaterial, QDiffuseMapMaterial, QLevelOfDetail, QLevelOfDetailSwitch, QLayer, QEnvironmentLight, QComputeCommand, QCameraLens, QAbstractRayCaster, QScreenRayCaster, QRayCaster, QAbstractLight, QSpotLight, QPointLight, QDirectionalLight, QFrameAction, QMouseHandler, QLogicalDevice, QKeyboardHandler, QInputSettings, QAxisAccumulator, QTransform, QCoreSettings, QBuffer, QBoundingVolume, QPickingProxy, QGeometryRenderer, QMesh, QTorusMesh, QSphereMesh, QPlaneMesh, QExtrudedTextMesh, QCylinderMesh, QCuboidMesh, QConeMesh, QAttribute, QArmature, QAbstractSkeleton, QSkeletonLoader, QSkeleton, QClock, QChannelMapper, QAbstractClipBlendNode, QLerpClipBlend, QClipBlendValue, QAdditiveClipBlend, QAbstractClipAnimator, QClipAnimator, QBlendedClipAnimator, QAbstractChannelMapping, QSkeletonMapping, QChannelMapping, QAbstractAnimationClip, QAnimationClipLoader, QAnimationClip

Synopsis

Functions

• def blockNotifications (block)

• def childNodes ()

• def id ()

• def isEnabled ()

• def notificationsBlocked ()

• def parentNode ()

Slots

• def setEnabled (isEnabled)

• def setParent (parent)

Signals

• def enabledChanged (enabled)

• def nodeDestroyed ()

• def parentChanged (parent)

Detailed Description

The owernship of QNode is determined by the QObject parent/child relationship between nodes. By itself, a QNode has no visual appearance and no particular meaning, it is there as a way of building a node based tree structure.

The parent of a QNode instance can only be another QNode instance.

Each QNode instance has a unique id that allows it to be recognizable from other instances.

When properties are defined on a QNode subclass, their NOTIFY signal will automatically generate notifications that the Qt3D backend aspects will receive.

See also

QEntity QComponent

class PySide6.Qt3DCore.Qt3DCore.QNode([parent=None])

Parameters

parent – PySide6.Qt3DCore.Qt3DCore.QNode

Creates a new QNode instance with parent parent.

Note

The backend aspects will be notified that a QNode instance is part of the scene only if it has a parent; unless this is the root node of the Qt3D scene.

See also

setParent()

PySide6.Qt3DCore.Qt3DCore.QNode.blockNotifications(block)

Parameters

block – bool

Return type

bool

If block is true, property change notifications sent by this object to aspects are blocked. If block is false, no such blocking will occur.

The return value is the previous value of notificationsBlocked() .

Note that the other notification types will be sent even if the notifications for this object have been blocked.

See also

notificationsBlocked()

PySide6.Qt3DCore.Qt3DCore.QNode.childNodes()

Return type

Returns a list filled with the QNode children of the current QNode instance.

PySide6.Qt3DCore.Qt3DCore.QNode.enabledChanged(enabled)

Parameters

enabled – bool

PySide6.Qt3DCore.Qt3DCore.QNode.id()

Return type

PySide6.Qt3DCore.Qt3DCore.QNodeId

Returns the id that uniquely identifies the QNode instance.

PySide6.Qt3DCore.Qt3DCore.QNode.isEnabled()

Return type

bool

Holds the QNode enabled flag. By default a QNode is always enabled.

Note

the interpretation of what enabled means is aspect-dependent. Even if enabled is set to false, some aspects may still consider the node in some manner. This is documented on a class by class basis.

PySide6.Qt3DCore.Qt3DCore.QNode.nodeDestroyed()

PySide6.Qt3DCore.Qt3DCore.QNode.notificationsBlocked()

Return type

bool

Returns true if aspect notifications are blocked; otherwise returns false. By default, notifications are not blocked.

See also

blockNotifications()

PySide6.Qt3DCore.Qt3DCore.QNode.parentChanged(parent)

Parameters

parent – PySide6.QtCore.QObject

PySide6.Qt3DCore.Qt3DCore.QNode.parentNode()

Return type

PySide6.Qt3DCore.Qt3DCore.QNode

Holds the immediate QNode parent, or null if the node has no parent.

Setting the parent will notify the backend aspects about current QNode instance’s parent change.

Note

if parent happens to be null, this will actually notify that the current QNode instance was removed from the scene.

PySide6.Qt3DCore.Qt3DCore.QNode.setEnabled(isEnabled)

Parameters

isEnabled – bool

Holds the QNode enabled flag. By default a QNode is always enabled.

Note

the interpretation of what enabled means is aspect-dependent. Even if enabled is set to false, some aspects may still consider the node in some manner. This is documented on a class by class basis.

PySide6.Qt3DCore.Qt3DCore.QNode.setParent(parent)

Parameters

parent – PySide6.Qt3DCore.Qt3DCore.QNode

Holds the immediate QNode parent, or null if the node has no parent.

Setting the parent will notify the backend aspects about current QNode instance’s parent change.

Note

if parent happens to be null, this will actually notify that the current QNode instance was removed from the scene.