QAttribute

PyQt5.Qt3DRender.QAttribute

Inherits from QNode.

Description

Defines an attribute and how data should be read from a QBuffer.

There are 3 types of attributes.

• VertexAttribute: used to define data to be read on a per vertex basis

• IndexAttribute: used to define vertex indices when indexed draw calls are to be used

• DrawIndirectAttribute: used to specify the DrawIndirect buffer to be used when indirect draw calls are to be used

Note: when an attribute is of type DrawIndirectAttribute, only count, stride and offset are relevant.

When providing your own attributes, it may make sense to name your attribute using helpers such as QAttribute::defaultPositionAttributeName() as that will ensure your geometry will be compatible with picking and the various materials provided in the Qt3DExtras module.

See also

QBuffer.

Enums

AttributeType

The type of the attribute.

Member	Value	Description
DrawIndirectAttribute	TODO	TODO
IndexAttribute	TODO	TODO
VertexAttribute	TODO	TODO

---

VertexBaseType

The type of the data.

Member	Value	Description
Byte	TODO	TODO
Double	TODO	TODO
Float	TODO	TODO
HalfFloat	TODO	TODO
Int	TODO	TODO
Short	TODO	TODO
UnsignedByte	TODO	TODO
UnsignedInt	TODO	TODO
UnsignedShort	TODO	TODO

Methods

__init__(parent: QNode = None)

Constructs a new QAttribute with parent.

---

__init__(QBuffer, VertexBaseType, int, int, offset: int = 0, stride: int = 0, parent: QNode = None)

Constructs a new QAttribute from buf of type, dataSize, count, offset, and stride with parent.

---

__init__(QBuffer, str, VertexBaseType, int, int, offset: int = 0, stride: int = 0, parent: QNode = None)

Constructs a new QAttribute named name from buf of type, dataSize, count, offset, and stride with parent.

---

attributeType() → AttributeType

See also

setAttributeType().

---

buffer() → QBuffer

See also

setBuffer().

---

byteOffset() → int

See also

setByteOffset().

---

byteStride() → int

See also

setByteStride().

---

count() → int

See also

setCount().

---

@staticmethod
defaultColorAttributeName() → str

QAttribute::defaultColorAttributeName Returns the name of the default color attribute

---

@staticmethod
defaultJointIndicesAttributeName() → str

QAttribute::defaultJointIndicesAttributeName Returns the name of the default joint indices attribute

---

@staticmethod
defaultJointWeightsAttributeName() → str

QAttribute::defaultJointIndicesAttributeName Returns the name of the default joint weights attribute

---

@staticmethod
defaultNormalAttributeName() → str

QAttribute::defaultNormalAttributeName Returns the name of the default normal attribute

---

@staticmethod
defaultPositionAttributeName() → str

QAttribute::defaultPositionAttributeName Returns the name of the default position attribute

---

@staticmethod
defaultTangentAttributeName() → str

QAttribute::defaultTangentAttributeName Returns the name of the default tangent attribute

---

@staticmethod
defaultTextureCoordinate1AttributeName() → str

QAttribute::defaultTextureCoordinate1AttributeName Returns the name of the default attribute for the second layer of texture coordinates

---

@staticmethod
defaultTextureCoordinate2AttributeName() → str

QAttribute::defaultTextureCoordinate2AttributeName Returns the name of the default attribute for the third layer of texture coordinates

---

@staticmethod
defaultTextureCoordinateAttributeName() → str

QAttribute::defaultTextureCoordinateAttributeName Returns the name of the default texture coordinate attribute

---

divisor() → int

See also

setDivisor().

---

name() → str

See also

setName().

---

setAttributeType(AttributeType)

See also

attributeType().

---

setBuffer(QBuffer)

See also

buffer().

---

setByteOffset(int)

See also

byteOffset().

---

setByteStride(int)

See also

byteStride().

---

setCount(int)

See also

count().

---

setDataSize(int)

TODO

---

setDataType(VertexBaseType)

TODO

---

setDivisor(int)

See also

divisor().

---

setName(str)

See also

name().

---

setVertexBaseType(VertexBaseType)

See also

vertexBaseType().

---

setVertexSize(int)

See also

vertexSize().

---

vertexBaseType() → VertexBaseType

See also

setVertexBaseType().

---

vertexSize() → int

See also

setVertexSize().

Signals

attributeTypeChanged(AttributeType)

TODO

---

bufferChanged(QBuffer)

TODO

---

byteOffsetChanged(int)

TODO

---

byteStrideChanged(int)

TODO

---

countChanged(int)

TODO

---

dataSizeChanged(int)

TODO

---

dataTypeChanged(VertexBaseType)

TODO

---

divisorChanged(int)

TODO

---

nameChanged(str)

TODO

---

vertexBaseTypeChanged(VertexBaseType)

TODO

---

vertexSizeChanged(int)

TODO