QAttribute Class▲
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Header: Qt3DCore/QAttribute
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Since: Qt 5.7
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CMake:
find_package(Qt6 REQUIRED COMPONENTS 3dcore)
target_link_libraries(mytarget PRIVATE Qt6::3dcore)
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qmake: QT += 3dcore
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Inherited By:
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Instantiated By: qml-qt3d-core-attribute.xml
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Inherits: Qt3DCore::QNode
Detailed Description▲
There are 3 types of attributes.
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VertexAttribute: used to define data to be read on a per vertex basis
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IndexAttribute: used to define vertex indices when indexed draw calls are to be used
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DrawIndirectAttribute: used to specify the DrawIndirect buffer to be used when indirect draw calls are to be used
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▲
See also QBuffer
Member Type Documentation▲
enum QAttribute::AttributeType▲
The type of the attribute.
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Constant |
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|---|---|
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Qt3DCore::QAttribute::VertexAttribute |
0 |
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Qt3DCore::QAttribute::IndexAttribute |
1 |
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Qt3DCore::QAttribute::DrawIndirectAttribute |
2 |
enum QAttribute::VertexBaseType▲
The type of the data.
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Constant |
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|---|---|
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Qt3DCore::QAttribute::Byte |
0 |
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Qt3DCore::QAttribute::UnsignedByte |
1 |
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Qt3DCore::QAttribute::Short |
2 |
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Qt3DCore::QAttribute::UnsignedShort |
3 |
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Qt3DCore::QAttribute::Int |
4 |
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Qt3DCore::QAttribute::UnsignedInt |
5 |
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Qt3DCore::QAttribute::HalfFloat |
6 |
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Qt3DCore::QAttribute::Float |
7 |
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Qt3DCore::QAttribute::Double |
8 |
Property Documentation▲
attributeType : AttributeType▲
Holds the attribute type.
Access functions:
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attributeType() const
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void setAttributeType( attributeType)
Notifier signal:
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void attributeTypeChanged( attributeType)
buffer : Qt3DCore::QBuffer*▲
Holds the buffer.
Access functions:
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*buffer() const
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void setBuffer( *buffer)
Notifier signal:
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void bufferChanged( *buffer)
byteOffset : uint▲
Holds the byte offset.
Access functions:
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uint byteOffset() const
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void setByteOffset(uint byteOffset)
Notifier signal:
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void byteOffsetChanged(uint byteOffset)
byteStride : uint▲
Holds the byte stride.
Access functions:
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uint byteStride() const
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void setByteStride(uint byteStride)
Notifier signal:
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void byteStrideChanged(uint byteStride)
count : uint▲
Holds the count.
Access functions:
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uint count() const
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void setCount(uint count)
Notifier signal:
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void countChanged(uint count)
divisor : uint▲
Holds the divisor.
Access functions:
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uint divisor() const
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void setDivisor(uint divisor)
Notifier signal:
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void divisorChanged(uint divisor)
name : QString▲
Holds the name.
Access functions:
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name() const
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void setName(const &name)
Notifier signal:
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void nameChanged(const &name)
vertexBaseType : VertexBaseType▲
Holds the data type.
Access functions:
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vertexBaseType() const
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void setVertexBaseType( type)
Notifier signal:
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void vertexBaseTypeChanged( vertexBaseType)
vertexSize : uint▲
Holds the data size, it can only be 1 to 4 units (scalars and vectors), 9 units (3x3 matrices) or 16 units (4x4 matrices).
Access functions:
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uint vertexSize() const
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void setVertexSize(uint size)
Notifier signal:
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void vertexSizeChanged(uint vertexSize)
Member Function Documentation▲
[explicit] QAttribute::QAttribute(Qt3DCore::QNode *parent = nullptr)▲
Constructs a new QAttribute with parent.
[explicit] QAttribute::QAttribute(Qt3DCore::QBuffer *buf, Qt3DCore::QAttribute::VertexBaseType type, uint dataSize, uint count, uint offset = 0, uint stride = 0, Qt3DCore::QNode *parent = nullptr)▲
Constructs a new QAttribute from buf of type, dataSize, count, offset, and stride with parent.
[explicit] QAttribute::QAttribute(Qt3DCore::QBuffer *buf, const QString &name, Qt3DCore::QAttribute::VertexBaseType type, uint dataSize, uint count, uint offset = 0, uint stride = 0, Qt3DCore::QNode *parent = nullptr)▲
Constructs a new QAttribute named name from buf of type, dataSize, count, offset, and stride with parent.
void QAttribute::dataSizeChanged(uint vertexSize)▲
The signal is emitted with vertexSize when the dataSize changes.
void QAttribute::dataTypeChanged(Qt3DCore::QAttribute::VertexBaseType vertexBaseType)▲
The signal is emitted with vertexBaseType when the dataType changed.
[static] QString QAttribute::defaultColorAttributeName()▲
QAttribute::defaultColorAttributeName Returns the name of the default color attribute
Getter function for property defaultColorAttributeName.
[static] QString QAttribute::defaultJointIndicesAttributeName()▲
QAttribute::defaultJointIndicesAttributeName Returns the name of the default joint indices attribute
Getter function for property defaultJointIndicesAttributeName.
[static] QString QAttribute::defaultJointWeightsAttributeName()▲
QAttribute::defaultJointIndicesAttributeName Returns the name of the default joint weights attribute
Getter function for property defaultJointWeightsAttributeName.
[static] QString QAttribute::defaultNormalAttributeName()▲
QAttribute::defaultNormalAttributeName Returns the name of the default normal attribute
Getter function for property defaultNormalAttributeName.
[static] QString QAttribute::defaultPositionAttributeName()▲
QAttribute::defaultPositionAttributeName Returns the name of the default position attribute
Getter function for property defaultPositionAttributeName.
[static] QString QAttribute::defaultTangentAttributeName()▲
QAttribute::defaultTangentAttributeName Returns the name of the default tangent attribute
Getter function for property defaultTangentAttributeName.
[static] QString QAttribute::defaultTextureCoordinate1AttributeName()▲
QAttribute::defaultTextureCoordinate1AttributeName Returns the name of the default attribute for the second layer of texture coordinates
Getter function for property defaultTextureCoordinate1AttributeName.
[static] QString QAttribute::defaultTextureCoordinate2AttributeName()▲
QAttribute::defaultTextureCoordinate2AttributeName Returns the name of the default attribute for the third layer of texture coordinates
Getter function for property defaultTextureCoordinate2AttributeName.
[static] QString QAttribute::defaultTextureCoordinateAttributeName()▲
QAttribute::defaultTextureCoordinateAttributeName Returns the name of the default texture coordinate attribute
Getter function for property defaultTextureCoordinateAttributeName.