Provides a data store for raw data to later be used as vertices or uniforms. 更多...
头: | #include <Qt3DRender/QBuffer> |
qmake: | QT += 3drender |
实例化: | Buffer |
继承: | Qt3DCore::QNode |
enum | AccessType { Write, Read, ReadWrite } |
enum | UsageType { StreamDraw, StreamRead, StreamCopy, StaticDraw, StaticRead, …, DynamicCopy } |
QBuffer (Qt3DCore::QNode * parent = nullptr) | |
Qt3DRender::QBuffer::AccessType | accessType () const |
QByteArray | data () const |
Qt3DRender::QBufferDataGeneratorPtr | dataGenerator () const |
bool | isSyncData () const |
void | setData (const QByteArray & bytes ) |
void | setDataGenerator (const Qt3DRender::QBufferDataGeneratorPtr & functor ) |
void | updateData (int offset , const QByteArray & bytes ) |
Qt3DRender::QBuffer::UsageType | usage () const |
void | setAccessType (Qt3DRender::QBuffer::AccessType access ) |
void | setSyncData (bool syncData ) |
void | setUsage (Qt3DRender::QBuffer::UsageType usage ) |
void | accessTypeChanged (Qt3DRender::QBuffer::AccessType access ) |
void | dataAvailable () |
void | dataChanged (const QByteArray & bytes ) |
void | syncDataChanged (bool syncData ) |
void | usageChanged (Qt3DRender::QBuffer::UsageType usage ) |
typedef | QBufferDataGeneratorPtr |
Data can either be provided directly using QBuffer::setData () or by specifying a generator with QBuffer::setDataGenerator () and providing a Qt3DRender::QBufferDataGeneratorPtr .
When using a generator the data will be loaded asynchronously in a job. The loaded data can be read back if the QBuffer::syncData flag is set to true.
常量 | 值 | 描述 |
---|---|---|
Qt3DRender::QBuffer::Write
|
0x1
|
Write access |
Qt3DRender::QBuffer::Read
|
0x2
|
Read access |
Qt3DRender::QBuffer::ReadWrite
|
Write|Read
|
Write|Read |
The type of the usage.
常量 | 值 | 描述 |
---|---|---|
Qt3DRender::QBuffer::StreamDraw
|
0x88E0
|
GL_STREAM_DRAW |
Qt3DRender::QBuffer::StreamRead
|
0x88E1
|
GL_STREAM_READ |
Qt3DRender::QBuffer::StreamCopy
|
0x88E2
|
GL_STREAM_COPY |
Qt3DRender::QBuffer::StaticDraw
|
0x88E4
|
GL_STATIC_DRAW |
Qt3DRender::QBuffer::StaticRead
|
0x88E5
|
GL_STATIC_READ |
Qt3DRender::QBuffer::StaticCopy
|
0x88E6
|
GL_STATIC_COPY |
Qt3DRender::QBuffer::DynamicDraw
|
0x88E8
|
GL_DYNAMIC_DRAW |
Qt3DRender::QBuffer::DynamicRead
|
0x88E9
|
GL_DYNAMIC_READ |
Qt3DRender::QBuffer::DynamicCopy
|
0x88EA
|
GL_DYNAMIC_COPY |
返回 AccessType of the buffer.
访问函数:
Qt3DRender::QBuffer::AccessType | accessType () const |
void | setAccessType (Qt3DRender::QBuffer::AccessType access ) |
通知程序信号:
void | accessTypeChanged (Qt3DRender::QBuffer::AccessType access ) |
另请参阅 QBuffer::AccessType .
Holds the syncData flag. When syncData is true, this will force data created by a Qt3DRender::QBufferDataGenerator to also be updated on the frontend Qt3DRender::QBuffer node. By default syncData is false.
注意: : This has no effect if the buffer's data was set directly using the data property.
访问函数:
bool | isSyncData () const |
void | setSyncData (bool syncData ) |
通知程序信号:
void | syncDataChanged (bool syncData ) |
Holds the buffer usage.
访问函数:
Qt3DRender::QBuffer::UsageType | usage () const |
void | setUsage (Qt3DRender::QBuffer::UsageType usage ) |
通知程序信号:
void | usageChanged (Qt3DRender::QBuffer::UsageType usage ) |
Constructs a new QBuffer with parent .
[signal]
void
QBuffer::
dataAvailable
()
This signal is emitted when data becomes available.
[signal]
void
QBuffer::
dataChanged
(const
QByteArray
&
bytes
)
This signal is emitted with bytes when data changes.
Returns the data.
另请参阅 setData ().
Returns the buffer functor.
另请参阅 setDataGenerator ().
设置 bytes as data.
另请参阅 data ().
Sets the buffer functor .
另请参阅 dataGenerator ().
Updates the data by replacing it with bytes at offset .
注意: 此函数可以被援引,通过元对象系统和从 QML。见 Q_INVOKABLE .