Class: QgsMesh3DDataBlock

A block of 3d stacked mesh data related N faces defined on base mesh frame.

Data are implicitly shared, so the class can be quickly copied std.numeric_limits<double>.quiet_NaN() represents NODATA value

Note

The API is considered EXPERIMENTAL and can be changed without a notice

Note

In QGIS 3.34 this class was renamed from QgsMesh3dDataBlock to QgsMesh3DDataBlock. The old QgsMesh3dDataBlock name remains available in PyQGIS for compatibility.

Added in version 3.12.

class qgis.core.QgsMesh3DDataBlock

Bases: object

__init__()

Constructs an invalid block

__init__(other: QgsMesh3DDataBlock)

Parameters:

other (QgsMesh3DDataBlock)

__init__(count: int, isVector: bool)

Constructs a new block for count faces

Parameters:

• count (int)

• isVector (bool)

count(self) → int

Number of 2d faces for which the volume data is stored in the block

Return type:

int

faceToVolumeIndex(self) → List[int]

Returns the indexing between faces and volumes

Return type:

List[int]

firstVolumeIndex(self) → int

Index of the first volume stored in the buffer (absolute)

Return type:

int

isValid(self) → bool

Whether the block is valid

Return type:

bool

isVector(self) → bool

Whether we store vector values

Return type:

bool

lastVolumeIndex(self) → int

Index of the last volume stored in the buffer (absolute)

Return type:

int

setFaceToVolumeIndex(self, faceToVolumeIndex: Iterable[int])

Sets the indexing between faces and volumes

Parameters:

faceToVolumeIndex (Iterable[int])

setValid(self, valid: bool)

Sets block validity

Parameters:

valid (bool)

setValues(self, doubleBuffer: Iterable[float])

Sets the values at volume centers

For vector datasets the number of values is doubled (x1, y1, x2, y2, … )

Parameters:

doubleBuffer (Iterable[float])

setVerticalLevels(self, verticalLevels: Iterable[float])

Sets the vertical levels height

Parameters:

verticalLevels (Iterable[float])

setVerticalLevelsCount(self, verticalLevelsCount: Iterable[int])

Sets the vertical level counts

Parameters:

verticalLevelsCount (Iterable[int])

value(self, volumeIndex: int) → QgsMeshDatasetValue

Returns the value at volume centers

Parameters:

volumeIndex (int) – volume index relative to firstVolumeIndex()

Return type:

QgsMeshDatasetValue

Returns:

value (scalar or vector)

values(self) → List[float]

Returns the values at volume centers

For vector datasets the number of values is doubled (x1, y1, x2, y2, … )

Return type:

List[float]

verticalLevels(self) → List[float]

Returns the vertical levels height

Return type:

List[float]

verticalLevelsCount(self) → List[int]

Returns number of vertical level above 2d faces

Return type:

List[int]

volumesCount(self) → int

Returns number of volumes stored in the buffer

Return type:

int