Section: Visualization Toolkit Graphics Classes
Note that scalar values are available from the point and cell attribute data. By default, point data is used to obtain scalars, but you can control this behavior. See the AttributeMode ivar below.
By default only the first scalar value is used in the decision. Use the ComponentMode and SelectedComponent ivars to control this behavior.
To create an instance of class vtkThreshold, simply invoke its constructor as follows
obj = vtkThreshold
obj
is an instance of the vtkThreshold class.
string = obj.GetClassName ()
int = obj.IsA (string name)
vtkThreshold = obj.NewInstance ()
vtkThreshold = obj.SafeDownCast (vtkObject o)
obj.ThresholdByLower (double lower)
- Criterion is cells whose scalars are less or equal to lower threshold.
obj.ThresholdByUpper (double upper)
- Criterion is cells whose scalars are greater or equal to upper threshold.
obj.ThresholdBetween (double lower, double upper)
- Criterion is cells whose scalars are between lower and upper thresholds
(inclusive of the end values).
double = obj.GetUpperThreshold ()
- Get the Upper and Lower thresholds.
double = obj.GetLowerThreshold ()
- Get the Upper and Lower thresholds.
obj.SetAttributeMode (int )
- Control how the filter works with scalar point data and cell attribute
data. By default (AttributeModeToDefault), the filter will use point
data, and if no point data is available, then cell data is
used. Alternatively you can explicitly set the filter to use point data
(AttributeModeToUsePointData) or cell data (AttributeModeToUseCellData).
int = obj.GetAttributeMode ()
- Control how the filter works with scalar point data and cell attribute
data. By default (AttributeModeToDefault), the filter will use point
data, and if no point data is available, then cell data is
used. Alternatively you can explicitly set the filter to use point data
(AttributeModeToUsePointData) or cell data (AttributeModeToUseCellData).
obj.SetAttributeModeToDefault ()
- Control how the filter works with scalar point data and cell attribute
data. By default (AttributeModeToDefault), the filter will use point
data, and if no point data is available, then cell data is
used. Alternatively you can explicitly set the filter to use point data
(AttributeModeToUsePointData) or cell data (AttributeModeToUseCellData).
obj.SetAttributeModeToUsePointData ()
- Control how the filter works with scalar point data and cell attribute
data. By default (AttributeModeToDefault), the filter will use point
data, and if no point data is available, then cell data is
used. Alternatively you can explicitly set the filter to use point data
(AttributeModeToUsePointData) or cell data (AttributeModeToUseCellData).
obj.SetAttributeModeToUseCellData ()
- Control how the filter works with scalar point data and cell attribute
data. By default (AttributeModeToDefault), the filter will use point
data, and if no point data is available, then cell data is
used. Alternatively you can explicitly set the filter to use point data
(AttributeModeToUsePointData) or cell data (AttributeModeToUseCellData).
string = obj.GetAttributeModeAsString ()
- Control how the filter works with scalar point data and cell attribute
data. By default (AttributeModeToDefault), the filter will use point
data, and if no point data is available, then cell data is
used. Alternatively you can explicitly set the filter to use point data
(AttributeModeToUsePointData) or cell data (AttributeModeToUseCellData).
obj.SetComponentMode (int )
- Control how the decision of in / out is made with multi-component data.
The choices are to use the selected component (specified in the
SelectedComponent ivar), or to look at all components. When looking at
all components, the evaluation can pass if all the components satisfy
the rule (UseAll) or if any satisfy is (UseAny). The default value is
UseSelected.
int = obj.GetComponentModeMinValue ()
- Control how the decision of in / out is made with multi-component data.
The choices are to use the selected component (specified in the
SelectedComponent ivar), or to look at all components. When looking at
all components, the evaluation can pass if all the components satisfy
the rule (UseAll) or if any satisfy is (UseAny). The default value is
UseSelected.
int = obj.GetComponentModeMaxValue ()
- Control how the decision of in / out is made with multi-component data.
The choices are to use the selected component (specified in the
SelectedComponent ivar), or to look at all components. When looking at
all components, the evaluation can pass if all the components satisfy
the rule (UseAll) or if any satisfy is (UseAny). The default value is
UseSelected.
int = obj.GetComponentMode ()
- Control how the decision of in / out is made with multi-component data.
The choices are to use the selected component (specified in the
SelectedComponent ivar), or to look at all components. When looking at
all components, the evaluation can pass if all the components satisfy
the rule (UseAll) or if any satisfy is (UseAny). The default value is
UseSelected.
obj.SetComponentModeToUseSelected ()
- Control how the decision of in / out is made with multi-component data.
The choices are to use the selected component (specified in the
SelectedComponent ivar), or to look at all components. When looking at
all components, the evaluation can pass if all the components satisfy
the rule (UseAll) or if any satisfy is (UseAny). The default value is
UseSelected.
obj.SetComponentModeToUseAll ()
- Control how the decision of in / out is made with multi-component data.
The choices are to use the selected component (specified in the
SelectedComponent ivar), or to look at all components. When looking at
all components, the evaluation can pass if all the components satisfy
the rule (UseAll) or if any satisfy is (UseAny). The default value is
UseSelected.
obj.SetComponentModeToUseAny ()
- Control how the decision of in / out is made with multi-component data.
The choices are to use the selected component (specified in the
SelectedComponent ivar), or to look at all components. When looking at
all components, the evaluation can pass if all the components satisfy
the rule (UseAll) or if any satisfy is (UseAny). The default value is
UseSelected.
string = obj.GetComponentModeAsString ()
- Control how the decision of in / out is made with multi-component data.
The choices are to use the selected component (specified in the
SelectedComponent ivar), or to look at all components. When looking at
all components, the evaluation can pass if all the components satisfy
the rule (UseAll) or if any satisfy is (UseAny). The default value is
UseSelected.
obj.SetSelectedComponent (int )
- When the component mode is UseSelected, this ivar indicated the selected
component. The default value is 0.
int = obj.GetSelectedComponentMinValue ()
- When the component mode is UseSelected, this ivar indicated the selected
component. The default value is 0.
int = obj.GetSelectedComponentMaxValue ()
- When the component mode is UseSelected, this ivar indicated the selected
component. The default value is 0.
int = obj.GetSelectedComponent ()
- When the component mode is UseSelected, this ivar indicated the selected
component. The default value is 0.
obj.SetAllScalars (int )
- If using scalars from point data, all scalars for all points in a cell
must satisfy the threshold criterion if AllScalars is set. Otherwise,
just a single scalar value satisfying the threshold criterion enables
will extract the cell.
int = obj.GetAllScalars ()
- If using scalars from point data, all scalars for all points in a cell
must satisfy the threshold criterion if AllScalars is set. Otherwise,
just a single scalar value satisfying the threshold criterion enables
will extract the cell.
obj.AllScalarsOn ()
- If using scalars from point data, all scalars for all points in a cell
must satisfy the threshold criterion if AllScalars is set. Otherwise,
just a single scalar value satisfying the threshold criterion enables
will extract the cell.
obj.AllScalarsOff ()
- If using scalars from point data, all scalars for all points in a cell
must satisfy the threshold criterion if AllScalars is set. Otherwise,
just a single scalar value satisfying the threshold criterion enables
will extract the cell.
obj.SetPointsDataTypeToDouble ()
- Set the data type of the output points (See the data types defined in
vtkType.h). The default data type is float.
obj.SetPointsDataTypeToFloat ()
- Set the data type of the output points (See the data types defined in
vtkType.h). The default data type is float.
obj.SetPointsDataType (int )
- Set the data type of the output points (See the data types defined in
vtkType.h). The default data type is float.
int = obj.GetPointsDataType ()
- Set the data type of the output points (See the data types defined in
vtkType.h). The default data type is float.