QgsAspectFilter class
Calculates aspect values in a window of 3x3 cells based on first order derivatives in x- and y- directions.
Contents
- Reference
Direction is clockwise starting from north
Base classes
- class QgsDerivativeFilter
- Adds the ability to calculate derivatives in x- and y-directions.
Public functions
- auto processNineCellWindow(float* x11, float* x21, float* x31, float* x12, float* x22, float* x32, float* x13, float* x23, float* x33) -> float override
- Calculates output value from nine input values.
Function documentation
float QgsAspectFilter::
Calculates output value from nine input values.
The input values and the output value can be equal to the nodata value if not present or outside of the border. Must be implemented by subclasses