Gradient Vector from Polar to Cartesian Coordinates
grid_calculus
QgsProcessingParameterRasterLayer|DIR|Direction|None|False
QgsProcessingParameterRasterLayer|LEN|Length|None|False
QgsProcessingParameterEnum|UNITS|Polar Angle Units|[0] radians;[1] degree
QgsProcessingParameterEnum|SYSTEM|Polar Coordinate System|[0] mathematical;[1] geographical;[2] user defined
QgsProcessingParameterNumber|SYSTEM_ZERO|User defined Zero Direction|QgsProcessingParameterNumber.Double|0.0|False|None|None
QgsProcessingParameterEnum|SYSTEM_ORIENT|User defined Orientation|[0] clockwise;[1] counterclockwise
QgsProcessingParameterRasterDestination|DX|X Component
QgsProcessingParameterRasterDestination|DY|Y Component