This function causes the function f to be called on each pixel that interacts with the extent.
This function causes the function f to be called on each pixel that interacts with the extent. The definition of the word "interacts" is controlled by the options parameter.
An extent to render
A raster extent to render into
The options parameter controls whether to treat pixels as points or areas and whether to report partially-intersected areas.
Object holding extent rasterization functions.