summedareatable

Generic implementation of summed area tables with Rust

You can find more information about summed area tables on Wikipedia.

http://en.wikipedia.org/wiki/Summedareatable

Basic usage

Creating a summed area table for a 10x10 matrix filled with ones.

rust let src: DMat<usize> = DMat::new_ones(10,10); let table = src.calculate_summed_area_table();

Getting the sum of a specific area

rust assert_eq!(100, table.get_sum((0,0),(9,9))); assert_eq!(50, table.get_sum((0,0),(9,4))); assert_eq!(25, table.get_sum((0,0),(4,4)));

Generic usage

You can implement the SummedAreaTableSourcetrait for your own types if you want them to have the calculate_summed_area_table() method. You also need to implement the SourceValue trait for the value type of your source.

This is how the library does it for DMat<usize> type.

```rust impl SourceValue for usize { }

impl SummedAreaTableSource for DMat{ fn get_values(&self) -> &DMat { self } } ```