Function pathfinder::tools::range_color

pub fn range_color(
    falloff: i16, 
    base: Rgba<u8>, 
    base_geo: Coordinate, 
    to_geo: Coordinate
) -> Rgba<u8>

Returns a Rgba with a modified value depending on how close it is to it's falloff point.

Examples

First declare the colors and the range at which it becomes darker.

extern crate image;
use pathfinder::{tools, Coordinate};
let falloff = 100;
let color = image::Rgba {
     data: [100, 100, 100, 255],
};

Evaluate that based on the modified distance, in the small sense it is modified from the defined color above.

let base = Coordinate::new(0, 0);
let to = Coordinate::new(10, 10);

assert_eq!(
    tools::range_color(falloff, color, base, to),
    image::Rgba([77, 77, 77, 255])
);