Function mandalas::util::rgb_to_sepia

pub fn rgb_to_sepia(rgb: [f64; 3]) -> [f64; 3]

Translate an RGB colour point into a Sepia tone.

Based on https://stackoverflow.com/a/9449159/2851815.

Examples

assert_eq!(rgb_to_sepia([0.5, 0.5, 0.5]), [0.6755, 0.6015, 0.4685]);
assert_eq!(rgb_to_sepia([0f64, 0f64, 0f64]), [0f64, 0f64, 0f64]);