From 4b176baabfcf6012a861307e56affa015f6152ac Mon Sep 17 00:00:00 2001
From: Felix Ableitner <me@nutomic.com>
Date: Wed, 6 Oct 2021 11:30:53 +0200
Subject: [PATCH] optimize fading of trails

---
 src/main.rs | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 283197b..02b361f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -26,15 +26,11 @@ async fn main() {
     loop {
         // fade trails (doesnt really work)
         let frame_time = get_frame_time();
-        for x in 0..MAP_WIDTH {
-            for y in 0..MAP_HEIGHT {
-                let mut current_pixel = trail_map.get_pixel(x, y);
-                current_pixel.r -= 0.1 * frame_time;
-                current_pixel.g -= 0.1 * frame_time;
-                current_pixel.b -= 0.1 * frame_time;
-                trail_map.set_pixel(x, y, current_pixel);
+        trail_map.bytes.iter_mut().for_each(|b| {
+            if *b > 0 {
+                *b -= 1;
             }
-        }
+        });
         // actions
         ants.iter_mut().for_each(|ant| {
             ant.walk(frame_time, &mut trail_map);