From 1bf702cd991682cc554f405fb2b451af735bae85 Mon Sep 17 00:00:00 2001
From: Andy Killorin <37423245+Speedy6451@users.noreply.github.com>
Date: Sat, 26 Aug 2023 20:18:32 -0500
Subject: [PATCH] decent-looking noise

---
 front/index.js     |  4 ++--
 pirates/src/lib.rs | 25 +++++++++++++++----------
 2 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/front/index.js b/front/index.js
index 1637704..78bc873 100644
--- a/front/index.js
+++ b/front/index.js
@@ -1,8 +1,8 @@
 var ctx;
 var image;
 var memory;
-const width = 80;
-const height = 60;
+const width = 160;
+const height = 144;
 
 function blit_frame() {
     ctx.putImageData(image, 0, 0);
diff --git a/pirates/src/lib.rs b/pirates/src/lib.rs
index a17b5f5..b3338c1 100644
--- a/pirates/src/lib.rs
+++ b/pirates/src/lib.rs
@@ -25,8 +25,8 @@ fn draw_text(text: &str, x: i32, y: i32, size: u8) {
     }
 }
 
-const WIDTH: usize = 80;
-const HEIGHT: usize = 60;
+const WIDTH: usize = 160;
+const HEIGHT: usize = 144;
 
 #[no_mangle]
 static mut BUFFER: [u32; WIDTH * HEIGHT] = [0; WIDTH * HEIGHT];
@@ -55,13 +55,18 @@ fn render_frame(buffer: &mut [u32; WIDTH*HEIGHT]) {
 
     for y in 0..HEIGHT {
         for x in 0..WIDTH {
-            let point = Vector2::new((x+frame as usize) as f32,y as f32)*100.0;
-            let mut n = noise::noise(point / 600.0, rand) * 2.0;
-            n += noise::noise(point / 300.0, rand) * 1.0;
-            n += noise::noise(point / 150.0, rand) * 0.5;
-            n += noise::noise(point / 75.0, rand) * 0.25;
-            n += noise::noise(point / 37.5, rand) * 0.125;
-            buffer[y*WIDTH + x] = (((n*0.5+0.5)*256.0) as u32) << 16| 0xFF005000;
+            let point = Vector2::new((x+frame as usize) as f32,y as f32)* 2.0;
+            let mut n = 0.0;
+            n += noise::noise(point / 64.0, rand) / 1.0;
+            n += noise::noise(point / 32.0, rand) / 2.0;
+            n += noise::noise(point / 16.0, rand) / 4.0;
+            n += noise::noise(point / 8.0, rand) / 8.0;
+            //buffer[y*WIDTH + x] = (((n*0.5+0.5)*256.0) as u32) << 16| 0xFF005000;
+            buffer[y*WIDTH + x] = if n > 0.02 {
+                0xFF00FF00
+            } else {
+                0xFFFF0000
+            }
         }
     }
     unsafe { blit_frame(); }
@@ -122,7 +127,7 @@ mod noise {
         let y = p.y as usize % width;
 
         let one = b[x*width + y] as f32;
-        let two = b[x*width + y + 256] as f32;
+        let two = b[(x*width + y + 1)%512] as f32;
 
         Vector2::new(one, two).normalize()
     }