From e45f41f2e925b9bc4d8d4fb1753cac4d3c615242 Mon Sep 17 00:00:00 2001
From: numzero <numzer0@yandex.ru>
Date: Mon, 23 Dec 2024 22:51:49 +0300
Subject: [PATCH] More noise options?

---
 src/bin/envmap/perlin.wgsl | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/bin/envmap/perlin.wgsl b/src/bin/envmap/perlin.wgsl
index e5fbef6..3309e86 100644
--- a/src/bin/envmap/perlin.wgsl
+++ b/src/bin/envmap/perlin.wgsl
@@ -24,12 +24,14 @@ fn on_vertex(in: Vertex) -> Varying {
 
 @fragment
 fn on_fragment(in: Varying) -> @location(0) vec4f {
+	let point = in.world;
+// 	let point = 10. * normalize(in.world - vec3f(0., 0., -10.));
 	var result = 0.0;
 	var hscale = 1.0;
 	var vscale = 1.0;
 	var seed = params.seed;
 	for (var layer = 0u; layer < params.layers; layer++) {
-		result += vscale * noise(seed, hscale * in.world);
+		result += vscale * noise(seed, hscale * point);
 		hscale *= params.scale;
 		vscale *= params.roughness;
 		seed = hash(seed);
@@ -37,6 +39,21 @@ fn on_fragment(in: Varying) -> @location(0) vec4f {
 	return vec4(0.5 + 0.25 * result);
 }
 
+// @fragment
+// fn on_fragment(in: Varying) -> @location(0) vec4f {
+// 	let point = in.world;
+// 	var result = 1.0;
+// 	var hscale = 1.0;
+// 	var seed = params.seed;
+// 	for (var layer = 0u; layer < params.layers; layer++) {
+// 		result *= pow(4.0 * abs(noise(seed, hscale * point)), 0.2);
+// 		result *= pow(clamp(1. + noise(seed, hscale * point), 0., 1.), 3.0);
+// 		hscale *= params.scale;
+// 		seed = hash(seed);
+// 	}
+// 	return vec4(result);
+// }
+
 fn noise(seed: u32, coords: vec3f) -> f32 {
 	let s = split(coords);
 	var ret = 0.0;