From 38a67a689062ec8e676434b466763c896a13e739 Mon Sep 17 00:00:00 2001
From: "max.nuding" <max.nuding@uni-konstanz.de>
Date: Thu, 7 Jul 2022 09:18:21 +0200
Subject: [PATCH] Add marbled texture

---
 src/noise.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/noise.rs b/src/noise.rs
index 8a75355..e5c3eb5 100644
--- a/src/noise.rs
+++ b/src/noise.rs
@@ -9,6 +9,9 @@ pub struct NoiseTexture {
 
 impl Texture for NoiseTexture {
     fn value(&self, _u: f64, _v: f64, point: &Point3) -> Color {
-        Color::new(1.0, 1.0, 1.0) * self.noise.default_turbulence(&(*point * self.scale))
+        let sin = self.scale * point.z() + 10.0 * self.noise.default_turbulence(point);
+        Color::new(1.0, 1.0, 1.0)
+            * 0.5
+            * (1.0 + sin.sin())
     }
 }