From 0396d313791af347f31d004bbf2842fb11244fac Mon Sep 17 00:00:00 2001
From: Petri Hienonen <petri.hienonen@gmail.com>
Date: Sat, 18 Oct 2025 14:24:04 +0300
Subject: Update

---
 shaders/default.wgsl | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 shaders/default.wgsl

(limited to 'shaders')

diff --git a/shaders/default.wgsl b/shaders/default.wgsl
new file mode 100644
index 0000000..b721c82
--- /dev/null
+++ b/shaders/default.wgsl
@@ -0,0 +1,51 @@
+// shaders/default.wgsl
+struct Uniforms {
+    i_resolution: vec3<f32>,
+    i_time: f32,
+    i_mouse: vec4<f32>,
+};
+
+@group(0) @binding(0) var<uniform> uniforms: Uniforms;
+
+fn palette(t: f32) -> vec3<f32> {
+    let a = vec3<f32>(0.5, 0.5, 0.5);
+    let b = vec3<f32>(0.5, 0.5, 0.5);
+    let c = vec3<f32>(1.0, 1.0, 1.0);
+    let d = vec3<f32>(0.263, 0.416, 0.557);
+    return a + b * cos(6.28318 * (c * t + d));
+}
+
+@vertex
+fn vs_main(@builtin(vertex_index) vertex_index: u32) -> @builtin(position) vec4<f32> {
+    // Full-screen triangle
+    let pos = vec2<f32>(
+        f32(vertex_index == 0u) * 4.0 - 1.0,
+        f32(vertex_index == 1u) * 4.0 - 1.0
+    );
+    return vec4<f32>(pos, 0.0, 1.0);
+}
+
+@fragment
+fn fs_main(@builtin(position) frag_coord: vec4<f32>) -> @location(0) vec4<f32> {
+    var uv = (frag_coord.xy * 2.0 - uniforms.i_resolution.xy) / uniforms.i_resolution.y;
+    let uv0 = uv;
+    let m = (uniforms.i_mouse.xy * 2.0 - uniforms.i_resolution.xy) / uniforms.i_resolution.y;
+    var final_color = vec3<f32>(0.0);
+
+    for (var i: f32 = 0.0; i < 4.0; i = i + 1.0) {
+        uv = fract(uv * m.x) - 0.5;
+
+        var d = length(uv) * exp(-length(uv0));
+
+        let col = palette(length(uv0) + i * 0.4 + uniforms.i_time * 0.4);
+
+        d = sin(d * 8.0 + uniforms.i_time) / 8.0;
+        d = abs(d);
+
+        d = pow(0.01 / d, 1.2);
+
+        final_color += col * d;
+    }
+
+    return vec4<f32>(final_color * m.y * 5.0, 1.0);
+}
-- 
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