From b2051767ffbee16fcb1686e4d1e4a8f18bc8dc86 Mon Sep 17 00:00:00 2001
From: Joshua Barretto <joshua.s.barretto@gmail.com>
Date: Wed, 31 May 2023 17:07:22 +0100
Subject: [PATCH] More experimental shaders

---
 assets/voxygen/shaders/clouds-frag.glsl      | 4 ++++
 assets/voxygen/shaders/include/random.glsl   | 7 +++++++
 assets/voxygen/shaders/postprocess-frag.glsl | 6 ++++++
 voxygen/src/render/mod.rs                    | 4 ++++
 4 files changed, 21 insertions(+)

diff --git a/assets/voxygen/shaders/clouds-frag.glsl b/assets/voxygen/shaders/clouds-frag.glsl
index 0fbd9ebfd8..f5e31bdfc4 100644
--- a/assets/voxygen/shaders/clouds-frag.glsl
+++ b/assets/voxygen/shaders/clouds-frag.glsl
@@ -95,6 +95,10 @@ void main() {
         tgt_color = vec4(mat_colors[mat.a % 5u], 1);
         return;
     #endif
+    #ifdef EXPERIMENTAL_VIEWDEPTH
+        tgt_color = vec4(vec3(pow(clamp(depth_at(uv) / 524288.0, 0, 1), 0.3)), 1);
+        return;
+    #endif
 
     #ifdef EXPERIMENTAL_BAREMINIMUM
         tgt_color = vec4(color.rgb, 1);
diff --git a/assets/voxygen/shaders/include/random.glsl b/assets/voxygen/shaders/include/random.glsl
index c174b10c99..26ea7926bc 100644
--- a/assets/voxygen/shaders/include/random.glsl
+++ b/assets/voxygen/shaders/include/random.glsl
@@ -27,6 +27,13 @@ float hash_two(uvec2 q) {
     return float(n) * (1.0 / float(0xffffffffU));
 }
 
+float hash_three(uvec3 q) {
+    q *= uvec3(M1, M2, M3);
+    uint n = q.x ^ q.y ^ q.z;
+    n = n * (n ^ (n >> 15));
+    return float(n) * (1.0 / float(0xffffffffU));
+}
+
 float hash_fast(uvec3 q) {
     q *= uvec3(M1, M2, M3);
 
diff --git a/assets/voxygen/shaders/postprocess-frag.glsl b/assets/voxygen/shaders/postprocess-frag.glsl
index 418324c7e4..ef8df9d2b7 100644
--- a/assets/voxygen/shaders/postprocess-frag.glsl
+++ b/assets/voxygen/shaders/postprocess-frag.glsl
@@ -314,5 +314,11 @@ void main() {
     #endif
 #endif
 
+    #ifdef EXPERIMENTAL_NEWSPAPER
+        float nz = hash_three(uvec3(uvec2(uv * screen_res.xy), tick.x * dot(fract(uv * 10) + 5, vec2(1)) * 0.3));
+        nz = (nz > 0.5) ? (pow(nz * 2 - 1, 1.5) * 0.5 + 0.5) : (pow(nz * 2, 1/1.5) * 0.5);
+        final_color.rgb = vec3(step(nz, length(final_color.rgb))) * mix(vec3(1, 0.5, 0.3), normalize(final_color.rgb), 0.05);
+    #endif
+
     tgt_color = vec4(final_color.rgb, 1);
 }
diff --git a/voxygen/src/render/mod.rs b/voxygen/src/render/mod.rs
index 2432dfcae3..ba8b699c21 100644
--- a/voxygen/src/render/mod.rs
+++ b/voxygen/src/render/mod.rs
@@ -515,6 +515,8 @@ pub enum ExperimentalShader {
     ViewNormals,
     /// Show gbuffer materials.
     ViewMaterials,
+    /// Show gbuffer depth.
+    ViewDepth,
     /// Rather than fading out screen-space reflections at view space borders,
     /// smear screen space to cover the reflection vector.
     SmearReflections,
@@ -526,4 +528,6 @@ pub enum ExperimentalShader {
     /// Prefer using physically-based values for various rendering parameters,
     /// where possible.
     Photorealistic,
+    /// A dithered newspaper effect.
+    Newspaper,
 }