1 files changed, 48 insertions, 0 deletions
diff --git a/fog.cginc b/fog.cginc
new file mode 100644
index 0000000..c0800bc
--- /dev/null
+++ b/fog.cginc
@@ -0,0 +1,48 @@
+#ifndef __FOG_INC
+#define __FOG_INC
+
+#include "cnlohr.cginc"
+#include "interpolators.cginc"
+#include "globals.cginc"
+
+#if defined(_RAYMARCHED_FOG)
+
+struct FogParams {
+    float steps;
+    float density;
+    texture2D dithering_noise;
+    texture3D density_noise;
+    float4 density_noise_scale;
+};
+
+struct FogResult {
+    float4 color;
+};
+
+float getRayLengthWorld()
+{
+  float2 screen_uv;
+  float perspective_factor;
+  {
+    float3 full_vec_eye_to_geometry = i.worldPos - _WorldSpaceCameraPos;
+    float3 world_dir = normalize(i.worldPos - _WorldSpaceCameraPos);
+    float perspective_divide = 1.0 / i.pos.w;
+    perspective_factor = length(full_vec_eye_to_geometry * perspective_divide);
+    screen_uv = i.screenPos.xy * perspective_divide;
+  }
+  float eye_depth_world =
+    GetLinearZFromZDepth_WorksWithMirrors(
+        SAMPLE_DEPTH_TEXTURE(_CameraDepthTexture, screen_uv),
+        screen_uv) * perspective_factor;
+}
+
+FogResult raymarched_fog(v2f i, FogParams params)
+{
+    float3 ro = _WorldSpaceCameraPos;
+    float3 rd = normalize(i.worldPos - ray_pos);
+
+
+}
+
+#endif  // _RAYMARCHED_FOG
+#endif  // __FOG_INC