From 511e27f9c9ddd66d26d9eeb0282fdaa9c1790e49 Mon Sep 17 00:00:00 2001
From: hhhhkrx <155431265+hhhhkrx@users.noreply.github.com>
Date: Mon, 22 Jul 2024 22:53:43 +0800
Subject: [PATCH] Fix eye bug (#289)

* refactor: fix eye bug
---
 .../src/advanced-shader/eye/EyeForwardPass.glsl          | 5 +++--
 .../src/advanced-shader/eye/EyeFunction.glsl             | 9 ++++-----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/packages/custom-material/src/advanced-shader/eye/EyeForwardPass.glsl b/packages/custom-material/src/advanced-shader/eye/EyeForwardPass.glsl
index f84af13e..b005cb07 100644
--- a/packages/custom-material/src/advanced-shader/eye/EyeForwardPass.glsl
+++ b/packages/custom-material/src/advanced-shader/eye/EyeForwardPass.glsl
@@ -75,10 +75,12 @@ void PBRFragment(Varyings varyings) {
 
   #ifdef RENDERER_HAS_TANGENT
    mat3 tbn = mat3(surfaceData.tangent, surfaceData.bitangent, surfaceData.normal);
+  #else
+   mat3 tbn = getTBNByDerivatives(aoUV, normal, varyings.positionWS, gl_FrontFacing);
   #endif
 
   // Modify surfaceData by eye algorithm
-  surfaceData.albedoColor = calculateEyeColor(varyings.uv, tbn);
+  surfaceData.albedoColor = calculateEyeColor(varyings.uv, tbn, surfaceData);
   surfaceData.normal =calculateEyeNormal(varyings.uv, tbn, gl_FrontFacing);
   surfaceData.f0 = 0.04; 
 
@@ -108,7 +110,6 @@ void PBRFragment(Varyings varyings) {
   // Emissive
   color.rgb += surfaceData.emissiveColor;
 
-
   #if SCENE_FOG_MODE != 0
       color = fog(color, varyings.positionVS);
   #endif
diff --git a/packages/custom-material/src/advanced-shader/eye/EyeFunction.glsl b/packages/custom-material/src/advanced-shader/eye/EyeFunction.glsl
index 2fc6828d..72c1056d 100644
--- a/packages/custom-material/src/advanced-shader/eye/EyeFunction.glsl
+++ b/packages/custom-material/src/advanced-shader/eye/EyeFunction.glsl
@@ -32,12 +32,11 @@ vec2 parallaxOffset( float heighttex, float height, vec3 viewDir )
    {
      float heightTex = heighttex * height- height/2.0;
      vec3 s = viewDir;
-     s.z -= 0.42;
-     s.y -= s.y;
+     s.z += 0.42;
      return  heightTex * (s.xy / s.z);
    }
 
-vec3 calculateEyeColor(Varyings varyings, mat3 tbn)
+vec3 calculateEyeColor(Varyings varyings, mat3 tbn, SurfaceData surfaceData)
 {
   // Sclera UV
   vec2 scleraUV = (varyings.uv * material_ScleraSize)-((material_ScleraSize-1.0)/2.0);
@@ -68,7 +67,7 @@ vec3 calculateEyeColor(Varyings varyings, mat3 tbn)
   #ifdef MATERIAL_HAS_SCLERA_MASK
    vec3 irisMaskTex = (texture2D(material_ScleraMask, irisSizeUV)).rgb;
    float uvmask = 1.0 - (texture2D(material_ScleraMask, varyings.uv )).b;
-   heighttexture = 1.0 - (texture2D(material_ScleraMask, parallaxUV)).b;
+   heighttexture = (texture2D(material_ScleraMask, parallaxUV)).b;
   #else
    vec3 irisMaskTex = vec3(1.0);
    float uvmask = 1.0;
@@ -76,7 +75,7 @@ vec3 calculateEyeColor(Varyings varyings, mat3 tbn)
   #endif
 
   // Transform ViewdirWS To ViewdirTS
-  vec3 vDir = normalize(camera_Position - varyings.positionWS); 
+  vec3 vDir = surfaceData.viewDir; 
   vec3 viewDirInTBN = tbn * vDir;
 
   vec2 offset = parallaxOffset(heighttexture, material_Parallax, viewDirInTBN);