From f239ba86196746d8ef69ff2687b088dbf9ef564f Mon Sep 17 00:00:00 2001
From: Kevin Levron <kevin.levron@gmail.com>
Date: Thu, 17 Sep 2020 17:09:45 +0200
Subject: [PATCH] update sub surface

---
 src/materials/SubSurfaceMaterial.js         | 19 +++++++++++++++++--
 src/materials/SubsurfaceScatteringShader.js | 14 +++++++++++++-
 2 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/src/materials/SubSurfaceMaterial.js b/src/materials/SubSurfaceMaterial.js
index 467327a..e7cc9ef 100644
--- a/src/materials/SubSurfaceMaterial.js
+++ b/src/materials/SubSurfaceMaterial.js
@@ -33,6 +33,18 @@ export default {
       type: Number,
       default: 4,
     },
+    transparent: {
+      type: Boolean,
+      default: false,
+    },
+    opacity: {
+      type: Number,
+      default: 1,
+    },
+    vertexColors: {
+      type: Boolean,
+      default: false,
+    },
   },
   created() {
     const params = SubsurfaceScatteringShader;
@@ -41,14 +53,17 @@ export default {
       if (key === 'diffuse' || key === 'thicknessColor') {
         value = new Color(value);
       }
-      if (key !== 'id') uniforms[key].value = value;
+      if (key !== 'id' && key !== 'transparent' && key !== 'vertexColors') {
+        uniforms[key].value = value;
+      }
     });
 
     this.material = new TShaderMaterial({
       ...params,
       uniforms,
       lights: true,
-      transparent: true,
+      transparent: this.transparent,
+      vertexColors: this.vertexColors,
     });
   },
 };
diff --git a/src/materials/SubsurfaceScatteringShader.js b/src/materials/SubsurfaceScatteringShader.js
index 49283f0..1fe5356 100644
--- a/src/materials/SubsurfaceScatteringShader.js
+++ b/src/materials/SubsurfaceScatteringShader.js
@@ -1,3 +1,11 @@
+/**
+ * ------------------------------------------------------------------------------------------
+ * Subsurface Scattering shader
+ * Based on three/examples/jsm/shaders/SubsurfaceScatteringShader.js
+ * Based on GDC 2011 – Approximating Translucency for a Fast, Cheap and Convincing Subsurface Scattering Look
+ * https://colinbarrebrisebois.com/2011/03/07/gdc-2011-approximating-translucency-for-a-fast-cheap-and-convincing-subsurface-scattering-look/
+ *------------------------------------------------------------------------------------------
+ */
 import {
   Color,
   ShaderChunk,
@@ -45,7 +53,11 @@ const SubsurfaceScatteringShader = {
     uniform vec3 thicknessColor;
 
     void RE_Direct_Scattering(const in IncidentLight directLight, const in vec2 uv, const in GeometricContext geometry, inout ReflectedLight reflectedLight) {
-      vec3 thickness = thicknessColor;
+      #ifdef USE_COLOR
+        vec3 thickness = vColor * thicknessColor;
+      #else
+        vec3 thickness = thicknessColor;
+      #endif
       vec3 scatteringHalf = normalize(directLight.direction + (geometry.normal * thicknessDistortion));
       float scatteringDot = pow(saturate(dot(geometry.viewDir, -scatteringHalf)), thicknessPower) * thicknessScale;
       vec3 scatteringIllu = (scatteringDot + thicknessAmbient) * thickness;