From ef85b56f2eb1170ac2763deee2d059d514c08297 Mon Sep 17 00:00:00 2001
From: 06wj <06wj@163.com>
Date: Fri, 9 Oct 2020 14:08:59 +0800
Subject: [PATCH] feat: add material.frontFace

---
 src/material/Material.js      | 10 +++++++++-
 src/renderer/WebGLRenderer.js |  1 +
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/material/Material.js b/src/material/Material.js
index 0c54fc5c..09e0d19e 100644
--- a/src/material/Material.js
+++ b/src/material/Material.js
@@ -13,7 +13,8 @@ const {
     FUNC_ADD,
     ONE,
     SRC_ALPHA,
-    ONE_MINUS_SRC_ALPHA
+    ONE_MINUS_SRC_ALPHA,
+    CCW,
 } = constants;
 
 const blankInfo = {
@@ -63,6 +64,13 @@ const Material = Class.create(/** @lends Material.prototype */ {
      */
     wireframe: false,
 
+    /**
+     * front face winding orientation
+     * @default CCW
+     * @type {GLenum}
+     */
+    frontFace: CCW,
+
     /**
      * 是否开启深度测试
      * @default true
diff --git a/src/renderer/WebGLRenderer.js b/src/renderer/WebGLRenderer.js
index 517ac3ba..e5279eb4 100644
--- a/src/renderer/WebGLRenderer.js
+++ b/src/renderer/WebGLRenderer.js
@@ -524,6 +524,7 @@ const WebGLRenderer = Class.create(/** @lends WebGLRenderer.prototype */ {
         if (material.cullFace && material.cullFaceType !== FRONT_AND_BACK) {
             state.enable(CULL_FACE);
             state.cullFace(material.cullFaceType);
+            state.frontFace(material.frontFace);
         } else {
             state.disable(CULL_FACE);
         }