Merge pull request #21307 from mrdoob/gl_FrontFacing

mrdoob · web-flow · commit 2b097d6c7e36 · 2021-02-18T17:11:33.000Z
ShaderChunk: Replaced gl_FrontFacing multiplication with conditional.
diff --git a/src/renderers/shaders/ShaderChunk/normal_fragment_begin.glsl.js b/src/renderers/shaders/ShaderChunk/normal_fragment_begin.glsl.js
@@ -1,5 +1,5 @@
 export default /* glsl */`
-float faceDirection = float( gl_FrontFacing ) * 2.0 - 1.0;
+float faceDirection = gl_FrontFacing ? 1.0 : - 1.0;
 
 #ifdef FLAT_SHADED
 
