From cec02586a53fb359dff995569b2208b1049b5dae Mon Sep 17 00:00:00 2001
From: "Mr.doob" <info@mrdoob.com>
Date: Mon, 20 Jul 2020 19:27:15 +0200
Subject: [PATCH] WebGLProgram: Removed glsl version check code.

---
 src/renderers/webgl/WebGLProgram.js | 19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)

diff --git a/src/renderers/webgl/WebGLProgram.js b/src/renderers/webgl/WebGLProgram.js
index b7232c393f..6f587a3516 100644
--- a/src/renderers/webgl/WebGLProgram.js
+++ b/src/renderers/webgl/WebGLProgram.js
@@ -670,21 +670,6 @@ function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {
 
 	if ( parameters.isWebGL2 && ! parameters.isRawShaderMaterial ) {
 
-		let isGLSL3ShaderMaterial = false;
-
-		const versionRegex = /^\s*#version\s+300\s+es\s*\n/;
-
-		if ( parameters.isShaderMaterial &&
-			vertexShader.match( versionRegex ) !== null &&
-			fragmentShader.match( versionRegex ) !== null ) {
-
-			isGLSL3ShaderMaterial = true;
-
-			vertexShader = vertexShader.replace( versionRegex, '' );
-			fragmentShader = fragmentShader.replace( versionRegex, '' );
-
-		}
-
 		// GLSL 3.0 conversion
 
 		prefixVertex = [
@@ -697,8 +682,8 @@ function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {
 		prefixFragment = [
 			'#version 300 es\n',
 			'#define varying in',
-			isGLSL3ShaderMaterial ? '' : 'out highp vec4 pc_fragColor;',
-			isGLSL3ShaderMaterial ? '' : '#define gl_FragColor pc_fragColor',
+			'out highp vec4 pc_fragColor;',
+			'#define gl_FragColor pc_fragColor',
 			'#define gl_FragDepthEXT gl_FragDepth',
 			'#define texture2D texture',
 			'#define textureCube texture',
-- 
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