Editor: GLSL minification.

editor/js/Menubar.Edit.js

@@ -53,6 +53,80 @@ Menubar.Edit = function ( editor ) {
 	} );
 	options.add( option );
 
+	// Minify shaders
+
+	var option = new UI.Panel();
+	option.setClass( 'option' );
+	option.setTextContent( 'Minify Shaders' );
+	option.onClick( function() {
+
+		var root = editor.selected || editor.scene;
+
+		var errors = [];
+		var nMaterialsChanged = 0;
+
+		var path = [];
+
+		function getPath ( object ) {
+
+			path.length = 0;
+
+			var parent = object.parent;
+			if ( parent !== undefined ) getPath( parent );
+
+			path.push( object.name || object.uuid );
+
+			return path;
+
+		}
+
+		root.traverse( function ( object ) {
+
+			var material = object.material;
+
+			if ( material instanceof THREE.ShaderMaterial ) {
+
+				try {
+
+					var shader = glslprep.minifyGlsl( [
+							material.vertexShader, material.fragmentShader ] );
+
+					material.vertexShader = shader[ 0 ];
+					material.fragmentShader = shader[ 1 ];
+
+					++nMaterialsChanged;
+
+				} catch ( e ) {
+
+					var path = getPath( object ).join( "/" );
+
+					if ( e instanceof glslprep.SyntaxError )
+
+						errors.push( path + ":" +
+								e.line + ":" + e.column + ": " + e.message );
+
+					else {
+
+						errors.push( path +
+								": Unexpected error (see console for details)." );
+
+						console.error( e.stack || e );
+
+					}
+
+				}
+
+			}
+
+		} );
+
+		window.alert( nMaterialsChanged +
+				" material(s) were changed.\n" + errors.join( "\n" ) );
+
+	} );
+	options.add( option );
+
+
 	return container;
 
 };