Polyfill for Math.sign().

Chrome 38 will come with it and Firefox already implemented it.

examples/js/Mirror.js

@@ -171,8 +171,6 @@ THREE.Mirror.prototype.renderWithMirror = function ( otherMirror ) {
 
 THREE.Mirror.prototype.updateTextureMatrix = function () {
 
-	var sign = THREE.Math.sign;
-
 	this.updateMatrixWorld();
 	this.camera.updateMatrixWorld();
 
@@ -228,8 +226,8 @@ THREE.Mirror.prototype.updateTextureMatrix = function () {
 	var q = new THREE.Vector4();
 	var projectionMatrix = this.mirrorCamera.projectionMatrix;
 
-	q.x = ( sign(this.clipPlane.x) + projectionMatrix.elements[8] ) / projectionMatrix.elements[0];
-	q.y = ( sign(this.clipPlane.y) + projectionMatrix.elements[9] ) / projectionMatrix.elements[5];
+	q.x = ( Math.sign(this.clipPlane.x) + projectionMatrix.elements[8] ) / projectionMatrix.elements[0];
+	q.y = ( Math.sign(this.clipPlane.y) + projectionMatrix.elements[9] ) / projectionMatrix.elements[5];
 	q.z = - 1.0;
 	q.w = ( 1.0 + projectionMatrix.elements[10] ) / projectionMatrix.elements[14];
 

src/Three.js

@@ -5,12 +5,25 @@
 var THREE = { REVISION: '69dev' };
 
 // browserify support
+
 if ( typeof module === 'object' ) {
 
 	module.exports = THREE;
 
 }
 
+// polyfills
+
+if ( Math.sign === undefined ) {
+
+	Math.sign = function ( x ) {
+
+		return ( x < 0 ) ? - 1 : ( x > 0 ) ? 1 : 0;
+
+	};
+	
+}
+
 // GL STATE CONSTANTS
 
 THREE.CullFaceNone = 0;

src/extras/geometries/ExtrudeGeometry.js

@@ -193,7 +193,6 @@ THREE.ExtrudeGeometry.prototype.addShape = function ( shape, options ) {
 	function getBevelVec( inPt, inPrev, inNext ) {
 
 		var EPSILON = 0.0000000001;
-		var sign = THREE.Math.sign;
 		
 		// computes for inPt the corresponding point inPt' on a new contour
 		//   shiftet by 1 unit (length of normalized vector) to the left
@@ -259,7 +258,7 @@ THREE.ExtrudeGeometry.prototype.addShape = function ( shape, options ) {
 				if ( v_prev_x < - EPSILON ) {
 					if ( v_next_x < - EPSILON ) { direction_eq = true; }
 				} else {
-					if ( sign(v_prev_y) == sign(v_next_y) ) { direction_eq = true; }
+					if ( Math.sign(v_prev_y) == Math.sign(v_next_y) ) { direction_eq = true; }
 				}
 			}
 

src/math/Math.js

@@ -122,12 +122,6 @@ THREE.Math = {
 
 	},
 
-	sign: function ( x ) {
-
-		return ( x < 0 ) ? - 1 : ( x > 0 ) ? 1 : 0;
-
-	},
-
 	degToRad: function () {
 
 		var degreeToRadiansFactor = Math.PI / 180;