Updated builds.

build/three.js

@@ -40340,7 +40340,8 @@
 
 	function GridHelper( size, divisions, color1, color2 ) {
 
-		divisions = divisions || 1;
+		size = size || 10;
+		divisions = divisions || 10;
 		color1 = new Color( color1 !== undefined ? color1 : 0x444444 );
 		color2 = new Color( color2 !== undefined ? color2 : 0x888888 );
 
@@ -40375,6 +40376,93 @@
 	GridHelper.prototype = Object.create( LineSegments.prototype );
 	GridHelper.prototype.constructor = GridHelper;
 
+	/**
+	 * @author mrdoob / http://mrdoob.com/
+	 * @author Mugen87 / http://github.com/Mugen87
+	 * @author Hectate / http://www.github.com/Hectate
+	 */
+
+	function PolarGridHelper( radius, radials, circles, divisions, color1, color2 ) {
+
+		radius = radius || 10;
+		radials = radials || 16;
+		circles = circles || 8;
+		divisions = divisions || 64;
+		color1 = new Color( color1 !== undefined ? color1 : 0x444444 );
+		color2 = new Color( color2 !== undefined ? color2 : 0x888888 );
+
+		var vertices = [];
+		var colors = [];
+
+		var x, z;
+		var v, i, j, r, color;
+
+		// create the radials
+
+		for ( i = 0; i <= radials; i ++ ) {
+
+			v = ( i / radials ) * ( Math.PI * 2 );
+
+			x = Math.sin( v ) * radius;
+			z = Math.cos( v ) * radius;
+
+			vertices.push( 0, 0, 0 );
+			vertices.push( x, 0, z );
+
+			color = ( i & 1 ) ? color1 : color2;
+
+			colors.push( color.r, color.g, color.b );
+			colors.push( color.r, color.g, color.b );
+
+		}
+
+		// create the circles
+
+		for ( i = 0; i <= circles; i ++ ) {
+
+			color = ( i & 1 ) ? color1 : color2;
+
+			r = radius - ( radius / circles * i );
+
+			for ( j = 0; j < divisions; j ++ ) {
+
+				// first vertex
+
+				v = ( j / divisions ) * ( Math.PI * 2 );
+
+				x = Math.sin( v ) * r;
+				z = Math.cos( v ) * r;
+
+				vertices.push( x, 0, z );
+				colors.push( color.r, color.g, color.b );
+
+				// second vertex
+
+				v = ( ( j + 1 ) / divisions ) * ( Math.PI * 2 );
+
+				x = Math.sin( v ) * r;
+				z = Math.cos( v ) * r;
+
+				vertices.push( x, 0, z );
+				colors.push( color.r, color.g, color.b );
+
+			}
+
+		}
+
+		var geometry = new BufferGeometry();
+		geometry.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
+		geometry.addAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
+
+		var material = new LineBasicMaterial( { vertexColors: VertexColors } );
+
+		LineSegments.call( this, geometry, material );
+
+	}
+
+	PolarGridHelper.prototype = Object.create( LineSegments.prototype );
+	PolarGridHelper.prototype.constructor = PolarGridHelper;
+
 	/**
 	 * @author mrdoob / http://mrdoob.com/
 	 * @author WestLangley / http://github.com/WestLangley
@@ -42820,6 +42908,7 @@
 	exports.RectAreaLightHelper = RectAreaLightHelper;
 	exports.HemisphereLightHelper = HemisphereLightHelper;
 	exports.GridHelper = GridHelper;
+	exports.PolarGridHelper = PolarGridHelper;
 	exports.FaceNormalsHelper = FaceNormalsHelper;
 	exports.DirectionalLightHelper = DirectionalLightHelper;
 	exports.CameraHelper = CameraHelper;