Corrected face normal calculation in PolyhedronGeometry

src/extras/geometries/PolyhedronGeometry.js

@@ -63,11 +63,6 @@ THREE.PolyhedronGeometry = function ( vertices, faces, radius, detail ) {
 	}
 
 
-	// Merge vertices
-
-	this.mergeVertices();
-
-
 	// Apply radius
 
 	for ( var i = 0, l = this.vertices.length; i < l; i ++ ) {
@@ -77,6 +72,17 @@ THREE.PolyhedronGeometry = function ( vertices, faces, radius, detail ) {
 	}
 
 
+	// Merge vertices
+
+	this.mergeVertices();
+
+	this.computeCentroids();
+
+	this.computeFaceNormals();
+
+	this.boundingSphere = new THREE.Sphere( new THREE.Vector3(), radius );
+
+
 	// Project vector onto sphere's surface
 
 	function prepare( vector ) {
@@ -101,7 +107,6 @@ THREE.PolyhedronGeometry = function ( vertices, faces, radius, detail ) {
 
 		var face = new THREE.Face3( v1.index, v2.index, v3.index, [ v1.clone(), v2.clone(), v3.clone() ] );
 		face.centroid.add( v1 ).add( v2 ).add( v3 ).divideScalar( 3 );
-		face.normal.copy( face.centroid ).normalize();
 		that.faces.push( face );
 
 		var azi = azimuth( face.centroid );
@@ -213,9 +218,6 @@ THREE.PolyhedronGeometry = function ( vertices, faces, radius, detail ) {
 
 	}
 
-	this.computeCentroids();
-
-	this.boundingSphere = new THREE.Sphere( new THREE.Vector3(), radius );
 
 };