Added EdgesGeometry. See #6321.

src/extras/geometries/EdgesGeometry.js

@@ -0,0 +1,94 @@
+/**
+ * @author mrdoob / http://mrdoob.com/
+ */
+
+THREE.EdgesGeometry = function ( geometry, thresholdAngle ) {
+
+	THREE.BufferGeometry.call( this );
+
+	thresholdAngle = ( thresholdAngle !== undefined ) ? thresholdAngle : 1;
+
+	var thresholdDot = Math.cos( THREE.Math.degToRad( thresholdAngle ) );
+
+	var edge = [ 0, 0 ], hash = {};
+	var sortFunction = function ( a, b ) { return a - b };
+
+	var keys = [ 'a', 'b', 'c' ];
+
+	var geometry2;
+
+	if ( geometry instanceof THREE.BufferGeometry ) {
+
+		geometry2 = new THREE.Geometry();
+		geometry2.fromBufferGeometry( geometry );
+
+	} else {
+
+		geometry2 = geometry.clone();
+
+	}
+
+	geometry2.mergeVertices();
+	geometry2.computeFaceNormals();
+
+	var vertices = geometry2.vertices;
+	var faces = geometry2.faces;
+	var numEdges = 0;
+
+	for ( var i = 0, l = faces.length; i < l; i ++ ) {
+
+		var face = faces[ i ];
+
+		for ( var j = 0; j < 3; j ++ ) {
+
+			edge[ 0 ] = face[ keys[ j ] ];
+			edge[ 1 ] = face[ keys[ ( j + 1 ) % 3 ] ];
+			edge.sort( sortFunction );
+
+			var key = edge.toString();
+
+			if ( hash[ key ] === undefined ) {
+
+				hash[ key ] = { vert1: edge[ 0 ], vert2: edge[ 1 ], face1: i, face2: undefined };
+				numEdges ++;
+
+			} else {
+
+				hash[ key ].face2 = i;
+
+			}
+
+		}
+
+	}
+
+	var coords = new Float32Array( numEdges * 2 * 3 );
+
+	var index = 0;
+
+	for ( var key in hash ) {
+
+		var h = hash[ key ];
+
+		if ( h.face2 === undefined || faces[ h.face1 ].normal.dot( faces[ h.face2 ].normal ) <= thresholdDot ) {
+
+			var vertex = vertices[ h.vert1 ];
+			coords[ index ++ ] = vertex.x;
+			coords[ index ++ ] = vertex.y;
+			coords[ index ++ ] = vertex.z;
+
+			vertex = vertices[ h.vert2 ];
+			coords[ index ++ ] = vertex.x;
+			coords[ index ++ ] = vertex.y;
+			coords[ index ++ ] = vertex.z;
+
+		}
+
+	}
+
+	this.addAttribute( 'position', new THREE.BufferAttribute( coords, 3 ) );
+
+};
+
+THREE.EdgesGeometry.prototype = Object.create( THREE.BufferGeometry.prototype );
+THREE.EdgesGeometry.prototype.constructor = THREE.EdgesGeometry;

src/extras/helpers/EdgesHelper.js

@@ -11,90 +11,8 @@
 THREE.EdgesHelper = function ( object, hex, thresholdAngle ) {
 
 	var color = ( hex !== undefined ) ? hex : 0xffffff;
-	thresholdAngle = ( thresholdAngle !== undefined ) ? thresholdAngle : 1;
 
-	var thresholdDot = Math.cos( THREE.Math.degToRad( thresholdAngle ) );
-
-	var edge = [ 0, 0 ], hash = {};
-	var sortFunction = function ( a, b ) { return a - b };
-
-	var keys = [ 'a', 'b', 'c' ];
-	var geometry = new THREE.BufferGeometry();
-
-	var geometry2;
-
-	if ( object.geometry instanceof THREE.BufferGeometry ) {
-
-		geometry2 = new THREE.Geometry();
-		geometry2.fromBufferGeometry( object.geometry );
-
-	} else {
-
-		geometry2 = object.geometry.clone();
-
-	}
-
-	geometry2.mergeVertices();
-	geometry2.computeFaceNormals();
-
-	var vertices = geometry2.vertices;
-	var faces = geometry2.faces;
-	var numEdges = 0;
-
-	for ( var i = 0, l = faces.length; i < l; i ++ ) {
-
-		var face = faces[ i ];
-
-		for ( var j = 0; j < 3; j ++ ) {
-
-			edge[ 0 ] = face[ keys[ j ] ];
-			edge[ 1 ] = face[ keys[ ( j + 1 ) % 3 ] ];
-			edge.sort( sortFunction );
-
-			var key = edge.toString();
-
-			if ( hash[ key ] === undefined ) {
-
-				hash[ key ] = { vert1: edge[ 0 ], vert2: edge[ 1 ], face1: i, face2: undefined };
-				numEdges ++;
-
-			} else {
-
-				hash[ key ].face2 = i;
-
-			}
-
-		}
-
-	}
-
-	var coords = new Float32Array( numEdges * 2 * 3 );
-
-	var index = 0;
-
-	for ( var key in hash ) {
-
-		var h = hash[ key ];
-
-		if ( h.face2 === undefined || faces[ h.face1 ].normal.dot( faces[ h.face2 ].normal ) <= thresholdDot ) {
-
-			var vertex = vertices[ h.vert1 ];
-			coords[ index ++ ] = vertex.x;
-			coords[ index ++ ] = vertex.y;
-			coords[ index ++ ] = vertex.z;
-
-			vertex = vertices[ h.vert2 ];
-			coords[ index ++ ] = vertex.x;
-			coords[ index ++ ] = vertex.y;
-			coords[ index ++ ] = vertex.z;
-
-		}
-
-	}
-
-	geometry.addAttribute( 'position', new THREE.BufferAttribute( coords, 3 ) );
-
-	THREE.Line.call( this, geometry, new THREE.LineBasicMaterial( { color: color } ), THREE.LinePieces );
+	THREE.Line.call( this, new THREE.EdgesGeometry( object.geometry, thresholdAngle ), new THREE.LineBasicMaterial( { color: color } ), THREE.LinePieces );
 
 	this.matrix = object.matrixWorld;
 	this.matrixAutoUpdate = false;

utils/build/includes/extras.json

@@ -28,6 +28,7 @@
 	"src/extras/geometries/BoxGeometry.js",
 	"src/extras/geometries/CircleGeometry.js",
 	"src/extras/geometries/CylinderGeometry.js",
+	"src/extras/geometries/EdgesGeometry.js",
 	"src/extras/geometries/ExtrudeGeometry.js",
 	"src/extras/geometries/ShapeGeometry.js",
 	"src/extras/geometries/LatheGeometry.js",