1 /**
  2  * @author jonobr1 / http://jonobr1.com
  3  *
  4  * Creates a one-sided polygonal geometry from a path shape. Similar to
  5  * ExtrudeGeometry.
  6  *
  7  * parameters = {
  8  *
  9  *	curveSegments: <int>, // number of points on the curves. NOT USED AT THE MOMENT.
 10  *
 11  *	material: <int> // material index for front and back faces
 12  *	uvGenerator: <Object> // object that provides UV generator functions
 13  *
 14  * }
 15  **/
 16 
 17 /**@constructor*/
 18 THREE.ShapeGeometry = function ( shapes, options ) {
 19 
 20 	THREE.Geometry.call( this );
 21 
 22 	if ( shapes instanceof Array === false ) shapes = [ shapes ];
 23 
 24 	this.shapebb = shapes[ shapes.length - 1 ].getBoundingBox();
 25 
 26 	this.addShapeList( shapes, options );
 27 
 28 	this.computeCentroids();
 29 	this.computeFaceNormals();
 30 
 31 };
 32 
 33 THREE.ShapeGeometry.prototype = Object.create( THREE.Geometry.prototype );
 34 
 35 /**
 36  * Add an array of shapes to THREE.ShapeGeometry.
 37  */
 38 THREE.ShapeGeometry.prototype.addShapeList = function ( shapes, options ) {
 39 
 40 	for ( var i = 0, l = shapes.length; i < l; i++ ) {
 41 
 42 		this.addShape( shapes[ i ], options );
 43 
 44 	}
 45 
 46 	return this;
 47 
 48 };
 49 
 50 /**
 51  * Adds a shape to THREE.ShapeGeometry, based on THREE.ExtrudeGeometry.
 52  */
 53 THREE.ShapeGeometry.prototype.addShape = function ( shape, options ) {
 54 
 55 	if ( options === undefined ) options = {};
 56 
 57 	var material = options.material;
 58 	var uvgen = options.UVGenerator === undefined ? THREE.ExtrudeGeometry.WorldUVGenerator : options.UVGenerator;
 59 
 60 	var shapebb = this.shapebb;
 61 
 62 	//
 63 
 64 	var i, l, hole, s;
 65 
 66 	var shapesOffset = this.vertices.length;
 67 	var shapePoints = shape.extractPoints();
 68 
 69 	var vertices = shapePoints.shape;
 70 	var holes = shapePoints.holes;
 71 
 72 	var reverse = !THREE.Shape.Utils.isClockWise( vertices );
 73 
 74 	if ( reverse ) {
 75 
 76 		vertices = vertices.reverse();
 77 
 78 		// Maybe we should also check if holes are in the opposite direction, just to be safe...
 79 
 80 		for ( i = 0, l = holes.length; i < l; i++ ) {
 81 
 82 			hole = holes[ i ];
 83 
 84 			if ( THREE.Shape.Utils.isClockWise( hole ) ) {
 85 
 86 				holes[ i ] = hole.reverse();
 87 
 88 			}
 89 
 90 		}
 91 
 92 		reverse = false;
 93 
 94 	}
 95 
 96 	var faces = THREE.Shape.Utils.triangulateShape( vertices, holes );
 97 
 98 	// Vertices
 99 
100 	var contour = vertices;
101 
102 	for ( i = 0, l = holes.length; i < l; i++ ) {
103 
104 		hole = holes[ i ];
105 		vertices = vertices.concat( hole );
106 
107 	}
108 
109 	//
110 
111 	var vert, vlen = vertices.length;
112 	var face, flen = faces.length;
113 	var cont, clen = contour.length;
114 
115 	for ( i = 0; i < vlen; i++ ) {
116 
117 		vert = vertices[ i ];
118 
119 		this.vertices.push( new THREE.Vector3( vert.x, vert.y, 0 ) );
120 
121 	}
122 
123 	for ( i = 0; i < flen; i++ ) {
124 
125 		face = faces[ i ];
126 
127 		var a = face[ 0 ] + shapesOffset;
128 		var b = face[ 1 ] + shapesOffset;
129 		var c = face[ 2 ] + shapesOffset;
130 
131 		this.faces.push( new THREE.Face3( a, b, c, null, null, material ) );
132 		this.faceVertexUvs[ 0 ].push( uvgen.generateBottomUV( this, shape, options, a, b, c ) );
133 
134 	}
135 
136 };
137 

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