better default labels

src/body/Body.js

@@ -22,7 +22,7 @@ var Body = {};
         var defaults = {
             id: Body.nextId(),
             type: 'body',
-            label: null,
+            label: 'Body',
             angle: 0,
             position: { x: 0, y: 0 },
             force: { x: 0, y: 0 },

src/body/Composite.js

@@ -28,7 +28,7 @@ var Composite = {};
             bodies: [], 
             constraints: [], 
             composites: [],
-            label: null
+            label: 'Composite'
         }, options);
     };
 

src/constraint/Constraint.js

@@ -54,7 +54,7 @@ var Constraint = {};
 
         // option defaults
         constraint.id = constraint.id || Constraint.nextId();
-        constraint.label = constraint.label;
+        constraint.label = constraint.label || 'Constraint';
         constraint.type = 'constraint';
         constraint.stiffness = constraint.stiffness || 1;
         constraint.angularStiffness = constraint.angularStiffness || 0;

src/factory/Bodies.js

@@ -25,6 +25,7 @@ var Bodies = {};
         options = options || {};
 
         var rectangle = { 
+            label: 'Rectangle Body',
             position: { x: x, y: y },
             render: {
                 path: 'L 0 0 L ' + width + ' 0 L ' + width + ' ' + height + ' L 0 ' + height
@@ -56,6 +57,7 @@ var Bodies = {};
             x3 = x2 + x1;
 
         var trapezoid = { 
+            label: 'Trapezoid Body',
             position: { x: x, y: y },
             render: {
                 path: 'L 0 0 L ' + x1 + ' ' + (-height) + ' L ' + x2 + ' ' + (-height) + ' L ' + x3 + ' 0'
@@ -77,6 +79,7 @@ var Bodies = {};
      */
     Bodies.circle = function(x, y, radius, options, maxSides) {
         options = options || {};
+        options.label = 'Circle Body';
         
         // approximate circles with polygons until true circles implemented in SAT
 
@@ -122,6 +125,7 @@ var Bodies = {};
         }
 
         var polygon = { 
+            label: 'Polygon Body',
             position: { x: x, y: y },
             render: {
                 path: path

src/factory/Composites.js

@@ -22,7 +22,7 @@ var Composites = {};
      * @return {composite} A new composite containing objects created in the callback
      */
     Composites.stack = function(xx, yy, columns, rows, columnGap, rowGap, callback) {
-        var stack = Composite.create(),
+        var stack = Composite.create({ label: 'Stack' }),
             x = xx,
             y = yy,
             lastBody,
@@ -92,6 +92,8 @@ var Composites = {};
         
             Composite.addConstraint(composite, Constraint.create(constraint));
         }
+
+        composite.label += ' Chain';
         
         return composite;
     };
@@ -141,6 +143,8 @@ var Composites = {};
                 }
             }
         }
+
+        composite.label += ' Mesh';
         
         return composite;
     };
@@ -196,7 +200,7 @@ var Composites = {};
      * @return {composite} A new composite newtonsCradle body
      */
     Composites.newtonsCradle = function(xx, yy, number, size, length) {
-        var newtonsCradle = Composite.create();
+        var newtonsCradle = Composite.create({ label: 'Newtons Cradle' });
 
         for (var i = 0; i < number; i++) {
             var separation = 1.9,
@@ -228,7 +232,7 @@ var Composites = {};
             wheelBOffset = width * 0.5 - wheelBase,
             wheelYOffset = 0;
     
-        var car = Composite.create(),
+        var car = Composite.create({ label: 'Car' }),
             body = Bodies.trapezoid(xx, yy, width, height, 0.3, { groupId: groupId, friction: 0.01 });
     
         var wheelA = Bodies.circle(xx + wheelAOffset, yy + wheelYOffset, wheelSize, { 
@@ -293,6 +297,8 @@ var Composites = {};
 
         Composites.mesh(softBody, columns, rows, crossBrace, constraintOptions);
 
+        softBody.label = 'Soft Body';
+
         return softBody;
     };