1 files changed, 71 insertions, 0 deletions
diff --git a/o3d/samples/box2d-3d/demos/compound.js b/o3d/samples/box2d-3d/demos/compound.js
new file mode 100644
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--- /dev/null
+++ b/o3d/samples/box2d-3d/demos/compound.js
@@ -0,0 +1,71 @@
+// This file comes from Box2D-JS, Copyright (c) 2008 ANDO Yasushi.
+// The original version is available at http://box2d-js.sourceforge.net/ under the
+// zlib/libpng license (see License.txt).
+// This version has been modified to make it work with O3D.
+
+demos.compound = {};
+demos.compound.createCompoundBall = function(world, x, y) {
+  var ballSd1 = new b2CircleDef();
+  ballSd1.density = 1.0;
+  ballSd1.radius = 20;
+  ballSd1.restitution = 0.2;
+  ballSd1.localPosition.Set(-20, 0);
+  var ballSd2 = new b2CircleDef();
+  ballSd2.density = 1.0;
+  ballSd2.radius = 20;
+  ballSd2.restitution = 0.2;
+  ballSd2.localPosition.Set(20, 0);
+  var ballBd = new b2BodyDef();
+  ballBd.AddShape(ballSd1);
+  ballBd.AddShape(ballSd2);
+  ballBd.position.Set(x, y);
+  // NOTE: Added the following line to create a 3d object to display.
+  ballBd.userData = g.mgr.createCompoundCylinder(20, -20, 20, 20);
+  return world.CreateBody(ballBd);
+}
+
+demos.compound.createCompoundPoly = function(world, x, y) {
+  var points = [[-30, 0], [30, 0], [0, 15]];
+  var polySd1 = new b2PolyDef();
+  polySd1.vertexCount = points.length;
+  for (var i = 0; i < points.length; i++) {
+    polySd1.vertices[i].Set(points[i][0], points[i][1]);
+  }
+  polySd1.localRotation = 0.3524 * Math.PI;
+  var R1 = new b2Mat22(polySd1.localRotation);
+  polySd1.localPosition = b2Math.b2MulMV(R1, new b2Vec2(30, 0));
+  polySd1.density = 1.0;
+  var polySd2 = new b2PolyDef();
+  polySd2.vertexCount = points.length;
+  for (var i = 0; i < points.length; i++) {
+    polySd2.vertices[i].Set(points[i][0], points[i][1]);
+  }
+  polySd2.localRotation = -0.3524 * Math.PI;
+  var R2 = new b2Mat22(polySd2.localRotation);
+  polySd2.localPosition = b2Math.b2MulMV(R2, new b2Vec2(-30, 0));
+  var polyBd = new b2BodyDef();
+  polyBd.AddShape(polySd1);
+  polyBd.AddShape(polySd2);
+  polyBd.position.Set(x,y);
+  // NOTE: Added the following line to create a 3d object to display.
+  polyBd.userData = g.mgr.createCompoundWedge(points,
+                                              polySd1.localPosition,
+                                              polySd1.localRotation,
+                                              points,
+                                              polySd2.localPosition,
+                                              polySd2.localRotation);
+  return world.CreateBody(polyBd)
+}
+
+demos.compound.initWorld = function(world) {
+  var i;
+  for (i = 1; i <= 4; i++) {
+    demos.compound.createCompoundPoly(world, 150 + 3 * Math.random(), 40 * i);
+  }
+  for (i = 1; i <= 4; i++) {
+    demos.compound.createCompoundBall(world, 350 + 3 * Math.random(), 45 * i);
+  }
+}
+demos.InitWorlds.push(demos.compound.initWorld);
+
+