public MyLayer() {
WYSize s = Director.getInstance().getWindowSize();
Chipmunk chipmunk = Chipmunk.make();
chipmunk.setDebugDraw(true);
chipmunk.setPosition(s.width / 2, s.height / 2);
addChild(chipmunk);
mRandom = new Random();
Shape.resetShapeIdCounter();
mSpace = chipmunk.getSpace();
mSpace.setIterations(5);
mSpace.setGravity(0, -100);
mSpace.resizeActiveHash(40f, 999);
mSpace.resizeStaticHash(30f, 2999);
Body staticBody = Body.make(Float.MAX_VALUE, Float.MAX_VALUE);
// Create vertexes for a pentagon shape.
WYPoint[] verts = new WYPoint[5];
for (int i = 0; i < NUM_VERTS; i++) {
float angle = -2 * (float) Math.PI * i / (NUM_VERTS);
verts[i] = WYPoint.make(10 * (float) cos(angle), 10 * (float) sin(angle));
}
// Vertexes for a triangle shape.
WYPoint tris[] = {WYPoint.make(-15, -15), WYPoint.make(0, 10), WYPoint.make(15, -15)};
// Create the static triangles.
for (int i = 0; i < 9; i++) {
for (int j = 0; j < 6; j++) {
float stagger = (j % 2) * 40;
WYPoint offset = WYPoint.make(i * 80 - s.width / 2 + stagger, j * 70 - s.width / 2);
Poly shape = Poly.make(staticBody, tris, offset);
shape.setRestitution(1f);
shape.setFriction(1f);
shape.setLayerMask(Chipmunk.NOT_GRABABLE_MASK);
mSpace.addStaticShape(shape);
}
}
// Add lots of pentagons
float moment = Chipmunk.calculateMomentForPoly(1f, verts, WYPoint.makeZero());
for (int i = 0; i < 50; i++) {
Body body = Body.make(1f, moment);
float x = frand() * s.width - s.width / 2;
body.setPosition(x, s.height / 2 * 5 / 7);
mSpace.addBody(body);
Poly shape = Poly.make(body, verts, WYPoint.makeZero());
shape.setFriction(0.4f);
mSpace.addShape(shape);
}
schedule(new TargetSelector(this, "update(float)", new Object[] {0f}));
}
public void update(float delta) {
mSpace.step(delta);
mSpace.visitBody(this, null);
}