微云引擎(二)

1.PolygonShape
PolygonShape box = PolygonShape.make();
box.setAsBox(0,0); //宽一半，高一半


2.FixtureDef
FixtureDef fd = FixtureDef.make();
fd.setShape(box);
fd.setRestitution(1.0f);
fd.setFriction(0.0f);
fd.setDesity(1.0f);

m_bodies[i].createFixture(fd);


3.MWSprite
MWSprite hint = MWSprite.make(R.raw.vinew,3,text);
hint.setUnitZnterval(0.02f);
addchild(hint);
hint.tick(delta);

4.World
World mWorld;
mWorld.step(1.0f/60.0f,10,10);   //步长，速率计数，位置计数
mWorld.clearForces();
mStepCount