internal RopeJoint(IWorldPool worldPool, RopeJointDef def)
: base(worldPool, def)
{
m_localAnchorA.set(def.localAnchorA);
m_localAnchorB.set(def.localAnchorB);
m_maxLength = def.maxLength;
m_mass = 0.0f;
m_impulse = 0.0f;
m_state = LimitState.INACTIVE;
m_length = 0.0f;
}
public override void initTest(bool deserialized)
{
if (deserialized)
{
return;
}
Body ground = null;
{
BodyDef bd = new BodyDef();
ground = getWorld().createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(-40.0f, 0.0f), new Vec2(40.0f, 0.0f));
ground.createFixture(shape, 0.0f);
}
{
PolygonShape shape = new PolygonShape();
shape.setAsBox(0.5f, 0.125f);
FixtureDef fd = new FixtureDef();
fd.shape = shape;
fd.density = 20.0f;
fd.friction = 0.2f;
fd.filter.categoryBits = 0x0001;
fd.filter.maskBits = 0xFFFF & ~0x0002;
RevoluteJointDef jd = new RevoluteJointDef();
jd.collideConnected = false;
int N = 10;
float y = 15.0f;
m_ropeDef = new RopeJointDef();
m_ropeDef.localAnchorA.set(0.0f, y);
Body prevBody = ground;
for (int i = 0; i < N; ++i)
{
BodyDef bd = new BodyDef();
bd.type = BodyType.DYNAMIC;
bd.position.set(0.5f + 1.0f*i, y);
if (i == N - 1)
{
shape.setAsBox(1.5f, 1.5f);
fd.density = 100.0f;
fd.filter.categoryBits = 0x0002;
bd.position.set(1.0f*i, y);
bd.angularDamping = 0.4f;
}
Body body = getWorld().createBody(bd);
body.createFixture(fd);
Vec2 anchor = new Vec2(i, y);
jd.initialize(prevBody, body, anchor);
getWorld().createJoint(jd);
prevBody = body;
}
m_ropeDef.localAnchorB.setZero();
float extraLength = 0.01f;
m_ropeDef.maxLength = N - 1.0f + extraLength;
m_ropeDef.bodyB = prevBody;
}
{
m_ropeDef.bodyA = ground;
m_rope = getWorld().createJoint(m_ropeDef);
}
}