Method collisionBeginCallback

core/physics/PhysicsWorld.cpp:352–410

}

bool PhysicsWorld::collisionBeginCallback(PhysicsContact& contact)
{
    bool ret = true;

    PhysicsShape* shapeA = contact.getShapeA();
    PhysicsShape* shapeB = contact.getShapeB();
    PhysicsBody* bodyA   = shapeA->getBody();
    PhysicsBody* bodyB   = shapeB->getBody();
    auto&& jointsA       = bodyA->getJoints();

    // check the joint is collision enable or not
    for (PhysicsJoint* joint : jointsA)
    {
        if (std::find(_joints.begin(), _joints.end(), joint) == _joints.end())
        {
            continue;
        }

        if (!joint->isCollisionEnabled())
        {
            PhysicsBody* body = joint->getBodyA() == bodyA ? joint->getBodyB() : joint->getBodyA();

            if (body == bodyB)
            {
                contact.setNotificationEnable(false);
                return false;
            }
        }
    }

    // bitmask check
    if ((shapeA->getCategoryBitmask() & shapeB->getContactTestBitmask()) == 0 ||
        (shapeA->getContactTestBitmask() & shapeB->getCategoryBitmask()) == 0)
    {
        contact.setNotificationEnable(false);
    }

    if (shapeA->getGroup() != 0 && shapeA->getGroup() == shapeB->getGroup())
    {
        ret = shapeA->getGroup() > 0;
    }
    else
    {
        if ((shapeA->getCategoryBitmask() & shapeB->getCollisionBitmask()) == 0 ||
            (shapeB->getCategoryBitmask() & shapeA->getCollisionBitmask()) == 0)
        {
            ret = false;
        }
    }

    if (contact.isNotificationEnabled())
    {
        contact.setEventCode(PhysicsContact::EventCode::BEGIN);
        contact.setWorld(this);
        _eventDispatcher->dispatchEvent(&contact);
    }

    return ret ? contact.resetResult() : false;