Method update

tests/cpp-tests/Source/PhysicsTest/PhysicsTest.cpp:530–618

}

void PhysicsDemoRayCast::update(float /*delta*/)
{
    float L     = 150.0f;
    Vec2 point1 = VisibleRect::center();
    Vec2 d(L * cosf(_angle), L * sinf(_angle));
    Vec2 point2 = point1 + d;

    removeChild(_node);
    _node = DrawNode::create();
    switch (_mode)
    {
    case 0:
    {
        Vec2 point3 = point2;
        auto func   = AX_CALLBACK_3(PhysicsDemoRayCast::anyRay, this);

        _physicsWorld->rayCast(func, point1, point2, &point3);
        _node->drawSegment(point1, point3, 0.5f, STATIC_COLOR);

        if (point2 != point3)
        {
            _node->drawDot(point3, 2, Color4F(1.0f, 1.0f, 1.0f, 1.0f));
        }
        addChild(_node);

        break;
    }
    case 1:
    {
        Vec2 point3                     = point2;
        float friction                  = 1.0f;
        PhysicsRayCastCallbackFunc func = [&point3, &friction](PhysicsWorld& /*world*/, const PhysicsRayCastInfo& info,
                                                               void* /*data*/) -> bool {
            if (friction > info.fraction)
            {
                point3   = info.contact;
                friction = info.fraction;
            }

            return true;
        };

        _physicsWorld->rayCast(func, point1, point2, nullptr);
        _node->drawSegment(point1, point3, 1, STATIC_COLOR);

        if (point2 != point3)
        {
            _node->drawDot(point3, 2, Color4F(1.0f, 1.0f, 1.0f, 1.0f));
        }
        addChild(_node);

        break;
    }
    case 2:
    {
#    define MAX_MULTI_RAYCAST_NUM 5
        Vec2 points[MAX_MULTI_RAYCAST_NUM];
        int num = 0;