Method onTouchsMoved

tests/cpp-tests/Source/Camera3DTest/Camera3DTest.cpp:1089–1120

}

void CameraArcBallDemo::onTouchsMoved(const std::vector<Touch*>& touchs, Event* event)
{
    if (!touchs.empty())
    {
        if (_operate == OperateCamType::RotateCamera)  // arc ball rotate
        {
            Size visibleSize = Director::getInstance()->getVisibleSize();
            Vec2 prelocation = touchs[0]->getPreviousLocationInView();
            Vec2 location    = touchs[0]->getLocationInView();
            location.x       = 2.0f * (location.x) / (visibleSize.width) - 1.0f;
            location.y       = 2.0f * (visibleSize.height - location.y) / (visibleSize.height) - 1.0f;
            prelocation.x    = 2.0f * (prelocation.x) / (visibleSize.width) - 1.0f;
            prelocation.y    = 2.0f * (visibleSize.height - prelocation.y) / (visibleSize.height) - 1.0f;

            Vec3 axes;
            float angle;
            calculateArcBall(axes, angle, prelocation.x, prelocation.y, location.x,
                             location.y);  // calculate  rotation quaternion parameters
            Quaternion quat(axes, angle);  // get rotation quaternion
            _rotationQuat = quat * _rotationQuat;

            updateCameraTransform();  // update camera Transform
        }
        else if (_operate == OperateCamType::MoveCamera)  // camera zoom
        {
            Point newPos = touchs[0]->getPreviousLocation() - touchs[0]->getLocation();
            _distanceZ -= newPos.y * 0.1f;

            updateCameraTransform();
        }
    }
}

void CameraArcBallDemo::calculateArcBall(ax::Vec3& axis, float& angle, float p1x, float p1y, float p2x, float p2y)
{