实现精灵沿着圆形轨迹运动

Point pos(100, 100); //start point
m_animSprite->setPosition(pos);

int count = 8;
float angle = 360.f/count;
float radius = 50.f;
auto array = PointArray::create(count + 1);
Point pt0(radius, 0.f), pt;
for (int i = 0; i <= count; i++)
{
pt = pt0 + Point(-radius, 0);
array->addControlPoint(pt);
pt0 = pt0.rotateByAngle(Point::ZERO, CC_DEGREES_TO_RADIANS(angle));
}
auto action = CardinalSplineBy::create(3, array, 0);
auto seq = RepeatForever::create(action);
m_animSprite->runAction(seq);