(原文地址:http://blog.csdn.net/while0/article/details/26008033)
使用样条曲线模拟圆形轨迹,当分割数量足够大时,逐渐逼近圆形。
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);
原文:http://blog.csdn.net/while0/article/details/26008033