CardinalSpline样条曲线(沿着正方形路线走)

1 //     CardinalSpline  样条曲线   /// 2      3     Sprite* sprite = Sprite::create("button.png"); 4     //sprite->setPosition(Vec2(visibleSize.width * 0.2, visibleSize.height * 0.5)); 5     this->addChild(sprite); 6  7     // 专门存放点的数组 8     PointArray *arr = PointArray::create(10); 9     arr->addControlPoint(Vec2(visibleSize.width * 0.2, visibleSize.height * 0.2));10     arr->addControlPoint(Vec2(visibleSize.width * 0.2, visibleSize.height * 0.8));11     arr->addControlPoint(Vec2(visibleSize.width * 0.8, visibleSize.height * 0.8));12     arr->addControlPoint(Vec2(visibleSize.width * 0.8, visibleSize.height * 0.2));13     arr->addControlPoint(Vec2(visibleSize.width * 0.2, visibleSize.height * 0.2));14 15     // 参数(时间，点数，(1代表是直线， >1或<1 都是曲线 ))16     //ActionInterval * spline = CardinalSplineTo::create(5.0f, arr, 1);17     //ActionInterval * spline = CardinalSplineTo::create(5.0f, arr, 0.3);18     //ActionInterval * spline = CardinalSplineTo::create(5.0f, arr, 5);19 20     //ActionInterval * spline = CardinalSplineBy::create(5.0f, arr, 1);21     //ActionInterval * spline = CardinalSplineBy::create(5.0f, arr, 0.3);22     ActionInterval * spline = CardinalSplineBy::create(5.0f, arr, 5);23 24 25     sprite->runAction(spline);26 27     //     CardinalSpline  样条曲线   ///