cocos2dx三角函数与小球

//第二课

_angle = 0;

_width = 0;

//点

auto dot = DrawNode::create();

dot->drawDot(Vec2(0,0),10,Color4F(1.0,1.0,1.0,1.0));

addChild(dot);

dot->setPosition(visibleSize / 2);

schedule([dot,this,visibleSize](float f){

dot->setPositionY(visibleSize.height/2+sin(_angle)*100.0);

dot->setPositionX(_width);

_width += 1;

_angle+=0.1;

if (_angle > 360) _angle = 0;

if (_width > visibleSize.width) _width = 0;