CocosCreator常用API函数库(二)_多边形包含判定的函数API使用方法实例

版权声明：⎝⎝⎝MaximilianLiu⎠⎠⎠ https://blog.csdn.net/MaximilianLiu/article/details/79343528

//该函数方法:根据点的信息顺序连接构成多边形,然后进行判定该点是否在多边形内

getAnchorLocation: function (number) {

//Intersection.pointInPolygon

var polyWorPos = this.node.getChildByName( "up").convertToWorldSpaceAR(cc.Vec2.ZERO);

var polyHeight = this.node.getChildByName( "up").height;

var polyWidth = this.node.getChildByName( "up").width;

var pos;

pos = this.player.calulateNextPoint(); //nextBlock有关系的

//顺序连接点,然后构成多边形

var polygon = [cc.v2(polyWorPos.x - polyWidth / 2, polyWorPos.y),

cc.v2(polyWorPos.x, polyWorPos.y + polyHeight / 2),

cc.v2(polyWorPos.x + polyWidth / 2, polyWorPos.y),

cc.v2(polyWorPos.x, polyWorPos.y - polyHeight / 2)

];

//判断是否该点是否在多边形中

if (cc.Intersection.pointInPolygon(pos, polygon)) {

return pos;

} else {

return null;

}

},