fineui是帆软报表和BI产品线所使用的前端框架。
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// 向量操作
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BI.Vector = function (x, y) {
this.x = x;
this.y = y;
};
BI.Vector.prototype = {
constructor: BI.Vector,
cross: function (v) {
return (this.x * v.y - this.y * v.x);
},
length: function (v) {
return (Math.sqrt(this.x * v.x + this.y * v.y));
}
};
BI.Region = function (x, y, w, h) {
this.x = x;
this.y = y;
this.w = w;
this.h = h;
};
BI.Region.prototype = {
constructor: BI.Region,
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// 判断两个区域是否相交,若相交,则要么顶点互相包含,要么矩形边界(或对角线)相交
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isIntersects: function (obj) {
if (this.isPointInside(obj.x, obj.y) ||
this.isPointInside(obj.x + obj.w, obj.y) ||
this.isPointInside(obj.x, obj.y + obj.h) ||
this.isPointInside(obj.x + obj.w, obj.y + obj.h)) {
return true;
} else if (obj.isPointInside(this.x, this.y) ||
obj.isPointInside(this.x + this.w, this.y) ||
obj.isPointInside(this.x, this.y + this.h) ||
obj.isPointInside(this.x + this.w, this.y + this.h)) {
return true;
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} else if (obj.x != null && obj.y != null)// 判断矩形对角线相交 |v1 X v2||v1 X v3| < 0
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{
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var vector1 = new BI.Vector(this.w, this.h);// 矩形对角线向量
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var vector2 = new BI.Vector(obj.x - this.x, obj.y - this.y);
var vector3 = new BI.Vector(vector2.x + obj.w, vector2.y + obj.h);
if ((vector1.cross(vector2) * vector1.cross(vector3)) < 0) {
return true;
}
}
return false;
},
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// 判断一个点是否在这个区域内部
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isPointInside: function (x, y) {
if (this.x == null || this.y == null) {
return false;
}
if (x >= this.x && x <= this.x + this.w && y >= this.y && y <= this.y + this.h) {
return true;
}
return false;
},
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// 返回区域的重心,因为是矩形所以返回中点
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getPosition: function () {
var pos = [];
pos.push(this.x + this.w / 2);
pos.push(this.y + this.h / 2);
return pos;
}
};