public 两圆轨迹(圆 圆1, 圆 圆2, 线段 线段1, 线段 线段2, Point[] 四边形的点集)
{
this.圆1 = 圆1;
this.圆2 = 圆2;
this.线段1 = 线段1;
this.线段2 = 线段2;
if (四边形的点集.Length != 4)
{
throw new ArgumentException("此点集不能表示四边形");
}
this.四边形的点集 = 四边形的点集;
}
public 两圆轨迹 求两圆轨迹线(圆 另一个圆)
{
var p1 = this.圆心;
var p2 = 另一个圆.圆心;
var r1 = this.半径;
var r2 = 另一个圆.半径;
var vector = p1 - p2;
var cosθ = vector.GetCos();
var sinθ = vector.GetSin();
var ax = p1.X + r1 * cosθ;
var ay = p1.Y - r1 * sinθ;
var bx = p1.X - r1 * cosθ;
var by = p1.Y + r1 * sinθ;
var cx = p2.X - r2 * cosθ;
var cy = p2.Y + r2 * sinθ;
var dx = p2.X + r2 * cosθ;
var dy = p2.Y - r2 * sinθ;
var aPoint = new Point(ax, ay);
var bPoint = new Point(bx, by);
var cPoint = new Point(cx, cy);
var dPoint = new Point(dx, dy);
线段 线段1 = new 线段(aPoint, dPoint);
线段 线段2 = new 线段(bPoint, cPoint);
return(new 两圆轨迹(this, 另一个圆, 线段1, 线段2, 四边形的点集: new[]
{
aPoint, bPoint, cPoint, dPoint
}));
}
