/// <summary>
/// 获取交点
/// </summary>
/// <param name="line"></param>
/// <param name="intersectPoint"></param>
/// <returns></returns>
public bool GetIntersectPoint(Rays2D line, ref Double2 intersectPoint)
{
Double2 aixsVector = line.AixsVector(this.startPoint);
double distance = aixsVector.magnitude;
if (distance == 0)
{
intersectPoint = this.startPoint;
return(true);
}
else
{
double dot = Double2.Dot(aixsVector.normalized, this.normalizedDir);
if (dot < 0)
{
Double2 point = this.startPoint - distance / dot * this.normalizedDir;
Double2 diff = point - this.endPoint;
Double2 diff2 = point - line.startPoint;
if (Double2.Dot(this.normalizedDir, diff) <= 0 && Double2.Dot(diff2, line.normalizedDir) > 0)
{
intersectPoint = point;
return(true);
}
}
}
return(false);
}
/// <summary>
/// 射线与射线间的关系
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public LineRelation CheckLineRelation(Rays2D line)
{
// 共线判断
if (Double2.CheckInLine(this.normalizedDir, line.normalizedDir) == true)
{
Double2 diff = line.startPoint - this.startPoint;
// 共线判断
if (Double2.CheckInLine(this.normalizedDir, diff) == true)
{
return(LineRelation.Coincide);
}
else
{
return(LineRelation.Parallel);
}
}
else
{
// 先判断this 是否与line 所在直线相交
Double2 aixsVector = line.AixsVector(this.startPoint);
if (Double2.Dot(aixsVector, this.normalizedDir) > 0)
{
return(LineRelation.Detach);
}
// 先判断line 是否与this 所在直线相交
aixsVector = this.AixsVector(line.startPoint);
if (Double2.Dot(aixsVector, line.normalizedDir) > 0)
{
return(LineRelation.Detach);
}
return(LineRelation.Intersect);
}
}
/// <summary>
/// 直线与射线间的关系
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public override LineRelation CheckLineRelation(Rays2D line)
{
if (CheckIn(line.startPoint) == true)
{
return(LineRelation.Intersect);
}
double dis = line.AixsVector(this.circleCenter).sqrMagnitude - this.radius * this.radius;
if (dis < 0)
{
Double2 diff = this.circleCenter - line.startPoint;
if (Double2.Dot(diff, line.normalizedDir) > 0)
{
return(LineRelation.Intersect);
}
else
{
return(LineRelation.Detach);
}
}
else
{
return(LineRelation.Detach);
}
}
/// <summary>
/// 射线与射线间的关系
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public LineRelation CheckLineRelation(Rays2D line)
{
// 共线判断
if (Double2.CheckInLine(this.normalizedDir, line.normalizedDir) == true)
{
Double2 diff = line.startPoint - this.startPoint;
// 贡献判断
if (Double2.CheckInLine(this.normalizedDir, diff) == true)
{
return(LineRelation.Coincide);
}
else
{
return(LineRelation.Parallel);
}
}
else
{
Double2 aixsVector1 = line.AixsVector(this.startPoint);
Double2 aixsVector2 = line.AixsVector(this.endPoint);
if (Double2.Dot(aixsVector1, aixsVector2) < 0)
{
Double2 aixsVector = this.AixsVector(line.startPoint);
if (Double2.Dot(aixsVector, line.normalizedDir) > 0)
{
return(LineRelation.Detach);
}
else
{
return(LineRelation.Intersect);
}
}
else
{
return(LineRelation.Detach);
}
}
}