/// <summary>
/// 与线的关系
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public LineRelation CheckLineRelation(Line2D 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)
{
return(LineRelation.Intersect);
}
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;
// 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>
/// 判断点是否在直线上
/// </summary>
/// <param name="pt"></param>
/// <returns></returns>
public bool CheckIn(Double2 pt)
{
Double2 diff = pt - this.startPoint;
if (Double2.CheckInLine(diff, this.normalizedDir) == true && Double2.Dot(diff, this.normalizedDir) > 0)
{
return(true);
}
return(false);
}
/// <summary>
/// 判断点是否在线段上
/// </summary>
/// <param name="pt"></param>
/// <returns></returns>
public bool CheckIn(Double2 pt)
{
Double2 diff1 = pt - this.startPoint;
Double2 diff2 = pt - this.endPoint;
if (Double2.CheckInLine(diff1, diff2) == true && Double2.Dot(diff1, diff2) <= 0)
{
return(true);
}
return(false);
}
/// <summary>
/// 与直线的关系
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public LineRelation CheckLineRelation(Line2D 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
{
return(LineRelation.Intersect);
}
}
/// <summary>
/// 判断点是否在直线上
/// </summary>
/// <param name="pt"></param>
/// <returns></returns>
public bool CheckIn(Double2 pt)
{
return(Double2.CheckInLine(pt - this.startPoint, this.normalizedDir));
}
