/// <summary>
/// 判断点point是否在矩形内
/// </summary>
public static bool IsPointInRectangle(Vector3 point, Vector3 rectA, Vector3 rectC, Vector3 rectB, Vector3 rectD)
{
Vector3 vector = rectC - rectA;
float size = -(vector.magnitude / 2f);
vector = Math3d.AddVectorLength(vector, size);
Vector3 linePoint = rectA + vector;
Vector3 vector2 = rectB - rectA;
float num = vector2.magnitude / 2f;
Vector3 vector3 = rectD - rectA;
float num2 = vector3.magnitude / 2f;
Vector3 a = Math3d.ProjectPointOnLine(linePoint, vector2.normalized, point);
float magnitude = (a - point).magnitude;
a = Math3d.ProjectPointOnLine(linePoint, vector3.normalized, point);
float magnitude2 = (a - point).magnitude;
return(magnitude2 <= num && magnitude <= num2);
}
/// <summary>
/// 一个点在一条线段上的投影点
/// </summary>
/// <param name="linePoint1"></param>
/// <param name="linePoint2"></param>
/// <param name="point"></param>
/// <returns></returns>
public static Vector3 ProjectPointOnLineSegment(Vector3 linePoint1, Vector3 linePoint2, Vector3 point)
{
Vector3 vector = Math3d.ProjectPointOnLine(linePoint1, (linePoint2 - linePoint1).normalized, point);
int num = Math3d.PointOnWhichSideOfLineSegment(linePoint1, linePoint2, vector);
if (num == 0)
{
return(vector);
}
if (num == 1)
{
return(linePoint1);
}
if (num == 2)
{
return(linePoint2);
}
return(Vector3.zero);
}