public static Vector3 GetHoverPoint(Vector3 lp1, Vector3 lp2, Vector3 modelP, float attachR)
{
var _area = Geometric.GetArea(lp1, lp2, modelP); //三角形面积
var _lLength = Vector3.Distance(lp1, lp2); //lp1,lp2长度
var dis = _lLength < 1e-3 ? attachR + 1 : 2 * _area / _lLength; //modelP到lp1,lp2的距离
if (dis > attachR) //太远
{
return(default(Vector3));
}
Vector3 lDir = lp1 - lp2; //直线方向
Vector3 mDir = QuaternionUtility.Euler(0, 90, 0) * lDir; //xz平面上垂直直线方向
Vector3 __S = modelP - mDir * 999;
Vector3 __E = modelP + mDir * 999; //临时的两个线点
if (!Geometric.Meet(__S, __E, lp1, lp2)) //不相交
{
return(default(Vector3));
}
//到这里还能执行的话是相交且接近, 就要计算点
Vector3 res = Geometric.GetCorssPointOfSegment(__E, __S, lp1, lp2);
return(res);
}
public static float GetHoverDis(Vector3 lp1, Vector3 lp2, Vector3 modelP)
{
var _lp1 = new Vector3(lp1.x, 0, lp1.z);
var _lp2 = new Vector3(lp2.x, 0, lp2.z);
var _modelP = new Vector3(modelP.x, 0, modelP.z);
var _area = Geometric.GetArea(_lp1, _lp2, _modelP); //三角形面积
var _lLength = Vector3.Distance(_lp1, _lp2); //lp1,lp2长度
var dis = 2 * _area / _lLength; //modelP到lp1,lp2的距离
return(dis);
}
public static Vector3 GetHoverPointOfLine(Vector3 lp1, Vector3 lp2, Vector3 modelP, float attachR)
{
var _area = Geometric.GetArea(lp1, lp2, modelP); //三角形面积
var _lLength = Vector3.Distance(lp1, lp2); //lp1,lp2长度
var dis = _lLength < 1e-3 ? attachR + 1 : 2 * _area / _lLength; //modelP到lp1,lp2的距离
if (dis > attachR) //太远
{
return(default(Vector3));
}
Vector3 lDir = lp1 - lp2; //直线方向
Vector3 mDir = QuaternionUtility.Euler(0, 90, 0) * lDir; //xz平面上垂直直线方向
Vector3 __S = modelP - mDir * 99;
Vector3 __E = modelP + mDir * 99; //临时的两个线点
//if (!Geometric.Meet(__S, __E, lp1, lp2))//不相交
//{
// return default(Vector3);
//}
//到这里还能执行的话是相交且接近, 就要计算点
Vector3 res = Geometric.GetCrossPointOfLine(__E, __S, lp1, lp2);
if ((Mathf.Abs(res.x - modelP.x) < 0.01f))
{
res.x = modelP.x;
}
if ((Mathf.Abs(res.z - modelP.z) < 0.01f))
{
res.z = modelP.z;
}
return(res);
}