static void Check(Plane P1, TriangleF T, ref int PtCount, xyzf A, xyzf B, ref xyzf Pt1, ref xyzf Pt2)
{
double Lam = -1;
xyz Pt = new xyz(0, 0, 0);
if (P1.Cross(new LineType(A.Toxyz(), (B.Toxyz() - A.Toxyz())), out Lam, out Pt))
{
xyz N = A.Toxyz() + (B.Toxyz() - A.Toxyz()) * Lam;
if ((Lam >= -0.000000001) && (Lam < 1.000000001))
{
if (PtCount == 0)
{
Pt1 = Pt.toXYZF();
PtCount = 1;
}
else
if (PtCount == 1)
{
if (Pt1.dist(Pt.toXYZF()) > 0.0001)
{
Pt2 = Pt.toXYZF();
PtCount++;
}
}
}
}
}
/// <summary>
/// crosses the triangle with a line. It returns true if the cross point is inside the triangle. In this case <b>Lam</b> and <b>Point</b> will be calculated.
/// You get the cross point <b>Pt</b> by L.Value(Lam).
/// </summary>
/// <param name="L">is the line</param>
/// <param name="Pt">is the cross point</param>
/// <param name="Lam">is the parameter. You get the cross point <b>Pt</b> by L.Value(Lam).</param>
/// <returns></returns>
public bool Cross(LineType L, ref xyzf Pt, ref double Lam)
{
Plane P1 = new Plane(A, B, C);
xyz P = new xyz(0, 0, 0);
Lam = -1;
if (P1.Cross(L, out Lam, out P))
{
xyz PP = L.Value(Lam);
Pt = new Drawing3d.xyzf((float)P.x, (float)P.y, (float)P.z);
if (Inside(P.toXYZF()))
{
Pt = P.toXYZF();
return(true);
}
}
return(false);
}
/// <summary>
/// overrides <see cref="Surface.GetPointAndNormal(double, double, ref xyzf, ref xyzf)"/>
/// </summary>
/// <param name="x">first parameter.</param>
/// <param name="y">second parameter.</param>
/// <param name="Point">point on the sphere.</param>
/// <param name="Normal">normal vector of the sphere.</param>
public override void GetPointAndNormal(double x, double y, ref xyzf Point, ref xyzf Normal)
{
xyz _Point = Value(x, y);
if (!SameSense)
{
Normal = ((_Point - Base.BaseO).normalized() * (-1)).toXYZF();
}
else
{
Normal = (_Point - Base.BaseO).normalized().toXYZF();
}
Point = _Point.toXYZF();
}
/// <summary>
/// is a constructor wich has four points A, B, C, D on the plane and a normalvector N00
/// </summary>
/// <param name="A">Point in the plane.</param>
/// <param name="B">Point in the plane.</param>
/// <param name="C">Point in the plane.</param>
/// <param name="D">Point in the plane.</param>
/// <param name="N00">Normalvector of the plane.</param>
public SmoothPlane(xyz A, xyz B, xyz C, xyz D, xyz N00) : this()
{
plane = true;
Base = Base.From4Points(A, B, C, D);
this.N00 = N00.normalized();
this.A00 = Base.Relativ(A).toXY();
this.A10 = Base.Relativ(B).toXY();
this.A01 = Base.Relativ(C).toXY();
this.A11 = Base.Relativ(D).toXY();
this.A = A.toXYZF();
this.B = B.toXYZF();
this.C = C.toXYZF();
this.D = D.toXYZF();
}
xyzf ITriangle.GetC()
{
return(C.toXYZF());
}
xyzf ITriangle.GetB()
{
return(B.toXYZF());
}
xyzf ITriangle.GetA()
{
return(A.toXYZF());
}