public void HorizonAlgrorithm(Spacing ParX, Spacing ParZ, Graphics Painter, double Tetax, double Tetay, double Tetaz)
{
PrepareArray();
int LeftX = -1, LeftY = -1, RightX = -1, RightY = -1;
int PrevX = 0, PrevY = 0;
for (double z = ParZ.End; z >= ParZ.Start; z -= ParZ.Delta)
{
double Yp = f(ParX.Start, z);
Transform(ref ParX.Start, ref Yp, ref z, Tetax, Tetay, Tetaz, ref PrevX, ref PrevY);
EdgeProcessing(ref PrevX, ref PrevY, ref LeftX, ref LeftY, Painter);
int Pflag = Visible(PrevX, PrevY);
for (double x = ParX.Start; x <= ParX.End; x += ParX.Delta)
{
int CurrX = 0, CurrY = 0;
int xi = 0, yi = 0;
Yp = f(x, z);
Transform(ref x, ref Yp, ref z, Tetax, Tetay, Tetaz, ref CurrX, ref CurrY);
int Tflag = Visible(CurrX, CurrY);
if (Tflag == Pflag)
{
if (Pflag != 0)
{
horizon(PrevX, PrevY, CurrX, CurrY, Painter);
}
}
else if (Tflag == 0)
{
if (Pflag == 1)
{
GetIntersection(PrevX, PrevY, CurrX, CurrY, Top, ref xi, ref yi);
}
else
{
GetIntersection(PrevX, PrevY, CurrX, CurrY, Down, ref xi, ref yi);
}
horizon(PrevX, PrevY, xi, yi, Painter);
}
else if (Tflag == 1)
{
if (Pflag == 0)
{
GetIntersection(PrevX, PrevY, CurrX, CurrY, Top, ref xi, ref yi);
horizon(PrevX, PrevY, xi, yi, Painter);
}
else
{
GetIntersection(PrevX, PrevY, CurrX, CurrY, Top, ref xi, ref yi);
horizon(PrevX, PrevY, xi, yi, Painter);
GetIntersection(PrevX, PrevY, CurrX, CurrY, Down, ref xi, ref yi);
horizon(xi, yi, CurrX, CurrY, Painter);
}
}
else
{
if (Pflag == 0)
{
GetIntersection(PrevX, PrevY, CurrX, CurrY, Down, ref xi, ref yi);
horizon(PrevX, PrevY, xi, yi, Painter);
}
else
{
GetIntersection(PrevX, PrevY, CurrX, CurrY, Top, ref xi, ref yi);
horizon(PrevX, PrevY, xi, yi, Painter);
GetIntersection(PrevX, PrevY, CurrX, CurrY, Down, ref xi, ref yi);
horizon(xi, yi, CurrX, CurrY, Painter);
}
}
Pflag = Tflag;
PrevX = CurrX;
PrevY = CurrY;
}
EdgeProcessing(ref PrevX, ref PrevY, ref RightX, ref RightY, Painter);
}
}