for du beg Function Picture_CODE u0 int Sx scal beg e1 v0 int Sy scal

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for (u = a; u <= b; u += du)
{
v = c;
beg = Function(u, v, Picture_CODE);
u0 = ((int)(Sx * scal(beg, e1)));
v0 = ((int)(Sy * scal(beg, e2)));
temp.X = BEGINX + u0;
temp.Y = BEGINY + v0;
for (v = c + dv; v <= d; v += dv)
{
cur = Function(u, v, Picture_CODE);
u1 = ((int)(Sx * scal(cur, e1)));
v1 = ((int)(Sy * scal(cur, e2)));
e.DrawLine(new Pen(Color.Black), BEGINX + u1, BEGINY + v1, temp.X, temp.Y);
temp.X = BEGINX + u1;
temp.Y = BEGINY + v1;
}
}