private int visibility(pointcode p1, pointcode p2)
{
int i, flag = 0;
for (i = 0; i < 4; i++)
{
if ((p1.code[i] != '0') || (p2.code[i] != '0'))
{
flag = 1;
}
}
if (flag == 0)
{
return(0);
}
for (i = 0; i < 4; i++)
{
if ((p1.code[i] == p2.code[i]) && (p1.code[i] == '1'))
{
flag = 0;
}
}
if (flag == 0)
{
return(1);
}
return(2);
}
private pointcode resetendpt(pointcode p1, pointcode p2, Point max, Point min)
{
pointcode temp = new pointcode();
int x = 0, y = 0, i = 0;
float m = 0, k = 0;
if (p1.code[3] == '1')
{
x = min.X;
}
if (p1.code[2] == '1')
{
x = max.X;
}
if ((p1.code[3] == '1') || (p1.code[2] == '1'))
{
m = (float)(p2.y - p1.y) / (p2.x - p1.x);
k = (p1.y + (m * (x - p1.x)));
temp.y = Convert.ToInt32(k);
temp.x = x;
for (i = 0; i < 4; i++)
{
temp.code[i] = p1.code[i];
}
if (temp.y <= max.Y && temp.y >= min.Y)
{
return(temp);
}
}
if (p1.code[0] == '1')
{
y = min.Y;
}
if (p1.code[1] == '1')
{
y = max.Y;
}
if ((p1.code[0] == '1') || (p1.code[1] == '1'))
{
m = (float)(p2.y - p1.y) / (p2.x - p1.x);
k = (float)p1.x + (float)(y - p1.y) / m;
temp.x = Convert.ToInt32(k);
temp.y = y;
for (i = 0; i < 4; i++)
{
temp.code[i] = p1.code[i];
}
return(temp);
}
else
{
return(p1);
}
}
public points()
{
p1 = new pointcode();
p2 = new pointcode();
}
