public int ClippingOrOperation(Form1.CSBits b1, Form1.CSBits b2)
{
int num = 0;
if (b1.Above | b2.Above)
{
checked { num += 32; }
}
if (b1.Below | b2.Below)
{
checked { num += 16; }
}
if (b1.Right | b2.Right)
{
checked { num += 8; }
}
if (b1.Left | b2.Left)
{
checked { num += 4; }
}
if (b1.Front | b2.Front)
{
checked { num += 2; }
}
if (b1.Back | b2.Back)
{
checked { ++num; }
}
return(num);
}
public bool DoClip(ref Form1.TPoint p1, ref Form1.TPoint p2)
{
bool flag1;
bool flag2 = false;
do
{
flag1 = false;
Form1.CSBits csBits = this.ClippingSecretCode(p1);
Form1.CSBits b2 = this.ClippingSecretCode(p2);
if (this.ClippingOrOperation(csBits, b2) == 0)
{
flag2 = true;
}
else if (this.ClippingAndOperation(csBits, b2) > 0)
{
flag2 = false;
}
else
{
flag1 = true;
Form1.CSBits b1;
Form1.TPoint tpoint1;
Form1.TPoint tpoint2;
if (this.ClippingAndOperation(csBits, csBits) > 0)
{
b1 = csBits;
tpoint1 = p2;
tpoint2 = p1;
}
else
{
b1 = b2;
tpoint1 = p1;
tpoint2 = p2;
}
double x;
double y;
double z;
if (b1.Above)
{
x = tpoint1.x + (tpoint2.x - tpoint1.x) * (1.0 - tpoint1.y) / (tpoint2.y - tpoint1.y);
y = 1.0;
z = tpoint1.z + (tpoint2.z - tpoint1.z) * (1.0 - tpoint1.y) / (tpoint2.y - tpoint1.y);
}
else if (b1.Below)
{
x = tpoint1.x + (tpoint2.x - tpoint1.x) * (-1.0 - tpoint1.y) / (tpoint2.y - tpoint1.y);
y = -1.0;
z = tpoint1.z + (tpoint2.z - tpoint1.z) * (-1.0 - tpoint1.y) / (tpoint2.y - tpoint1.y);
}
else if (b1.Right)
{
x = 1.0;
y = tpoint1.y + (tpoint2.y - tpoint1.y) * (1.0 - tpoint1.x) / (tpoint2.x - tpoint1.x);
z = tpoint1.z + (tpoint2.z - tpoint1.z) * (1.0 - tpoint1.x) / (tpoint2.x - tpoint1.x);
}
else if (b1.Left)
{
x = -1.0;
y = tpoint1.y + (tpoint2.y - tpoint1.y) * (-1.0 - tpoint1.x) / (tpoint2.x - tpoint1.x);
z = tpoint1.z + (tpoint2.z - tpoint1.z) * (-1.0 - tpoint1.x) / (tpoint2.x - tpoint1.x);
}
else if (b1.Front)
{
x = tpoint1.x + (tpoint2.x - tpoint1.x) * (0.0 - tpoint1.z) / (tpoint2.z - tpoint1.z);
y = tpoint1.y + (tpoint2.y - tpoint1.y) * (0.0 - tpoint1.z) / (tpoint2.z - tpoint1.z);
z = 0.0;
}
else
{
x = tpoint1.x + (tpoint2.x - tpoint1.x) * (-1.0 - tpoint1.z) / (tpoint2.z - tpoint1.z);
y = tpoint1.y + (tpoint2.y - tpoint1.y) * (-1.0 - tpoint1.z) / (tpoint2.z - tpoint1.z);
z = -1.0;
}
if (this.ClippingAndOperation(b1, csBits) == this.ClippingOrOperation(b1, csBits))
{
this.SetPoint(ref p1, x, y, z);
this.ClippingSecretCode(p1);
}
else
{
this.SetPoint(ref p2, x, y, z);
this.ClippingSecretCode(p2);
}
}
}while (flag1);
return(flag2);
}
