private OutFlags CalcOutFlags(float x1, float y1)
{
OutFlags outFlags = OutFlags.None;
if ((double)x1 < (double)this.Left)
{
outFlags |= OutFlags.Left;
}
else if ((double)x1 > (double)this.Right)
{
outFlags |= OutFlags.Right;
}
if ((double)y1 < (double)this.Top)
{
outFlags |= OutFlags.Top;
}
else if ((double)y1 > (double)this.Bottom)
{
outFlags |= OutFlags.Bottom;
}
return(outFlags);
}
public bool ClipLine(Vector2 point1, Vector2 point2, out Vector2 new1, out Vector2 new2)
{
new1 = point1;
new2 = point2;
float num1 = point1.X;
float num2 = point1.Y;
float num3 = point2.X;
float num4 = point2.Y;
float x = this.x;
float y = this.y;
float num5 = this.x + this.height;
float num6 = this.y + this.height;
OutFlags outFlags1 = this.CalcOutFlags(num1, num2);
OutFlags outFlags2 = this.CalcOutFlags(num3, num4);
while ((outFlags1 | outFlags2) != OutFlags.None)
{
if ((outFlags1 & outFlags2) != OutFlags.None)
{
return(false);
}
float num7 = num3 - num1;
float num8 = num4 - num2;
if (outFlags1 != OutFlags.None)
{
if ((outFlags1 & OutFlags.Left) == OutFlags.Left && (double)num7 != 0.0)
{
num2 += (x - num1) * num8 / num7;
num1 = x;
}
else if ((outFlags1 & OutFlags.Right) == OutFlags.Right && (double)num7 != 0.0)
{
num2 += (num5 - num1) * num8 / num7;
num1 = num5;
}
else if ((outFlags1 & OutFlags.Bottom) == OutFlags.Bottom && (double)num8 != 0.0)
{
num1 += (num6 - num2) * num7 / num8;
num2 = num6;
}
else if ((outFlags1 & OutFlags.Top) == OutFlags.Top && (double)num8 != 0.0)
{
num1 += (y - num2) * num7 / num8;
num2 = y;
}
outFlags1 = this.CalcOutFlags(num1, num2);
}
else if (outFlags2 != OutFlags.None)
{
if ((outFlags2 & OutFlags.Left) == OutFlags.Left && (double)num7 != 0.0)
{
num4 += (x - num3) * num8 / num7;
num3 = x;
}
else if ((outFlags2 & OutFlags.Right) == OutFlags.Right && (double)num7 != 0.0)
{
num4 += (num5 - num3) * num8 / num7;
num3 = num5;
}
else if ((outFlags2 & OutFlags.Bottom) == OutFlags.Bottom && (double)num8 != 0.0)
{
num3 += (num6 - num4) * num7 / num8;
num4 = num6;
}
else if ((outFlags2 & OutFlags.Top) == OutFlags.Top && (double)num8 != 0.0)
{
num3 += (y - num4) * num7 / num8;
num4 = y;
}
outFlags2 = this.CalcOutFlags(num3, num4);
}
}
new1 = new Vector2(num1, num2);
new2 = new Vector2(num3, num4);
return(true);
}
