public static bool PointInPolygon(ref FixVector2 pnt, FixVector2[] plg)
{
if ((plg == null) || (plg.Length < 3))
{
return(false);
}
bool flag = false;
int index = 0;
for (int i = plg.Length - 1; index < plg.Length; i = index++)
{
FixVector2 num3 = plg[index];
FixVector2 num4 = plg[i];
if (((num3.y <= pnt.y) && (pnt.y < num4.y)) || ((num4.y <= pnt.y) && (pnt.y < num3.y)))
{
int num5 = num4.y - num3.y;
long num6 = ((pnt.y - num3.y) * (num4.x - num3.x)) - ((pnt.x - num3.x) * num5);
if (num5 > 0)
{
if (num6 > 0L)
{
flag = !flag;
}
}
else if (num6 < 0L)
{
flag = !flag;
}
}
}
return(flag);
}
public static bool IntersectSegment(ref FixVector2 seg1Src, ref FixVector2 seg1Vec, ref FixVector2 seg2Src, ref FixVector2 seg2Vec, out FixVector2 interPoint)
{
long num;
long num2;
long num3;
long num4;
long num5;
long num6;
SegvecToLinegen(ref seg1Src, ref seg1Vec, out num, out num2, out num3);
SegvecToLinegen(ref seg2Src, ref seg2Vec, out num4, out num5, out num6);
long b = (num * num5) - (num4 * num2);
if (b != 0)
{
long x = Divide((long)((num2 * num6) - (num5 * num3)), b);
long y = Divide((long)((num4 * num3) - (num * num6)), b);
bool flag = IsPointOnSegment(ref seg1Src, ref seg1Vec, x, y) && IsPointOnSegment(ref seg2Src, ref seg2Vec, x, y);
interPoint.x = (int)x;
interPoint.y = (int)y;
return(flag);
}
interPoint = FixVector2.zero;
return(false);
}
private static bool IsPointOnSegment(ref FixVector2 segSrc, ref FixVector2 segVec, long x, long y)
{
long num = x - segSrc.x;
long num2 = y - segSrc.y;
return((((segVec.x * num) + (segVec.y * num2)) >= 0L) && (((num * num) + (num2 * num2)) <= segVec.sqrMagnitudeLong));
}
public override bool Equals(object o)
{
if (o == null)
{
return(false);
}
FixVector2 num = (FixVector2)o;
return((this.x == num.x) && (this.y == num.y));
}
public static FixVector2 ClampMagnitude(FixVector2 v, int maxLength)
{
long sqrMagnitudeLong = v.sqrMagnitudeLong;
long num2 = maxLength;
if (sqrMagnitudeLong > (num2 * num2))
{
long b = Fix32Math.Sqrt(sqrMagnitudeLong);
int x = (int)Fix32Math.Divide((long)(v.x * maxLength), b);
return(new FixVector2(x, (int)Fix32Math.Divide((long)(v.x * maxLength), b)));
}
return(v);
}
public static bool SegIntersectPlg(ref FixVector2 segSrc, ref FixVector2 segVec, FixVector2[] plg, out FixVector2 nearPoint, out FixVector2 projectVec)
{
nearPoint = FixVector2.zero;
projectVec = FixVector2.zero;
if ((plg == null) || (plg.Length < 2))
{
return(false);
}
bool flag = false;
long num2 = -1L;
int index = -1;
for (int i = 0; i < plg.Length; i++)
{
FixVector2 num;
FixVector2 num5 = plg[(i + 1) % plg.Length] - plg[i];
if (IntersectSegment(ref segSrc, ref segVec, ref plg[i], ref num5, out num))
{
FixVector2 num11 = num - segSrc;
long sqrMagnitudeLong = num11.sqrMagnitudeLong;
if ((num2 < 0L) || (sqrMagnitudeLong < num2))
{
nearPoint = num;
num2 = sqrMagnitudeLong;
index = i;
flag = true;
}
}
}
if (index >= 0)
{
FixVector2 num7 = plg[(index + 1) % plg.Length] - plg[index];
FixVector2 num8 = (segSrc + segVec) - nearPoint;
long num9 = (num8.x * num7.x) + (num8.y * num7.y);
if (num9 < 0L)
{
num9 = -num9;
num7 = -num7;
}
long b = num7.sqrMagnitudeLong;
projectVec.x = (int)Divide((long)(num7.x * num9), b);
projectVec.y = (int)Divide((long)(num7.y * num9), b);
}
return(flag);
}
public static FixVector2 Divide(FixVector2 a, long m, long b)
{
a.x = (int)Divide((long)(a.x * m), b);
a.y = (int)Divide((long)(a.y * m), b);
return(a);
}
public static FixVector2 Divide(FixVector2 a, long b)
{
a.x = (int)Divide((long)a.x, b);
a.y = (int)Divide((long)a.y, b);
return(a);
}
public static FixVector2 Rotate(FixVector2 v, int r)
{
r = r % 4;
return(new FixVector2((v.x * Rotations[r * 4]) + (v.y * Rotations[(r * 4) + 1]), (v.x * Rotations[(r * 4) + 2]) + (v.y * Rotations[(r * 4) + 3])));
}
public static FixVector2 Max(FixVector2 a, FixVector2 b)
{
return(new FixVector2(Math.Max(a.x, b.x), Math.Max(a.y, b.y)));
}
public static long DetLong(FixVector2 a, FixVector2 b)
{
return((a.x * b.y) - (a.y * b.x));
}
public static long DotLong(ref FixVector2 a, ref FixVector2 b)
{
return((a.x * b.x) + (a.y * b.y));
}
public static int Dot(FixVector2 a, FixVector2 b)
{
return((a.x * b.x) + (a.y * b.y));
}
static FixVector2()
{
zero = new FixVector2();
Rotations = new int[] { 1, 0, 0, 1, 0, 1, -1, 0, -1, 0, 0, -1, 0, -1, 1, 0 };
}
public void Max(ref FixVector2 r)
{
this.x = Mathf.Max(this.x, r.x);
this.y = Mathf.Max(this.y, r.y);
}
public static FixVector3 ToInt3XZ(FixVector2 o)
{
return(new FixVector3(o.x, 0, o.y));
}
public static void SegvecToLinegen(ref FixVector2 segSrc, ref FixVector2 segVec, out long a, out long b, out long c)
{
a = segVec.y;
b = -segVec.x;
c = (segVec.x * segSrc.y) - (segSrc.x * segVec.y);
}
public bool Contains(FixVector2 point)
{
return((((point.x >= this.xMin) && (point.x < this.xMax)) && (point.y >= this.yMin)) && (point.y < this.yMax));
}
