public bool point_in_poly2D(Vector3 point, Sidedness side)
{
var prevIdx = 0;
for (var i = NumPoints - 1; i >= 0; i--)
{
var prevVertex = Vertices[prevIdx];
var vertex = Vertices[i];
var diff = vertex - prevVertex;
// 2d cross product difference?
var diffCross = -(diff.Y * vertex.X) - (diff.X * vertex.Y) + (diff.X * point.Y) + (diff.Y * point.X);
if (side != Sidedness.Positive)
{
if (diffCross < 0.0f)
{
return(false);
}
}
else
{
if (diffCross > 0.0f)
{
return(false);
}
}
prevIdx = i;
}
return(true);
}
public PString(string value, int index, int endIndex, Pos pos, Pos defPos, Sidedness side, Option<object> userState)
{
Value = value;
Index = index;
EndIndex = endIndex;
Pos = pos;
DefPos = defPos;
Side = side;
UserState = userState;
}
public PString(T[] value, int index, int endIndex, Pos pos, Pos defPos, Sidedness side, Option <object> userState)
{
Value = value;
Index = index;
EndIndex = endIndex;
Pos = pos;
DefPos = defPos;
Side = side;
UserState = userState;
}
public PString(string value, int index, int endIndex, Pos pos, Pos defPos, Sidedness side, Option <object> userState)
{
Value = value ?? throw new ArgumentNullException(nameof(value));
Value = value;
Index = index;
EndIndex = endIndex;
Pos = pos;
DefPos = defPos;
Side = side;
UserState = userState;
}
public PString SetSide(Sidedness side) =>
new PString(Value, Index, EndIndex, Pos, DefPos, side, UserState);
public PString <T> SetSide(Sidedness side) => new PString <T>(Value, Index, EndIndex, Pos, DefPos, side, UserState);
