public IEnumerable <int> GetVertices(PolygonDirection direction)
{
yield return(A);
yield return(B);
yield return(C);
}
public void SetConvex(Vertex prev, Vertex next, PolygonDirection direction)
{
var a = Position - prev.Position;
var b = next.Position - Position;
var sign = (int)Mathf.Sign(a.x * b.y - a.y * b.x);
IsConvex = sign >= 0 ^ direction == PolygonDirection.ClockWise;
}
public static PolygonDirection TriangleArea2(Vector2 p1, Vector2 p2, Vector2 p3, ref float area)
{
GeoPointsArray2 array = new GeoPointsArray2();
array.mPointArray.Add(p1);
array.mPointArray.Add(p2);
array.mPointArray.Add(p3);
PolygonDirection dir = GeoPolygonUtils.CalculatePolygonArea(array, ref area);
area = area < 0 ? -area : area;
return(dir);
}
public void Initialize()
{
float area = 0.0f;
mDirection = GeoPolygonUtils.CalculatePolygonArea(mPolygon, ref area);
if (mDirection == PolygonDirection.CW)
{
Reverse();
mDirection = PolygonDirection.CCW;
}
else
{
area = -area;
InitializeArray();
}
}
public static int[] Triangulate(IEnumerable <Vector3> points, PolygonDirection direction) => Triangulate(points.Select(p => p.XZ()), direction);
private Triangulator(IEnumerable <Vector2> points, PolygonDirection direction)
{
Vertices = new LinkedList <Vertex>(points.Select((p, i) => new Vertex(p, i)));
Direction = direction;
}
public static int[] Triangulate(IEnumerable <Vector2> points, PolygonDirection direction)
{
var triangulator = new Triangulator(points, direction);
return(triangulator.Triangulate());
}