// Return true if the three points form an ear.
private static bool FormsEar(List <Vector2> vertices, int A, int B, int C)
{
if (GetAngle(vertices[A], vertices[B], vertices[C]) > 0)
{
return(false);
}
var triangleVertexA = vertices[A];
var triangleVertexB = vertices[B];
var triangleVertexC = vertices[C];
for (var i = 0; i < vertices.Count; i++)
{
if (i != A && i != B && i != C)
{
if (FixedMath.PointInTriangle(vertices[i], triangleVertexA, triangleVertexB, triangleVertexC))
{
return(false);
}
}
}
return(true);
}