/// <summary>
/// 多边形边
/// </summary>
/// <param name="_vertexA">顶点A</param>
/// <param name="_vertexB">顶点B</param>
public PolygonEdge2D(PolygonPoint2D _vertexA, PolygonPoint2D _vertexB)
{
vertexA = _vertexA;
vertexB = _vertexB;
List <int> sort = new List <int>()
{
_vertexA.index, _vertexB.index
};
sort.Sort();
StringBuilder sb = new StringBuilder();
foreach (int k in sort)
{
sb.Append(k);
}
key = sb.ToString().UniqueHashCode();
}
/// <summary>
/// 多边形三角形
/// </summary>
/// <param name="_vertexA">顶点A</param>
/// <param name="_vertexB">顶点B</param>
/// <param name="_vertexC">顶点C</param>
public PolygonTriangle2D(PolygonPoint2D _vertexA, PolygonPoint2D _vertexB, PolygonPoint2D _vertexC)
{
//Vector3 ab = (_vertexB.position - _vertexA.position).normalized;
//Vector3 ac = (_vertexC.position - _vertexA.position).normalized;
//Vector3 vc = Vector3.Cross(ab, ac);
//if (vc.z > 0)
//{
// //逆时针三角形，B,C点交换
// PolygonPoint2D p = _vertexC;
// _vertexC = _vertexB;
// _vertexB = p;
//}
vertexs = new PolygonPoint2D[3] {
_vertexA, _vertexB, _vertexC
};
edges = new PolygonEdge2D[3] {
new PolygonEdge2D(_vertexA, _vertexB), new PolygonEdge2D(_vertexB, _vertexC), new PolygonEdge2D(_vertexC, _vertexA)
};
circumCircleCenter = Geometry2DUtility.TriangleCircumCircle(_vertexA.position, _vertexB.position, _vertexC.position);
circumCircleRadius = Vector3.Distance(circumCircleCenter, _vertexA.position);
key = (_vertexA.index.ToString() + _vertexB.index.ToString() + _vertexC.ToString()).UniqueHashCode();
}