/// <summary>
/// 计算顶点纹理坐标
/// </summary>
/// <param name="vertex"></param>
/// <param name="edge"></param>
/// <returns></returns>
public bool CalculateTexcoord(Vertex vertex, Edge edge)
{
// 判断该点是否在直线上
if (!CloverMath.IsPointInTwoPoints(vertex.GetPoint3D(), edge.Vertex1.GetPoint3D(), edge.Vertex2.GetPoint3D(), 0.001))
return false;
// 取中间点到其中一点的距离，以及直线长度
Vector3D v1 = vertex.GetPoint3D() - edge.Vertex1.GetPoint3D();
Vector3D v2 = edge.Vertex2.GetPoint3D() - edge.Vertex1.GetPoint3D();
double proportion = v1.Length / v2.Length;
vertex.u = edge.Vertex1.u + proportion * (edge.Vertex2.u - edge.Vertex1.u);
vertex.v = edge.Vertex1.v + proportion * (edge.Vertex2.v - edge.Vertex1.v);
return true;
}
/// <summary>
/// 查找顶点是否在顶点列表中，若存在返回该顶点的索引，若不存在返回-1
/// </summary>
/// <param name="vertex"></param>
/// <returns></returns>
public int IsVertexExist(Vertex vertex)
{
int index = 0;
foreach (List<Vertex> vl in vertexCellTable)
{
if (vl[vl.Count - 1].GetPoint3D() == vertex.GetPoint3D())
return index;
index++;
}
return -1;
}
public bool IsVerticeIn(Vertex v)
{
return IsVerticeIn(v.GetPoint3D());
}
/// <summary>
/// 计算一个面中两点的中垂线，结果在参数从输出
/// </summary>
/// <param name="f"></param>
/// <param name="po"></param>
/// <param name="pd"></param>
/// <param name="t">直线的方向向量</param>
/// <param name="p">直线上的一点</param>
public static bool GetMidperpendicularInFace(Face f, Vertex po, Vertex pd, ref Vector3D t, ref Point3D p)
{
if (CloverMath.IsTwoPointsEqual(po.GetPoint3D(), pd.GetPoint3D(), 0.00001))
{
return false;
}
Point3D pOriginal = po.GetPoint3D();
Point3D pDestination = pd.GetPoint3D();
t = Vector3D.CrossProduct(f.Normal, (pOriginal - pDestination));
p.X = (po.X + pd.X) / 2;
p.Y = (po.Y + pd.Y) / 2;
p.Z = (po.Z + pd.Z) / 2;
return true;
}
