/// <summary>
/// 获取弹体截面的一半形状
/// </summary>
/// <returns></returns>
private static vtkPolyData GetBulletSection(ModelingBaseInfo info, SECTIONTYPE reflect)
{//传入弹体参数，返回截面，该截面在ZOY面上
vtkPolyData polyData = vtkPolyData.New();
vtkPoints points = vtkPoints.New();
vtkPolygon polygon = vtkPolygon.New();
// 获取截面 点和拓扑结构
ProcessBulletInfo(info, ref points, ref polygon, reflect);
vtkCellArray cellArray = vtkCellArray.New();
cellArray.InsertNextCell(polygon);
polyData.SetPoints(points);
polyData.SetPolys(cellArray);// 形成半个多边形
return(polyData);
}
/// <summary>
/// 处理弹体信息，根据基本几何建模信息构造polygon（先找出边界点，再放入vtkPolygon中)
/// </summary>
/// <param name="info"></param>
/// <param name="points"></param>
/// <param name="polygon"></param>
/// <param name="reflcet"></param>
private static void ProcessBulletInfo(ModelingBaseInfo info, ref vtkPoints points, ref vtkPolygon polygon, SECTIONTYPE reflcet)
{
points = GetHalfEdgePoint(info);
int numpoints;
if (reflcet == SECTIONTYPE.SECTION_HALF)
{// 如果不做镜像
numpoints = points.GetNumberOfPoints();
}
else
{//如果做镜像,将点的个数增加一倍
points = ReflectPointsByXOZ(points);
numpoints = points.GetNumberOfPoints();
}
polygon.GetPointIds().SetNumberOfIds(numpoints);
for (int i = 0; i < numpoints; i++)
{
polygon.GetPointIds().SetId(i, i);
}
}
