如何让曲线实体在曲面实体的两侧都可见？

Question

我对视力还很陌生，所以如果我遗漏了一些明显的东西，请告诉我。

我有一个与平面相交的混合曲面，试图在我的曲面上获得“网格”线。问题是曲线只显示在表面的内侧，我希望它们在两侧都可见。

我的方法是否有可行的调整，或者是否有更好的方法来实现我想要的？

下面的通用代码示例。

  // Define lists to hold curves and points  
  List<devDept.Eyeshot.Entities.ICurve> curveList = new List<devDept.Eyeshot.Entities.ICurve>();
  List<devDept.Geometry.Point3D> points = new List<devDept.Geometry.Point3D>();

  // Add points to a new curve
  points.Add(new devDept.Geometry.Point3D(0, 0, -1));
  points.Add(new devDept.Geometry.Point3D(0, 1, 1));
  curveList.Add(devDept.Eyeshot.Entities.Curve.GlobalInterpolation(points, 3));
  
  // Add points to a second new curve
  points.Clear();
  points.Add(new devDept.Geometry.Point3D(1, 0, -1));
  points.Add(new devDept.Geometry.Point3D(1, 1, 1));
  curveList.Add(devDept.Eyeshot.Entities.Curve.GlobalInterpolation(points, 3));
  
  // Create the surface
  devDept.Eyeshot.Entities.Surface loft1 = devDept.Eyeshot.Entities.Surface.Loft(curveList, 3)[0];

  // Generate a list of entities to render
  devDept.Eyeshot.EntityList entities = new devDept.Eyeshot.EntityList();
  entities.Add(loft1, Color.PeachPuff);

  // Intersect the surface with a horizontal plane at z == 0
  List<ICurve> sectionLine1 = loft1.IntersectWith(new Plane(new devDept.Geometry.Point3D(0, 0, 0), new Vector3D(0, 0, 1)), 1e-1).ToList();
  entities.Add((Entity)sectionLine1[index], Color.Black);

  // Show in the Eyeshot model
  modelVisualiser.Clear();
  modelVisualiser.Entities.AddRange(preview);
  modelVisualiser.Invalidate();

Answer 1

我会尝试本文中描述的方法：https://devdept.zendesk.com/hc/en-us/articles/360015256013-How-do-I-draw-a-Line-entity-that-would-be-shown-above-all-other-entities-

如何让曲线实体在曲面实体的两侧都可见？

How can I get curve entities to be visible on both sides of a surface entity?

eyeshot