Mstn CE 在COM接口中那个可以画构建棱台实体？

研究一下BsplineSurface.FromCrossSections。参见如下MDL代码的思路，它能绘制任意多个截面扫略而成的体，比简单的棱台体要通用的多。

https://communities.bentley.com/communities/other_communities/bdn_other_communities/b/bdn-blog/posts/creating-smartsolid-by-cross-sections

符工 是否可以根据这个https://communities.bentley.com/communities/other_communities/chinafirst/f/microstation-projectwise/141110/ms-ce-native/427985#427985

两个截面和一条路径做出棱台...请问除了C++函数外 还有其他的函数吗？

试试上边符老师说的BsplineSurface.FromCrossSections，这是c#里边的函数。

试试上边符老师说的BsplineSurface.FromCrossSections，这是c#里边的函数。

谢谢 郭工 符工 BsplineSurface.FromCrossSections可行

Point3d[] aFitPoints = new Point3d[4];
InterpolationCurve oFitCurve = new InterpolationCurveClass();
BsplineCurve[] aCurves = new BsplineCurve[2];
//创建断面1
aFitPoints[0] = app.Point3dFromXYZ(50, 50, 0);
aFitPoints[1] = app.Point3dFromXYZ(50, -50, 0);
aFitPoints[2] = app.Point3dFromXYZ(-50, -50, 0);
aFitPoints[3] = app.Point3dFromXYZ(-50, 50, 0);

ShapeElement s1 = app.CreateShapeElement1(null, aFitPoints);
app.ActiveModelReference.AddElement(s1);
aCurves[0] = new BsplineCurveClass();
aCurves[0].FromElement(s1);
//创建断面2
aFitPoints[0] = app.Point3dFromXYZ(20, 20, 50);
aFitPoints[1] = app.Point3dFromXYZ(20, -20, 50);
aFitPoints[2] = app.Point3dFromXYZ(-20, -20, 50);
aFitPoints[3] = app.Point3dFromXYZ(-20, 20, 50);
ShapeElement s2 = app.CreateShapeElement1(null, aFitPoints);
app.ActiveModelReference.AddElement(s2);
aCurves[1] = new BsplineCurveClass();
aCurves[1].FromElement(s2);

//创建侧面
BsplineSurface surface = new BsplineSurfaceClass();
surface.FromCrossSections(aCurves, MsdBsplineSurfaceDirection.U, 4, false, true);
BsplineSurfaceElement oSurface = app.CreateBsplineSurfaceElement1(null, surface);
oSurface.Color = 4;
ElementEnumerator ee= app.SmartSolid.ConvertToSmartSolidElement(oSurface);
SmartSolidElement sse = null;
while (ee.MoveNext()) {
    if (ee.Current.IsSmartSolidElement) {
        sse = ee.Current.AsSmartSolidElement;
        sse.CapSurface();
        app.ActiveModelReference.AddElement(sse);
    }
}