利用Civil 3D API更改曲面的样式

如果你需要更改曲面的样式，比如更改等高线的颜色等等，在Civil 3D中，你可以通过在toolspace中选中曲面，然后点右键选择“Edit surface style…”然后切换到“Display” tab 来更改，:

下面的通过代码的方式使用API来实现同样的效果:

[CommandMethod("MyGroup", "SurfaceStyleExample",     "SurfaceStyleExample", CommandFlags.Modal)]public void MyCommand() // This method can have any name{     Document doc = Application.DocumentManager.MdiActiveDocument;        if (doc != null)    {        Editor ed = Application.DocumentManager            .MdiActiveDocument.Editor;

        

        // select a tin surface

        PromptEntityOptions peo = new PromptEntityOptions(          "\nSelect a tin surface: ");        peo.SetRejectMessage("\nOnly Tin surface is accepted");        peo.AddAllowedClass(typeof(TinSurface), true);        PromptEntityResult per = ed.GetEntity(peo);        if (per.Status != PromptStatus.OK) return;

        CivilDocument civilDoc = CivilApplication.ActiveDocument;

        using (Transaction trans = doc.TransactionManager            .StartTransaction())        {            TinSurface surface = trans.GetObject(per.ObjectId,                 OpenMode.ForRead) as TinSurface;

            //exclude invalid points， 附赠功能，排除异常点

            surface.BuildOptions.ExecludeMaximumElevation = true;            surface.BuildOptions.MaximumElevation = 5000;            surface.BuildOptions.ExecludeMinimumElevation = true;            surface.BuildOptions.MinimumElevation = 200;

            //set the Maximum Triangle Length，设置三角形最大边长

            surface.BuildOptions.MaximumTriangleLength = 200;

            //change the style， 下面开始更改样式了            ObjectId styleId;            if (civilDoc.Styles.SurfaceStyles.Contains("Standard"))            {                styleId = civilDoc.Styles.SurfaceStyles["Standard"];            }            else            {                // create a new style called ‘example style‘:                styleId = civilDoc.Styles.SurfaceStyles                    .Add("example style");

            }                        

            // modify the style

            SurfaceStyle surfaceStyle = styleId.GetObject(                OpenMode.ForWrite) as SurfaceStyle;

            //countours smoothing 

            surfaceStyle.ContourStyle.SmoothContours = true;            surfaceStyle.ContourStyle.SmoothingType                 = ContourSmoothingType.AddVertices;            surfaceStyle.ContourStyle.SmoothingFactor = 10;

            surfaceStyle.ContourStyle.MajorContourColorScheme                 = ColorSchemeType.Rainbow;

            //Major contour, red

            surfaceStyle.GetDisplayStylePlan(                SurfaceDisplayStyleType.MajorContour).Color                 = Autodesk.AutoCAD.Colors.Color.FromRgb(255, 0, 0);

            //Major contour, layer 0

            surfaceStyle.GetDisplayStylePlan(                SurfaceDisplayStyleType.MajorContour).Layer = "0";

            //Mainor contour, gree

            surfaceStyle.GetDisplayStylePlan(                SurfaceDisplayStyleType.MinorContour).Color                 = Autodesk.AutoCAD.Colors.Color.FromRgb(0, 255, 0);

            //Mainor contour, layer 0， 如果你要放在其他图层，要确保该图层存在

            surfaceStyle.GetDisplayStylePlan(                SurfaceDisplayStyleType.MajorContour).Layer = "0";

            // display major contours:

            surfaceStyle.GetDisplayStylePlan(SurfaceDisplayStyleType                .MajorContour).Visible = true;            surfaceStyle.GetDisplayStylePlan(SurfaceDisplayStyleType                .MinorContour).Visible = true;

            // turn off display of other items:                        surfaceStyle.GetDisplayStylePlan(SurfaceDisplayStyleType                .UserContours).Visible = false;            surfaceStyle.GetDisplayStylePlan(SurfaceDisplayStyleType                .Directions).Visible = false;            surfaceStyle.GetDisplayStylePlan(SurfaceDisplayStyleType                .Elevations).Visible = false;            surfaceStyle.GetDisplayStylePlan(SurfaceDisplayStyleType                .Slopes).Visible = false;            surfaceStyle.GetDisplayStylePlan(SurfaceDisplayStyleType                .SlopeArrows).Visible = false;            surfaceStyle.GetDisplayStylePlan(SurfaceDisplayStyleType                .Watersheds).Visible = false;

            //TODO: do the same for all model display settings as well            // 

            // assign the style to the first surface in the document:                       surface.StyleId = styleId;

            // commit the transaction

            trans.Commit();

            //rebuild the surface             surface.Rebuild();        }

    }

}

改之前的样子:

运行之后，等高线的颜色已经改变了.

Hope this helps.