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.