Revit二次开发-Curveloop的放大和缩小

在Revit二次开发工作中，或许会用对Curveloop的放大、缩小、偏移等操作。我们查阅开发手册就可以发现Curveloop这个类提供了Transform这个实例方法，有了这个方法我们对Curveloop进行一些操作，下面是一个简单的Demo，通过放大缩小创建了三块楼板。

• protected override Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)

• {

• var length = 10000 / 304.8;

• var p1 = new XYZ(0, 0, 0);

• var p2 = new XYZ(length, 0, 0);

• var p3 = new XYZ(length, length, 0);

• var p4 = new XYZ(0, length, 0);

• 


• var line1 = Line.CreateBound(p1, p2);

• var line2 = Line.CreateBound(p2, p3);

• var line3 = Line.CreateBound(p3, p4);

• var line4 = Line.CreateBound(p4, p1);

• var curves = new List<Curve>()

• {

• line1,line2,line3,line4

• };

• var curveLoop = CurveLoop.Create(curves);

• var sourceArray = new CurveArray();

• var expansionArray = new CurveArray();

• var reduceArray = new CurveArray();

• foreach (var curve in curveLoop)

• {

• sourceArray.Append(curve);

• }

• var transform = Transform.Identity.ScaleBasis(1.5);

• curveLoop.Transform(transform);

• foreach (var curve in curveLoop)

• {

• expansionArray.Append(curve);

• }

• curveLoop = CurveLoop.Create(curves);

• transform= Transform.Identity.ScaleBasis(0.5);

• curveLoop.Transform(transform);

• foreach (var curve in curveLoop)

• {

• reduceArray.Append(curve);

• }

• RevitDoc.RunTransaction("create floor", () =>

• {

• RevitDoc.Create.NewFloor(expansionArray, false);

• RevitDoc.Create.NewFloor(sourceArray, false);

• RevitDoc.Create.NewFloor(reduceArray, false);

• });

• return Result.Succeeded;

• }

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