revit空间三维坐标与视图窗口坐标互相转换

revit坐标转换,空间三维坐标点(即revit的世界坐标) ,与视图窗口坐标(以视图窗口客户区左上角为原点,非屏幕左上角)的互相转换。

    [Transaction(TransactionMode.Manual)][Regeneration(RegenerationOption.Manual)][Journaling(JournalingMode.NoCommandData)]class TTestCmd : IExternalCommand{protected Application m_app;protected Document m_doc;protected UIApplication m_uiApp;protected UIDocument m_uiDoc;public Result Execute(ExternalCommandData commandData, ref string messages, ElementSet elements){this.m_uiApp = commandData.Application;this.m_uiDoc = this.m_uiApp.ActiveUIDocument;this.m_app = this.m_uiApp.Application;this.m_doc = this.m_uiDoc.Document;Reference refer = null;try{refer = this.m_uiDoc.Selection.PickObject(ObjectType.Element, "PickObject Element");}catch{}if (refer == null)return Result.Failed;System.Drawing.PointF ptScreen = GetTransPtRevitToScreen(this.m_uiDoc, refer.GlobalPoint);return Result.Failed;}public static double Hypot(params double[] arD){double dSum = 0;foreach (double dT in arD){dSum += Math.Pow(dT, 2);}return Math.Sqrt(dSum);}public static XYZ GetTransPtScreenToRevit(UIDocument uiDoc, System.Drawing.PointF ptScreen){Transform mat = GetTransPtRevitToScreenInternal(uiDoc);if (mat == null)return null;return mat.Inverse.OfPoint(new XYZ(ptScreen.X, ptScreen.Y, 0));}private static System.Drawing.PointF GetTransPtRevitToScreen(UIDocument uiDoc, XYZ ptRevit){Transform mat = GetTransPtRevitToScreenInternal(uiDoc);if (mat == null)return System.Drawing.PointF.Empty;XYZ ptScreen = mat.OfPoint(ptRevit);return new System.Drawing.PointF(Convert.ToSingle(ptScreen.X), Convert.ToSingle(ptScreen.Y));}private static Transform GetTransPtRevitToScreenInternal(UIDocument uiDoc){if (uiDoc == null)return null;Autodesk.Revit.DB.View view = uiDoc.ActiveView;if (view == null)return null;UIView uiView = uiDoc.GetOpenUIViews().FirstOrDefault(p => p.ViewId.IntegerValue == view.Id.IntegerValue);if (uiView == null)return null;REVIT_RECT windowRectangle = uiView.GetWindowRectangle();IList zoomCorners = uiView.GetZoomCorners();if (zoomCorners.Count < 2)return null;double dDisCorner = zoomCorners[0].DistanceTo(zoomCorners[1]);if (dDisCorner < uiDoc.Application.Application.ShortCurveTolerance)return null;double dScale = Hypot(windowRectangle.Right - windowRectangle.Left, windowRectangle.Bottom - windowRectangle.Top) / dDisCorner;Transform matCrop = view.CropBox.Transform;Transform mat = Transform.Identity;mat.BasisX = new XYZ(matCrop.BasisX.X, -matCrop.BasisY.X, 0);mat.BasisY = new XYZ(matCrop.BasisX.Y, -matCrop.BasisY.Y, 0);mat.BasisZ = new XYZ(matCrop.BasisX.Z, -matCrop.BasisY.Z, 1);//"1"并没有作用,只是为了可以求逆而已mat.Origin = new XYZ(-zoomCorners[0].DotProduct(matCrop.BasisX), zoomCorners[1].DotProduct(matCrop.BasisY), 0);mat = mat.ScaleBasisAndOrigin(dScale);mat.Origin += new XYZ(windowRectangle.Left, windowRectangle.Top, 0);return mat;}}

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