【Revit API】創建相機視角

在Revit中有一個相機功能可以以相機視角產生一個視圖。一開始我在2016中找關鍵詞Camera，但是沒什麼收穫。

其實這個相機功能的真正核心是創建透視視圖：View3D.CreatePerspective(Document, ElementId)

簡單的代碼示例如下：

var uiDocument = commandData.Application.ActiveUIDocument;
var doc = uiDocument.Document;
IEnumerable<ViewFamilyType> viewFamilyTypes = from elem in new FilteredElementCollector(doc).OfClass(typeof(ViewFamilyType))
                                                          let type = elem as ViewFamilyType
                                                          where type.ViewFamily == ViewFamily.ThreeDimensional
                                                          select type;
using (Transaction tran = new Transaction(doc, "[ToolSet] Camera"))
{
    tran.start();
    View3D view3D = View3D.CreatePerspective(doc, viewFamilyTypes.First().Id);
    if (null != view3D)
    {
          var eye = new XYZ(0,0,100);   //相機坐標
          var up = new XYZ(0,0,1);      //上方向
          var forward = new XYZ(3,4,5); //相機到目標點的向量
          view3D.SetOrientation(new ViewOrientation3D(eye, up, forward));
          view3D.DisplayStyle = DisplayStyle.ShadingWithEdges;
    }
    tran.Commit();

    UIDocument RevitUiDoc = new UIDocument(doc);
    RevitUiDoc.ActiveView = view3D;
}

關於上方向：

Autodesk的View3D博客：

https://knowledge.autodesk.com/search-result/caas/CloudHelp/cloudhelp/2017/ENU/Revit-API/files/GUID-A7FA8DBC-830E-482D-9B66-147399524442-htm.html?_ga=2.66804973.2137010315.1527470650-214555019.1525755704