9 Replies Latest reply on Jan 22, 2018 4:19 AM by Rob Edwards

    Help with Coordinate transformation

    Prashant Mohan

      Hello Everyone,


      I have cube. When i select i face i wanted to calculate the center of it. I implemented the functionality to get GetSectionProperties2 of the selected object. This gave me the X,Y,Z of the center but in Global coordinates (Model coordinates). I wanted to now transfer the coordinates to the face coordinates of the cube (i wanted to use center of face to do some calculations). I tried implementing a math transform but it is not giving me the right coordinates. I have posten the code for mathtransform below. I tried checking online also but it has examples for sketch to model coordinates and not the other way.


      Any help will be appreciated



      Dim vPtArr As Variant

      Dim Sketch As SldWorks.Sketch

      Dim ModelToSketchTransform As SldWorks.MathTransform


      ReDim vPtArr(3)


      vPtArr(0) = v1(2)  ' v1 is the variant where the 3D sketch point is stored

      vPtArr(1) = v1(3)

      vPtArr(2) = v1(4)


      Debug.Print vPtArr(0)

      Debug.Print vPtArr(1)

      Debug.Print vPtArr(2)


      swSkMgr.InsertSketch True

      Set swMathUtil = swApp.GetMathUtility

      Set swMathPoint = swMathUtil.CreatePoint(vPtArr)

      Set Sketch = swModelDoc.GetActiveSketch2

      Set ModelToSketchTransform = Sketch.ModelToSketchTransform

      Set swMathPoint = swMathPoint.MultiplyTransform(ModelToSketchTransform)


      Dim vModelSelPt    As Variant


      vModelSelPt = swMathPoint.ArrayData

      Debug.Print vModelSelPt(0)

      Debug.Print vModelSelPt(1)

      Debug.Print vModelSelPt(2)



      Prashant Mohan