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You specify units value that cannot be converted to pixels
Rank: Advanced Member
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Joined: 3/3/2008(UTC)
Posts: 185
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Hi, We have a code as below to "reset" the vobject angle. But, sometimes, it does crash... and here are the error message that we get... Mod - _PaneDesign, Proc - ResetAngle, Ln 10 5 - You specify units value that cannot be converted to pixels.(Aurigma.GraphicsMill) May I know what can we do to prevent this? Thanks. Code:
Public Sub ResetAngle()
Const ProcedureName = "ResetAngle"
1: Try
2: Dim obj As Aurigma.GraphicsMill.WinControls.VObject
3: For Each obj In _mlvMain.CurrentDesigner.VObjects
4: If TypeOf obj Is Aurigma.GraphicsMill.WinControls.ImageVObject Then
5: Dim corners As System.Drawing.PointF() = GetTransformedCornerPoints(obj)
6: Dim angle As Single = CalcAngle(New System.Drawing.PointF(1000, 0), New System.Drawing.PointF(corners(1).X - corners(0).X, corners(1).Y - corners(0).Y))
7: Dim point As New PointF(obj.GetVObjectBounds.Width / 2, obj.GetVObjectBounds.Height / 2)
8: If angle <> 0 Then
9: obj.Transform.RotateAt(-angle, point)
10: obj.Update()
11: End If
12: ElseIf TypeOf obj Is Aurigma.GraphicsMill.WinControls.TextVObject Then
13: Dim corners As System.Drawing.PointF() = GetTextTransformedCornerPoints(obj)
14: Dim angle As Single = CalcAngle(New System.Drawing.PointF(1000, 0), New System.Drawing.PointF(corners(1).X - corners(0).X, corners(1).Y - corners(0).Y))
15: Dim point As New PointF(obj.GetVObjectBounds.X + obj.GetVObjectBounds.Width / 2, obj.GetVObjectBounds.Y + obj.GetVObjectBounds.Height / 2)
16: If angle <> 0 Then
17: obj.Transform.RotateAt(-angle, point)
18: obj.Update()
19: End If
20: End If
21: Next
22: Catch ex As Exception
23: WriteErrLog(Err.Number, Err.Source, Err.Description, gstrModule, ProcedureName, Err.Erl)
24: End Try
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Rank: Advanced Member
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Joined: 3/9/2008(UTC)
Posts: 554
Was thanked: 1 time(s) in 1 post(s)
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Hi Ching-Yen, We tried to investigate your problem but we have not the code of these functions from your code: GetTransformedCornerPoints(obj) GetTextTransformedCornerPoints(obj) Could you please send me the code of these functions. Edited by user Friday, May 8, 2009 4:02:43 PM(UTC)
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Rank: Advanced Member
Groups: Guest
Joined: 3/3/2008(UTC)
Posts: 185
Thanks: 8 times
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Public Function GetTransformedCornerPoints(ByVal obj As Aurigma.GraphicsMill.WinControls.ImageVObject) As System.Drawing.PointF()
Const ProcedureName = "GetTransformedCornerPoints"
1: Dim baseRect As System.Drawing.RectangleF = obj.GetVObjectBounds()
2: Dim cornerPnts As System.Drawing.PointF() = New System.Drawing.PointF(3) {}
3: Try
4: cornerPnts(0) = baseRect.Location
5: cornerPnts(1) = New System.Drawing.PointF(baseRect.Right, baseRect.Top)
6: cornerPnts(2) = New System.Drawing.PointF(baseRect.Right, baseRect.Bottom)
7: cornerPnts(3) = New System.Drawing.PointF(baseRect.Left, baseRect.Bottom)
8: obj.Transform.TransformPoints(cornerPnts)
9: Catch ex As Exception
10: WriteErrLog(Err.Number, Err.Source, Err.Description, gstrModule, ProcedureName, Err.Erl)
11: Finally
12: End Try
13: Return cornerPnts
End Function
Public Function GetTextTransformedCornerPoints(ByVal obj As Aurigma.GraphicsMill.WinControls.TextVObject) As System.Drawing.PointF()
1: Dim baseRect As System.Drawing.RectangleF = obj.GetVObjectBounds()
2: Dim cornerPnts As System.Drawing.PointF() = New System.Drawing.PointF(3) {}
Const ProcedureName = "GetTextTransformedCornerPoints"
3: Try
4: cornerPnts(0) = baseRect.Location
5: cornerPnts(1) = New System.Drawing.PointF(baseRect.Right, baseRect.Top)
6: cornerPnts(2) = New System.Drawing.PointF(baseRect.Right, baseRect.Bottom)
7: cornerPnts(3) = New System.Drawing.PointF(baseRect.Left, baseRect.Bottom)
8: obj.Transform.TransformPoints(cornerPnts)
9: Catch ex As Exception
10: WriteErrLog(Err.Number, Err.Source, Err.Description, gstrModule, ProcedureName, Err.Erl)
11: Finally
12: End Try
13: Return cornerPnts
End Function
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Rank: Advanced Member
Groups: Guest
Joined: 3/9/2008(UTC)
Posts: 554
Was thanked: 1 time(s) in 1 post(s)
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Hi, Thanks for the code. We found the reason of your problem. Try the following code: Code:Private Shared Function CalcAngle( _
ByVal v0 As System.Drawing.PointF, _
ByVal v1 As System.Drawing.PointF) As Single
Dim dotProduct As Single = v0.X * v1.X + v0.Y + v1.Y
Dim vLengthProduct As Single = CalcLength(v0) * CalcLength(v1)
If vLengthProduct < 0.01 Then
Throw New ApplicationException("Ups, div by zero error...")
End If
'this is the fix. The argument of Acos() should be in [0, 1] interval
Dim cosValue As Double = Math.Min(1.0F, dotProduct / vLengthProduct)
cosValue = Math.Max(-1.0F, cosValue)
Dim result As Single = CType(Math.Acos(cosValue) / Math.PI * 180, Single)
Dim vecProduct As Single = v0.X * v1.Y - v0.Y * v1.X
If vecProduct < 0 Then
result = 360 - result
End If
Return result
End Function
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You specify units value that cannot be converted to pixels
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