CATIA VBA DrawingView .X .xAxisData对比解析

* Property xAxisData( ) As double

Returns or sets the x coordinate of the drawing view coordinate system origin. It is expressed with respect to the sheet coordinate system. This coordinate, like any length, is measured in millimeters.
Warning: This method is not available with 2D Layout for 3D Design.
Example:
This example retrieves the x coordinate of the coordinate system origin of the MyView drawing view.
X = MyView.xAxisData

* Property x( ) As double

For an interactive view, get_x and put_x methods are equivalents to get_xAxisData, put_xAxisData In a generative case, get_x. put_x returns or sets the x coordinate of the projection of the 3D centre of gravity. It is expressed with respect to the sheet coordinate system. This coordinate, like any length, is measured in millimeters.
Warning: This method is not available with 2D Layout for 3D Design.
Example:
This example retrieves the x coordinate of the view relative position MyView.
X = MyView.x

* Property yAxisData( ) As double

Returns or sets the y coordinate of the drawing view coordinate system origin. It is expressed with respect to the sheet coordinate system. This coordinate, like any length, is measured in millimeters.
Warning: This method is not available with 2D Layout for 3D Design.
Example:
This example sets the y coordinate of the coordinate system origin of the MyView drawing view to 5 inches. You need first to convert the 5 inches into millimeters.
NewYCoordinate = 5*25.4
MyView.yAxisData = NewYCoordinate

* Property y( ) As double

For an interactive view, get_y and put_y methods are equivalents to get_yAxisData, put_yAxisData In a generative case, get_y. put_y returns or sets the y coordinate of the projection of the 3D centre of gravity. It is expressed with respect to the sheet coordinate system. This coordinate, like any length, is measured in millimeters.
Warning: This method is not available with 2D Layout for 3D Design.
Example:
This example sets the y coordinate of the view relative position MyView to 5 inches. You need first to convert the 5 inches into millimeters.
NewYCoordinate = 5*25.4
MyView.y = NewYCoordinate

以上为官方API说明，具体对比效果如下：

• 使用.xAxisData .yAxisData

    factory.CreateCircle oXY(0) - view.xAxisData, oXY(2) - view.yAxisData, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(0) - view.xAxisData, oXY(3) - view.yAxisData, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(1) - view.xAxisData, oXY(2) - view.yAxisData, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(1) - view.xAxisData, oXY(3) - view.yAxisData, 3, 0, 2 * Dpi

.xAxisData .yAxisData

• 使用.X .Y

    factory.CreateCircle oXY(0) - view.X, oXY(2) - view.Y, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(0) - view.X, oXY(3) - view.Y, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(1) - view.X, oXY(2) - view.Y, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(1) - view.X, oXY(3) - view.Y, 3, 0, 2 * Dpi

.X .Y

可以发现.xAxisData .yAxisData 表示的是视图中心，而.X .Y指代的是视图对应的3D图形的原点位置。

以下为完整.xAxisData .yAxisData代码参考，.X .Y可如法炮制：

Sub testCarLine()
    Dim sheet As DrawingSheet
    Set sheet = CATIA.ActiveDocument.Sheets.ActiveSheet
    Dim mainView As DrawingView
    Set mainView = sheet.Views.Item(1)
    mainView.Activate
    
    For i = 3 To sheet.Views.Count
        Set view = sheet.Views.Item(i)
        drawCircles view
    Next
End Sub

Sub drawCircles(view)
    Dim oXY(4)
    view.SIZE oXY()
    
    Dim factory As Factory2D
    Set factory = view.Factory2D   

    view.Activate

    factory.CreateCircle oXY(0) - view.xAxisData, oXY(2) - view.yAxisData, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(0) - view.xAxisData, oXY(3) - view.yAxisData, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(1) - view.xAxisData, oXY(2) - view.yAxisData, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(1) - view.xAxisData, oXY(3) - view.yAxisData, 3, 0, 2 * Dpi

End Sub

细心的朋友注意到以下代码：

    For i = 3 To sheet.Views.Count

这里i从3开始，原因是一个sheet里的views.item(1)代表MainView，views.item(2)代表BackgroundView

    factory.CreateCircle oXY(0) - view.xAxisData, oXY(2) - view.yAxisData, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(0) - view.xAxisData, oXY(3) - view.yAxisData, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(1) - view.xAxisData, oXY(2) - view.yAxisData, 3, 0, 2 * Dpi
    factory.CreateCircle oXY(1) - view.xAxisData, oXY(3) - view.yAxisData, 3, 0, 2 * Dpi

上面的Dpi代表的是pi弧度。

DrawingView