普通属性 （ActiveX）

签名

工 务 局：

object.Normal

对象

类型：弧，属性，属性引用，块引用，圆形，比较参考，Dim3点角度，Dim对齐，DimAngular，DimArc长度，Dim直径，尺寸，DimOrdinate，DimRadial，DimRadial大，DimRotate，椭圆，外部参考，阴影线，引线，线，LWPoly线，最小块，MText，点，折线，区域，截面，形状，实体，文本，公差，跟踪

此属性适用的对象。

属性值

只读：不

类型：变体（双精度的三元素数组）

WCS 中的 3D 法线单位向量。

言论

此法线向量定义给定对象的Z轴。尽管法线在 WCS 中返回，但它可用于确定对象的 OCS。将坐标与 OCS 之间的坐标转换时，使用此属性作为方法中的 OCSNormal。TranslateCoordinates

请注意，此属性指定向量，而不是点。向量定义法线的方向，而不是空间中的位置。您可以将此法线向量添加到一个点以获得另一个点。

公差：法向量必须垂直于对象的方向。不垂直于“容差”对象的法线将生成错误。Tolerance

例子

工 务 局：

Sub Example_Normal()
    ' This example creates a circle in model space.
    ' It then finds the current normal to that circle
    ' and changes the normal.
    
    ' Define a circle
    Dim circleObj As AcadCircle
    Dim center(0 To 2) As Double
    Dim radius As Double
    center(0) = 4: center(1) = 4: center(2) = 0
    radius = 1
    
    ' Add the circle to model space
    Set circleObj = ThisDrawing.ModelSpace.AddCircle(center, radius)
    ZoomAll
    
    ' Find the normal for the circle
    Dim currNormal As Variant
    currNormal = circleObj.Normal
    MsgBox "The current normal for the circle is " & circleObj.Normal(0) & ", " & circleObj.Normal(1) & ", " & circleObj.Normal(2), , "Normal Example"
    
    ' Change the normal for the circle
    Dim newNormal(0 To 2) As Double
    newNormal(0) = 1: newNormal(1) = 1: newNormal(2) = -1
    circleObj.Normal = newNormal
    circleObj.Update
    MsgBox "The current normal for the circle is " & circleObj.Normal(0) & ", " & circleObj.Normal(1) & ", " & circleObj.Normal(2), , "Normal Example"
    
End Sub

Visual LISP：

(vl-load-com)
(defun c:Example_Normal()
    ;; This example creates a circle in model space.
    ;; It then finds the current normal to that circle
    ;; and changes the normal.
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))

    ;; Define a circle
    (setq center (vlax-3d-point 4 4 0)
          radius 1)
    
    ;; Add the circle to model space
    (setq modelSpace (vla-get-ModelSpace doc))
    (setq circleObj (vla-AddCircle modelSpace center radius))
    (vla-ZoomAll acadObj)
    
    ;; Find the normal for the circle
    (setq currNormal (vlax-variant-value (vla-get-Normal circleObj)))
    (alert (strcat "The current normal for the circle is " (rtos (vlax-safearray-get-element currNormal 0) 2) ", "
                                                           (rtos (vlax-safearray-get-element currNormal 1) 2) ", "
                                                           (rtos (vlax-safearray-get-element currNormal 2) 2)))
    
    ;; Change the normal for the circle
    (setq newNormal (vlax-3d-point 1 1 -1))
    (vla-put-Normal circleObj newNormal)
    (vla-Update circleObj)
    (setq newNormal (vlax-variant-value newNormal))
    (alert (strcat "The current normal for the circle is " (rtos (vlax-safearray-get-element newNormal 0) 2) ", "
                                                           (rtos (vlax-safearray-get-element newNormal 1) 2) ", "
                                                           (rtos (vlax-safearray-get-element newNormal 2) 2)))
)