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AutoCAD 2023 开发者帮助

DirectionVector 属性（ActiveX）

2024-5-18 18:56| 发布者: admin| 查看: 143| 评论: 0|原作者: admin|来自: AutoCAD

指定光线、公差或 x 线通过矢量的方向。

支持的平台：仅限 Windows

签名

VBA：

object.DirectionVector

对象

类型：射线、公差、XLine

此属性应用于的对象。

属性值

只读：不

类型：变体（双打的三元素阵列）

射线、公差或构造线（XLine）的方向。

言论

没有其他评论。

例子

VBA：

Sub Example_DirectionVector()
    ' This example creates a ray and then changes the direction vector
    ' for the ray.
    
    Dim rayObj As AcadRay
    Dim basePoint(0 To 2) As Double
    Dim SecondPoint(0 To 2) As Double
    Dim newDirectionVec(0 To 2) As Double
    
    basePoint(0) = 3#: basePoint(1) = 3#: basePoint(2) = 0#
    SecondPoint(0) = 1#: SecondPoint(1) = 3#: SecondPoint(2) = 0#
    
    ' Create a Ray object in model space
    Set rayObj = ThisDrawing.ModelSpace.AddRay(basePoint, SecondPoint)
    ZoomAll
    MsgBox "The ray has a direction vector of " & rayObj.DirectionVector(0) & ", " & rayObj.DirectionVector(1) & ", " & rayObj.DirectionVector(2), vbInformation, "DirectionVector Example"
    
    ' Change the direction vector
    newDirectionVec(0) = 3#: newDirectionVec(1) = 1#: newDirectionVec(2) = 0#
    rayObj.DirectionVector = newDirectionVec
            
    ' Query the new direction vector for the Ray
    Dim retDir As Variant            ' Note that return from DirectionVector property is Variant and not a SafeArray
    retDir = rayObj.DirectionVector
    
    ThisDrawing.Regen True
    MsgBox "The direction vector of the ray has been changed to " & rayObj.DirectionVector(0) & ", " & rayObj.DirectionVector(1) & ", " & rayObj.DirectionVector(2), vbInformation, "DirectionVector Example"
    
End Sub

可视化 LISP：

(vl-load-com)
(defun c:Example_DirectionVector()
    ;; This example creates a ray and then changes the direction vector
    ;; for the ray.
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))

    (setq basePoint (vlax-3d-point 3 3 0)
          SecondPoint (vlax-3d-point 1 3 0))
    
    ;; Create a Ray object in model space
    (setq modelSpace (vla-get-ModelSpace doc))  
    (setq rayObj (vla-AddRay modelSpace basePoint SecondPoint))
    (vla-ZoomAll acadObj)
  
    (setq vDirection (vlax-safearray->list (vlax-variant-value (vla-get-DirectionVector rayObj))))
    (alert (strcat "The ray has a direction vector of "
	           "\n" (rtos (nth 0 vDirection) 2) "," (rtos (nth 1 vDirection) 2) "," (rtos (nth 2 vDirection) 2)))
    
    ;; Change the direction vector
    (setq newDirectionVec (vlax-3d-point 3 1 0))
    (vla-put-DirectionVector rayObj newDirectionVec)
            
    ;; Query the new direction vector for the Ray
    (setq retDir (vlax-safearray->list (vlax-variant-value (vla-get-DirectionVector rayObj))))
    
    (vla-Regen doc :vlax-true)
    (alert (strcat "The direction vector of the ray has been changed to "
	           "\n" (rtos (nth 0 retDir) 2) "," (rtos (nth 1 retDir) 2) "," (rtos (nth 2 retDir) 2)))
)