HWPS-Actions.md

@@ -1048,10 +1048,41 @@ To place additional profiles, it is necessary to work with an additional profile
 
 **`Accessory placement action at the node`** <a name="Accessoryplacementactionatthenode"></a>
 - [return to action list](#TopList)
-- Definition
-- Use case
-- Parameters
-  
+- Definition : this action allows you to place a 3D accessory or reference in an assembly node
+![image](uploads/1401a5d645bbd10421e0e78704570778/image.png)
+- Use case : Assembly procedure
+- Parameters : 
+  - **Item** : Choice of accessory to be placed at the node (reference or 3D)
+  - **Quantity** : at least 1
+  - **Bar index 1** : Identification of the reference bar for positioning the axes of the 3d object
+  - **Profile point** : point on a profile on which the accessory item's marker will be positioned. 
+  - **Bar index 2** : (Optional) 
+   - Note: -1 by default (see below).
+  - **Profile line** : any line of a profile that is on the index bar 2 and that is used to determine the insertion point of the item
+  - **DX** : displacement relative to the point calculated along the X axis
+  - **DY** : displacement relative to the point calculated along the Y axis
+  - **DZ** : displacement relative to the point calculated along the Z axis
+  - **RX** : rotation with respect to the point calculated along the X axis
+  - **RY** : rotation with respect to the point calculated along the Y axis
+  - **RZ** : rotation with respect to the point calculated along the Z axis
+- Conventions:
+![image](uploads/36f0a699bac193c171627842a28fd679/image.png)
+  - The x-axis of the article marker = the direction of bar 1 in the extrusion direction from 1 to 2 
+  - The XZ plane is a vertical plane
+  - The origin of the item reference frame is positioned at the intersection of the point of the profile of bar 1 and : 
+   the profile line of bar 2
+   or of the end of the profile of bar 1 if no indication concerning the index of bar 2 and the line (value of the parameter index bar 2 = -1)
+  - The displacements dx,dy,dz,rx,ry,rz are carried out in the reference frame positioned according to the previous conventions.
+  Note: If parameter index of bar 2 = -1, the insertion point of the item becomes the intersection of the profile point of bar 1 and its end plane.
+![image](uploads/d898df5705e4bbaf0f2761dbf7baf937/image.png)
+
+Note: Orientation of the axes of the 3D object when the reference bar (bar 1) is a hip or column type bar:
+    - Case of a hip: The X axis goes in the direction of the bar, positive from 1 to 2
+    ![image](uploads/b52815bcc78d5fa9b8a7324b8c694b09/image.png)
+    - Case of the pole: 
+The X axis goes in the direction of the bar, positive from 1 to 2.
+The Z axis is perpendicular to the mesh on side 1
+![image](uploads/f033dda9d01240bb72d078eb41345519/image.png)
 --------------------------------------------------------------
 
 **`Action of placing an accessory on an accessory`** <a name="Actionofplacinganaccessoryonanaccessory"></a>