User:DavidJCobb/Rotation Library Tutorial

Setting up a basic test

under construction

Creating our test object

In the Object Window, filter to Activators. Right-click in the list pane and select "New." Fill out the dialog box as shown below:

Name

Orientation Demo

Model

Clutter\Statues\StatueDibella.nif

Activate Text

Perform Random Test

Obstacle

Checked.

Ignored by Sandbox

Checked.

Now, add the following script to it:

Scriptname CobbOrientationTest extends ObjectReference

Import AtronachCrossingLibraryRotations
Import Utility

;
; These arrays define the position and rotation of the child object RELATIVE 
; to this object. These would be the child's position and rotation if this 
; object were placed at (0, 0, 0) and set to rotation (0, 0, 0).
;
Float[] Property pfPositionOffset Auto
Float[] Property pfRotationOffset Auto
;
; This is the object that we'll be placing.
;
ObjectReference Property pkChildObject = None Auto

Event OnInit()
   UpdateChildPosition()
EndEvent

Event OnActivate(ObjectReference akActionRef)
   RunTest()
EndEvent

Function RunTest()
{Randomize this object's rotation, and then reposition and rotate the child object to match it.}
   SetAngle( RandomInt(0, 359) as float, RandomInt(0, 359) as float, RandomInt(0, 359) as float )
   UpdateChildPosition()
EndFunction

Function UpdateChildPosition()
{Disable physics on the child object, and then position and rotate it to keep it in line with this object.}
   If pkChildObject
      pkChildObject.SetMotionType(4)
      MoveObjectRelativeToObject(pkChildObject, Self, pfPositionOffset, pfRotationOffset)
   EndIf
EndFunction

Finishing up

Now go to any cell (or make your own) and add the new statue to it; place the statue at (0, 0, 0) and do not rotate it. Then, add a Dragon Priest Mask to the cell, and position and rotate it so that it rests on top of the statue's face. Write down the mask's coordinates and rotation.

The properties that I use. I don't have any mods that remesh or retexture the Dibella Statue.

Edit the base activator's script properties. Set pfPositionOffset to an array containing the mask's coordinates; set pfRotationOffset to an array containing the mask's rotation. Edit the placed activator's properties as well: set pkChildObject to the placed mask itself.

Test it!

Load the cell in-game. You'll most likely find your Dragon Priest Mask lying on the floor near the statue. This is normal; we can't usually disable the mask's physics quickly enough OnInit.

The test, as it appears initially.

Walk up to the statue and activate it a few times to randomize its rotation. (The statue's origin lies on its bottom surface, so it may clip through the ground several times. You may need to use the tcl command to view it.) You should find that the mask is positioned properly on the statue's face with every random rotation.

• A few examples of random rotations with correct mask positioning.
• 
• 
• 

Notes

Most applications of this library will follow the same basic format as the setup described above: you'll define the position and rotation of some "child" relative to the "parent," and then apply a script that feeds the child, parent, relative position, and relative rotation into my library.

Examples of parent-child relationships:

• Keeping a Door inside of a door frame that can be moved at run-time
• Keeping a Light anchored to a light source (e.g. wall sconce) that can be moved at run-time
• Repositioning the invisible DummyBookMarkers in a bookshelf, when moving the bookshelf at run-time