koobas.hobune.stream
How to control the coordinates of newly created gameobject
I want to nullify the z-coordinate for all new gameobjects that get created. I try produce the following behaviour:
Copied gameobjects inherit their z-coordinate
Gameobjects that are dragged from the project view to the scene view get a 0 z-coordinate while being dragged into the scene
Once a gameobject is dropped (mouseUp), I can modify the z-coordinates again, even by dragging in the scene view
We did this in our project. A Scene object has to be selected for it to work, but it's useful. It speeds up our scene construction process.
import UnityEngine
[CustomEditor(Scene)]
class SceneEditor (Editor):
scene as Scene
def Awake():
scene = target as Scene
def OnSceneGUI():
if Event.current.type == EventType.Repaint:
# draw scene-mode warning in scene window
if Event.current.type == EventType.DragPerform:
for r in DragAndDrop.objectReferences:
o = EditorUtility.InstantiatePrefab(r)
go = o as GameObject
go.transform.parent = scene.transform
zeroGround = 0f
ccam = Camera.current
mouseRay = ccam.ScreenPointToRay(Vector3(Event.current.mousePosition.x, ccam.pixelHeight - Event.current.mousePosition.y, 0.0f))
if mouseRay.direction.z > 0.0f:
t = -mouseRay.origin.z / mouseRay.direction.z
mouseWorldPos = mouseRay.origin + t * mouseRay.direction
mouseWorldPos.z = zeroGround
go.transform.position = mouseWorldPos
Event.current.Use()
DragAndDrop.AcceptDrag()
Thanks for sharing this script, you should set this as the accepted answer :)
Never actually needed something like you need, but I have two tips that should help:
if you use CTRL+ALT+SHIFT while dragging an object into the scene, it will attach to surface. It will actually follow geometry so as to allow perfect positioning and stacking
I'm certain you can 'intercept' instantiation by means of an editor script (for example the assetpostprocessor intercepts asset import), but sadly I don't know the right routine you need for this case.
