# LookAt / Target property or function for camera or any TCastleTransform

**URL:** https://forum.castle-engine.io/t/lookat-target-property-or-function-for-camera-or-any-tcastletransform/1986
**Category:** Animation
**Created:** [August 2, 2025, 6:30pm UTC](https://forum.castle-engine.io/t/lookat-target-property-or-function-for-camera-or-any-tcastletransform/1986 "2025-08-02T18:30:14Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![michalis](https://forum.castle-engine.io/user_avatar/forum.castle-engine.io/michalis/32/3_2.png) [@michalis](https://forum.castle-engine.io/u/michalis)
#### Post date: [August 3, 2025, 9:18pm UTC](https://forum.castle-engine.io/t/lookat-target-property-or-function-for-camera-or-any-tcastletransform/1986/3 "2025-08-03T21:18:32Z")

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I would say that we give you here the building blocks to make it easy:

- Set the `Direction` (or `Rotation`, or use `SetView` or `WorldSetView`) on any `TCastleTransform` as often as you’d like.

- Do stuff from `Update` methods (overridden in view, or in particular `TCastleTransform` or in behavior).

Indeed, [behaviors](https://castle-engine.io/behaviors) that you mentioned would be my recommendation in many cases. In the simplest case, define a behavior like this:

```delphi
type
  TLookAtBehavior = class(TCastleBehavior)
  public
    Target: TCastleTransform;
    procedure Update(const SecondsPassed: Single; var RemoveMe: TRemoveType); override;
  end;

procedure TLookAtBehavior.Update(const SecondsPassed: Single; var RemoveMe: TRemoveType);
begin
  inherited;
  // Note: No need to normalize direction, it will be done on the engine side.
  Parent.WorldDirection := Target.WorldTranslation - Parent.WorldTranslation;
end;

```

Add a new instance of this class to the `TCastleTransform` that should act as an “observer” . This can be anything, including a camera, since `TCastleCamera` is also a descendant from `TCastleTransform`. Like

```delphi
procedure TMyView.Start;
var
  LookAtBehavior: TLookAtBehavior;
begin
  inherited;
  LookAtBehavior := TLookAtBehavior.Create(FreeAtStop);
  LookAtBehavior.Target := SomeTarget;
  Observer.AddBehavior(LookAtBehavior);
end;

```

This is simplest, and assumes that the `Up` vector of the observer is already good. If not, you can adjust it, once and/or each frame.

I think above can be extended / modified for a particular use-case, so it’s OK that we don’t explicitly provide such behavior ready in the engine, instead giving you “building blocks” to do it on your side… Hm, but it’s a very good example for behaviors! I have added it to [Behaviors | Manual | Castle Game Engine](https://castle-engine.io/behaviors) docs 🙂

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