Question About Rotating To An Object

#1 This works fine for me, I just copied it into my game and it works and updates perfectly.

if I were to guess I would say somehow the

%this.owner.enableUpdateCallback();

is being disabled, or the

if (!isObject(%this.object))
return;

is stopping it from running?

Drag a sprite over to your scene and attach the Behavior to it, see if that works first.

#2 Thanks so much! Okay, I realized what is wrong. The problem is that when it's mounted to the player, it won't rotate. Is there a way to make it so that when it's mounted to the player it can still preform its function?

#3 Hmm, well I'm not all that familiar with the Mount function, But you could simply update its position instead of mounting it.

remove the mount, and add something like this to the BehaviorTemplate

%template.addBehaviorField(mountobject, "The object to mount", object, "", t2dSceneObject);

and also add something like this to the bottom of FaceObjectBehavior::onUpdate(%this)

%this.owner.setPositionX(%this.mountobject.position.x);  
%this.owner.setPositionY(%this.mountobject.position.y);

This is off the top of my head, so no promises that the syntax is correct :)

#4 You should be able to mount to the player, just need to make sure that the %trackRotation is set to false.
Here's documentation on mounting: tdn.garagegames.com/wiki/TGB/Reference:_t2dSceneObject_Mounting_Methods

#5 So, for example, I'd write this?

Compas.setMountTrackRotation(false)

#6 Or...

mount(%object, [%offset, [%force, [%trackRotation, [%sendToMount, [%ownedByMount, [%inheritAttributes]]]]]])

%object being your player, %offset probably 0, %force 0, %trackRotation 0, %sendToMount 1, %ownedByMount (depends.. but most likely 1), %inheritAttributes 0.. So in the end..

mount($Player, [0, [0, [0, [1, [1, [0]]]]]])

If your player "dies" and is respawned, the owned by Mount attribute will force your object to "die" as well, so it will need re-mounting.

#7 Sounds good! I'm planning on having a trigger with enter/leave callbacks so when you enter it will mount but when you leave it will be deleted. I'll post my code when I'm done.

#8 Great! It's working very well. Here's what I've got:

//-----------------------------------------------------------------------------
// Platformer Starter Kit
// Copyright (C) Phillip O'Shea
//  
// Area Damage - This behavior can be owned by either a Trigger or a Scene
//               Object. If a player enters the trigger it will take damage,
//               and will continue to do so each interval. If an actor
//               collides with a scene object, then it will take damage upon
//               collision.
//-----------------------------------------------------------------------------

if ( !isObject( CompassBehavior ) )
{
    %template = new BehaviorTemplate( CompassBehavior );

    %template.friendlyName = "Compass Area";
    %template.behaviorType = "Miscellaneous";
    %template.description  = "Attach a compass to the player to point to a waypoint.";

    %template.addBehaviorField( PlayerOnly, "Don't effect the other actors.",       BOOL,  true );
}

/// Set up the object
function CompassBehavior::onAddToScene( %this, %scenegraph )
{
    if ( %this.PlayerOnly )
    {
        %this.Owner.setObjectType( "PlayerTrigger" );
        %this.Owner.setCollidesWith( "PlayerObject" );
    }
    else
    {
        %this.Owner.setObjectType( "ActorTrigger" );
        %this.Owner.setCollidesWith( "ActorObject" );
    }
}

/// Attach compass!
function CompassBehavior::onEnter( %this, %theirObject )
{
%Compass = new t2dStaticSprite(Compass) 
   {
      SceneGraph    = Scenewindow2D.getSceneGraph();
      imageMap = "CompasImageMap";
      frame = "0";
      sourceRect = "0 0 0 0";
      canSaveDynamicFields = "1";
      Position = %theirObject.position;
      size = "50.000 50.000";
         mountID = "332";
      _behavior0 = "FaceObjectBehavior	object	Waypoint	turnSpeed	90";
   };

Compass.mount(%theirObject, 0, 0, 0, 1, 1, 0);
Compass.setMountTrackRotation(false);
}

function CompassBehavior::onLeave( %this, %theirObject )
{
Compass.safeDelete();
}

You can get the FaceObjectBehavior off of TDN. One question--why is it that in my platform game when there's a trigger over all the platform objects, the walls don't receive collision?

#9 There have been several posts regarding problematic triggers that can sometimes interfere with Collision, or cause erratic effects. I'm not sure if there's any way to diagnose the problem, and with TGB not being supported, it's rather unlikely anyone other than those still developing with TGB will be able to help.
I'm not sure if there is a solution to your problem that would be easy.. Try adjustments, tinker around with settings, maybe there's a reason.
Hopefully you can find a way to make it work tho, I know it's frustating to make so much progress and then run up to a brick wall so to speak.

#10 Not a problem. I figured it out--I just had to have two triggers. One of them has it's leave callback disabled and the other one, the enter. When you enter, it attaches the compass if you don't already have one. When you leave, it deletes it. In the event of dying where it might not give you the compass back if you spawn between the two triggers, it was simple to add a function in the "onAddToScene" method of the Actor. Now, every time you respawn, it should check to see if you need a compass.