Is there a way to check what methods exactly are called on scene's start? And which objects called them? I want to achieve something similar to adding Debug.Log(); to every single method but without doing it. I'd like to know what's going on in a project when I press play.
A scene consists only of game objects (there's nothing else in Unity).
GameObjects may have 1 or more Components attached.
When you click Play ...
It looks like you already know that, the calls such as
void Start()
(if they exist in the script) are called - automatically, by Unity - when each Component on each GameObject is launched with the scene.
It's quite common that inside each Start, you just add something like Debug.Log("starting, script name, on .. " + transform.name) which will simply let you know that that component on that game object has started.
Maybe that's what you need.
Obviously you will have added many functions to your own scripts
void SomeFunction() {
Are you saying you want to know when those functions run?
If so the only way to do that is simply manually add a Debug line, inside each function.
(Regarding functions which you add yourself, example SomeFunction, they are not in any way called automatically. They are only called if you call them (say from Start or similar). You can be sure they are only called if you call them.
Related
I'm creating a game where the player creates objects (blocks) in a "set up" scene and then when the timer ends, I'd like those objects, including their transform values to be loaded into a new scene. How would I go about loading objects created during runtime into a new scene?
DontDestroyOnLoad is a valuable way to achieve this.
What you could also do is the following:
Create an Empty object called "Cross-Scene-Objects" and add a script to it, make it so it doesn't destroy on load. Then simply child any objects to that object, and remove objects as you see fit.
You could also make the CrossSceneObjects script a singleton class and have some basic AddObject and RemoveObject methods which handle putting the game objects under the object.
If you only want certain objects in certain scenes, you could use the method above but add some further logic to set game objects active if you're in the scene you want them to show up in.
I have no example code, but if this is not enough for you to work off I can happily edit to provide code examples :) My style is to first provide the solution steps rather than the code to give you a starting point.
I'm not sure how to switch scenes and bring all of my resources with me. I do understand that upon load of new scene, the previous scene gets destroyed on load. I've explored some with DontDestroyOnLoad() but had no luck with what I'm trying to do.
I tried to make my player controller a prefab and simply put him into the next scene; however, I returned a heck of a lot of errors because of the many scripts I have. Mostly stuff like checkpoint, HP bars, and even the weapon.
What I need to know is how to import everything into the next scene. How do I do this without having to recode or even re-make all of the stuff that I need?
You're looking for LoadSceneMode.Additive. This is the second parameter of the LoadScene method and will load the new scene into the current one.
If you need to import every object from the previous scene, then what's the point in creating a new one?
What you could do is saving the objects positions into a file and then loading that file back on the next scene or try (again) with DontDestroyOnLoad();
I recommend to check the documentation of Unity about this function.
If you want an individual object not to be destroyed on the scene change then on the void Awake() function of Unity make a DontDestroyOnLoad(this.gameObject);
Could you provide more information? I ask because it seems from your description that
DontDestoryOnLoad
should accomplish what you want but you say it does not. As long as the object holding the components whose states you want to save is persisted into the next scene using that method, then all of those components' states should be persisted as well. Please elaborate and we can possibly provide a better answer. As for how to use it to save the state of every game object:
GameObject[] allObjects = UnityEngine.Object.FindObjectsOfType<GameObject>();
foreach(GameObject go in allObjects) {
if (go.activeInHierarchy) { /* and any other logic you want. Maybe like !isTerrain */
Object.DontDestroyOnLoad(go);
}
}
For the above code, I ripped it from https://answers.unity.com/questions/329395/how-to-get-all-gameobjects-in-scene.html
I am using the 3rd party library Google VR in Unity.
Within one C#-source file of that lib, I add a static method call to a class LibClass like this:
void onPrerender() {
MyOwnClass.staticMethod();
(continue with original method call...)
}
But every time I update the library, the call to MyOwnClass.staticMethod() is lost and I have to re-add it manually.
I can not subclass LibClass, because the library would always call LibClass and not LibSubClass.
Is there a way to programmatically add the call to staticMethod() to LibClass? Or any other way?
Edit:
I've been asked to describe the problem better:
OnPreRender is a method of the MonoBehaviour class of Unity.
This method is called before the image of the camera is rendered.
My problem is I need Google VR, which handles 2 separate cameras for each eye, to draw one of the camera images slightly different than the other.
Since OnPreRender is called for each of the cameras, I used this as an entry point for calling a static method in my own class (static only because that way I don't have to instantiate my own class in Google VRs class).
This works fine for many months now, but the Google VR lib is constantly updated and each time I do that, the method call to my own class is lost.
So I was wondering wether it is possible to kind of programmatically say "You there, OnPreRender() in that external class, when you are called by the library, jump over here and do some extra work."
Does that make sense?
You can try using extension methods. Bare in mind this work only for the static calls to object functions.
You can find more:
https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/extension-methods
Since
Application.LoadLevel(level);
deprecated and new SceneManager is proposed, i am asking how to use it to load/get simple parameters like string type and in which functions of lifecycle would be best practise?(such as Start, Awake)
SceneManager.LoadScene("resultScene", chosenOptions);
note to simplify: is there an option besides writing new class such as?
Things in Unity work differently than a native mobile app. You don't need pass the parameters to use them in next scene while loading it. Just add a script on empty object in your first scene which has DontDestroyOnLoad in it and save your values in this script. As this object would presist through out the game life cycle, you can store your values in this script. And update them before loading a new scene. and then use them in start of new scene etc.
You can have a look at callback execution order and choose the method which suits your needs.
Read more about preloaded scene/object
I have a seperate script of time which I use to show time in my scene. It contains hour and minute and seconds variable.I want to do some specified work e.g., code execution on specified time and currently i am doing something like this. in Update. I am running a function which check continously check time variable in order to run an animation.
void Update()
{
checkTrainArriveTime();
}
void checkTrainArriveTime()
{
if (timeManager.GetComponent<Scale2>().hour == trainArriveTimeHour && timeManager.GetComponent<Scale2>().min == trainArriveTimeMin
&& isTrainArriveConditionExecute)
{
isTrainArriveConditionExecute = false;
PlayAnimationClip("Start");
}
else if (timeManager.GetComponent<Scale2>().min != trainArriveTimeMin)
{
isTrainArriveConditionExecute = true;
}
}
As Time will match this function will play the animation. Now I have 50 script attached to 50 different game Object. It is
working fine but It definitely not the right way to use Update Event. In my code, It is necessary to check time on every frame and
extra load on update. Is there any efficient way to do this Job?.
I can see your struggle. You are right, it is definitely not the best way forward.
The best option I can see here would be creating Animation Manager which is a singleton instance (there is only one instance allowed per application).
I would suggest moving your animation triggering logic to an Update method of AnimationManager.
Once you have done that. You will be able to access its instance calling AnimationManager.getInstance() method.
Next step is creating internal registry that would be nothing else than just a list of your registered game objects that you want to trigger animation for.
I don't know what exactly is your timeManager but I can imagine it is probably an instance of TimeManager controller that you drag and drop onto your public timeManager property. Consider turning it into singleton as well or at least moving assignment of timeManager.GetComponent<Scale2>() into Awake() method.
It is important to not to call GetComponent() method from inside of Update()', as it has an impact on performance.GetComponent` is quite expensive to call.
Hope it helps.