Let's Try Assignments Q&A

This is the official thread for discussion, issues and Q&A for the Let's Try tutorial assignments.

Please use this thread if you have any questions, issues or feedback on this series.

The Let's Try series is a set of tutorials on our Learn Site:
http://www.unity3d.com/learn/tutorials/lets-try


In our Let's Try series of tutorials we will explore popular game mechanics in standalone assignments. Instead of creating an entire game, we will focus on a single mechanic and the techniques needed to implement it.

Post your questions and the team and we will try to help you out!

IMPORTANT:
If you want to post a script you are having trouble with, please post the whole script that is throwing an error using proper code formatting detailed in the thread below, a screenshot of the public variables in the inspector and copy and paste the error message from the console if there is one.

http://forum.unity3d.com/threads/using-code-tags-properly.143875/

Known Issues:

• Please turn "annotations" on, as we try to annotate these videos if any issues are found. Many people turn annotations off, and miss these comments.

 

It seems the free download asset pack opens in Unity without a download button.

 

is that the web link for the asset store showing Open in Unity? as it wont give option for download until you have the asset store open within the editor. (i believe)

Should ask you to download once you opened it in Unity, then once downloaded the button will change to Import.
or, with Unity editor open, go to Window > Asset Store and search for 'Lets try' from Unity Technologies and it should download and Import from there.

 

Thank you!

I had a download button. Maybe you need to wait that the window is fully loaded?

 

Upgrading from 5.3 to 5.4 fixed it.

 

i keep getting errors on the crossplatforminput

should i do something about or should i leave it there?

 

That will be for the FPS controller. You could try re-importing the 'Characters' package from Assets > Import Package.

 

I am not able to access Psychics class at all (Raycast shooting).

It just gives me Compiler errors, it worked in earlier tutorials.

Edit: Just realised i misspelled physics... Problem solved. I am dumb.

 

If i shot down my shot stop going on and doesn't hit the floor,it returns to the player in the opposite verse, can you help me??

 

hello sir,i have a issue on my game is i want my enemy fire a bolt to damage player with raycasthit but the raycasthit cant damage the player and it just like that https://mega.nz/#!3xkXHJDI!L8IqMglFFg-no82moxqQ57BaNNOhC_2kDf1CHJCnvag and please help me solve there are my scriptshttps://mega.nz/#!Hp0zlJ4L!LupVqDPA-yXUUgB98HRB3Whh21iej0gvyAL8oA1uzGA
andhttps://mega.nz/#!Hp0zlJ4L!LupVqDPA-yXUUgB98HRB3Whh21iej0gvyAL8oA1uzGA

 

It seems that the grenade mesh is missing from the asset package.

 

Hi, I'm having trouble dragging the GunEnd game object into the Gun End field in the Raycastshoot (script) section of the inspector menu as the Gun End field isn't there! Help!

 

It seems that the raycast is interacting with the character's collider. Look at the Character Controller component for the FPSController GameObject in the Scene:



If you want to see this in-game, alter your RayCastShoot script to redraw laserLine every update (so you won't have to switch back to the Game view and click to see the results). For example, I changed the first few lines of the Update() function in RayCastShoot.cs to this:



If you play with the Radius, Height, or Center options on the Character Controller, you can see when the laserLine starts/stops interacting with the character's collider.

The fix is simple: Change the Layer of the FPSController to "IgnoreRaycast." When the dialog asks you if you want to change the children, say No. It isn't necessary to change the child objects to fix this issue.

Side note: I don't yet understand why the ray is being cast back into the camera when this interaction happens. There may be some underlying issue that I haven't discovered yet, but ignoring raycasts onto the character's collider seems to solve the obvious problem.

Hope that helps!

 

Hi , I want to go to next level? or next stage...But how..? Please tell me. Or Originally it have been only one stage?

 

How do i make the camera move when the mouse is moving?

 

https://unity3d.com/learn/tutorials/projects/2d-roguelike-tutorial/adding-ui-level-transitions
and
I saw this on several of the live training videos but cant find which ones right now, but yeah, there's lots of references if you can look

 

http://answers.unity3d.com/questions/149022/how-to-make-camera-move-with-the-mouse-cursors.html

 

Thanks!

 

I'm starting the tutorial and when told to put the C# script into the gun prephab it says
"Can't add script component 'RaycastShoot' because the script class cannot be found"
what can I do?

 

Please check to make sure that the gunEnd variable has the 'public' access modifier and that your script is compiling without errors.

 

There is only one stage. It's a tutorial not a game.

 

Make sure that your script file and C# class have matching names.

 

Hello I am having a issue with the assignment. I am using the code for my game project for school.

My issue is when you look down. The Raycast shoots back towards the camera instead of straight ahead.
I set up my scripts and everything just like the tutorial. The game works fine but when I look down from a FPS perceptive
it looks like the raycast isn't going all the way forward just stops half way. I looked at this in the scene view and the Ray shot shoots back towards the camera.

Please help...

 

Shindy, if you read the forum posts above yours specifically read the post by murphjac which sounds like the issue you're having.

 

Your HTTPS connection is insecure and unsafe. I would highly recommend hosting your images somewhere else such as https://httpsimage.com/ (although there are many, many choices).

 

Hey, I just got Unity and thought this game was cool, so i tried it out. Turns out he tutorial doesn't tell you how to 'expand' a C# script so you can drag things into it. I was wondering how to do it.

 

Scripting doesn't specifically work like that. You would need to declare a public object reference in the script and then drag and drop items in the Game Inspector in Unity onto the SCcript file found on the object.

Quick example:

In a script add a line underneath your class declaration and before your method calls:

public GameObject $gobject; within the class.

then save, And open your object in the Unity GUI, and add this script to that object, by dragging and dropping. Then you can select the other game object you want `$gobject` to reference and drag it into the script file area in the Inspector. Perhaps watching some Unity Videos will show you the areas to look at for doing this.

 

Hi,

I recently download the Let's try Shooter pack and that I get a warning message saying that The Referenced script on this behavior is missing (game object 'Gun' ). I think is is why I cannot fire the gun. Any help?

 

I get the same warning message even if I try the completed scene. Updating Unity didn't solve the problem.

 

Hi there!

I've watched your video and followed each step, but for some reason the shot goes to the right and up of the player... I've gone through the code a few more times but can't seem to find whats wrong Any suggestions?

 

I don't want the line Rendered (like in the video) in my game. What should i do

 

OSX El Capitan, Unity 5.5, Steam version

Ditto here, I think the completed scene is broken. When I try to fire the gun, nothing happens and I get the error message reported by KDB44, above. Pity, as I was interested in this tutorial. But if it's broken, probably beyond my skills to fix it. Does anyone know of another tutorial about FPS that is not broken?

ANSWER: If the name of the script does not EXACTLY match the name of the class defined in the script -- and this includes case -- then you get this error message. It is not a very helpful error message. "Class name does not match file name" would be more helpful. In the case of this demo, as shipped the name of the class is RaycastShootComplete but the name of the script is RayCastShootComplete. Note the C in "cast" is lower case in the class name and upper case in the script name. I changed the class name so this letter is upper case. Now Unity is happy about associating the script with the Gun object, but the gun still does not fire properly so we are not done yet.

I do get the firing sound effect, kind of a phaser noise, but an error is displayed at bottom of UI, "the variable gunEnd of RayCastShootComplete has not been assigned." Looking in the script I see that it declares a public Transform gunEnd. And sure enough if you look at the Gun object in Inspector, its associated script wants that public variable gunEnd, which is not filled in. Unpacking the object further in Hierarchy, I find that its child ShooterFPSWeapon has a child GunEnd which is a Transform. So at a wild guess (I am just a n00b at Unity but have several decades of coding experience) I drag the GunEnd Transform into the script variable box for gunEnd and it is accepted.

I can now fire the gun and hit the purple cubes, knocking them off their stands.

NOTE to UNITY staff: kind of a booboo, folks, to package up a tutorial (aimed at beginners!) with missing parts, typos, incomplete configurations. I know it's a real challenge to produce perfect releases, but OTOH it's worth extra effort. 'Cos it's bad PR for the app if the beginner tutorials require adventurous hacking just to get them into a usable state. It's particularly essential to test a tutorial release before it gets posted for download. I was able to find my way through this broken package only because of long hacking experience plus the good fortune that the breakage was fairly simple. If it had been a more sophisticated error I would have given up, and would not now be able to learn about fps physics in Unity.

Advanced tutorials, now those might be deliberately released with bugs "as an exercise for the reader". But the beginner level ones really ought to work exactly as the video/article says they should, otherwise n00bies tend to panic.

 

Hi, I'm wondering where "Let's Try Projectiles" assets/video are?

Reason why I'm asking is because it's used in the tutorial "Ability System with Scriptable Objects" (https://unity3d.com/learn/tutorials/topics/scripting/ability-system-scriptable-objects), where it is mentioned to be "released soon".

Anyone know where it is?

 

hey, sorry, this one got delayed and I don't have a date for when it will be out, the script is written and ready to be recorded. I'll post the link here when it's ready.

 

No worries, I thought it had been removed. Thanks for all the tutorials so far and have a nice weekend!

 

Hey! I keep shooting myself as lucodome said, I tried the solution of changing the player layer. It works fine, but if I want to make a game where I need to shoot another player how do I get it to work given that his layer will have to be "IgnoreRayCast" too?

 

Hey. I had a problem with the visualization of the line. Firstly, I have a newer version and because of this the component editor looks different, and secondly the line appears in the middle of the room. Help please adjust it in a new editor. Sorry for the grammar, I use Google Translate))
http://prntscr.com/fd1ary

 

There are a few ways to deal with this, you could try adjusting the player collider shape or position, or you could make sure that the raycast cannot hit this player's layer. If you wanted multiple players you would need to use multiple layers and a layer mask specifying which layer which player could shoot.

 

I fixed it creating a new layer (layer number 9 called ignoreMyRaycast). I changed the script a bit. leave every line as it is but add this two lines under Raycast hit:

int layerMask = 1 << 9;

layerMask = ~layerMask;

and change the if statement condition with this one.

if (Physics.Raycast(rayOrigin,fpsCam.transform.forward,out hit,weaponRange,layerMask)){
...
}

that should make your raycasts register collisiones in every layer except layer 9.

 

Very good tutorial. I like just doing the barebones of a single concept. The only thing I didn't understand is how the red dot gets tied to the raycast hit? Nowhere in the tutorial do we associate the image with anything so you lost me there.

 

same thing...

 

I would like to Instantiate my bullet to the center of the screen, i'm using TPS camera, help please.
I'm becoming crazy with this.

 

Why are Unity tutorials so bad and scattered? They do not feel like doing the things?

 

I have azerty keyboard and so I would like to change game controls from wasd to zqsd... Help please !

Edit:

Also have some problems with my teleportation system:

transform.position = new Vector3(0, -10, -45);

When I put another command like that:

transform.position = new Vector3(0, -10, -45);
lifepoint = lifepoint + 1000 // HERE

The second one works, so there is probable a problem with the line af code...
Excuse me if it's obvious, I'm new to unity...
And also excuse me for my english I'm french...

 

Just had a look at your ''Let's Try Game Dev: Shooting via Raycasting'' excellent video I just wonder if this would eork on s Spherical surface and if you would have to add the planets gravity to the bullet/lazer e.t.c for it to be accurate if the game is on a sphere?

 

Hello. I'm doing the Breakout tutorial and have an error in the paddle script (unexpected symbol: xPos at 15, 37).

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Paddle : MonoBehaviour {
6.  
7.     public float paddleSpeed = 1f;
8.  
9.     private Vector3 playerPos = new Vector3(0, -9.5f, 0);
10.  
11.     // Update is called once per frame
12.     void Update () {
13.  
14.     float xPos = transform.position.x + (Input.GetAxis("Horizontal") * paddleSpeed);
15. playerPos = new Vector3 (Mathf.Clamp xPos, -8f, 8f), -9.5f, 0f);
16.         transform.position = playerPos;
17.     }
18. }

It's probably a simple error on my part. Any help is appreciated!
It was a simple error- a missing (

 

I'm getting the debug message

NullReferenceException: Object reference not set to an instance of an object

for

Code (CSharp):

1. Vector3 rayOrigin = FirstPersonCharacter.ViewportToWorldPoint (new Vector3 (.5f, .5f, 0));

 

How to change the color of the laser ???

 

I am also keen to go thru the PROJECTILES tutorial that was supposed to follow this one...?

As it seemed like a nice progression on the way to the the ABILITY SYSTEMS WITH SCRIPTABLE OBJECTS tutorial.

Shall try to just skip ahead for now using the Completed Project code...