I am working on a 2.5D platforming game on Unity3D and I need my character to slide on tagged objects rather than being over the slope limit. I am using the character motor and FPS input scripts. I have found the line that enables the slide and it is as follows:
function TooSteep () {
return (groundNormal.y <= Mathf.Cos(controller.slopeLimit * Mathf.Deg2Rad));
}
This condition is clearly for over the slope limit, how would I be able to edit this function to return true if the game object the character is on is tagged by "Slide" for example.
Any help is appreciated thank you very much.
First, add a new boolean field to the charactermotor script and throw in an "or" in the if statement that checks if the player is grounded and if the ground is too steep, so it looks like this:
if(grounded && (TooSteep() || someNewBool))
Then, attach a trigger box collider to the object (don't bother with tags on the other object), and attach a monobehaviour with the following function in it:
function OnTriggerEnter(other:Collider)
{
if(other.tag.Equals("Player"))//Replace "Player" with the tag you marked the player with.
{
other.GetComponent(CharacterMotor).someNewBool = true;// The new bool you added to the charactermotor script
}
}
and another function that looks like this:
function OnTriggerExit(other:Collider)
{
if(other.tag.Equals("Player"))
{
other.GetComponent(CharacterMotor).someNewBool = false;
}
}
Related
Basically on my map I'm trying to use Physics.CheckBox detect when the player is in certain areas to determine where my enemies will spawn at. I am using a layer mask to detect when its colliding with the player and Gizmos to visualize this box in the editor. The issue I'm having is that it will return true even when the player isn't inside the box. I have verified every single other game item does not have the player layer mask causing it to return true when it hits something else. The kicker is Physics.CheckSphere works perfectly except for the fact that my map is square, not circle, so I can't use check sphere because I can't cover all of the areas I need to cover.
Code for both is as follows, note that both of these lines are not in my script at the same time I alternated them out for testing:
atNeighborhood = Physics.CheckSphere(spawnAreas[0].transform.position, neighborhoodRange, playerLayer);
atNeighborhood = Physics.CheckBox(spawnAreas[0].transform.position, neighborhoodRange, Quaternion.identity, playerLayer);
Why would the CheckBox return true when colliding with items not in the layer mask but the CheckSpere works perfectly and only returns true when colliding with the player? Anyone have any idea?
LET ME KNOW IF THERE ARE ANY PROBLEMS OR ERRORS IN COMMENTS. THANKS!
Ok. CheckBox can get kind of confusing sometimes. I would reccomend something else.
You could use Empty Game Objects with colliders on them and put them where ever you want. IsTrigger must be set to true. Imagine these as "zones", where whenever you step in one, something can happen.
All you have to do is set a certain tag to each zone to activate different things.
Note: Player does not need rigidbody, but it would be a whole lot less messy if you did.
Here is a script if your player does have a rigidbody (put this script on your player):
void OnTriggerEnter(Collider obj)
{
if (obj.gameObject.CompareTag("Zone 1"))
{
SpawnZombies();
}
}
Player doesn't have rigidbody:
If your player does not have a rigidbody, you could put a bunch a script on each one called "zone activator".
Important Notes for this version:
Your player must have a collider and a unique tag.
On each zone add a rigidbody.
Make sure detectCollisions is false!
Make sure useGravity is false!
This zone detector should have it's collider be a trigger;
(You do not want this thing to move!)
You can now create a script that goes on each zone:
public string message;
public bool inZone;
void OnTriggerEnter(Collider obj)
{
if (obj.gameObject.CompareTag("player"))
//Or set it to whatever tag the player has
{
inZone = true;
}
}
void OnTriggerExit(Collider obj)
{
if (obj.gameObject.CompareTag("player"))
//Or set it to whatever tag the player has
{
inZone = false;
}
}
You must then reference this in the player's script
public ZoneDetector[] allZones;
void Update()
{
//.....
foreach (ZoneDetector zone in allZones)
{
if (zone.inZone == true)
{
if (zone.message == "zone 1")
{
DoZone1();
}
if (zone.message == "zone 2")
{
DoZone2();
}
}
}
}
I'm coding a top down game, with point and click movement. Currently you are able to click on the map, but you can also click outside the map to move there. I added colliders to the walls, but you still try and go outside. Code example:
if (Input.GetMouseButtonDown(1)) {'move'}
But what I want is something like this:
if (Input.GetMouseButtonDown(1) on MAP) //map is the object
So I want to be able to only click on the map, and if you click outside the map, it won't do anything. Thanks!
My script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerMovement : MonoBehaviour
{
public float speed = 10f;
Vector2 lastClickedPos;
//Rect inRect = new Rect(82.80f, -83.20f, 164.90f, 163.29f);
bool moving;
private void Update()
{
if (Input.GetMouseButtonDown(1) && GameObject.CompareTag("clickedOn")){ // && inRect.Contains(Input.mousePosition)
lastClickedPos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
moving = true;
}
if (moving && (Vector2)transform.position != lastClickedPos)
{
float step = speed * Time.deltaTime;
transform.position = Vector2.MoveTowards(transform.position, lastClickedPos, step);
}
else
{
moving = false;
}
}
}
I think you can resolve your issue using tags or layers. I'll just list how to setup tags since it has a lot less setup vs. doing layers.
First off you'll need to create a tag and since Unity has good documentation on stuff like this I'll just link it here: https://docs.unity3d.com/Manual/Tags.html
Once you created your tag and tagged the ground/environment/area you want to have be clickable with the tag then you just need to find the object you want to collided with and use CompareTag so to put that in an example here is what your if statement could look like:
if (Input.GetMouseButtonDown(1) && collidedObject.CompareTag("TagNameGoesHere"))
{
//Movement goes here
}
Just to note I've named the gameObject that was found to collidedObject but you can name it whatever you want.
Hopefully this helps, let me know if I need to clarify something, it has been awhile since I've done a stackoverflow answer so I may have left something out.
Edit: Alright so adding onto this, you'll need to also look into how to do raycasting to check what object you click on so you can determine if it's a spot you can move to.
I've just tested this in a project just to make sure I understand it (I've used raycast a lot but never really done point to click movement before).
Essentially I've broken down things into 3 statements, which you can add together into one if statement but it's more so I can explain everything in detail:
if (Input.GetMouseButtonDown(1))
What you use currently, we want to make sure we only do the next few checks when we click
if (Physics.Raycast(playerCamera.ScreenPointToRay(Input.mousePosition), out hit, Mathf.Infinity))
So this here, is essentially drawing a line from a position, in this bit we are using the player camera which is just a regular camera reference and converting a point on screen into a ray which we then set the length to be Mathf.Infinity (this can be whatever float, I've just used this for an example) and then we output the hit object to hit which is a RaycastHit struct.
if (hit.collider != null && hit.collider.CompareTag("TagNameGoesHere"))
Now we finally check to see if the collider is not null (in case we hit the sky or something, which shouldn't happen for you in a top down game) and also that the object has right tag. Again you need to setup the tags which I've listed above and make sure you set the correct game objects in scene to have the correct tag. After which you should be able to move to the position (using the position you've setup and such is fine)
So it should look something like this:
if (Input.GetMouseButtonDown(1))
{
if (Physics.Raycast(playerCamera.ScreenPointToRay(Input.mousePosition), out rayCastHit, Mathf.Infinity))
{
if (hit.collider != null && hit.collider.CompareTag("TagNameGoesHere"))
{
//Movement goes here
}
}
}
Make sure to also put a reference to the camera and RayCastHit objects (these are the playerCamera and rayCastHit variables in the above). For my example script that I created I made them global variables.
I've been trying to get a script working to check if my player is below a certain Y lvl, for a platformer. so it can be respawned to the beginning, But how do I put the y lvl inside a variable to check it? i cant figure it out lol
In the Update() run something like:
if(player.transform.position.y < 1)
{
//do something
}
where 'player' is the GameObject in question.
I am assuming you want to just want to compare (==, <=, >=, all that jazz is what I mean by comparing just in case you were not aware) the Y value to something like 10 for example. This is easy and you don't even need a variable necessarily for this.
//For the object position relative to the world
if(transform.position.y == 10) //"transform" gives you acces to the transform component
{ //of the object the script is attached to
Debug.Log("MILK GANG");
}
//For the object position relative to its Parent Object
if(transform.localPosition.y == 10)
{
Debug.Log("MILK GANG");
}
If you want to change the value of the position of your object then
transform.position = new Vector2(6, 9)//Nice
//BTW new Vector2 can be used if you dont
//want to assign a completely new variable
However, if you want to get a reference (Basically a variable that tells the code your talking about this component) to it.
private Transform Trans;
void Awake() //Awake is called/being executed before the first frame so its
{ //better than void Start in this case
Trans = GetComponent<Transform>();
Trans.position = new Vector2(69, 420); //Nice
}
This is the code way of doing it but there's another way that uses Unity
[SerializeField] private Transform Trans;
//[SerializeField] makes the variable changeable in Unity even if it is private so you
//can just drag and drop on to this and you good to go
Hope this help
if it doesn't
then welp I tried lel
You can use a script added to gameobject to check transform.position of the object.
if(transform.position.y < ylvl)
{
//do something
}
where ylvl is the integer of the height you want to check
I am struggling to find a good tutorial or informations that would allow me to select multiple objects in 3D in a user friendly manner.
So far, the best tutorial I found is this one : https://sharpcoderblog.com/blog/unity-3d-rts-style-unit-selection. The tutorial works by using the transform.position of the selectable objects and checking if it within the user's selection.
What I wish is to have the user be able to select a unit even if it is only partially within the user's selection such as most RTS games do ( both in 2D and 3D ).
One possibility would be to create a temporary mesh using the camera's clipping distances and the user's selection and then check for collisions but I was not able to find any tutorials using this method nor do I know if it is the best approach to the subject.
If I understand correctly you want to
somehow start a selection
collect every object that was "hit" during the collection
somehow end the collection
Couldn't you simply use raycasting? I will assume simple mouse input for now but you could basically port this to whatever input you have.
// Just a little helper class for an event in the Inspector you can add listeners to
[SerializeField]
public class SelectionEvent : UnityEvent<HashSet<GameObject>> { }
public class SelectionController : MonoBehaviour
{
// Adjust via the Inspector and select layers that shall be selectable
[SerializeField] private LayerMask includeLayers;
// Add your custom callbacks here either via code or the Inspector
public SelectionEvent OnSelectionChanged;
// Collects the current selection
private HashSet<GameObject> selection = new HashSet<GameObject>();
// Stores the current Coroutine controlling he selection process
private Coroutine selectionRoutine;
// If possible already reference via the Inspector
[SerializeField] private Camera _mainCamera;
// Otherwise get it once on runtime
private void Awake ()
{
if(!_mainCamera) _mainCamera = Camera.main;
}
// Depending on how exactly you want to start and stop the selection
private void Update()
{
if(Input.GetMouseButtonDown(0))
{
StartSelection();
}
if(Input.GetMouseButtonUp(0))
{
EndSelection();
}
}
public void StartSelection()
{
// if there is already a selection running you don't wanr to start another one
if(selectionRoutine != null) return;
selectionRoutine = StartCoroutine (SelectionRoutine ());
}
public void EndSelection()
{
// If there is no selection running then you can't end one
if(selectionRoutine == null) return;
StopCoroutine (selectionRoutine);
selectionRoutine = null;
// Inform all listeners about the new selection
OnSelectionChanged.Invoke(new HashSet<GameObject>(selection);
}
private IEnumerator SelectionRoutine()
{
// Start with an empty selection
selection.Clear();
// This is ok in a Coroutine as long as you yield somewhere within it
while(true)
{
// Get the ray shooting forward from the camera at the mouse position
// for other inputs simply replace this according to your needs
var ray = _mainCamera.ScreenPointToRay(Input.mousePosition);
// Check if you hit any object
if(Physics.Raycast(ray, out var hit, layerMask = includeLayers ))
{
// If so Add it once to your selection
if(!selection.Contains(hit.gameObject)) selection.Add(hit.gameObject);
}
// IMPORTANT: Tells Unity to "pause" here, render this frame
// and continue from here in the next frame
// (without this your app would freeze in an endless loop!)
yield return null;
}
}
}
Ofcourse you could do it directly in Update in this example but I wanted to provide it in a way where you can easily exchange the input method according to your needs ;)
From UX side you additionally might want to call a second event like OnSelectionPreviewUpdate or something like this every time you add a new object to the selection in order to be able to e.g. visualize the selection outcome.
I might have understood this wrong and it sounds like you rather wanted to get everything inside of a drawn shape.
This is slightly more complex but here would be my idea for that:
Have a dummy selection Rigidbody object that by default is disabled and does nothing
don't even have a renderer on it but a mesh filter and mesh collider
while you "draw" create a mesh based on the input
then use Rigidbody.SweepTestAll in order to check if you hit anything with it
Typed on smartphone but I hope the idea gets clear
I think I would try to create a PolygonCollider2D because it is quite simple comparing to creating a mesh. You can set its path (outline) by giving it 2D points like location of your pointer/mouse. Use the SetPath method for it. You can then use one of its methods to check if another point in space overlaps with that collider shape.
While the PolygonCollider2D interacts with 2D components you can still use its Collider2D.OverlapPoint method to check positions/bounds of your 3D objects after translating it to 2D space.
You can also use its CreateMesh method to create a mesh for drawing your selection area on the screen.
You can read more about the PolygonCollider2D here.
Hope it makes sens and hope it helps.
I've been sort of teaching myself and sort of learning from Jimmy Vegas on youtube: https://www.youtube.com/channel/UCRMXHQ2rJ9_0CHS7mhL7erg
If you haven't seen those tutorials or don't want to look, one of the things he does is create a small script that destroys a coin when the player collider hits it, but mine isn't working. Code below (a little mis-formatted, sorry, couldn't get it to format correctly):
function OnCollisionEnter (collision : Collision) {
if(collision.gameObject.tag == "coinCollect") {
Destroy(this.gameObject);
}
}
I applied the script to a prefab and placed a bunch of coins around a little area, additionally, I made a capsule collider in a first person controller tagged "coinCollect", and ticked "Is Trigger"
Also, I'm trying to make a teleporter that teleports the first person character from one teleporter to another. Code below:
var warptarget001 : GameObject;
var warptarget002 : GameObject;
function OnTriggerEnter (col : Collider) {
if (col.gameObject.tag == "warp001") {
this.transform.position = warptarget002.position;
} else if (col.gameObject.tag == "warp002") {
this.transform.position = warptarget001.position;
}
}
I have four objects here, two warp pads and two warp targets. The two warp pads are tagged "warp001" and "warp002", respectively and the two warp targets are not assigned anything in the code, but assigned by dragging and dropping an empty object into the Serialized Field the script provides. Both pads have capsule colliders with "Is Trigger" unticked but it doesn't work either way, ticked or unticked.
Can anyone tell me what I might be doing wrong? Thank you.
The script was all correct, my problem was that my parent "FPSController" object didn't have a Rigidbody applied to it and should be the only object (as opposed to the "FirstPersonCharacter" object I had nested inside of it) that the scripts are applied to. That seemed to fix the problem.
The correct code is:
/* coincollect.cs */
using UnityEngine;
using System.Collections;
using UnityEngine.UI;
public class coincollect : MonoBehaviour {
private int _score;
[SerializeField]
private Text _text;
void OnTriggerEnter ( Collider collision ){
if(collision.gameObject.tag == "coin"){
Destroy(collision.gameObject);
_score++;
_text.text = "Score: " + _score;
}
}
}
and:
/* warp.js */
var warptarget001 : GameObject;
var warptarget002 : GameObject;
function OnTriggerEnter (col : Collider) {
if (col.gameObject.tag == "warp001") {
this.transform.position = warptarget002.transform.position;
}
if (col.gameObject.tag == "warp002") {
this.transform.position = warptarget001.transform.position;
}
}
The only thing I can think of for your first problem is that it shouldn't need IsTrigger ticked. Other than that, it sounds like it should work (unless I'm missing something).
For the second problem you're having (with the warps), I don't think you can use warptarget001 by dragging and dropping objects into the fields. The reason being that what you've dragged into that field isn't the same object instance that's inworld.
You should assign their values through the code (preferably in the Start method), by using GameObject.Find("name") for example. This way, warptarget001 corresponds to the inworld gameobject.