Hi everyone,
I know this is the 2D area but I couldn’t find a 3D area to post this in. I’m trying to get the next level to load when the player collides with a cube. I’ve tried a solution on this site from 2015 and it didn’t work. Here is the code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
public class DetectCollision : MonoBehaviour {
// Use this for initialization
void Start () {
}
void OnCollisionEnter(Collision coll)
{
print("in collision method");
string tag = coll.collider.gameObject.tag;
print(tag);
if(tag == "level01_exit")
{
SceneManager.LoadScene("Level02");
}
}
// Update is called once per frame
void Update () {
}
}
This code is attached to an FPS player. I’ve checked all of the spelling/casing of the names of the tags, both scenes are included in the build settings, I’ve tried adding different colliders and none of this has worked. As you can see from the above code, I added print statements to see if the computer is going into the method. With every attempt, it never prints these messages. That indicates to me that it’s not going into the method. What it doesn’t indicate is why it’s not.
Thanks.
have the player and cube both collider (3d) and at least one of them has rigidbody (3d) ? And the colliders are not setted to trigger ? If the cube is trigger, then use void OnTriggerEnter(Collider coll) )
Both have colliders and the player has a rigidbody attached. None of the colliders are set as triggers.
Last chance, do you have added this script to the player ? 
Or different layer (and the collision matrix for them is disabled)
Sorry, I don’t know what can it be now, I have tested your script on 2 cubes and it works. I can see the executing of this line: print(tag);
Try it with the cube as trigger and void OnTriggerEnter(Collider coll). Maybe something prevent the collision.
1 Like
I have added the script to the player. Where would l check the collision matrix at?
edit->project settings->physics and then right side ->Layer collisions matrix
still I don’t think it has something to do with it
the output for print is the console window, checked it ?
Yes, I even had it displayed while trying it.
maybe will it work wenn the script is added to the cube
if(gameObject.tag == "level01_exit" && coll.gameObject.tag == "Player")
{
SceneManager.LoadScene("Level02");
}
I tried all of the suggestions you made, it still isn’t working. I even created a new project and tried it in there and it didn’t work. 
I do appreciate the suggestions though! By the way I’m (obviously) learning unity and I’m learning German.
make the package from the new project and upload it here, I will check it then. Assets ->Export Package
Ok, so I got it to switch levels, but the side to side movement is jerky and if I stop moving, the character will continue to move in a forward, downward diagonal direction right through the floor. I tried uploading the file here, but it said it’s too big.
Here is what I think the moving script is (it’s part of the FPS controller standard asset):
using System;
using UnityEngine;
using UnityStandardAssets.CrossPlatformInput;
using UnityStandardAssets.Utility;
using Random = UnityEngine.Random;
namespace UnityStandardAssets.Characters.FirstPerson
{
[RequireComponent(typeof (CharacterController))]
[RequireComponent(typeof (AudioSource))]
public class FirstPersonController : MonoBehaviour
{
[SerializeField] private bool m_IsWalking;
[SerializeField] private float m_WalkSpeed;
[SerializeField] private float m_RunSpeed;
[SerializeField] [Range(0f, 1f)] private float m_RunstepLenghten;
[SerializeField] private float m_JumpSpeed;
[SerializeField] private float m_StickToGroundForce;
[SerializeField] private float m_GravityMultiplier;
[SerializeField] private MouseLook m_MouseLook;
[SerializeField] private bool m_UseFovKick;
[SerializeField] private FOVKick m_FovKick = new FOVKick();
[SerializeField] private bool m_UseHeadBob;
[SerializeField] private CurveControlledBob m_HeadBob = new CurveControlledBob();
[SerializeField] private LerpControlledBob m_JumpBob = new LerpControlledBob();
[SerializeField] private float m_StepInterval;
[SerializeField] private AudioClip[] m_FootstepSounds; // an array of footstep sounds that will be randomly selected from.
[SerializeField] private AudioClip m_JumpSound; // the sound played when character leaves the ground.
[SerializeField] private AudioClip m_LandSound; // the sound played when character touches back on ground.
private Camera m_Camera;
private bool m_Jump;
private float m_YRotation;
private Vector2 m_Input;
private Vector3 m_MoveDir = Vector3.zero;
private CharacterController m_CharacterController;
private CollisionFlags m_CollisionFlags;
private bool m_PreviouslyGrounded;
private Vector3 m_OriginalCameraPosition;
private float m_StepCycle;
private float m_NextStep;
private bool m_Jumping;
private AudioSource m_AudioSource;
// Use this for initialization
private void Start()
{
m_CharacterController = GetComponent<CharacterController>();
m_Camera = Camera.main;
m_OriginalCameraPosition = m_Camera.transform.localPosition;
m_FovKick.Setup(m_Camera);
m_HeadBob.Setup(m_Camera, m_StepInterval);
m_StepCycle = 0f;
m_NextStep = m_StepCycle/2f;
m_Jumping = false;
m_AudioSource = GetComponent<AudioSource>();
m_MouseLook.Init(transform , m_Camera.transform);
}
// Update is called once per frame
private void Update()
{
RotateView();
// the jump state needs to read here to make sure it is not missed
if (!m_Jump)
{
m_Jump = CrossPlatformInputManager.GetButtonDown("Jump");
}
if (!m_PreviouslyGrounded && m_CharacterController.isGrounded)
{
StartCoroutine(m_JumpBob.DoBobCycle());
PlayLandingSound();
m_MoveDir.y = 0f;
m_Jumping = false;
}
if (!m_CharacterController.isGrounded && !m_Jumping && m_PreviouslyGrounded)
{
m_MoveDir.y = 0f;
}
m_PreviouslyGrounded = m_CharacterController.isGrounded;
}
private void PlayLandingSound()
{
m_AudioSource.clip = m_LandSound;
m_AudioSource.Play();
m_NextStep = m_StepCycle + .5f;
}
private void FixedUpdate()
{
float speed;
GetInput(out speed);
// always move along the camera forward as it is the direction that it being aimed at
Vector3 desiredMove = transform.forward*m_Input.y + transform.right*m_Input.x;
// get a normal for the surface that is being touched to move along it
RaycastHit hitInfo;
Physics.SphereCast(transform.position, m_CharacterController.radius, Vector3.down, out hitInfo,
m_CharacterController.height/2f, Physics.AllLayers, QueryTriggerInteraction.Ignore);
desiredMove = Vector3.ProjectOnPlane(desiredMove, hitInfo.normal).normalized;
m_MoveDir.x = desiredMove.x*speed;
m_MoveDir.z = desiredMove.z*speed;
if (m_CharacterController.isGrounded)
{
m_MoveDir.y = -m_StickToGroundForce;
if (m_Jump)
{
m_MoveDir.y = m_JumpSpeed;
PlayJumpSound();
m_Jump = false;
m_Jumping = true;
}
}
else
{
m_MoveDir += Physics.gravity*m_GravityMultiplier*Time.fixedDeltaTime;
}
m_CollisionFlags = m_CharacterController.Move(m_MoveDir*Time.fixedDeltaTime);
ProgressStepCycle(speed);
UpdateCameraPosition(speed);
m_MouseLook.UpdateCursorLock();
}
private void PlayJumpSound()
{
m_AudioSource.clip = m_JumpSound;
m_AudioSource.Play();
}
private void ProgressStepCycle(float speed)
{
if (m_CharacterController.velocity.sqrMagnitude > 0 && (m_Input.x != 0 || m_Input.y != 0))
{
m_StepCycle += (m_CharacterController.velocity.magnitude + (speed*(m_IsWalking ? 1f : m_RunstepLenghten)))*
Time.fixedDeltaTime;
}
if (!(m_StepCycle > m_NextStep))
{
return;
}
m_NextStep = m_StepCycle + m_StepInterval;
PlayFootStepAudio();
}
private void PlayFootStepAudio()
{
if (!m_CharacterController.isGrounded)
{
return;
}
// pick & play a random footstep sound from the array,
// excluding sound at index 0
int n = Random.Range(1, m_FootstepSounds.Length);
m_AudioSource.clip = m_FootstepSounds[n];
m_AudioSource.PlayOneShot(m_AudioSource.clip);
// move picked sound to index 0 so it's not picked next time
m_FootstepSounds[n] = m_FootstepSounds[0];
m_FootstepSounds[0] = m_AudioSource.clip;
}
private void UpdateCameraPosition(float speed)
{
Vector3 newCameraPosition;
if (!m_UseHeadBob)
{
return;
}
if (m_CharacterController.velocity.magnitude > 0 && m_CharacterController.isGrounded)
{
m_Camera.transform.localPosition =
m_HeadBob.DoHeadBob(m_CharacterController.velocity.magnitude +
(speed*(m_IsWalking ? 1f : m_RunstepLenghten)));
newCameraPosition = m_Camera.transform.localPosition;
newCameraPosition.y = m_Camera.transform.localPosition.y - m_JumpBob.Offset();
}
else
{
newCameraPosition = m_Camera.transform.localPosition;
newCameraPosition.y = m_OriginalCameraPosition.y - m_JumpBob.Offset();
}
m_Camera.transform.localPosition = newCameraPosition;
}
private void GetInput(out float speed)
{
// Read input
float horizontal = CrossPlatformInputManager.GetAxis("Horizontal");
float vertical = CrossPlatformInputManager.GetAxis("Vertical");
bool waswalking = m_IsWalking;
#if !MOBILE_INPUT
// On standalone builds, walk/run speed is modified by a key press.
// keep track of whether or not the character is walking or running
m_IsWalking = !Input.GetKey(KeyCode.LeftShift);
#endif
// set the desired speed to be walking or running
speed = m_IsWalking ? m_WalkSpeed : m_RunSpeed;
m_Input = new Vector2(horizontal, vertical);
// normalize input if it exceeds 1 in combined length:
if (m_Input.sqrMagnitude > 1)
{
m_Input.Normalize();
}
// handle speed change to give an fov kick
// only if the player is going to a run, is running and the fovkick is to be used
if (m_IsWalking != waswalking && m_UseFovKick && m_CharacterController.velocity.sqrMagnitude > 0)
{
StopAllCoroutines();
StartCoroutine(!m_IsWalking ? m_FovKick.FOVKickUp() : m_FovKick.FOVKickDown());
}
}
private void RotateView()
{
m_MouseLook.LookRotation (transform, m_Camera.transform);
}
private void OnControllerColliderHit(ControllerColliderHit hit)
{
Rigidbody body = hit.collider.attachedRigidbody;
//dont move the rigidbody if the character is on top of it
if (m_CollisionFlags == CollisionFlags.Below)
{
return;
}
if (body == null || body.isKinematic)
{
return;
}
body.AddForceAtPosition(m_CharacterController.velocity*0.1f, hit.point, ForceMode.Impulse);
}
}
}
sorry i have thought you have used your own script for moving. I don’t think it can be much wrong in Unity scripts besides the settings 
Which one prefab did you have used ? If I am not wrong there are two prefabs one with the kinematic rigidbody and one with the dynamic. Can it be that you have used controller with the kinematic rigidbody, this controller was not working with OnCollisionEnter event, you have switched it to dynamic and now the moving is broken ? In this case try RigidbodyFPSController
You need your script attached to your trigger. Your trigger cube MUST be marked as isTrigger.
OnTriggerEnter(Collider other)
{
if(other.tag=="Player"){
SceneManager.LoadScene(2);
}
}
You also must have the SceneManager namespace imported into your script. So make sure it is in your script
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
Or the load level will not work.
That’s what she said.
Anyway, you started a new scene, so make sure that your old scene settings are active in the new scene. You may have orthographic camera when your old camera has perspective, or you may have dabbled with certain gizmos, etc…
