I've created a movement script that checks to see if an object is grounded, and if so, moves the object based on user input. When I attach it to an object I create in Unity, it works. When I attach it to an object I created in Blender and then imported, nothing. No errors, the object just fails to respond. I can't figure out what is causing the imported object to not respond to input. Both objects have a rigidbody and a collider.
This is the code for movement:
using UnityEngine;
using System.Collections;
public class PlayerMovement : MonoBehaviour {
public float speed = 10f;
public float rotationSpeed = 100f;
private float distToGround;
private Collider collider;
void Start() {
collider = GetComponent<Collider>();
distToGround = collider.bounds.extents.y;
}
void Update() {
MovePlayer();
}
void MovePlayer() {
float translation = Input.GetAxis("Vertical");
float rotation = Input.GetAxis("Horizontal");
if (translation != null && rotation != null) {
if (IsGrounded()) {
transform.Translate(0, 0, translation * speed * Time.deltaTime);
transform.Rotate(0, rotation * rotationSpeed * Time.deltaTime, 0);
}
}
}
bool IsGrounded() {
return Physics.Raycast(transform.position, -Vector3.up, distToGround + 0.1f);
}
}
I've made a video demonstrating this: https://www.youtube.com/watch?v=qatBF5Ov3Zo&feature=youtu.be
This is a complication caused by Blender left handed axis vs Unity's right handed axis. When I exported a rotated object from Blender, the script works on the object as expected. The solution is to make sure that the object you are exporting is facing the Z axis instead of the native Y axis.
Related
I'm attempting to make the ability to slide in an FPS game I'm working on and I've tried rotating the player object but when tested, it does nothing. Pressing the slide key I have assigned does nothing but rotate the player object in the Y and Z axis (I'm trying to rotate it on the X axis)
Here's the code I'm using (only relevant parts have been kept in):
public class SlideMovementScript : MonoBehaviour
{
public Rigidbody rig;
public CapsuleCollider capcol;
public GameObject player;
public float originalHeight;
public float reducedHeight;
public float slideSpeed = 10f;
// Start is called before the first frame update
void Start()
{
capcol = GetComponent<CapsuleCollider>();
rig = GetComponent<Rigidbody>();
originalHeight = capcol.height;
}
// Update is called once per frame
void Update()
{
if (Input.GetKeyDown(KeyCode.LeftControl) && Input.GetKey(KeyCode.W))
Sliding();
else if (Input.GetKeyUp(KeyCode.LeftControl))
GoUp();
}
private void Sliding()
{
capcol.height = reducedHeight;
player.transform.localRotation = Quaternion.Euler(1.599f, 0f, 0f);
rig.AddForce(transform.forward * slideSpeed, ForceMode.VelocityChange);
}
private void GoUp()
{
GetComponent<CapsuleCollider>().height = originalHeight;
player.transform.localRotation = Quaternion.Euler(0f, 0f, 0f);
}
}
I've gotten ZERO error messages from this but I haven't managed to find the problem
Another problem I've also had is when you start sliding, it just instantly rotates the Player object to X 1.599 Y 0 Z 0. I want it to rotate to where the player is facing but I haven't found a way to do it, even using transform.foward or other references won't work.
The Explanation (skip to script if you want) (read notes)
I reccomend using Quaternion's methods. You can use Quaternion.Slerp which can smooth out the rotation towards the player.
Slerp means spherical linear interpolation
Basically, Slerp is a 3 argumented method. the first argument is the current rotation, the second argument is the target rotation, and the third is at which point between those two you want to output.
More simply, Lerp is linear interpolation. Lerps arguments are the same, except it handles floats and not Quaternions. If you Mathf.Lerp(0,1,1); you will get 1, because 1 is all the ay to the second argument. If you do Mathf(0, 3, 0.5); you will get 1.5 because 1.5 is halfway (0.5) between them both.
You can imagine slerp like that, if you give rotation (90, 0, 0) and alerp it to (0, 0, 0) by 0.5 you will get (45, 0, 0).
On this example, I slerp from the current rotation, to the target rotation, by delta time. This way, as time goes on, it slightly increases the current rotation to be the target.
I can create the target as 1.599 rotated on the x.
To make this relative Make a parent game object to the player containing the mesh and rigidbody and maybe the collider (depends if you want the collider upright). I will call this "slidePlayer" slidePlayer must be a child of the player gameObject
Notes
Make sure to have slidePlayer to a gameObject that is a child of player, but must have the player mesh or sliding won't be visible.
Change rot to the target rotation.
Change speed to speed to rotate to the target rotation.
Here is your script I changed:
public class SlideMovementScript : MonoBehaviour
{
public Rigidbody rig;
public CapsuleCollider capcol;
public GameObject player;
public GameObject slidePlayer;
public float originalHeight;
public float reducedHeight;
public float slideSpeed = 10f;
// Start is called before the first frame update
void Start()
{
capcol = GetComponent<CapsuleCollider>();
rig = GetComponent<Rigidbody>();
originalHeight = capcol.height;
}
// Update is called once per frame
void Update()
{
if (Input.GetKeyDown(KeyCode.LeftControl) && Input.GetKey(KeyCode.W))
Sliding();
else if (Input.GetKeyUp(KeyCode.LeftControl))
GoUp();
}
private void Sliding()
{
capcol.height = reducedHeight;
Quaternion rot = Quaternion.Euler(1.599f, 0f, 0f);
float speed = 1f;
Quaternion curRot = slidePlayer.transform.localRotation;
slidePlayer.transform.localRotation = Quaternion.Slerp(curRot, rot, Time.deltaTime * speed);
rig.AddForce(transform.forward * slideSpeed, ForceMode.VelocityChange);
}
private void GoUp()
{
GetComponent<CapsuleCollider>().height = originalHeight;
Quaternion rot = Quaternion.Euler(0f, 0f, 0f);
float speed = 3f;
Quaternion curRot = slidePlayer.transform.localRotation;
slidePlayer.transform.localRotation = Quaternion.Slerp(curRot, rot, Time.deltaTime * speed);
}
}
Let me know if there are any problems in coments. Thanks.
An illustration of my issue/what I'm trying to achieve
I managed to have my player move around the inside surface of a cylinder using gravity but an issue comes up when trying to rotate the camera to look around.
First, there's a script that simulates gravity by pushing the player against the inside walls of the cylinder. This script also keeps the player upright by changing the "up" direction of the player to always be facing the center of the cylinder. I know this keeps my player from looking up so for now I'm just working on getting them to look left and right.
Second, when the player is on the bottom of the cylinder and parallel with the Y-axis I can look left and right without issue because the camera rotates using the x-axis (see circle on the left side of the image). However when the player moves around the side of the cylinder the camera is still trying to rotate based on the X-axis even though they are not aligned resulting in the camera not accurately rotating (see the circle on the right side of the image), and by the time the player is 90deg around the cylinder cannot rotate at all (thanks I think to the gravity keeping the player perpendicular to the sides of the cylinder), and at 180deg around the rotation is inverted.
I assume there are two possible solutions that I have not been able to successfully implement:
ignore the world xyz axis' and rotate relative to the player's xyz.
do some math to figure out the proper angles when you take into account the player's rotation around the cylinder and the angle of the current "left" direction.
The problem with the first solution is I have not been able to successfully rotate the player independent of the world xyz. I tried adding the Space.Self to the Rotate() method but no success. The problem with the second is math scares me and I've managed to avoid Quaternions & Euler angles so far so I'm not even sure how to begin figuring that out.
If anyone has had a similar issue I would greatly appreciate any insight or suggestions on how to figure it out.
Here's my code for controlling the play movement/camera direction and my code for the gravity:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.InputSystem;
public class PlayerController : MonoBehaviour
{
InputManager inputActions;
InputManager.PlayerMovementActions playerMovement;
public GravityAttractor GravityAttractor;
public float moveSpeed = 15;
public float jumpHeight = 10f;
public float sensitivityX = 1f;
public float sensitivityY = 1f;
float mouseX, mouseY;
Vector2 mouseInput;
private bool isJumping = false;
private Vector3 moveDir;
private Vector2 moveInput;
private Rigidbody rbody;
private void Awake()
{
inputActions = new InputManager();
playerMovement = inputActions.PlayerMovement;
playerMovement.Movement.performed += context => moveInput = context.ReadValue<Vector2>();
playerMovement.Jump.performed += ctx => Jump();
//playerMovement.MouseX.performed += context => mouseInput = context.ReadValue<Vector2>();
playerMovement.MouseX.performed += context => mouseInput.x = context.ReadValue<float>();
playerMovement.MouseY.performed += context => mouseInput.y = context.ReadValue<float>();
rbody = GetComponent<Rigidbody>();
isJumping = false;
}
private void Update()
{
moveDir = new Vector3(moveInput.x, 0, moveInput.y).normalized;
if (rbody.velocity.y == 0)
isJumping = false;
}
private void FixedUpdate()
{
rbody.MovePosition(rbody.position + transform.TransformDirection(moveDir) * moveSpeed * Time.deltaTime);
MouseLook(mouseInput);
}
void Jump()
{
//use brackeys method of checking for contact with ground
if(isJumping == false && rbody.velocity.y == 0)
{
isJumping = true;
rbody.velocity = transform.up * jumpHeight;
Debug.Log("player jumped");
}
}
void MouseLook(Vector2 mouseInput)
{
mouseX = mouseInput.x * sensitivityX;
mouseY = mouseInput.y * sensitivityY;
var upTransform = GravityAttractor.transform.position - transform.position;
Vector3 relativeLook = upTransform - transform.forward;
Vector3 qLook = transform.forward - transform.position;
transform.Rotate(transform.up * mouseX * Time.deltaTime, Space.Self);
//transform.Rotate(relativeLook.normalized);
//transform.rotation = Quaternion.LookRotation(qLook);
//transform.Rotate(relativeLook.normalized, mouseX);
}
private void OnEnable()
{
inputActions.Enable();
}
private void OnDisable()
{
inputActions.Enable();
}
}
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class GravityAttractor : MonoBehaviour
{
public float gravityMultiplier = -10f;
private float radius;
public float gravity;
public float distance;
private void Awake()
{
radius = transform.localScale.x/2;
}
public void Attract(Transform body)
{
Vector3 centerOfGravity = new Vector3(transform.position.x, transform.position.y, body.position.z);
distance = Vector3.Distance(centerOfGravity, body.position);
//gravity will match multiplier no matter the radius of cylinder
gravity = gravityMultiplier * (distance/radius);
Vector3 gravityUp = (centerOfGravity - body.position).normalized;
Vector3 bodyUp = body.up;
body.GetComponent<Rigidbody>().AddForce(gravityUp * gravity);
Quaternion targetRotation = Quaternion.FromToRotation(bodyUp, gravityUp) * body.rotation;
body.rotation = Quaternion.Slerp(body.rotation, targetRotation, 50 * Time.deltaTime);
}
}
Problem is that you are trying to Rotate in local space around transform.up, which is in world space.
try to use just Vector3.up, instead of transform.up.
Or you can transform any vector from world to local space with transform.InverseTransformDirection()
transform.Rotate(Vector3.up * mouseX * Time.deltaTime, Space.Self);
I don't know hierarchy of your GameObjects. In order for this to work, you shuld rotate Player GameObject to face up to center of cilinder. And camera should be child of Player GameObject
First of all. I am pretty much a blank beginner and was trying to make a little game in unity.
It's a stick that gets addforced up and rotated at the same time.
Now the problem is that when I add the transform.up force, it is bound to the objects z rotate and not the global
Is there any way around that?
using UnityEngine;
public class LaunchCAR : MonoBehaviour
{
public Rigidbody2D rb2D;
public float thrust = 10.0f;
public float torque = 1f;
private void Start()
{
transform.position = new Vector3(0.0f, -2.0f, 0.0f);
}
void FixedUpdate()
{
if (Input.GetMouseButtonDown(0))
{
rb2D.AddRelativeForce(-(transform.up) * thrust, ForceMode2D.Impulse);
// float turn = Input.GetAxis("Horizontal");
rb2D.AddTorque(torque, ForceMode2D.Impulse);
}
}
}
AddRelativeForce expects object-space (local) coordinates, but you're passing transform.up which is in world-space coordinates.
Use either Vector3.up or AddForce instead.
I have a SMALL a problem. In Unity 3D 2020 Beta, I've put a player with a sphere collider on it and some cubes (walls) with box colliders. I've added a player controller script to the player object.
I've put the camera above the plane where the player and the walls are on, and I've made that the player should rotate to face the mouse position. I used rigidbody.AddForce for movement in a FixedUpdate function.
The player controller script is attached below:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerController : MonoBehaviour
{
[Header("Keys")]
public KeyCode forward;
public KeyCode backward;
public KeyCode left;
public KeyCode right;
public KeyCode fire;
[Header("Health")]
public int hitpoints = 3;
[Header("Movement")]
public float speed;
public float turningSpeed;
[Header("Shooting")]
public GameObject bulletPrefab;
public Transform bulletSpawner;
public float bulletSpeed;
public float reloadTime;
private float currentReload;
private Rigidbody rb;
private Quaternion targetRotation;
void Start()
{
rb = GetComponent<Rigidbody>();
currentReload = reloadTime;
}
void LateUpdate()
{
if (hitpoints == 0)
Die();
// Rotation
var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
if (Physics.Raycast(ray, out hit))
{
targetRotation = Quaternion.LookRotation(hit.point - transform.position);
Debug.DrawLine(transform.position, hit.point, Color.white);
}
transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, turningSpeed * Time.deltaTime);
transform.eulerAngles = new Vector3(0, transform.rotation.eulerAngles.y, 0);
currentReload += Time.deltaTime;
// Shooting
if (Input.GetKeyDown(fire) && currentReload >= reloadTime)
{
currentReload = 0f;
GameObject bulletGO = Instantiate(bulletPrefab, bulletSpawner.position, transform.rotation);
bulletGO.transform.position = bulletSpawner.position;
Bullet bulletScript = bulletGO.GetComponent<Bullet>();
bulletScript.speed = bulletSpeed;
Destroy(bulletGO, 5f);
}
}
void FixedUpdate()
{
// Movement
if (Input.GetKey(forward))
{
rb.AddForce(Vector3.forward * speed, ForceMode.Force);
}
if (Input.GetKey(backward))
{
rb.AddForce(-Vector3.forward * speed, ForceMode.Force);
}
if (Input.GetKey(left))
{
rb.AddForce(Vector3.left * speed, ForceMode.Force);
}
if (Input.GetKey(right))
{
rb.AddForce(Vector3.right * speed, ForceMode.Force);
}
//transform.position = new Vector3(transform.position.x, 10, transform.position.z);
// ON RIGIDBODY I HAVE CONSTRAINS:
// POSITION: Y (thats why I commented the line above)
// ROTATION: X, Z (topdown -> so I want only rotation on Y)
}
private void Die()
{
Destroy(gameObject);
}
}
But the problem is when the player hits very hard a wall, the sphere collider starts shaking and the player does not look at the mouse position exactly (it is somewhere 10 degrees away most of the times - it depends on how hard do I hit the walls).
I can record if it helps. If you want any information, feel free to ask! Any help will be appreciated! :)
The problem here seems to be you're directly altering the transform of your object despite having a Rigidbody component. Generally you should avoid altering a transform directly when you have a Rigidbody attached, especially a non-kinematic one, as by attaching one you are signalling that the object is to be controlled by the physics simulation.
Solutions I would explore:
If you don't need a rigidbody, don't use one
If you can avoid altering the transform directly, then do not do so. You can rotate objects by applying torque and the likes
Try setting your object to kinematic if you don't need collisions to affect the rigidbody's physics
Manually set the torque and velocity of your object to 0 each fixed update
Hi everybody, I'm trying to rotate a child game object relative to another child game object. For example, as shown in this heirarchy below, I'm trying to rotate PA_DroneBladeLeft (and PA_DroneBladeRight) with respect to their immediate parents PA_DroneWingLeft (and PA_DroneWingRight) respectively. I want these blades to spin in place. Instead I'm getting them to spin globally in the y-direction relative to the main parent (Air Drone). I would think that the line in Update method that I commented out should have worked, and it did but it still rotated relative to Air Drone and not in place. The second line, RotateAround method I've tried to create an empty game object called Left Pivot and put it approximately in the center of the left wing and have the left blade rotate around that, but it was no use.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class LeftBladeRotation : MonoBehaviour
{
GameObject leftBlade;
private float speed;
private float angle;
GameObject leftPivot;
// Start is called before the first frame update
void Start()
{
speed = 10f;
leftBlade = transform.Find("PA_DroneBladeLeft").gameObject;
angle = 0f;
leftPivot = GameObject.FindGameObjectWithTag("Air Drone").transform.Find("PA_Drone").transform.Find("PA_DroneWingLeft").transform.Find("Left Pivot").gameObject;
}
// Update is called once per frame
void Update()
{
angle += speed * Time.deltaTime;
Quaternion rotation = Quaternion.Euler(new Vector3(0f, angle, 0f));
//leftBlade.transform.localRotation = rotation;
leftBlade.transform.RotateAround(leftPivot.transform.localPosition, Vector3.up, angle);
}
}
This is your script with some little changes. It actually works when I attached it on the blade gameObject.
using UnityEngine;
public class BladeRotate : MonoBehaviour
{
private float _speed;
private float _angle;
private void Start()
{
_speed = 400f;
_angle = 0f;
}
private void Update()
{
_angle += _speed * Time.deltaTime;
var rotation = Quaternion.Euler(new Vector3(0f, _angle, 0f));
transform.localRotation = rotation;
}
}
The second line does not work because you rotate the blade around global y-axis by Vector3.up
Here is an alternative. Attach the following script on your blades.
using UnityEngine;
public class BladeRotate : MonoBehaviour
{
[SerializeField] private int speed = 400;
private Transform _transform;
private void Start()
{
_transform = transform;
}
private void Update()
{
transform.RotateAround(_transform.position, _transform.up, speed * Time.deltaTime);
}
}