We Keep Coding

Unity player movement on moving planet

I am making a game involving orbital physics. I was successfully able to implement this with a slightly modified version of Brackeys gravity tutorial https://youtu.be/Ouu3D_VHx9o, this is the code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class gravity : MonoBehaviour
{
public GameObject self;
public Rigidbody rb;
public Vector3 initialVelocity;
const float G = 66.74f;
public static List<gravity> Attractors;
public bool isAttractable;
private void Awake()
{
rb.AddForce(initialVelocity);
}
private void FixedUpdate()
{
//planets
if (isAttractable == false)
{
foreach (gravity attractor in Attractors)
{
if (attractor != this)
Attract(attractor);
}
}
//players, spaceships, astroids, ect
if (isAttractable == true)
{
foreach (gravity attractor in Attractors)
{
if (attractor != this)
Attract(attractor);
}
}
}
void OnEnable()
{
if( isAttractable == false)
{
if (Attractors == null)
Attractors = new List<gravity>();
Attractors.Add(this);
}
}
void OnDisable()
{
if (isAttractable == false)
{
Attractors.Remove(this);
}
}
void Attract(gravity objToAttract)
{
Rigidbody rbToAttract = objToAttract.rb;
Vector3 direction = -1 * (rb.position - rbToAttract.position);
Vector3 Force = direction.normalized * (G * ((rb.mass * rbToAttract.mass) / direction.sqrMagnitude));
rb.AddForce(Force);
}
public GameObject GetClosestPlanet()
{
GameObject close = null;
float minDist = Mathf.Infinity;
foreach (gravity attracor in Attractors)
{
float dist = Vector3.Distance(attracor.transform.position, transform.position);
if (dist < minDist)
{
close = attracor.transform.gameObject;
minDist = dist;
}
}
return close;
}
}
Then for player movement I used (and modified) Sebastian Lagues tutorial https://youtu.be/TicipSVT-T8,
this resulted in this code for the player controller:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class playerController : MonoBehaviour
{
public float mouseSensitivityX = 250f;
public float mouseSensitivityY = 250f;
Transform cameraT;
float verticalLookRot;
private Rigidbody rb;
Vector3 moveAmount;
Vector3 smootgMoveVelocity;
public float moveSpeed = 15;
public float jumpForce = 220;
public LayerMask groundedMask;
public bool grounded;
public GameObject currentPlanet;
private gravity playerGravity;
private void Awake()
{
rb = GetComponent<Rigidbody>();
playerGravity = GetComponent<gravity>();
Cursor.lockState = CursorLockMode.Locked;
cameraT = Camera.main.transform;
}
void Update()
{
currentPlanet = playerGravity.GetClosestPlanet();
//camera
transform.Rotate(Vector3.up * Input.GetAxis("Mouse X") * Time.deltaTime * mouseSensitivityX);
verticalLookRot += Input.GetAxis("Mouse Y") * Time.deltaTime * mouseSensitivityY;
verticalLookRot = Mathf.Clamp(verticalLookRot, -60, 60);
cameraT.localEulerAngles = Vector3.left * verticalLookRot;
//move input
Vector3 moveDir = new Vector3(Input.GetAxisRaw("Horizontal"), 0, Input.GetAxisRaw("Vertical")).normalized;
Vector3 targetMoveAmount = moveDir * moveSpeed;
moveAmount = Vector3.SmoothDamp(targetMoveAmount, targetMoveAmount, ref smootgMoveVelocity, .15f);
//level on planet
if(currentPlanet != null)
{
transform.rotation = Quaternion.FromToRotation(transform.up, (transform.position - currentPlanet.transform.position).normalized) * transform.rotation;
}
//jump
if (Input.GetButtonDown("Jump"))
{ if(grounded)
{
rb.AddForce(transform.up * jumpForce);
print("u jumped");
}
}
}
private void FixedUpdate()
{
//move
rb.MovePosition(rb.position + transform.TransformDirection(moveAmount) * Time.fixedDeltaTime);
//check if on ground
Ray ray = new Ray(transform.position, -transform.up);
RaycastHit hit;
grounded = Physics.Raycast(ray, out hit, transform.localScale.y + 1.1f, groundedMask);
}
}
Now for the issue, this systems works fine when the planet the player is walking on is stationary. As in there are no other attracting bodys in the system and the planet has no initial velocity. However if the planet is moving the player will bounce up and down uncontrollably and will not be able to walk a certain distance away from the planets farthest point from its direction of movement. Here is a recording of this: https://youtu.be/noMekosb7CU
Does anyone know what is causing the bouncing and walking restrictions and how I can fix it?
Some notes on suggested solutions that haven't worked:
-set the planet as the players parent object, same results
-increase players mass, same results
-set the players velocity to += the planets velocity, same results or player goes into infinity

For me it seems to be working "correctly".
Looking like your player is attracted correctly and when the planet moves, your player is quickly moving towards the planet.
I think you could temporarily assign the player as a child gameobject to the planet he's walking on and he should probably move correctly along the planet coordinates and not on global coordinates. (If it works, you could just always assign the player as a child gameObject to every new planet that he visits)

Camera is revolving when rigidbody attached to player

I am new to game development and trying to build an endless runner game just for my hands-on on Unity3D game development, it was running smoothly before applying jump functionality to the player, here are my code for player movement.
public class RockeyMovement : MonoBehaviour
{
public float rockyMoveForwardSpeed = 5f;
public float rockyMoveLeftRightSpeed = 4f;
public Vector3 jump;
public float jumpForce = 2.0f;
public bool isGrounded;
Rigidbody rb;
void Start()
{
rb = GetComponent<Rigidbody>();
jump = new Vector3(0.0f, 2.0f, 0.0f);
}
void OnCollisionStay()
{
isGrounded = true;
}
void Update()
{
transform.Translate(Vector3.forward * Time.deltaTime * rockyMoveForwardSpeed, Space.World);
if (Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.LeftArrow))
{
if (this.gameObject.transform.position.x > LevelControl.leftSide)
{
transform.Translate(Vector3.left * Time.deltaTime * rockyMoveLeftRightSpeed);
}
}
if (Input.GetKey(KeyCode.D) || Input.GetKey(KeyCode.RightArrow))
{
if (this.gameObject.transform.position.x < LevelControl.rightSide)
{
transform.Translate(Vector3.left * Time.deltaTime * rockyMoveLeftRightSpeed * -1);
}
}
if (Input.GetKeyDown(KeyCode.Space) && isGrounded)
{
rb.AddForce(jump * jumpForce, ForceMode.Impulse);
isGrounded = false;
}
}
}
Player Inspector
Errors
Hierarchy
As you can see I just drop Main Camera on to player so that camera follow player,
That is how my game is behaving
My game was working fine before implementing that jump functionality to the player. as i am new please tell me how to solve that issue which i am facing.

Instead of attaching your camera as a child of a player you could use PositionConstraint just align your camera relative to the player with offsets then just attach the PositionConstraint component on your camera with following settings
By doing this your camera will only follow your player's position.

Unity fix NavMeshAgent jerky movements?

Record of the problem
https://youtu.be/BpzHQkVQz5A
Explaining my problem
I'm programming a mobile game using Unity3D Engine. For my player movement, I'm using NavMeshAgent because it's for me the easiest and most efficient way to do it. But when I hit the play button and ask my player to move, the movements are jerky and it's not pleasant to see at all.
Do you have any idea to fix this problem ?!
Thank you in advance for your answers ! ^^
My code
This is my code :
Player.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;
public class Player : MonoBehaviour
{
NavMeshAgent agent;
Touch touch;
RaycastHit hit;
Ray ray;
// START FUNCTION
private void Start()
{
agent = GetComponent<NavMeshAgent>();
}
// UPDATE FUNCTION
private void Update()
{
// TOUCH DETECTION
if (Input.touchCount > 0)
{
touch = Input.GetTouch(0);
// A FINGER TOUCHED THE SCREEN
if (touch.phase == TouchPhase.Began)
{
// RETURN X, Y AND Z WORLD POS OF THE TOUCH SCREEN POS
ray = Camera.main.ScreenPointToRay(touch.position);
if (Physics.Raycast(ray, out hit))
{
if (hit.collider != null)
{
// MOVING PLAYER TO THE HIT POS
Vector3 hitVec = new Vector3(hit.point.x, hit.point.y + (GetComponent<Collider>().bounds.size.y / 2), hit.point.z);
agent.SetDestination(hitVec);
}
}
}
}
// SAME CODE USING MOUSE BUTTON
#if UNITY_EDITOR
if (Input.GetMouseButton(0))
{
ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, out hit))
{
if (hit.collider != null)
{
Vector3 hitVec = new Vector3(hit.point.x, hit.point.y + (GetComponent<Collider>().bounds.size.y / 2), hit.point.z);
agent.SetDestination(hitVec);
}
}
}
#endif
}
}
CameraFollow.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
// BRACKEYS CAMERA FOLLOW SCRIPT WITHOUT THE LOOKAT METHODE
public class CameraFollow : MonoBehaviour
{
public Transform target;
public float smoothSpeed = 0.2f;
public Vector3 offset;
void FixedUpdate()
{
Vector3 desiredPosition = target.position + offset;
Vector3 smoothedPosition = Vector3.Lerp(transform.position, desiredPosition, smoothSpeed);
transform.position = smoothedPosition;
}
}

The problem isn't the navmesh controller but the camera follow script.
One thing you could try is to move the camera position using only the desiredPosition or use Vector3.SmoothDamp:
private Vector3 velocity;
void LateUpdate(){
...
Vector3 desiredPosition = target.position + offset;
Vector3 smoothedPosition = Vector3.SmoothDamp(transform.position, desiredPosition, ref velocity, smoothSpeed);
transform.position = smoothedPosition;
}
Also this is explained in a pinned comment on the Brackeys video

How Do I Shoot a Projectile into the Direction the Player is Facing?

I am creating a 2D side-scroller video game in Unity using c#. I have created the script that makes the player face the direction that the arrow key that was pressed was pointing to (when the right arrow is pressed, the player faces right. When the left arrow is pressed, the player faces left).
However, I cannot figure out how to make the harpoon that the player shoots point in the direction the player is facing. I have found many questions on Stack Overflow asking questions like this, but none of their answers worked for me.
Can anyone please tell me how to make the harpoon the player shoots face the direction the player is facing? Thanks in advance!
Here is my code that I use-
PLAYER SCRIPT
using UnityEngine;
using System.Collections;
public class playerMove : MonoBehaviour {
// All Variables
public float speed = 10;
private Rigidbody2D rigidBody2D;
private GameObject harpoon_00001;
private bool facingRight = true;
void Awake () {
rigidBody2D = GetComponent<Rigidbody2D>();
harpoon_00001 = GameObject.Find("harpoon_00001");
}
void Update () {
if (Input.GetKeyDown(KeyCode.LeftArrow) && !facingRight) {
Flip();
}
if (Input.GetKeyDown(KeyCode.RightArrow) && facingRight) {
Flip();
}
}
void Flip () {
facingRight = !facingRight;
Vector3 theScale = transform.localScale;
theScale.x *= -1;
transform.localScale = theScale;
}
void FixedUpdate () {
float xMove = Input.GetAxis("Horizontal");
float yMove = Input.GetAxis("Vertical");
float xSpeed = xMove * speed;
float ySpeed = yMove * speed;
Vector2 newVelocity = new Vector2(xSpeed, ySpeed);
rigidBody2D.velocity = newVelocity;
if (Input.GetKeyDown("space")) {
GetComponent<AudioSource>().Play();
Instantiate(harpoon_00001,transform.position,transform.rotation);
}
}
}
HARPOON SCRIPT
using UnityEngine;
using System.Collections;
public class harpoonScript : MonoBehaviour {
// Public variable
public int speed = 6;
private Rigidbody2D r2d;
// Function called once when the bullet is created
void Start () {
// Get the rigidbody component
r2d = GetComponent<Rigidbody2D>();
// Make the bullet move upward
float ySpeed = 0;
float xSpeed = -8;
Vector2 newVelocity = new Vector2(xSpeed, ySpeed);
r2d.velocity = newVelocity;
}
void Update () {
if (Input.GetKeyDown(KeyCode.LeftArrow)) {
float xSpeed = -8;
}
if (Input.GetKeyDown(KeyCode.RightArrow)) {
float xSpeed = 8;
}
}
void OnTriggerEnter2D(Collider2D other) //hero hits side of enemy
{
Destroy(other.gameObject.GetComponent<Collider2D>()); //Remove collider to avoid audio replaying
other.gameObject.GetComponent<Renderer>().enabled = false; //Make object invisible
Destroy(other.gameObject, 0.626f); //Destroy object when audio is done playing, destroying it before will cause the audio to stop
}
}

You already defining a variable facingRight to know the direction of the the player. You can use that knowledge to control the harpoon.
For example:
// this line creates a new object, which has harpoonScript attached to it.
// In unity editor, you drag and drop this prefab(harpoon_00001) into right place.
// transform.position is used for the starting point of the fire. You can also add +-some_vector3 for better placement
// Quaternion.identity means no rotation.
harpoonScript harpoon = Instantiate(harpoon_00001,transform.position, Quaternion.identity) as harpoonScript;
// Assuming harpoon prefab already facing to right
if (!facingRight) {
// Maybe, not required
harpoon.transform.eulerAngles = new Vector3(0f, 0f, 180f); // Face backward
Vector3 theScale = harpoon.transform.localScale;
theScale.y *= -1;
harpoon.transform.localScale = theScale; // Flip on y axis
}

Unity3D with C# to achieve Click To Move

I've a problem when I use unity3D with C# to achieve Click To Move.
It means the character move to where my mouse clicked.
But when my character move to destination,it will span itself.
I think it's perhaps wrong in this line
"controller.SimpleMove (transform.forwardspeed);"
when I click to position like(20.5,10.1) with decimal point or some number I can't present in "transform.forwardspeed" ,cause my character can never achieve to this position but keep trying to. So my character span and span.....
It's my guess right?
If true ,how can I fix it?
This is my Script for ClickToMove
using UnityEngine;
using System.Collections;
public class ClickToMove : MonoBehaviour {
public float speed;
public CharacterController controller;
private Vector3 position;
public int arrive =1;
void Start ()
{
}
void Update ()
{
if (Input.GetMouseButton (0))
{
//Locate where we click
locatePosition();
}
MoveToPos ();
//Move to where we click
}
void locatePosition()
{
RaycastHit hit;
Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
if (Physics.Raycast (ray, out hit, 1000))
{
position = new Vector3(hit.point.x,hit.point.y,hit.point.z);
Debug.Log(position);
}
}
void MoveToPos()
{ if (Vector3.Distance (transform.position, position) > 1)
{
Quaternion newRotation = Quaternion.LookRotation (position - transform.position);
newRotation.x = 0f;
newRotation.z = 0f;
transform.rotation = Quaternion.Slerp (transform.rotation, newRotation, Time.deltaTime * 10);
controller.SimpleMove (transform.forward*speed);
}
}
}