Good evening!
I am trying to make a simple 2d platformer in unity without using rigidbodies, so I use raycast to determine where is the ground. I wrote this code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class comtroller : MonoBehaviour
{
private float velocity_y;
private float velocity_x;
private float speed_y = 1;
private float speed_x = 10;
private float localMinimum_y;
//mask of the platform
public LayerMask mask;
void Update()
{
// raycast to sense platforms
RaycastHit2D hit = Physics2D.Raycast((Vector2)transform.position , Vector2.down,Mathf.Infinity, mask);
if (hit)
{
localMinimum_y = hit.point.y;
}
else
{
localMinimum_y = -10;
}
//determine whether the player can fall down
// -0.6 is the distance between the player's transform.position and his legs
if(transform.position.y -0.6f < localMinimum_y)
{
speed_y = 0;
}
else
{
speed_y = 1;
}
//determine velocities
velocity_y = speed_y * Physics2D.gravity.y * Time.deltaTime;
velocity_x = Input.GetAxis("Horizontal") * speed_x * Time.deltaTime;
//movement
transform.Translate(new Vector2(velocity_x, velocity_y));
}
}
However, the player keeps stucking in the platform.
Can anyone help me where is the problem and how can I cure it?
Or if my idea is completely bad can you give any suggestion about how to do it?
Thank you
I recommend following this tutorial if you want to go the non rigidbody way of making a 2d platformer game. It shows you how to manage raycast to make a character move on ground, slope, platforms and many other things. It's really ressourceful and will probably help you a lot.
Related
I am very new to coding and i am trying to make a FPS, but i can't get the jumping mechanic to work. I am following a tutorial of Brackeys : https://www.youtube.com/watch?v=_QajrabyTJc
I have tried changing the standard jumping bind, i have tried using GetKeyDown(KeyCode.Space) instead of using GetButtonDown("Jump") , but nothing seems to work. Anybody knows how to fix this? I love you. Have been struggling for 16 hours now...
using System.Collections.Generic;
using UnityEngine;
public class playermm : MonoBehaviour
{
public CharacterController controller;
public float speed = 12f;
public float gravity = -9.81f;
public float jumpHeight = 3f;
public Transform groundCheck;
public float groundDistance = 0.4f;
public LayerMask groundMask;
Vector3 velocity;
bool isGrounded;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
isGrounded = Physics.CheckSphere(groundCheck.position, groundDistance, groundMask);
if(isGrounded && velocity.y < 0)
{
velocity.y = -2f;
}
float x = Input.GetAxis("Horizontal");
float z = Input.GetAxis("Vertical");
Vector3 move = transform.right * x + transform.forward * z;
controller.Move(move * speed * Time.deltaTime);
if(Input.GetKeyDown(KeyCode.Space) && isGrounded)
{
velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
}
velocity.y += gravity * Time.deltaTime;
controller.Move(velocity * Time.deltaTime);
}
}
Here is what I recommend.
Type in this command at the end:
Debug.Log(isGrounded);
It should print true if the character is on the ground. If it prints true, then the error is with your velocity and moving the character or square root expression.
If it prints false, then the problem is with your ground check. you should check the position of 'groundCheck', if it is at the bottom of the charcter, then that is okay. Next, check the 'groundDistance', if the value is about 0.5, it should be okay. Then check the groundMask. If the groundMask is the same mask that the ground is applied to, then that is fine. If it returned true, then one of these is wrong.
Links for extra help:
https://docs.unity3d.com/ScriptReference/LayerMask.html
https://docs.unity3d.com/ScriptReference/Physics.CheckSphere.html
Write back to me.
I'm trying to make a top-down shooter game in unity 2d. But the enemies are always clumping together. Does someone knows how to avoid it?
Here's my enemy code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Enemy : MonoBehaviour
{
public float moveSpeed;
public float stoppingDistance;
public Transform player;
private Rigidbody2D rb;
public GameObject effect;
public int health = 3;
public static int enemyCounter;
public SpriteRenderer enemy;
public Color hurtColor;
void Start() {
rb = GetComponent<Rigidbody2D>();
player = GameObject.FindGameObjectWithTag("Player").transform;
}
void Update() {
enemyCounter = EnemySpawner.enemyCounter;
Vector2 direction = transform.position - player.position;
if (Vector2.Distance(transform.position, player.position) > stoppingDistance) {
transform.position = Vector2.MoveTowards(transform.position, player.position,
moveSpeed * Time.deltaTime);
}
else if (Vector2.Distance(transform.position, player.position) > stoppingDistance) {
transform.position = this.transform.position;
}
}
IEnumerator Flash(){
enemy.color = hurtColor;
yield return new WaitForSeconds(0.01f);
enemy.color = Color.red;
}
void OnCollisionEnter2D(Collision2D other) {
if (other.gameObject.tag == "Bullet") {
StartCoroutine(Flash());
health -= 1;
}
if (health <= 0) {
GameObject DestroyEnemy = Instantiate(effect, transform.position, Quaternion.identity);
Destroy(this.gameObject);
Destroy(DestroyEnemy, 2f);
}
}
}
The enemies is moving towards the player, but they clump together when I move the player. I really need help.
If the enemies are moving in straight line to the player they will always clump up. If you want to ensure a minimal distance between enemies you could consider using a second larger collider on another layer but this will might end up looking bad and could make some exploits possible if too big.
The other alternative would be to change the behaviour of the enemies. Making an enemy move depending on the position of the other enemies seems complicated therefore i would simply try to add some randomness to their behaviour. Here are some ideas you could try:
-(would be my first try) switch randomly between two behaviours, 1: move straight to the player (always if very close to player), 2: move in a random direction (sometimes when further away from the player)
-don't give all your enemies the same speed
-make them move towards the player + a small random angle away from the player if far away
-...
To sum it up you will need an improved behaviour and there isn't a single solution.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;
public class Enemy : MonoBehaviour
{
public NavMeshAgent Ninja;
public GameObject Player;
public float NinjaDistanceRun = 30.0f;
void Start()
{
Ninja = GetComponent<NavMeshAgent>();
}
void Update()
{
float distance = Vector3.Distance(transform.position, Player.transform.position);
//Run towards player
if(distance < NinjaDistanceRun)
{
Vector3 dirToPlayer = transform.position - Player.transform.position;
Vector3 newPos = transform.position - dirToPlayer;
Ninja.SetDestination(newPos);
}
}
}
The code shown above is what I use to make the enemy follow the player when in range. Can I make my enemy go faster without trashing this whole script and making a new one that has a different line of thought?
Set the maximum speed for your ninja(NavMeshAgent.speed). Here is the documentation for more information:
https://docs.unity3d.com/ScriptReference/AI.NavMeshAgent-speed.html
In the START method you can set a new speed to your Navmesh agent, and this character will walk or run in the player direction.
I have designed a model in blender and imported in Unity and applied ThirdPersonController, ThirdPersonCharacter, ThirdPersonUserControl on it and got animation y following the guidelines, now i have created a script for shooting the bullets and attached it to the rigged hand/gun. But whenever i click "Fire1" the bullet is getting shooted in other direction..
I want when i move the mouse, the hand should move in the direction of the mouse + body should rotate in the direction of the mouse (if on backside) and when i left click, it should fire a bullet in the direction of the mouse(one at a time).
Video for better understanding - http://tinypic.com/r/34yohli/9
I tried a script, but its not following the way i want.
Shoot.js
#pragma strict var projectile : GameObject;
var fireRate = 0.5;
private var nextFire = 0.0;
var shotDelay = .5;
function Update ()
{
if (Input.GetButton ("Fire1") && Time.time > nextFire)
{
nextFire = Time.time + fireRate;
var clone = Instantiate (projectile, transform.position, transform.rotation);
}
}
MouseMovement.cs
using UnityEngine;
using System.Collections;
public class MouseMovement : MonoBehaviour
{
public float speed = 1.5f;
private Vector3 target;
void Start()
{
target = transform.position;
}
void Update()
{
if (Input.GetMouseButtonDown(0))
{
target = Camera.main.ScreenToWorldPoint(Input.mousePosition);
target.x = transform.position.x;
}
transform.position = Vector3.MoveTowards(transform.position, target, speed * Time.deltaTime);
}
}
To detect the movement of the mouse you should use the Input.GetAxis("Mouse X") or Input.GetAxis("Mouse Y"). If you want the camera to move with the character you can set it as a child of the character. You can check the MouseLook Script for more info.
This is a simplified code from what I'm trying to do:
var angle = 1.57;
if ( this.transform.rotation.y > angle ){
this.transform.rotation.y--;
} else if ( this.transform.rotation.y < angle ){
this.transform.rotation.y++;
}
I'm used to code in AS3, and if I do that in flash, it works perfectly, though in Unity3D it doesn't, and I'm having a hard time figuring out why, or how could I get that effect.
Can anybody help me? Thanks!
edit:
my object is a rigidbody car with 2 capsule colliders driving in a "bumpy" floor, and at some point he just loses direction precision, and I think its because of it's heirarchical rotation system.
(thanks to kay for the transform.eulerAngles tip)
transform.rotation retrieves a Quaternion. Try transform.rotation.eulerAngles.y instead.
Transform Rotation is used for setting an angle, not turning an object, so you would need to get the rotation, add your change, and then set the new rotation.
Try using transform.rotate instead.
Check the Unity3d scripting reference here:
http://unity3d.com/support/documentation/ScriptReference/Transform.Rotate.html
I see two problems so far. First the hierarchical rotation of Unity. Based on what you are trying to achieve you should manipulate either
transform.localEulerAngles
or
transform.eulerAngles
The second thing is, you can't modify the euler angles this way, as the Vectors are all passed by value:
transform.localEulerAngles.y--;
You have to do it this way:
Vector3 rotation = transform.localEulerAngles;
rotation.y--;
transform.localEulerAngles = rotation;
You need to create a new Quaternion Object
transform.rotation = Quaternion.Euler ( transform.rotation.x, transform.rotation.y++, transform.rotation.z );
You can also use transform.Rotate function.
The above suggestion to use transform.Rotate( ) is probably what you're going to need to do to actually make it rotate, BUT the variables of transform.Rotate( ) are velocity/speed rather than direction, so transform.Rotate( ) will have to use more than one axis if you want an angled rotation. Ex:
class Unity // Example is in C#
{
void Update( )
{
gameObject.transform.Rotate(0, 1, 0);
}
}
This will rotate the object around its y-axis at a speed of 1.
Let me know if this helps - and if it hinders I can explain it differently.
You should try multiplyng your rotation factor with Time.deltaTime
Hope that helps
Peace
Here is my script for GameObject rotation with touch
//
// RotateController.cs
//
// Created by Ramdhan Choudhary on 12/05/13.
//
using UnityEngine;
using System;
public class RotateController
{
private float RotationSpeed = 9.5f;
private const float mFingerDistanceEpsilon = 1.0f;
public float MinDist = 2.0f;
public float MaxDist = 50.0f;
private Transform mMoveObject = null;
private bool isEnabledMoving = false;
//************** Rotation Controller Constructor **************//
public RotateController (Transform goMove)
{
isEnabledMoving = true;
mMoveObject = goMove;
if (mMoveObject == null) {
Debug.LogWarning ("Error! Cannot find object!");
return;
}
}
//************** Handle Object Rotation **************//
public void Update ()
{
if (!isEnabledMoving && mMoveObject != null) {
return;
}
Vector3 camDir = Camera.main.transform.forward;
Vector3 camLeft = Vector3.Cross (camDir, Vector3.down);
// rotate
if (Input.touchCount == 1) {
mMoveObject.Rotate (camLeft, Input.touches [0].deltaPosition.y * RotationSpeed * Time.deltaTime, Space.World);
mMoveObject.Rotate (Vector3.down, Input.touches [0].deltaPosition.x * RotationSpeed * Time.deltaTime, Space.Self);
}
}
}