I've made a code for the enemy where it will go left and right and stop at the ledge, but for some reason the enemy will just disappear into thin air, but the enemy can still hit you, when I am going near where the enemy is located.
Here is the code I've made for the Enemy AI:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PatrollingEnemy : MonoBehaviour
{
public float speed;
private bool movingRight = true;
public Transform groundDetection; //detects the ground if it is there...
// Update is called once per frame
void Update()
{
transform.Translate(Vector2.right * speed * Time.deltaTime);
RaycastHit2D groundInfo = Physics2D.Raycast(groundDetection.position, Vector2.down, 2f);
if (groundInfo.collider == false)
{
if(movingRight == true)
{
transform.eulerAngles = new Vector2(0, -200);
movingRight = false;
}
else
{
transform.eulerAngles = new Vector2(0, 0);
movingRight = true;
}
}
}
}
Here is the link if you want to see how it works with this code: Link for Bug
It occurs because the z-axis value of the enemy transform decreases by time until it's less than the CAMERA z-axis value and moves outside the camera view.
The main problem is that you set transform.eulerAngles = new Vector2(0, -200); when the enemy moves to the left direction and when you combine this code with the transform.Translate(Vector2.right * speed * Time.deltaTime);, the enemy moves in its right vector with -200 angle and so after some times, it goes outside the camera view (Because the camera z-index is probably set to -10 by default).
You need to set the local angle of the y axis value to 180:
...
if (groundInfo.collider == false)
{
if(movingRight == true)
{
transform.eulerAngles = new Vector2(0, 180); // Change -200 to 180
movingRight = false;
}
...
}
...
ANOTHER WAY: if you want to change the enemy face direction to the left side, you can set localScale.x to -1 instead of using rotation.
Here is a simple example:
// Change face direction to the right when Moving RIGHT
transform.localScale= new Vector3(transform.localScale.x, transform.localScale.y, transform.localScale.z);
// Change face direction to the left when Moving LEFT
transform.localScale= new Vector3(-transform.localScale.x, transform.localScale.y, transform.localScale.z);
Related
I am currently making a Katamari/Billy Hatcher game where the player has to roll spheres around. When the game starts the player has normal platformer controls until it approaches a sphere and if the player presses the "attach" button, the player becomes a child of the sphere. The issue I am having is whenever this happens, the player rotates with the sphere. I tried freezing the player's rigid body so it can stop rotating but that just stops the sphere's rotation. Is there any way to stop the rotation of the player, while keeping the sphere rotating?
Picture:
enter image description here
Here's my scripts for the process:
Rigidbody hitRB;
public Vector3 offset = new Vector3(0, 0, 1);
public LayerMask pickupMask;
bool isAttached;
private void TouchingGum()
{
RaycastHit hit = new RaycastHit();
foreach (GameObject gumball in gumBalls)
{
if (Input.GetButtonDown("Attach") && Physics.Raycast(transform.position,transform.forward, out hit, attachRequireDistance, pickupMask))
{
isAttached = true;
Debug.Log(true);
}
else
{
isAttached = false;
}
}
if (isAttached)
{
hitRB = hit.collider.gameObject.GetComponent<Rigidbody>();
Vector3 heldOffset = transform.right * offset.x + transform.up * offset.y + transform.forward * offset.z;
hitRB.isKinematic = true;
hitRB.MovePosition(player.transform.position + heldOffset);
}
else if(!isAttached && !hitRB == null)
{
hitRB.isKinematic = false;
}
If you can, don’t use parent/child relationships in these situations. I feel that there is always a better way. One way of accomplishing this is by taking the player’s transform, and adding the forward direction to an offset:
Vector3 offset = new Vector3(0, 0, 1);
LayerMask pickupMask; //change to mask of objects that can be picked up in editor.
public bool held;
void Update()
{
RaycastHit hit;
if (Input.GetKey(KeyCode.Mouse0) && Physics.Raycast(transform.position, transform.forward, out hit, 2, pickupMask))
{
held = true;
}
else
{
held = false
}
Rigidbody hitRB = hit.collider.gameObject.GetComponent<Rigidbody>();
if (held)
{
Vector3 heldOffset = (transform.right * offset.x) + (transform.up * offset.y) + (transform.forward * offset.z);
// if it still glitches, remove the previous line and add the line after this one.
Vector3 heldOffset = transform.forward * offset.z;
hitRB.isKinematic = true;
hit.collider.gameObject.transform.position = transform.position + heldOffset;
}
if else (!held && !hitRB == null)
{
hitRB.isKinematic = false;
}
}
This script uses raycast and input to detect if the player is clicking the left mouse button and is looking at an object within 2 distance and with a certain layer mask. Then it will set the velocity to the offset plus the player’s position. In other words, this gets the object you looked at while pressing left click, and holds it in front of you (or whatever the offset is).
I am a freshman design student and they've asked us to create a game on unity3D without much training on it so needless to say I don't know much except for the super basic stuff. I don't know anything about c# and I've been having an issue making a gameobject teleport. I've spent 6 hours searching for a solution online and the only conclusion I got to was that my object is probably having issues teleporting because of the way I am controlling it - something to do with the controller remembering the last position before the teleport and returning to it. I have no idea how to fix it though.
So this is what my scene looks like: I have a sphere as my character, I move it to this other object that has a collider as trigger which then teleports my sphere to a different point (black object) on the terrain. As soon as my object reaches there, it starts sliding back to the point where the teleport happened. I even tried edit > project settings > physics > auto sync transforms as many suggested that and it worked for them.
This is the code by which I control my player:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class MyPlayer : MonoBehaviour
{
public float speed = 1;
public float spacing = 1;
private Vector3 pos;
// Use this for initialization
void Awake()
{
pos = transform.position;
}
// Update is called once per frame
void Update()
{
if (Input.GetKeyDown(KeyCode.W))
pos.x += spacing;
if (Input.GetKeyDown(KeyCode.S))
pos.x -= spacing;
if (Input.GetKeyDown(KeyCode.D))
pos.z -= spacing;
if (Input.GetKeyDown(KeyCode.A))
pos.z += spacing;
transform.position = Vector3.MoveTowards(transform.position, pos, speed * Time.deltaTime);
}
}
and I also have a camera that follows the sphere using this code
using UnityEngine;
using System.Collections;
public class CompleteCameraController : MonoBehaviour {
public GameObject player; //Public variable to store a reference to the player game object
private Vector3 offset; //Private variable to store the offset distance between the player and camera
// Use this for initialization
void Start ()
{
//Calculate and store the offset value by getting the distance between the player's position and camera's position.
offset = transform.position - player.transform.position;
}
// LateUpdate is called after Update each frame
void LateUpdate ()
{
// Set the position of the camera's transform to be the same as the player's, but offset by the calculated offset distance.
transform.position = player.transform.position + offset;
}
}
and I have another code on the camera that makes me be able to look around using my mouse
using UnityEngine;
using System.Collections;
public class FlyCamera : MonoBehaviour
{
/*
Writen by Windexglow 11-13-10. Use it, edit it, steal it I don't care.
Converted to C# 27-02-13 - no credit wanted.
Simple flycam I made, since I couldn't find any others made public.
Made simple to use (drag and drop, done) for regular keyboard layout
wasd : basic movement
shift : Makes camera accelerate
space : Moves camera on X and Z axis only. So camera doesn't gain any height*/
float mainSpeed = 700.0f; //regular speed
float shiftAdd = 950.0f; //multiplied by how long shift is held. Basically running
float maxShift = 2000.0f; //Maximum speed when holdin gshift
float camSens = 0.25f; //How sensitive it with mouse
private Vector3 lastMouse = new Vector3(255, 255, 255); //kind of in the middle of the screen, rather than at the top (play)
private float totalRun = 1.0f;
void Update()
{
lastMouse = Input.mousePosition - lastMouse;
lastMouse = new Vector3(-lastMouse.y * camSens, lastMouse.x * camSens, 0);
lastMouse = new Vector3(transform.eulerAngles.x + lastMouse.x, transform.eulerAngles.y + lastMouse.y, 0);
transform.eulerAngles = lastMouse;
lastMouse = Input.mousePosition;
//Mouse camera angle done.
//Keyboard commands
float f = 0.0f;
Vector3 p = GetBaseInput();
if (Input.GetKey(KeyCode.LeftShift))
{
totalRun += Time.deltaTime;
p = p * totalRun * shiftAdd;
p.x = Mathf.Clamp(p.x, -maxShift, maxShift);
p.y = Mathf.Clamp(p.y, -maxShift, maxShift);
p.z = Mathf.Clamp(p.z, -maxShift, maxShift);
}
else
{
totalRun = Mathf.Clamp(totalRun * 0.5f, 1f, 1000f);
p = p * mainSpeed;
}
p = p * Time.deltaTime;
Vector3 newPosition = transform.position;
if (Input.GetKey(KeyCode.Space))
{ //If player wants to move on X and Z axis only
transform.Translate(p);
newPosition.x = transform.position.x;
newPosition.z = transform.position.z;
transform.position = newPosition;
}
else
{
transform.Translate(p);
}
}
private Vector3 GetBaseInput()
{ //returns the basic values, if it's 0 than it's not active.
Vector3 p_Velocity = new Vector3();
if (Input.GetKey(KeyCode.W))
{
p_Velocity += new Vector3(0, 0, 1);
}
if (Input.GetKey(KeyCode.S))
{
p_Velocity += new Vector3(0, 0, -1);
}
if (Input.GetKey(KeyCode.A))
{
p_Velocity += new Vector3(-1, 0, 0);
}
if (Input.GetKey(KeyCode.D))
{
p_Velocity += new Vector3(1, 0, 0);
}
return p_Velocity;
}
}
Please let me know if there's a specific part of my code that I need to edit to resolve this or alternatively if you have a different code that won't give me this issue, that would make my life so much easier. If I need to edit something or you're sharing a code, please respond with the complete (corrected) code because otherwise I will just be even more confused.
I know this is a super long post and I am sorry but I am really desperate. It's been really hard studying online and basically having to teach myself all of this. This is for a final project so I will really appreciate any help you can throw my way. Thank you for reading and thanks for any help in advance.
EDIT: The teleport code is executing fine because I do teleport to the chosen location, I just end up sliding back to the point which I teleported from.
This is the teleporting code I am using.
using UnityEngine;
using System.Collections;
public class Teleport : MonoBehaviour
{
public GameObject ui;
public GameObject objToTP;
public Transform tpLoc;
void Start()
{
ui.SetActive(false);
}
void OnTriggerStay(Collider other)
{
ui.SetActive(true);
if ((other.gameObject.tag == "Player") && Input.GetKeyDown(KeyCode.E))
{
objToTP.transform.position = tpLoc.transform.position;
}
}
void OnTriggerExit()
{
ui.SetActive(false);
}
}
Ok, so the main reason why your character is drifting back to original position is that the pos variable in the MyPlayer script stays the same after teleporting.
Remedy for that will be changing pos variable from Teleport script after objToTP.transform.position = tpLoc.transform.position;. Something like objToTP.gameobject.GetComponent<MyPlayer>().pos = tpLoc.transform.position;
But make sure that objToTP has component MyPlayer and pos in MyPlayer is public.
Once again: it's a simple way to resolve your problem. In a real project you should create more flexible architecture, but that's a different story.
I believe that you sliding back because you moving player with transform.position = Vector3.MoveTowards in Update().
And you moving it to coordinates that was got from your input
I'm trying to make a patrolling AI character that will move from point to point.
The patrol part works perfectly. However, the problem is that the sprite only faces right. When it turned the sprite stays facing the same direction.
I have tried to change the transform rotation using transform.rotate, transform.rotation, transform.Quaternion and making a variable to store the rotation value yet they all kick errors back. The errors are usually made from the rotate/rotation functions not being compatible with any of the attempts I have tried.
Here is my code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// To do:
/// - make rotation of enemy sprite work when reaching the end of patrol area
/// - create attack function
/// </summary>
public class Enemy : MonoBehaviour
{
public int health;
public float speed;
public GameObject bloodEffect;
public Transform[] moveSpots; //patrol spots
public float startWaitTime; //start countdown till move to next spot
private Rigidbody2D rb;
private Animator anim;
private int randomSpot; //number of patrol spots
private float waitTime; //how long enemy stays at patrol spot for
// Start is called before the first frame update
void Start()
{
waitTime = startWaitTime; //make waittime equal to startwaittime
anim = GetComponent<Animator>();
randomSpot = Random.Range(0, moveSpots.Length); //choose a random first spot
}
// Update is called once per frame
void Update()
{
Vector3 spriteRotation = new Vector3(0, randomSpot, 0);
transform.position = Vector2.MoveTowards(transform.position, moveSpots[randomSpot].position, speed * Time.deltaTime); //move toward first patrol area
transform.eulerAngles = spriteRotation;
if (Vector2.Distance(transform.position, moveSpots[randomSpot].position) < 0.5f) //asks if patrol point is further that .5f away from enemy
{
if (waitTime <= 0) //if waitTime less than or equal to 0
{
randomSpot = Random.Range(0, moveSpots.Length); //picks new patrol point
waitTime = startWaitTime; //restarts countdown clock
}
else
{
waitTime -= Time.deltaTime; //counts down clock till next point
}
}
if (health <= 0)
{
Destroy(gameObject);
}
}
public void TakeDamage(int damage)
{
Instantiate(bloodEffect, transform.position, Quaternion.identity);
Debug.Log("Blood effect played");
health -= damage;
Debug.Log("Damage Taken");
}
}
The expected results for this code is that a random point will be chosen and the AI will move toward that chosen point. Once there it will stay idle for a specified amount of time before turning and moving to a new spot.
The actual result is mostly the same as expected only the sprite does not turn around but instead continues to face to the right even when the AI is moving left.
Image of area
the enemy is the dark red cube, the movepoints are the points that the enemy patrols between. when it reaches the left point, he should turn to the right and go back but this is not what happens, instead he just moves back and forth with no rotation. ive tried the SpriteRenderer.flipX route and it only works one time and then sticks with that direction.
The SpriteRenderer Component has a Flip attribute you could use for this.
You can access it in code
SpriteRenderer.flipX = true;
It will only flip the sprite and won't change anything else, so double check if your colliders are still in the right space :) See more in the documentation
Good luck
randomSpot is an index not an angle. So using
transform.eulerAngles = new Vector3(0, randomSpot, 0);
doens't make any sense to me ...
Instead of rotating you could also flip the sprite/Image by using a negative scale like e.g.
// Update is called once per frame
private void Update()
{
// however you determin if facing left or right
// you e.g. simply check whether the target position
// is left or right of you
var difference = moveSpots[randomSpot].position - transform.position;
var isFacingRight = difference.x > 0;
if (isFacingRight && transform.localScale.x < 0
|| !isFacingRight && transform.localScale.x > 0)
{
FlipSprite();
}
}
private void FlipSprite()
{
// invert the local X-axis scale
transform.localScale = new Vector3(-spriteTransform.localScale.x, spriteTransform.localScale.y, spriteTransform.localScale.z);
}
Script used for the example
private void Update()
{
// works only in a ScreenOverlay Canvas
var targetPosition = Input.mousePosition;
var difference = targetPosition - transform.position;
var isFacingRight = difference.x > 0 ? true : false;
if (isFacingRight && transform.localScale.x < 0
|| !isFacingRight && transform.localScale.x > 0)
{
FlipSprite();
}
// simply only move left or right on the x-axis towards the mouse
transform.position = Vector3.MoveTowards(transform.position, new Vector3(targetPosition.x, 218, 0), Time.deltaTime * 100);
}
private void FlipSprite()
{
// invert the local X-axis scale
transform.localScale = new Vector3(-transform.localScale.x, transform.localScale.y, transform.localScale.z);
}
You can try:
if (moveSpot[randomSpot].transform.position.x > transform.position.x) {
transform.localScale = new Vector3(-1, 1, 1);
}
else {
transform.localScale = new Vector3(1, 1, 1);
}
I am creating a game in Unity 2D. I have Dragons that I am adding to the scene. The dragons are only supposed to move in 1 of 4 directions, Up, Down, Left and Right. the dragons that move left and right move exactly as intended. However the dragons that move up and down have a problem in that they move at an angle. All dragons that move upwards move up and to the right at a 45 degree angle. All dragons that move downwards move down and to the left at a 45 degree angle.
at first I thought it was a problem with the animator moving the dragon to a different location, but I removed the animator component from the prefab and the problem still persisted.
below is the code I am using to move the dragons.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class DragonMovment : MonoBehaviour {
public string Direction; //needs to be set in the prefab
public float DragonSpeed; //speed of dragon
Rigidbody2D rb;
public Transform Boundries;
// Use this for initialization
void Start ()
{
rb = GetComponent<Rigidbody2D>();
}
// Update is called once per frame
void FixedUpdate ()
{
float MoveRight = 1;
float MoveLeft = -1;
float MoveUp = 1;
float MoveDown = -1;
if (Direction== "R")
{
rb.velocity = new Vector3(DragonSpeed * MoveRight, rb.velocity.y);
}
if (Direction == "L")
{
rb.velocity = new Vector3(DragonSpeed * MoveLeft, rb.velocity.y);
}
if (Direction == "U")
{
rb.velocity = new Vector3(DragonSpeed * MoveUp, rb.velocity.x);
}
if (Direction == "D")
{
rb.velocity = new Vector3(DragonSpeed * MoveDown, rb.velocity.x);
}
}
}
Edit.
So why does the following work.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerControler : MonoBehaviour {
// speed of movment
public float Speed;
// rb
Rigidbody2D rb;
public Transform Boundries;
// Use this for initialization
void Start () {
rb = GetComponent<Rigidbody2D>();
}
void FixedUpdate()
{
// get horizontal input
float MoveSide = Input.GetAxis("Horizontal");
//get vertical input
float MoveVert = Input.GetAxis("Vertical");
// move horizontal
rb.velocity = new Vector3(Speed * MoveVert, rb.velocity.y);
// move vertical
rb.velocity = new Vector3(Speed * MoveSide, rb.velocity.x);
}
}
but the other code doesent?
You have got the velocity x in the y of the vector 3
if (Direction == "U")
{
rb.velocity = new Vector3(rb.velocity.x, DragonSpeed * MoveUp);
}
if (Direction == "D")
{
rb.velocity = new Vector3(rb.velocity.x, DragonSpeed * MoveDown);
}
It works in your player script as you are overriding the values in the subsequent statement.
float MoveSide = Input.GetAxis("Horizontal"); //eg 1
float MoveVert = Input.GetAxis("Vertical"); // eg 1
// setting your x velocity incorrectly to the y (vert) velocity speed and keeping y the same velocity as start of frame
rb.velocity = new Vector3(Speed * MoveVert, rb.velocity.y);
// Set the y to the x value of the statement above so it is now in the correct vector and set the x to the correct hoz velocity
rb.velocity = new Vector3(Speed * MoveSide, rb.velocity.x);
// effectively doing
rb.velocity = new Vector3(Speed * MoveSide, Speed * MoveVert);
You should also be using MovePosition as it doesn't directly affect the physics engine (using velocity can have knock on effects to collisions and triggers and create unexpected physics). Your gameobjects will have to be marked as kinematic otherwise the below will cause them to teleport to the new position instantly.
var movementDirection = new Vector3(Speed * MoveSide, Speed * MoveVert);
rb.MovePosition(transform.position + movementDirection * Time.deltaTime);
And the * Time.deltaTime ensures that movement is consistent for different framerates. If you run the game on a 30 fps machine the game objects will move slower than a 60fps. Time.deltaTime calculates the physical time passed since the previous frame and ensures the distance traveled is the same regardless of frame rate.
e.g say the gameObject moves 1 per frame update. After a second on a 30 fps machine the object would have moved 30. After a second on a 60 fps machine the object would have moved 60.
Time.deltaTime=.2s on 30 fps so 1 movement * .2 = move .2 per frame * 30 frames in the second = 60 moved
Time.deltaTime=.1s on 60 fps so 1 movement * .1 = move .1 per frame * 60 frames in the second = 60 moved
I've got a quick question regarding 2D Sprite animations that I haven't been able to find specifically answered anywhere:
I have a sprite with walk animations to the right. However, I obviously want to flip the animation to the left when he walks left (2D side-scroller).
I can easily flip the sprite itself, using transform.localscale.x, however, that only flips the sprite. Not the animation clip. (This no longer happens in Unity)
So, while the sprite flips, the minute the animation clip begins playing, it flips back right (as the only animation clip I have is for the right facing sprite).
Is the only way to do this to flip the sprites in Photoshop, or is there a way to do it in Unity?
Thanks!
UPDATE: With the actual versions of unity if you scale the transform by multiplying it by -1, the animation frames are also scaled.
I finally figured it out by doing this:
void Flip()
{
// Switch the way the player is labelled as facing
facingRight = !facingRight;
// Multiply the player's x local scale by -1
Vector3 theScale = transform.localScale;
theScale.x *= -1;
transform.localScale = theScale;
}
This is from Unity's 2D Platformer example.
To implement some sort of checking which makes use of the Flip method, you can do something similar to the below example which is basic movement code. facingRight is set as a value on the class so that the other methods can use it, and it is defaulted to false.
void Update()
{
//On X axis: -1f is left, 1f is right
//Player Movement. Check for horizontal movement
if (Input.GetAxisRaw ("Horizontal") > 0.5f || Input.GetAxisRaw("Horizontal") < -0.5f)
{
transform.Translate (new Vector3 (Input.GetAxisRaw ("Horizontal") * moveSpeed * Time.deltaTime, 0f, 0f));
if (Input.GetAxisRaw ("Horizontal") > 0.5f && !facingRight)
{
//If we're moving right but not facing right, flip the sprite and set facingRight to true.
Flip ();
facingRight = true;
} else if (Input.GetAxisRaw("Horizontal") < 0.5f && facingRight)
{
//If we're moving left but not facing left, flip the sprite and set facingRight to false.
Flip ();
facingRight = false;
}
//If we're not moving horizontally, check for vertical movement. The "else if" stops diagonal movement. Change to "if" to allow diagonal movement.
} else if (Input.GetAxisRaw ("Vertical") > 0.5f || Input.GetAxisRaw("Vertical") < -0.5f)
{
transform.Translate (new Vector3 (0f, Input.GetAxisRaw ("Vertical") * moveSpeed * Time.deltaTime, 0f));
}
//Variables for the animator to use as params
anim.SetFloat ("MoveX", Input.GetAxisRaw ("Horizontal"));
anim.SetFloat ("MoveY", Input.GetAxisRaw ("Vertical"));
}
void FlipHorizontal()
{
animator.transform.Rotate(0, 180, 0);
}
You could also do that on transform itself (without animator). But in that case rotation value can be overriden by animator
This is how I did it - almost the same as the other technique by Jestus with unity script.
var facing : String = "right";
function updateFacing(curr : String){
if(curr != facing){
facing = curr;
var theScale : Vector3 = gameObject.transform.localScale;
theScale.x *= -1;
gameObject.transform.localScale = theScale;
}
}
//put to use
function controls(){
if(Input.GetKey (KeyCode.LeftArrow)){
updateFacing("left");
} else if(Input.GetKey (KeyCode.RightArrow)){
updateFacing("right");
}
}
If you're animating in Unity:
Copy all frames (sprites) of the animation that you want to flip over.
Paste those frames into your new animation and select everything on the first frame.
Change the x scale of the first frame from 1 to -1.
Do the same thing with the very last frame of your animation.
Now it should play facing the other direction!
This is my C# implementation. It uses a string as the direction facing to make it a little easier to debug.
public string facing = "right";
public string previousFacing;
private void Awake()
{
previousFacing = facing;
}
void Update()
{
// store movement from horizontal axis of controller
Vector2 move = Vector2.zero;
move.x = Input.GetAxis("Horizontal");
// call function
DetermineFacing(move);
}
// determine direction of character
void DetermineFacing(Vector2 move)
{
if (move.x < -0.01f)
{
facing = "left";
}
else if (move.x > 0.01f)
{
facing = "right";
}
// if there is a change in direction
if (previousFacing != facing)
{
// update direction
previousFacing = facing;
// change transform
gameObject.transform.Rotate(0, 180, 0);
}
}