So I got this code to instantiate my gameobject Cannon, witch has a child "ball" attached to it. I'm trying to rotate the "ball" around the "cannon" when I use my left/right arrow keys.
using UnityEngine;
using System.Collections;
public class NewBehaviourScript : MonoBehaviour {
public GameObject Cannon = null;
public float speed = 1.0f;
void Start () {
Cannon = Instantiate (Resources.Load ("Prefabs/Cannon")) as GameObject;
}
// Update is called once per frame
void Update () {
if (Input.GetKey(KeyCode.LeftArrow)){
Cannon.transform.Rotate(Vector3.left * speed * Time.deltaTime);
}
if (Input.GetKey(KeyCode.RightArrow)){
Cannon.transform.Rotate(Vector3.right * speed * Time.deltaTime);
}
}
}
There is no Vector3.left, that would be an inverse of Vector3.right so you would just write that as "-Vector3.right". But regardless, you shouldnt be passing the vector3 of the direction you want to rotate in, but the axis in which you want to rotate around. in this case, you would use Vector3.up for both arguments, and use "* speed" for one, and "* -speed" for the other.
Related
I just started making a game. For whatever reason, the enemy continuously teleports to the origin for no reason. Here is my code so far;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Enemy : MonoBehaviour
{
public float speed = 0.5f;
public Transform target;
void Start()
{
}
// Update is called once per frame
void Update()
{
transform.LookAt(target);
transform.position = transform.forward * speed * Time.deltaTime;
}
}
I have the target object assigned to the player. Someone please help because I can't find a solution anywhere.
This is because transform.forward is a result axis, not a specific location, and gives you numbers around -1 to 1. To fix that just try:
transform.position += transform.forward * speed * Time.deltaTime;
I'm totally new to Unity and game development...I made a 2D object of the car that can move to 8 directions....each direction with the specific animation of the car's movement...Now, how do I make my car move in such a way that if it's moving straight LEFT it shouldn't go immediately straight to RIGHT when turning RIGHT, so I want it to make a proper round turn or a "U TURN" to move towards its opposite direction and obviously the same with UP and DOWN turns....can anyone please help me in at least one way I can fix this?
or the other way to ask this question would be if I'm moving my object to x = -1 direction then on turning to x = 1 it should first go through x = 0 and then x = 1 so that it looks like a turn.
this is the code for my CAR so far..
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class CARmovement : MonoBehaviour
{
public float speed;
private Rigidbody2D myRigidbody;
private Vector3 change;
private Animator animator;
private Vector3 lastMoveDirection;
// Start is called before the first frame update
void Start()
{
animator = GetComponent<Animator>();
myRigidbody = GetComponent<Rigidbody2D>();
}
// Update is called once per frame
void Update()
{
change = Vector3.zero;
change.x = Input.GetAxis("Horizontal");
change.y = Input.GetAxis("Vertical");
UpdateAnimationAndMove();
}
void UpdateAnimationAndMove()
{
if (change != Vector3.zero)
{
MoveCar();
animator.SetFloat("moveX", change.x);
animator.SetFloat("moveY", change.y);
animator.SetBool("driving", true);
}
else
{
animator.SetBool("driving", false);
}
}
void MoveCar()
{
myRigidbody.MovePosition(transform.position + change * speed * Time.deltaTime);
}
}
I try an example of rotating a car. We add an object (here I add a car as an example), select the object (car) to create a C# Script script, double-click to open, we define two variables Speed_move, Speed_rot to control the movement speed and Rotation speed and assign values to them. We use Translate to control the forward and backward movement of the cube through the W and S buttons, forward with forward, and back with back; use Rotate to control the rotation of the object through the A and D buttons, up is the Y-axis rotation. The following is the code for the specific rotation.
if (Input.GetKey(KeyCode.W))
{
this.transform.Translate(Vector3.forward * Time.deltaTime * Speed_move);
}
if (Input.GetKey(KeyCode.S))
{
this.transform.Translate(Vector3.back * Time.deltaTime * Speed_move);
}
if (Input.GetKey(KeyCode.A))
{
this.transform.Rotate(Vector3.up * Time.deltaTime * -Speed_rot);
}
if (Input.GetKey(KeyCode.D))
{
this.transform.Rotate(Vector3.up * Time.deltaTime * Speed_rot);
}
I am trying to make a 2.5D SHMUP type game in which the world continuously moves forward while the player's spaceship and camera stay in place. This means that even if the world is moving, if the player's ship is in the middle of the screen it will stay there.
To do this I've created an empty game object named Moving World and attached the following script to it:
public class movingWorldController : MonoBehaviour
{
private float movementSpeed = 5f;
void Update()
{
transform.position = transform.position + new Vector3(0, 0, movementSpeed * Time.deltaTime);
}
}
I then added the camera and spaceship as children to of this object, and as a result they indeed move with the moving world object. However, I also have a script attached to the spaceship to allows it to move according to the player's input, and if I enable the script above the ship stops responding to the player's input. The ship's script looks like this:
public class ShipController : MonoBehaviour
{
public Rigidbody rb;
public float moveSpeed = 5f;
private Vector3 movement;
void Update()
{
movement.x = Input.GetAxisRaw("Horizontal");
movement.z = Input.GetAxisRaw("Vertical");
}
private void FixedUpdate()
{
rb.MovePosition(rb.position + movement * moveSpeed * Time.deltaTime);
}
}
The ship controller works just fine when the world-moving script is disabled, so I suspect the world script is somehow overwriting the spaceship position. How may I solve this?
For a POC example see this video: https://www.youtube.com/watch?v=-fVjWgfUKn4&t=282s (jump to 4:00 to see the game in action). Note that in the video gamemaker is used to achieve the effect, while I am trying to achieve a similar effect using just code.
I achieved the effect I was aiming for by doing the following. First, I removed the MovingWorld object and instead applied the following script to the camera:
public class movingWorldController : MonoBehaviour
{
public float movementSpeed = 5f;
void FixedUpdate()
{
transform.position = transform.position + new Vector3(0, 0, movementSpeed * Time.deltaTime);
}
}
This will cause the camera to continuously move forward. Next, to make sure the player's ship keeps up with the camera, and is maneuverable at the same time, I applied the following script to the ship's object:
public class ShipController : MonoBehaviour
{
public Rigidbody rb;
private float shipVelocity = 5f;
public float moveSpeed = 10f;
private Vector3 movement;
void Update()
{
movement.x = Input.GetAxisRaw("Horizontal") * moveSpeed;
movement.z = Input.GetAxisRaw("Vertical") * moveSpeed + shipVelocity;
}
private void FixedUpdate()
{
rb.MovePosition(rb.position + movement * Time.deltaTime);
}
}
Two important notes:
The shipVelocity variable was introduced to make sure the ship continues to cruise at camera-speed.
Even though the camera is not a RigidBody its position update must occur during the FixedUpdate method to make sure it moves on the same frame as the ship. Updating it using the Update method will introduce jittering to the ship due to de-synchronization.
I am trying to practice making third person controllers in Unity 3D. I am a beginner, and I am completely baffled on how to make my controller functional. I have been doing hours of research, but no thread I can find seem to answer my question. I have two scripts, a CameraController, and a CharacterController. My code is below.
CameraController:
using UnityEngine;
using System.Collections;
public class CameraController : MonoBehaviour {
public GameObject target;
public float rotationSpeed;
Vector3 offset;
Vector3 CameraDestination;
// Use this for initialization
void Start () {
offset = transform.position - target.transform.position;
CameraDestination = offset + transform.position;
rotationSpeed = 50f;
transform.position = CameraDestination;
}
// Update is called once per frame
void Update () {
transform.LookAt (target.transform.position);
float h = Input.GetAxisRaw ("Horizontal");
transform.RotateAround (target.transform.position, Vector3.up, Time.deltaTime * h * rotationSpeed);
target.transform.Rotate (0f, Time.deltaTime * h * rotationSpeed, 0f);
}
}
CharacterController:
using UnityEngine;
using System.Collections;
public class CharController : MonoBehaviour {
public float playerSpeed = 10f;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
float Vertical = Input.GetAxis("Vertical");
transform.position += transform.forward * Time.deltaTime * playerSpeed * Vertical;
}
}
When either the left or right arrow key is pressed, both the player and the camera rotates. If I try to attach the camera to the player as a children, the camera's rotation becomes messed up, but if I do not attach the camera to the player, the camera stops following the player. If I try to set the camera to a specific position relative to the player, it stops revolving around the player like it is intended to do. I simply can not come up with a method that works.Thank you for answering my question in advance!
When I go about this, I like to have an empty gameObject which has 2 children, the camera and then the mesh of the character.
> CharacterController
> Camera
> CharacterRig
When you want to rotate the character, rotate the CharacterController, then when you want to rotate the Camera around the character, change your code to:
transform.RotateAround (CharacterRig.transform.position, Vector3.up, Time.deltaTime * h * rotationSpeed);
This will allow your camera to rotate irrespective of any character animation and should solve your issue. This is very important if you want to implement animations later, as you don't want to parent the camera to the thing that is being animated because it will move with the animation.
P.s. Your code appears fine. Certain that it is purely the way you have set up the game objects.
I'm making a 2D Tank shooter game, but I got some problems and questions:
I got some problems with collisions.
GIF of a problem here. Go to tank collision problem. (I can't post more than 2 links because of low reputation, so You will have to go to images manualy, sorry.)
I need to make my tank do not do like shown above. I'm using rigidbody on empty parent and box collider on tank body.
My "Tank (root)" in inspector and "tankBody" (hull) in inspector is here.
tank movement code:
using UnityEngine;
using System.Collections;
public class Movement : MonoBehaviour {
public float thrust;
public float rotatingspeed;
public Rigidbody rb;
void Start () {
rb = GetComponent<Rigidbody>();
}
void Update () {
if (Input.GetKey (KeyCode.W)) {
transform.Translate (Vector2.right * thrust);
}
if (Input.GetKey (KeyCode.S)) {
transform.Translate (Vector2.right * -thrust);
}
if(Input.GetKey(KeyCode.A)) {
transform.Rotate(Vector3.forward, rotatingspeed);
}
if(Input.GetKey(KeyCode.D)) {
transform.Rotate(Vector3.forward, -rotatingspeed);
}
}
}
My bullets fly like they are in zero gravity/space. I need them to do not hover like that(I got similar problem before and I couldn't fixed it..). There is gif in first link in 1.st problem.
shooting code:
using UnityEngine;
using System.Collections;
public class Shooting : MonoBehaviour {
public Rigidbody2D projectile;
public float speed = 20;
public Transform barrelend;
void Update () {
if (Input.GetButtonDown("Fire1"))
{
Rigidbody2D rocketInstance;
rocketInstance = Instantiate(projectile, barrelend.position, barrelend.rotation) as Rigidbody2D;
rocketInstance.AddForce(barrelend.right * speed);
}
}
}
I managed to fix my both problems.
To fix problem number 1. I used add force. My new moving forwand and backward looks like this:
if (Input.GetKey (MoveForward)) {
//transform.Translate (Vector2.right * thrust); OLD !!
rb2D.AddForce(transform.right * thrust * Time.deltaTime);
}
if (Input.GetKey (MoveBackward)) {
//transform.Translate (Vector2.right * -thrust); OLD !!
rb2D.AddForce(transform.right * -thrust * Time.deltaTime);
and I had to adjust my mass to a smaller (from 2000 to 1), thrust to a bigger (from 0.2 to 50000) and set drag into 50, angular drag 100.
2nd problem got fixed by setting drag and angular drag into a bigger value. That's it!