so as my previous threads show, I am creating a gameObject from sprites images at runtime using this code:
tex = Resources.Load<Texture2D>("pig") as Texture2D;
Sprite sprite = new Sprite();
sprite = Sprite.Create(tex, new Rect(0, 0, 250, 150), new Vector2(0.5f, 0.5f));
GameObject newSprite = new GameObject();
newSprite.AddComponent<Rigidbody2D>();
newSprite.GetComponent<Rigidbody2D>().gravityScale = 0f;
newSprite.AddComponent<ObjectMovement>();
newSprite.AddComponent<SpriteRenderer>();
SR = newSprite.GetComponent<SpriteRenderer>();
SR.sprite = sprite;
As you see I added a script "ObjectMovement", I want to check in this script if someone is dragging this particular gameObject and if so, make it follow the touch position, just to mention - this game is 2D. I never used RaysorRaycast so I am not sure where I gone wrong. Anyway here is my script code:
public SpriteRenderer selection=null;
void Update()
{
if (Input.touchCount >= 1)
{
foreach (Touch touch in Input.touches)
{
Ray ray = Camera.main.ScreenPointToRay(touch.position);
RaycastHit hit;
switch (touch.phase)
{
case TouchPhase.Began:
if (Physics.Raycast(ray, out hit, 100))
selection = hit.transform.gameObject.GetComponent<SpriteRenderer>();
break;
case TouchPhase.Moved:
selection.transform.position = new Vector2(selection.transform.position.x + touch.position.x / 10, selection.transform.position.y + touch.position.y / 10);
break;
case TouchPhase.Ended:
selection = null;
break;
}
}
}
}
So basically - when touching the screen, fire a ray and check which gameObject is in this position, when moving the finger make it follow it. Drag and drop. Thanks.
EDIT: I noticed the script is attached to every gameObject which is not effective, any ideas?
For 2D, you use RaycastHit2D and Physics2D.Raycast instead of RaycastHit and Physics.Raycast. Those are for 3D. Secondly, Make sure to attach a collider to the Sprite. Since this is a 2D game, the collider must have word "2D" in it. For example, Box Colider 2D from the Editor. You can also use Circle Collider 2D.
I noticed the script is attached to every gameObject which is not
effective, any ideas?
Just create an empty GameObject and attach that script to it. That's it.
Here is fixed version of your code:
float tempZAxis;
public SpriteRenderer selection;
void Update()
{
Touch[] touch = Input.touches;
for (int i = 0; i < touch.Length; i++)
{
Vector2 ray = Camera.main.ScreenToWorldPoint(Input.GetTouch(i).position);
RaycastHit2D hit = Physics2D.Raycast(ray, Vector2.zero);
switch (touch[i].phase)
{
case TouchPhase.Began:
if (hit)
{
selection = hit.transform.gameObject.GetComponent<SpriteRenderer>();
if (selection != null)
{
tempZAxis = selection.transform.position.z;
}
}
break;
case TouchPhase.Moved:
Vector3 tempVec = Camera.main.ScreenToWorldPoint(touch[i].position);
tempVec.z = tempZAxis; //Make sure that the z zxis never change
if (selection != null)
{
selection.transform.position = tempVec;
}
break;
case TouchPhase.Ended:
selection = null;
break;
}
}
}
That would only work on mobile but not on the Desktop Build. I suggest you implement IBeginDragHandler, IDragHandler, IEndDragHandler and override the functions that comes with them. Now, it will work with both mobile and desktop platforms.
Note: For the second solution you have to attach the script below to all Sprites you want to drag unlike the first script above.
using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using UnityEngine.EventSystems;
public class Dragger : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
{
Camera mainCamera;
float zAxis = 0;
Vector3 clickOffset = Vector3.zero;
// Use this for initialization
void Start()
{
//Comment this Section if EventSystem system is already in the Scene
addEventSystem();
mainCamera = Camera.main;
mainCamera.gameObject.AddComponent<Physics2DRaycaster>();
zAxis = transform.position.z;
}
public void OnBeginDrag(PointerEventData eventData)
{
clickOffset = transform.position - mainCamera.ScreenToWorldPoint(new Vector3(eventData.position.x, eventData.position.y, zAxis));
}
public void OnDrag(PointerEventData eventData)
{
//Use Offset To Prevent Sprite from Jumping to where the finger is
Vector3 tempVec = mainCamera.ScreenToWorldPoint(eventData.position) + clickOffset;
tempVec.z = zAxis; //Make sure that the z zxis never change
transform.position = tempVec;
}
public void OnEndDrag(PointerEventData eventData)
{
}
//Add Event Syste to the Camera
void addEventSystem()
{
GameObject eventSystem = new GameObject("EventSystem");
eventSystem.AddComponent<EventSystem>();
eventSystem.AddComponent<StandaloneInputModule>();
}
}
Related
Hello everyone beginner here, i am working on the moving vehicle challenge and i could make the camera follow the truck and also could make the camera switch between views (driver view/back view) the problem is when i switch to back view the initial x rotation for the camera is set to 0 so i want the camera to follow the player x orientation when in driver view so i don't lose the back view orientation, you can see my code below and the link for the project package here, Thank you
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class FollowPlayer : MonoBehaviour
{
//Player GameObject variable (the vehicle)
public GameObject player;
//Fixing the camera vertical position
private Vector3 offset = new Vector3(0, 5, -7);
private Vector3 offset2 = new Vector3(0, 2.5f, 0.3f);
private int currentTarget;
public bool camController;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void LateUpdate()
{
camController = Input.GetButtonDown("Fire1");
if (camController) {
if (offset == offset2)
{
currentTarget = 2;
} else
{
currentTarget = 1;
}
switch(currentTarget)
{
case 1:
offset = offset2;
break;
case 2:
offset = new Vector3(0, 5, -7);
break;
}
}
//Offset the camera behind the player by adding to the player's position
transform.position = player.transform.position + offset;
transform.rotation = player.transform.rotation;
Debug.Log(camController);
}
}
I think it would be easier to have multiple cameras and switch between them. So create your 2 cameras, add Parent Constraints
to them and set them up as you need. Then create a script which enables and disables the cameras like this:
using UnityEngine;
public class SwitchCams : MonoBehaviour
{
public GameObject cam1;
public GameObject cam2;
bool isCam1 = true;
void Start(){
cam1.SetActive(true);
cam1.SetActive(false);
}
void Update(){
bool shouldSwitch = Input.GetButtonDown("Fire1");
if(shouldSwitch){
isCam1 = !isCam1;
cam1.SetActive(isCam1);
cam2.SetActive(!isCam1);
}
}
}
For some reason in unity the easiest way to switch between cameras is to enable and disable them. So this script just does that.
Remember to drag your cameras into the slots cam1 and cam2 of the script in the inspector.
Here is the Code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class RaycastControl : MonoBehaviour
{
LineRenderer line;
private Vector3 zeros;
public LayerMask EnemyLayer;
// Start is called before the first frame update
void Start()
{
line = GetComponent<LineRenderer>();
zeros = new Vector3(0f, 0f, 0f);
}
// Update is called once per frame
void Update()
{
if (Input.GetButtonDown("Fire1"))
{
Debug.Log("Detected the click");
Vector3 mouse = mouseToWorld(Input.mousePosition);
Ray ray = new Ray(zeros, mouse);
RaycastHit hitData;
if (Physics.Raycast(ray, 10000, EnemyLayer))
{
Vector3[] linePos = new Vector3[] { transform.position, mouse };
line.SetPositions(linePos);
Debug.Log("You've hit a Zomboid!");
}
}
}
public Vector3 mouseToWorld(Vector3 mousePos)
{
mousePos = Input.mousePosition;
mousePos.z = Camera.main.nearClipPlane;
Vector3 mouse = Camera.main.ScreenToWorldPoint(mousePos);
mouse.z = 0f;
return mouse;
}
}
Note: I'm using Unity2d
I'm trying to use 0,0,0 and the location of my mouse to cast a ray starting from 0,0,0 and running through the mouse location on to the specified max distance in if(physics.Raycast(ray,maxDistance,EnemyLayer)). this, however, does not work. When I click on or behind the "Zombie" object I've created, I dont get a raycast hit detected.
I've been sure to make sure that the layer mask set in this script is the same one set in the Zombie object. My Debug.Log("You've made it this far!"); line activates so I know the Script is in the scene and is being read, but the Physics.Raycast(ray,10000,EnemyLayer)) NEVER returns true, and we know this because Debug.Log("You've hit a Zomboid!") never shows up in console.
Note: The object this script is attached to, Center, sits at 0,0,0. its transform.position = 0,0,0
Your help is greatly appreciated.
Physics and Physics2D are separate in Unity and don't interact with each other.
Physics2D.Raycast() belongs to Physics2D and only responds to Physics2D (BoxCollider2D, CircleCollider2D, PolygonCollider2D, etc.)
Physics.Raycast() belongs to Physics and only responds to Physics (BoxCollider, SphereCollider, MeshCollider, etc.)
You are using Physics.Raycast() when you should be using Physics2D.Raycast().
This is how you would do it:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class RaycastControl : MonoBehaviour
{
LineRenderer line;
//private Vector3 zeros;
public LayerMask EnemyLayer;
// Start is called before the first frame update
void Start()
{
line = GetComponent<LineRenderer>();
//zeros = new Vector3(0f, 0f, 0f); not necessary this is the same as Vector3.zero
}
// Update is called once per frame
void Update()
{
if (Input.GetButtonDown("Fire1"))
{
Debug.Log("Detected the click");
RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
if (hit)
{
Vector3[] linePos = new Vector3[] { transform.position, hit.point};
line.SetPositions(linePos);
Debug.Log("You've hit a Zomboid!");
}
}
}
}```
/*I am making a 2d game in Unity that works similarly to billiards, but with other aspects. When the player holds down button 0, a line drags away from the ball to show the direction and speed the ball will be hit off in. I don't know how to set that velocity or how to add a force like that.
I've tried setting the velocity directly, then adding fake frictions, but that didn't work too well. I also tried adding a force to the ball, and also making an empty game object that follows the pointer with a point effecter to repel the ball. But I cant seem to get anything to work.
--Also I apologize for the messy code, i'm still kinda new to this
*/
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class LineDrawer : MonoBehaviour
{
public Transform tr; //this is the transform and rigid body 2d of the
ball
public Rigidbody2D rb;
public LineRenderer line; // the line rendered is on the ball
public float hitForce = 10;
// Start is called before the first frame update
void Start()
{
line = GetComponent<LineRenderer>();
line.SetColors(Color.black, Color.white);
}
// Update is called once per frame
void FixedUpdate()
{
line.SetPosition(0, tr.position - new Vector3(0, 0, 0));
if (Input.GetMouseButton(0)&&PlayerPrefs.GetInt("Moving")==0)
{
line.SetWidth(.25f, .25f);
line.SetPosition(1, Camera.main.ScreenToWorldPoint(Input.mousePosition));
float len = Vector2.Distance(line.GetPosition(0), line.GetPosition(1)); //this is for determining the power of the hit
}
else
{
line.SetWidth(0, 0); //make the line invisible
}
if (Input.GetMouseButtonUp(0) && (PlayerPrefs.GetInt("Moving")==0))
{
Vector2.Distance(Input.mousePosition, tr.position)*100;
Debug.Log("Up");
rb.velocity = //this is what i cant work out
PlayerPrefs.SetInt("Moving", 1);
}
}
}
//5 lines from the bottom is where i'm setting the velocity.
Just rewrite your script to the following:
using UnityEngine;
public class Ball : MonoBehaviour
{
private LineRenderer line;
private Rigidbody2D rb;
void Start()
{
line = GetComponent<LineRenderer>();
rb = GetComponent<Rigidbody2D>();
}
void Update()
{
line.SetPosition(0, transform.position);
if (Input.GetMouseButton(0))
{
line.startWidth = .05f;
line.endWidth = .05f;
line.SetPosition(1, Camera.main.ScreenToWorldPoint(Input.mousePosition));
}
else
{
line.startWidth = 0;
line.endWidth = 0;
}
if (Input.GetMouseButtonUp(0))
{
Vector2 direction = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
direction.Normalize();
rb.AddForce(direction * 3f, ForceMode2D.Impulse);
}
}
}
using UnityEngine;
using System.Collections;
using System;
public class TurretScript : MonoBehaviour
{
public float rangeToPlayer;
public GameObject bullet;
// public GameObject spherePrefab;
private GameObject player; // Tag for DynamicWaypointSeek
private bool firing = false; //Firing status
private float fireTime; // Fire Time
private float coolDown = 1.00F; // Time to cool down fire
private int health = 5; //Health of turret
private bool bDead;
private Action cur;
void Start()
{
player = GameObject.FindWithTag("Player");
bDead = false;
}
void Update()
{
if (PlayerInRange())
{ // PlayerInRange is bool function defined at the end
transform.LookAt(player.transform.position); //Rotates the transform (weapon) so the forward vector points at /target (Player)/'s current position
RaycastHit hit;
if (Physics.SphereCast(transform.position, 0.5F, transform.TransformDirection(Vector3.forward), out hit))
{ //The center of the sphere at the start of the sweep,The radius of the sphere,The direction into which to sweep the sphere.
if (hit.transform.gameObject.tag == "Player")
{ //information in hit (only interested in "Player")
if (firing == false)
{
firing = true;
fireTime = Time.time; //keep the current time
GameObject bul;
Quaternion leadRot = Quaternion.LookRotation(player.transform.position); //Calculate the angular direction of "Player";
bul = Instantiate(bullet, transform.position, leadRot) as GameObject; // existing object to be copied, Position of Copy, Orientation of Copy
//Destroy(bullet, 2.0f);
}
}
}
}
if (firing && fireTime + coolDown <= Time.time) // prvious time stored in fireTime + cool down time is less --> means the firing must be turn off
firing = false;
// Destroy(GameObject.FindGameObjectWithTag("Bullet"));
if (health <= 0)
cur = Deadstate;
}
protected void Deadstate()
{
if (!bDead)
{
bDead = true;
Explode();
}
}
void Explode()
{
Destroy(gameObject, 1.5f);
}
bool PlayerInRange()
{
return (Vector3.Distance(player.transform.position, transform.position) <= rangeToPlayer); //Vector3.Distance(a,b) is the same as (a-b).magnitude.
}
void OnTriggerEnter(Collider col)
{
HealthBarScript.health -= 10f;
}
}`
This is code I wrote for a enemy turret in my current unity project. The idea is that it will fire a bullet at the player once it's in range and stop when it's out of range and when the bullet collides with the player, the player will take damage, but I'm struggling to figure out why the bullet won't do any damage. Thoughts? Very much appreciate the help!
According to my experience: bullet speed may be too fast to detect collision.
Imagine that in 2d:
frame 1:
.BB.......OOO......
frame 2:
........BBOOO......
frame 3:
..........OOO..BB..
Where OOO is your object and BB is your bullet.
To fix this you can have a bigger collider for the bullet. Other workaround like "dynamic" collider are also possible.
Created new script
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class mouseDrag : MonoBehaviour
{
float distance = 10;
void OnMouseDrag()
{
Vector3 mousePosition = new Vector3(Input.mousePosition.x, Input.mousePosition.y, distance);
Vector3 objPosition = Camera.main.ScreenToWorldPoint(mousePosition);
transform.position = objPosition;
}
}
Then in another script in the Start function i'm creating 4 cubes and add the mouseDrag to each cube. But when running and clicking and dragging nothing happen. I'm not getting any errors or exceptions.
void Start()
{
lp = gameObjectToRaise.transform.localPosition;
ls = gameObjectToRaise.transform.localScale;
List<GameObject> cubes = new List<GameObject>();
GameObject cube = Cube.CreatePrimitive(Cube.CubePivotPoint.UPLEFT);
GameObject cube1 = Cube.CreatePrimitive(Cube.CubePivotPoint.UPRIGHT);
GameObject cube2 = Cube.CreatePrimitive(Cube.CubePivotPoint.BACKUP);
GameObject cube3 = Cube.CreatePrimitive(Cube.CubePivotPoint.UPRIGHT);
cubes.Add(cube);
cubes.Add(cube1);
cubes.Add(cube2);
cubes.Add(cube3);
cube.GetComponentInChildren<Renderer>().material.color = Color.blue;
cube1.GetComponentInChildren<Renderer>().material.color = Color.red;
cube2.GetComponentInChildren<Renderer>().material.color = Color.green;
cube3.GetComponentInChildren<Renderer>().material.color = Color.yellow;
cube.transform.position = new Vector3(lp.x, lp.y, lp.z - 0.5f);
cube1.transform.position = new Vector3(lp.x, lp.y, lp.z);
cube2.transform.position = new Vector3(lp.x, lp.y, lp.z + 5);
cube3.transform.position = new Vector3(lp.x + 5, lp.y, lp.z);
cube1.transform.Rotate(0, 90, 0);
cube3.transform.Rotate(0, 90, 0);
StartCoroutine(scaleCube(cube.transform));
StartCoroutine(scaleCube(cube1.transform));
StartCoroutine(scaleCube(cube2.transform));
StartCoroutine(scaleCube(cube3.transform));
foreach (GameObject go in cubes)
{
go.AddComponent<mouseDrag>();
}
}
IEnumerator scaleCube(Transform trans)
{
while (raiseAmount < raiseTotal)
{
raiseAmount += 1f;
trans.localScale += new Vector3(speed * Time.deltaTime, speed * Time.deltaTime, 0);
yield return null;
}
}
}
I just tried now with a single cube gameobject i added for testing it
and it's working fine. But when i'm using the cubes using the CUBE
class helper it's not working.
In this case, the mouseDrag script should be attached to the child cube(not the CubeHolder object).After that, you should be moving the parent of the cube which is "CubeHolder".
If you ever move the child cube, you will break the pivot point.
Simply change
transform.position = objPosition;
to
transform.parent.position = objPosition;
then attach the mouseDrag script to the child cube not the "CubeHolder".
Maybe the problem is that it's attaching the script to the
parentObject "CubeHolder" and not to the created cubes ?
Yes. OnMouseDrag will only be called if attached to an Object with a Collider and the child cube is the only object with the Collider. The parent object is only there to be used as a pivot point feature.
NOTE:
You should not use OnMouseDrag for this. You should be dragging the cube/Object with the new UI event. There are many of the callback functions listed in this answer.
The script below is something you should be using. Attach the CubeDrag sctipt to the child cube then change everything that says transform.position to transform.parent.position.
using UnityEngine;
using UnityEngine.EventSystems;
public class CubeDrag: MonoBehaviour, IPointerDownHandler, IDragHandler, IEndDragHandler
{
Camera mainCamera;
float zAxis = 0;
Vector3 clickOffset = Vector3.zero;
// Use this for initialization
void Start()
{
addEventSystem();
zAxis = transform.position.z;
}
public void OnPointerDown(PointerEventData eventData)
{
Vector3 tempPos = eventData.position;
tempPos.z = Vector3.Distance(transform.position, Camera.main.transform.position);
clickOffset = transform.position - mainCamera.ScreenToWorldPoint(tempPos);
Debug.Log("Mouse Down");
}
public void OnDrag(PointerEventData eventData)
{
Vector3 tempPos = eventData.position;
tempPos.z = Vector3.Distance(transform.position, Camera.main.transform.position);
Vector3 tempVec = mainCamera.ScreenToWorldPoint(tempPos) + clickOffset;
tempVec.z = zAxis;
transform.position = tempVec;
Debug.Log("Dragging Cube");
}
public void OnEndDrag(PointerEventData eventData)
{
}
void addEventSystem()
{
mainCamera = Camera.main;
if (mainCamera.GetComponent<PhysicsRaycaster>() == null)
mainCamera.gameObject.AddComponent<PhysicsRaycaster>();
EventSystem eveSys = GameObject.FindObjectOfType(typeof(EventSystem)) as EventSystem;
if (eveSys == null)
{
GameObject tempObj = new GameObject("EventSystem");
eveSys = tempObj.AddComponent<EventSystem>();
}
StandaloneInputModule stdIM = GameObject.FindObjectOfType(typeof(StandaloneInputModule)) as StandaloneInputModule;
if (stdIM == null)
stdIM = eveSys.gameObject.AddComponent<StandaloneInputModule>();
}
}