Develop Reference

Why my Input touch code doesn't work on AR Foundation?

Trying to build an AR app where I can have a number of input touch like drag, rotate, scale, double tap to event, hold on object to event etc.
Everything works fine in a test scene I have built [not AR].
Once included the code in my AR placedOnPlane prefab [template scene - place on plane], once I touch the object, it disappears, and I cannot figure out what I am doing wrong!
Finally, I took advantage of LeanTouch and everything works fine (why? because it's a badass asset), but I usually hate using assets when I have my code that is working equally good and I spent days on it! Some help please.
I tried commenting out the built in drag function in the PlacedOnPlane code that comes with the scene of ARfoundation but it didn't work.
using UnityEngine;
using System.Collections;
using UnityEngine.iOS;
public class InputTouchUnity : MonoBehaviour
{
private Vector3 position;
private float width;
private float height;
public float speedDrag= 0.1f;
float initialFingersDistance;
float speedTwist = -4000f;
private float baseAngle = 0.0f;
Vector3 initialScale;
// scale clamp
//public float scalingSpeed = 0.03f;
public Vector3 min = new Vector3(292f, 292f, 292f);
public Vector3 max = new Vector3(800f, 800f, 800f);
// int tapCount;
// float doubleTapTimer;
void Awake()
{
width = (float)Screen.width / 2.0f;
height = (float)Screen.height / 2.0f;
//Position used for the cube.
position = this.transform.position;
}
void OnGUI() // TO OBSERVE MOTION
{
// Compute a fontSize based on the size of the screen width.
GUI.skin.label.fontSize = (int)(Screen.width / 25.0f);
GUI.Label(new Rect(20, 20, width, height * 0.25f),
"x = " + position.x.ToString("f2") +
", y = " + position.z.ToString("f2"));
}
void Update()
{
// Handle screen touches.
if (Input.touchCount > 0)
{
RaycastHit hit;
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, out hit))
initialScale = transform.localScale;
{
{
{
//DRAG - got rid of it because conflicting the AR drag
Touch touch = Input.GetTouch(0);
Move the cube if the screen has the finger moving.
if (Input.touchCount == 2)
{
if (touch.phase == TouchPhase.Moved)
{
Vector2 pos = touch.position;
pos.x = (pos.x - width) / width;
pos.y = (pos.y - height) / height;
position = new Vector3(transform.position.x + pos.x * speedDrag, 0, transform.position.y + pos.y * speedDrag);
// Position the cube.
transform.position = position;
}
}
//SCALE
if (Input.touchCount == 2)
{
Touch touch1 = Input.GetTouch(0);
if (touch1.phase == TouchPhase.Began)
{
initialFingersDistance = Vector2.Distance(Input.touches[0].position , Input.touches[1].position);
initialScale = transform.localScale;
}
else
{
var currentFingersDistance = Vector2.Distance(Input.touches[0].position, Input.touches[1].position);
var scaleFactor = (currentFingersDistance / initialFingersDistance );
transform.localScale = initialScale * scaleFactor;
Debug.Log(transform.localScale);
GameObject[] models = GameObject.FindGameObjectsWithTag ("ARobject");
newScale.x = Mathf.Clamp(model.localScale.x - scaleFactor, min.x, max.x);
newScale.y = Mathf.Clamp(model.localScale.y - scaleFactor, min.y, max.y);
newScale.z = Mathf.Clamp(model.localScale.z - scaleFactor, min.z, max.z);
model.localScale = newScale;
}
}
//TWIST
if (Input.touchCount == 2)
{
Touch touch2 = Input.GetTouch(0);
if (touch2.phase == TouchPhase.Began)
{
Vector3 pos = Camera.main.WorldToScreenPoint(transform.position);
pos = Input.mousePosition - pos;
baseAngle = Mathf.Atan2(pos.y, pos.x) * Mathf.Deg2Rad;
baseAngle -= Mathf.Atan2(transform.right.y, transform.right.x) * Mathf.Rad2Deg;
}
if (touch2.phase == TouchPhase.Moved)
{
Vector3 pos = Camera.main.WorldToScreenPoint(transform.position);
pos = Input.mousePosition - pos;
float ang = Mathf.Atan2(pos.y, pos.x) * Mathf.Deg2Rad - baseAngle;
transform.rotation = Quaternion.AngleAxis(ang * speedTwist, Vector3.up);
}
}
}
}
}
}
}
}
//}

This is because you are using Physics.Raycast which does't work on AR trackables(Planes) because they don't have any specific geometry associated with them.
So to interact with trackable data unity has provided separate Raycast method that is available in ARRaycastManager in ARFoundation.
In previous version of ARFoundation it was available in ARSessionOrigin. So check which version you are using of Ar Foundation.
You can use it like this
enter code here
`
[SerializeField] ARRaycast​Manager raycastManager;
void Update()
{
if (Input.touchCount == 0)
return;
Touch touch = Input.GetTouch(0);
if (raycastManager.Raycast(touch.position,s_Hits,TrackableType.PlaneWithinPolygon))
{
// Raycast hits are sorted by distance, so the first one
// will be the closest hit.
var hitPose = s_Hits[0].pose;
if (spawnedObject == null)
{
spawnedObject = Instantiate(cube, hitPose.position, hitPose.rotation);
}
else
{
spawnedObject.transform.position = hitPose.position;
}
}
}
`
You can also refer to SimpleAR scene from Ar Foundation sample scenes available here: https://github.com/Unity-Technologies/arfoundation-samples

Unity 2D: How to collide with side of screen

I'm working currently at a 2D Game for Android. There is a player in my scene and if the user tilts his device the player Object is moving on the ground. But he is just moving out of the screen at the left and the right side. I tried to make a "wall" but I had no success. At my player-Gameobject there is an edge collider. Now my question is: how can my player gameobject collide with the side of the screen?
This is my code:
public GameObject player;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
Vector3 dir = Vector3.zero;
dir.y = Input.acceleration.x;
player.transform.Translate(new Vector2(dir.y, 0) * Time.deltaTime * 2000f);
}
Thank you very much! :)
Jul
EDIT:
Image 1 is my Wall's and Image 2 my Player's.
I'm trying to solve it with a wall at the side of the screen. These are the images of
Solved
Solution code:
Vector3 position = player.transform.position;
translation = Input.acceleration.x * movementSpeed * 50f;
if (player.transform.position.x + translation < LeftlimitScreen)
{
position.x = -LeftlimitScreen;
}
else if(transform.position.x + translation > RightlimitScreen)
{
position.x = RightlimitScreen;
}
else
{
position.x += translation;
player.transform.position = position;
}
This code is working for me! :)

This will generate edge colliders around the screen (for 2d):
void GenerateCollidersAcrossScreen()
{
Vector2 lDCorner = camera.ViewportToWorldPoint(new Vector3(0, 0f, camera.nearClipPlane));
Vector2 rUCorner = camera.ViewportToWorldPoint(new Vector3(1f, 1f, camera.nearClipPlane));
Vector2[] colliderpoints;
EdgeCollider2D upperEdge = new GameObject("upperEdge").AddComponent<EdgeCollider2D>();
colliderpoints = upperEdge.points;
colliderpoints[0] = new Vector2(lDCorner.x, rUCorner.y);
colliderpoints[1] = new Vector2(rUCorner.x, rUCorner.y);
upperEdge.points = colliderpoints;
EdgeCollider2D lowerEdge = new GameObject("lowerEdge").AddComponent<EdgeCollider2D>();
colliderpoints = lowerEdge.points;
colliderpoints[0] = new Vector2(lDCorner.x, lDCorner.y);
colliderpoints[1] = new Vector2(rUCorner.x, lDCorner.y);
lowerEdge.points = colliderpoints;
EdgeCollider2D leftEdge = new GameObject("leftEdge").AddComponent<EdgeCollider2D>();
colliderpoints = leftEdge.points;
colliderpoints[0] = new Vector2(lDCorner.x, lDCorner.y);
colliderpoints[1] = new Vector2(lDCorner.x, rUCorner.y);
leftEdge.points = colliderpoints;
EdgeCollider2D rightEdge = new GameObject("rightEdge").AddComponent<EdgeCollider2D>();
colliderpoints = rightEdge.points;
colliderpoints[0] = new Vector2(rUCorner.x, rUCorner.y);
colliderpoints[1] = new Vector2(rUCorner.x, lDCorner.y);
rightEdge.points = colliderpoints;
}

You can place in your scene, outside of the region which will be displayed in your device 2 empty game objects with a collider, so the player will crash against them.
You can also limit by code the boundaries within the player can move. You apply this using Mathf.Clamp(), and there you will need to set the boundaries in the x coordinate for your scene.
You will see that instead of modifying the position of the player using its transform, we use the rigidbody instead.
public class PlayerController : MonoBehaviour
{
public float speed;
public float tilt;
public Boundary boundary;
void FixedUpdate ()
{
float moveHorizontal = Input.GetAxis ("Horizontal");
float moveVertical = Input.GetAxis ("Vertical");
Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
rigidbody.velocity = movement * speed;
rigidbody.position = new Vector3
(
Mathf.Clamp (rigidbody.position.x, boundary.xMin, boundary.xMax),
0.0f,
5.0f
);
}
}
You can check the whole tutorial here: https://unity3d.com/earn/tutorials/projects/space-shooter/moving-the-player?playlist=17147
Update Other options:
//You select here the speed you consider
float speed = 1.0f;
void Update () {
Vector3 dir = Vector3.zero;
float InputValue = Input.acceleration.x * speed;
//You need to set the values for this limits (max and min) based on your scene
dir.y = Mathf.Clamp(InputValue, 0.5f, 50.5f);
player.transform.position = dir;
}
Update 2:
Without Clamp, just setting the limits on the script
void Update () {
Vector3 position = player.transform.position ;
translation = Input.acceleration.x * speed;
if( player.transform.position.y + translation < leftLimitScreen )
position.y = -leftLimitScreen ;
else if( myTransform.position.x + translation > rightLimitScreen )
position.y = rightLimitScreen ;
else
position.y += translation ;
player.transform.position = position ;
}

In a prototype i'm creating the solution i had arrived was creating "walls" with objects without sprites in the borders and checking if there is something there with Raycast with a script like this:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerController : MonoBehaviour {
RaycastHit2D[] hit;
Vector2[] directions;
private Vector2 targetPosition;
private float moveSpeed;
private float moveHDir;
private float wallPos;
private bool hitLeft;
private bool hitRight;
// Use this for initialization
void Start () {
directions = new Vector2[2] {Vector2.right, Vector2.left};
hitLeft = false;
hitRight = false;
}
// Update is called once per physics timestamp
void FixedUpdate () {
foreach (Vector2 dir in directions) {
hit = Physics2D.RaycastAll(transform.position, dir);
Debug.DrawRay(transform.position, dir);
if (hit[1].collider != null) {
// Keyboard control
if (Input.GetAxisRaw("Horizontal") != 0) {
moveHDir = Input.GetAxisRaw("Horizontal");
// I have found that a 5% of the size of the object it's a
// good number to set as a minimal distance from the obj to the borders
if (hit[1].distance <= (transform.localScale.x * 0.55f)) {
if (dir == Vector2.left) {
hitLeft = true;
} else {
hitRight = true;
}
wallPos = hit[1].collider.transform.position.x;
// Condition that guarantee that the paddle do not pass the borders of the screen
// but keeps responding if you try to go to the other side
if ((wallPos > this.transform.position.x && moveHDir < 0) ||
(wallPos < this.transform.position.x && moveHDir > 0)) {
moveSpeed = gControl.initPlayerSpeed;
} else {
moveSpeed = 0;
}
} else {
if (dir == Vector2.left) {
hitLeft = false;
} else {
hitRight = false;
}
if (!hitRight && !hitLeft)
{
moveSpeed = gControl.initPlayerSpeed;
}
}
}
}
}
targetPosition = new Vector2((transform.position.x + (moveSpeed * moveHDir)), transform.position.y);
}
}
Maybe it's not the best solution or the shortest one, but it's working wonders to me.
Good luck.

In case if you want to generate collider on the borders of the canvas (2D)
Attach this script in the main canvas object.
using UnityEngine;
public class BorderCollider: MonoBehaviour
{
private EdgeCollider2D _edgeCollider2D;
private Rigidbody2D _rigidbody2D;
private Canvas _canvas;
private float y, x;
private Vector2 _topLeft, _topRight, _bottomLeft, _bottomRight;
private void Start() {
//Adding Edge Collider
_edgeCollider2D = gameObject.AddComponent<EdgeCollider2D>();
//Adding Rigid body as a kinematic for collision detection
_rigidbody2D = gameObject.AddComponent<Rigidbody2D>();
_rigidbody2D.bodyType = RigidbodyType2D.Kinematic;
//Assigning canvas
_canvas = GetComponent<Canvas>();
GetCanvasDimension(); // Finds height and width fo the canvas
GetCornerCoordinate(); // Finds co-ordinate of the corners as a Vector2
DrawCollider(); // Draws Edge collide around the corners of canvas
}
public void GetCornerCoordinate() {
// Assign corners coordinate in the variables
_topLeft = new Vector2(-x,y); // Top Left Corner
_topRight = new Vector2(x,y); // Top Right Corner
_bottomLeft = new Vector2(-x,-y); // Bottom Left Corner
_bottomRight = new Vector2(x,-y); // Bottom Right Corner
}
void GetCanvasDimension(){
y = (_canvas.GetComponent<RectTransform>().rect.height) / 2;
x = (_canvas.GetComponent<RectTransform>().rect.width) / 2;
}
void DrawCollider() {
_edgeCollider2D.points = new[] {_topLeft, _topRight, _bottomRight, _bottomLeft,_topLeft};
}
}

Unity Prefab won't instantiate into the game scene

Having a bit of trouble with unity. I have had two different builds for firing and movement systems, now I am porting them together although I encounter some issues when I do this. The 'bullet' prefab in the assets folder is asked to be spawned into the game scene but never is. But what is more intriguing is the other functions of the 'bullet' and script take place, so it is only the prefab not showing in the scene.
THe following is the code from the script which instaniates the prefab:
public bool isFiring; // Boolean to check if the player is firing
public bool isReloading = false; // Boolean to check if the player is reloading
public BulletController bullet; // Reference another script
public float bulletSpeed; // bullet speed - changed in bullet controller
public float timeBetweenShots; // time between shots can be fired
private float shotCounter; // Tempoary time holder - ensures no bullet spam
public Transform firePoint; // The fire point in the game attached to the gun
public static int ammoRemaining = 3; // Ammo left for the player to fire
public static int maxAmmo = 3;
public Text ammoText;
public Rigidbody cannonballInstance;
public BulletController projectile;
[Range(10f, 80f)]
public float angle = 45f;
// Use this for initialization
void Awake () {
isReloading = false;
timeBetweenShots = 0.3f;
ammoRemaining = maxAmmo;
}
// Update is called once per frame
void Update () {
if (ammoRemaining == 0 && isReloading == false)
{
StartCoroutine(Reload());
}
else if (isFiring == true && isReloading == false)
{
shotCounter -= Time.deltaTime;
if(shotCounter <= 0 && ammoRemaining > 0 && isReloading == false)
{
shotCounter = timeBetweenShots;
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hitInfo;
if (Physics.Raycast(ray, out hitInfo))
{
FireCannonAtPoint(hitInfo.point);
}
ammoRemaining -= 1;
ammoText.text = "Ammo:" + ammoRemaining;
}
}
else if (Input.GetKey(KeyCode.R))
{
StartCoroutine(Reload());
}
else
{
shotCounter = 0;
}
}
private void FireCannonAtPoint(Vector3 point)
{
Vector3 randomAccuracy;
randomAccuracy = new Vector3(Random.Range(-2.0f, 2f), 0, Random.Range(-2f, 2f));
var velocity = BallisticVelocity(point + randomAccuracy, angle);
Debug.Log("Firing at " + (point + randomAccuracy) + " velocity " + velocity);
Rigidbody rg = Instantiate(cannonballInstance, transform.position, transform.rotation);
Debug.Log("Firing at" + transform.position);
Debug.Log(rg.transform);
BulletController newProjectile = rg.GetComponent<BulletController>();
newProjectile.speed = velocity;
Debug.Log(newProjectile.speed);
// cannonballInstance.transform.position = transform.position ;
// cannonballInstance.velocity = velocity;
}
private Vector3 BallisticVelocity(Vector3 destination, float angle)
{
Vector3 direction = destination - transform.position; // get Target Direction
float height = direction.y; // get height difference
direction.y = 0; // retain only the horizontal difference
float distance = direction.magnitude; // get horizontal direction
float AngleRadians = angle * Mathf.Deg2Rad; // Convert angle to radians
direction.y = distance * Mathf.Tan(AngleRadians); // set direction to the elevation angle.
distance += height / Mathf.Tan(AngleRadians); // Correction for small height differences
// Calculate the velocity magnitude
float velocity = Mathf.Sqrt(distance * Physics.gravity.magnitude / Mathf.Sin(2 * AngleRadians));
Debug.Log(velocity);
return velocity * direction.normalized; // Return a normalized vector.
}
public IEnumerator Reload()
{
isReloading = true;
ammoText.text = "REL...";
yield return new WaitForSeconds(2);
ammoRemaining = maxAmmo;
isReloading = false;
ammoText.text = "Ammo:" + ammoRemaining;
}
}
Everything is the same in the two seperate version but it just the spawning in of the prefab which doesn't work.
Any ideas/suggestions are much appreciated.

From your code:
public Rigidbody cannonballInstance;
[...]
Rigidbody rg = Instantiate(cannonballInstance, transform.position, transform.rotation);
You are Instantiating a Rigidbody where I think you expect to instantiate a GameObject
try with:
Rigidbody rg = Instantiate(cannonballInstance.gameObject, transform.position, transform.rotation).GetComponent<Rigidbody>();

Unity3D : make cylinder stretch from one point to another

I'd like, at each frame, to move, scale and rotate a given cylinder so that it behaves like a 'rope' between two points.
I have this code at the moment, but it doesn't work at all like intended :
hook.transform.position = (rightHandPosition + hookDestination)/2;
hook.transform.localScale = new Vector3(0.5F, Vector3.Magnitude(hookDestination - rightHandPosition), 0.5F);
hook.transform.rotation = Quaternion.Euler(hookDestination - rightHandPosition);
As you can guess the two points are rightHandPosition and hookDestination. For now, the cylinder spawns at 'random' locations, with 'random' rotations and enormous scales.
How can I fix it ?
"Full" script :
public class FirstPersonController : MonoBehaviour {
public GameObject hook;
bool isHooked = false;
Vector3 hookDestination;
Vector3 rightHandPosition;
void Start() {
hook.renderer.enabled = false;
rightHandPosition = hook.transform.position;
}
// Update is called once per frame
void Update () {
if (isHooked) {
hook.transform.position = (rightHandPosition + hookDestination)/2;
hook.transform.localScale = new Vector3(0.5F, Vector3.Magnitude(hookDestination - rightHandPosition), 0.5F);
hook.transform.rotation = Quaternion.Euler(hookDestination - rightHandPosition);
}
if (isHooked && !Input.GetMouseButton(1)) {
isHooked = false;
hook.renderer.enabled = false;
}
if (Input.GetMouseButtonDown (1) && !isHooked) {
Ray ray = GameObject.FindGameObjectWithTag ("MainCamera").camera.ViewportPointToRay (new Vector3 (0.5F, 0.5F, 0));
RaycastHit hit;
if (Physics.Raycast (ray, out hit) && hit.distance < 5000000 && hit.collider.tag != "Player") {
isHooked = true;
hookDestination = hit.point;
hook.renderer.enabled = true;
}
}
}
}
A screenshot of the scene :

fafase's comment was the right answer : use LineRenderer.
hookRender.SetPosition(0, rightHandPosition);
hookRender.SetPosition(1, hookDestination);

Let us assume that cubeStart is the starting point and cubeEnd is the end point. And "cylinder" is your cylinder, then
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class AlignCyl : MonoBehaviour {
GameObject cubeStart;
GameObject cubeEnd;
GameObject cylinder;
Vector3 endV;
Vector3 startV;
Vector3 rotAxisV;
Vector3 dirV;
Vector3 cylDefaultOrientation = new Vector3(0,1,0);
float dist;
// Use this for initialization
void Start () {
cubeStart = GameObject.Find("CubeStart");
cubeEnd = GameObject.Find("CubeEnd");
cylinder = GameObject.Find("Cylinder");
endV = cubeEnd.transform.position;
startV = cubeStart.transform.position;
}
// Update is called once per frame
void Update () {
// Position
cylinder.transform.position = (endV + startV)/2.0F;
// Rotation
dirV = Vector3.Normalize(endV - startV);
rotAxisV = dirV + cylDefaultOrientation;
rotAxisV = Vector3.Normalize(rotAxisV);
cylinder.transform.rotation = new Quaternion(rotAxisV.x, rotAxisV.y, rotAxisV.z, 0);
// Scale
dist = Vector3.Distance(endV, startV);
cylinder.transform.localScale = new Vector3(1, dist/2, 1);
}
}
Tested with Unity3D 2018.1
My concept about rotation is based on quaternions solely.
x=rotAxis.x * sin(angle/2) = rotAxis.x;
y=rotAxis.y * sin(angle/2) = rotAxis.y;
z=rotAxis.z * sin(angle/2) = rotAxis.z;
w = cos(angle/2) = 0;
where rotAxis is the sum of 2 vectors i.e. the default cylinder orientation and the wanted orientation. Angle is 180 degrees because we want the cylinder to rotate around the rotAxis by 180 degrees. It is the definition of quaternion rotation (rotation around an axis).

Jumping at an angle with Unity and C#

I'm working on a project where I'm trying to make my character move by jumping at an angle. Right now during the frame updates, the character will pivot back and forth and when the right key is pressed, they will jump. This code causes them to jump at an angle, but they always return to their original position.
Additionally, I have two characters who start on opposite sides of the stage, but when I start the game they teleport to the same position. I've spent a lot of time reviewing my code but I can't seem to get this to work. Any help you can provide?
using UnityEngine;
using System.Collections;
public class Freg : MonoBehaviour {
public GameObject Tounge;
public float gravity;
public float tempScale = 1;
public float MaxJump = 8f;
public float MinJump = 0.1f;
static float yVector = 0;
static float xVector = 0;
static bool grounded = true;
bool isleft = false;
Vector3 farthestleft;
Vector3 farthestright;
// Use this for initialization
void Start () {
farthestleft = new Vector3 (-33.7f, 50.2f, 24.8f);
farthestright = new Vector3 (22.56f, 54.83f, -15.12f);
}
void OnTriggerEnter (Collider other) {
if (other.GetComponent<Collider> ().tag == "Ground") {
grounded = true;
yVector = 0;
//xVector = 0;
Vector3 onGround = new Vector3 (transform.position.x, -4.86f, transform.position.z);
transform.position = onGround;
} else
grounded = false;
}
// Update is called once per frame
void Update () {
/*if (Input.GetKey (KeyCode.UpArrow) == true) {
Tounge.transform.localScale.Set (1, 0.5f, 1);
} else {
Tounge.transform.localScale.Set (1, 1, 1);
}*/
if (grounded == false) {
yVector -= gravity;
}
if (Input.GetKeyDown (KeyCode.UpArrow) == true && grounded == true) {
MinJump += 0.5f;
} else if (MinJump > 0.1f){
yVector += MinJump;
xVector += MinJump;
MinJump = 0.1f;
grounded = false;
}
Vector3 stuff = new Vector3 (transform.localPosition.y + xVector, transform.position.y + yVector, transform.position.z);
transform.position = stuff;
float t = Mathf.PingPong (Time.time * 0.5f * 2.0f, 1.0f);
transform.eulerAngles = Vector3.Lerp (farthestright, farthestleft, t);
}
}

it looks like you should update the current position during the if statements, rather than after that way on each update, the actual position is moving based on the decision rather than just the end of the loop.