Develop Reference

Unity Gaze Input for GearVR

Okay, so, I got the challenge to create a program, in Unity for GearVR.
I have to make a program which makes use of gaze input, so if you stare at an object for several seconds it'll display you a 360* video.
I barely can't find any GearVR Gaze Input tutorials around on the web so I wanted to give it a shot on Stackoverflow, and hopefully someone could help me out! :)

You have to use Physics.Raycast. This method emits a ray from the camera point to the camera orientation. You can use something like that:
// Does the Ray hit an object with a component named MyObjectScript?
RaycastHit hit;
Vector3 fwd = transform.TransformDirection(Vector3.forward);
if (Physics.Raycast(transform.position, fwd, out hit) )
{
var script = hit.transform.GetComponent<MyObjectScript>();
if (script != null)
{
//Do your stuff...
}
}
Simply put this script on your camera in the FixedUpdate method and another script named MyObjectScript in the object you want to detect.

Unity 5: Raycast not finding blocks

Hey guys I've been working on a 2D terraria-like game, from a tutorial I found on Youtube. I've been using Quads as blocks. The link to the series is:
https://www.youtube.com/watch?v=KONw5GX0Ixs
The only difference is I've been in a 2D project rather than a 3D. I'm trying to implement a mining system, but the clicks aren't detected much less the blocks that I'm clicking on. The system doesn't even detect the clicking, much less the blocks I'm clicking on. I'm new to coding so I'm not sure how to fix this, anything helps, thanks.
My code is:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Mining : MonoBehaviour {
public Vector2 direction;
void Update() {
if (Input.GetMouseButtonDown (0)) {
Vector3 c = Camera.main.ScreenToWorldPoint (Input.mousePosition);
RaycastHit2D hit2D = Physics2D.Raycast(this.gameObject.transform.position, direction);
Debug.Log ("hello");
if (hit2D.collider.gameObject != null) {
Debug.Log (hit2D.collider.gameObject);
Destroy (hit2D.collider.gameObject);
}
}
}
}

First of all, change
Input.GetMouseButtonDown(0)
to
Input.GetMouseButton(0)
as its
Returns whether the given mouse button is held down.
tell me if that fix your problem. If not, I will try to figure sth out:)

Unity Multiplayer FPS Client/Server Interaction Problems

I have a simple FPS where a player can fire a gun. I want the clients to see the bullet holes. I am trying to accomplish this by invoking a server side method when the client tries to fire the gun. The server side method should then raycast from the players camera and spawn a bullet hole for everyone to see..
I can get this to work partially by passing the player as a parameter to the server method. However, since my raycasting needs to be done based off the player camera, the bullet holes end up appearing at character height, since it's using the player and not the camera.
It won't allow me to pass a camera through. I have also tried creating an empty game object called bullet spawn and passing that through but I was getting a "object reference not set to instance of an object." This same error seems to surface for any Child element of the player I attempt to pass to the server side method.
I am unsure of the right way to accomplish this.
void Update()
{
if (isLocalPlayer)
{
if (Input.GetButton("Fire1"))
{
CmdFire(BulletSpawn);
}
}
}
[Command]
void CmdFire(GameObject Player)
{
Ray shooterRay = new Ray(Player.transform.position, Player.transform.forward);
if (Physics.Raycast(shooterRay, out Hit, 10000))
{
Debug.Log("player hit");
GameObject Bullet_Hole = (GameObject)Instantiate(BulletHole_Prefab, Hit.point, Quaternion.FromToRotation(Vector3.up, Hit.point));
NetworkServer.Spawn(Bullet_Hole);
}
}

Think about it this way. What is it that you need to fire your weapon? You need the firing point and the firing direction (in your simple case). So try to pass just that information. Your CmdFire should look like void CmdFire(Vector3 firingPoint, Vector3 firingDirection). Remember that when you pass the player gameobject, it gets serialized and sent to the server which causes a lot of unneeded network traffic. Stick to value types and simple objects for commands.
This is what ultimately led me to the solution. Thank you for the advice. I simply passed two Vector3 parameters as you suggested which represent the raycast position and direction. I can now shoot from both client and server and see the bullet holes on both as well. Here is the code that fixed it in case anyone runs into this later on:
void Update() {
if (isLocalPlayer) {
if (Input.GetButton("Fire1")) {
Vector3 FiringSpot = PlayerCam.transform.position;
Vector3 FireDirection = PlayerCam.transform.forward;
CmdFire(FiringSpot, FireDirection);
}
}
}
[Command]
void CmdFire(Vector3 firingPoint, Vector3 firingDirection) {
Ray shooterRay = new Ray(firingPoint, firingDirection);
if (Physics.Raycast(shooterRay, out Hit, 10000)) {
GameObject Bullet_Hole = (GameObject)Instantiate(bullet_Hole_Prefab, Hit.point, Quaternion.FromToRotation(Vector3.up, Hit.point));
NetworkServer.Spawn(Bullet_Hole);
Destroy(Bullet_Hole, 10);
}
}

Host's camera on network game isn't working correctly

So, I'm doing an FPS game in Unity5, and some days ago I started looking at multiplayer tutorials at the official site of Unity.
However, I changed some bit of the code to fit in an FPS, but I had a problem when started doing this. The client's camera moved fine, but the host's one did not: It used the client's camera to see, but his player to move, sort of a third-person view.
All players have the same code, and the camera has a Network Identity with Local Player Authority turned on. Also, it has this C# script:
using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
public class VisionControl : NetworkBehaviour {
void Start () {
Cursor.lockState = CursorLockMode.Locked;
}
void Update () {
if(!isLocalPlayer){
return;
}
transform.Rotate (new Vector3 (-Input.GetAxis ("Mouse Y")*5.0f,0.0f,0.0f));
}
}

Your camera should not have a network identiy.
It is used only by the local clients to get a perspective of the game world, so they do not need to be networked.
Each camera exists on the current client.for the current client only.
Each game instance should have 1 camera running, that of the Local Player.
Attach a simple non-networked camera component to your player prefab and test again.

Fixed! I removed the VisionControl script and putted this one on the player's movement script:
public override void OnStartLocalPlayer ()
{
if (isLocalPlayer) {
FindObjectOfType<Camera> ().gameObject.transform.position = this.transform.position+new Vector3(0f,0.5f,0f);
FindObjectOfType<Camera>().gameObject.transform.SetParent (this.transform);
}
}

Touch not recognized ever in Unity

I have to convert my pong game from keyboard usage to touch based mechanics. However I am completely stuck trying to figure out Unity's touch mechanics. I have searched through the internet and everyone somehow keeps resolving the issue in ways that are still failing for me. Here is, from everything I have gathered, what I believe should work. This is in my update method so it is constantly checking this.
Touch t;
void Update() {
if (Input.touchCount > 0) {
print("touch seen");
t = Input.GetTouch(0);
}
}
The if statement condition is never met no matter how many times I touch the screen. I am using a lenovo laptop that has a touch screen, maybe it is reading my touches as clicks? I just can't seem to figure it out. If I take away the if statement I get an ArrayIndexOutOfBounds Exception. Any help is extremely appreciated!
Update It is registering as a mouse click, and I can't just allow this because I need multiple touch inputs.

You can use Input.touchSupported to check if touch is supported on your computer. If it returns true, then read from touch with Input.GetTouch(0). If it returns false, then use Input.GetMouseButtonDown to read from the mouse instead. Touch won't work if your computer does not support touch screen. Below is complete code on how to do this:
void Update()
{
if (Input.touchSupported)
{
Debug.Log("TOUCH IS SUPPORTED");
if ((Input.touchCount > 0) && (Input.GetTouch(0).phase == TouchPhase.Began))
{
print("touched screen");
}
}
else
{
Debug.Log("TOUCH IS NOT SUPPORTED");
if (Input.GetMouseButtonDown(0))
{
print("clicked screen");
}
}
}