Kotlin, Launching Settings Activity is Showing Main Activity

The problem is that the code in SettingsActivity is not tied to the settings_activity.xml file. So it is using the activity_main.xml instead. It does in fact switch activities, the header at the top shows that it is in the Settings, but it shows the same information on the Main Activity. Problem showed up after copying and pasting code.

Check the following line under the initial onCreate function

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)  // <-- Should be R.layout.settings_activity

The setContentView line should reflect the Layout XML file under res -> layout -> settings_activity.xml

HTML redirect to website

Change “website.toredirect.com” to the website you would like to redirect to. Put the code in a index.html or index.php file. If you stick it in the root website directory it’ll redirect automatically get called when you hit the website.

<meta HTTP-EQUIV="REFRESH" content=0"; url=https://website.toredirect.com">

Bash array example

#!/bin/bash
array=(one two three)
echo "Printing first object in array."  #Replace 0 with the place number of the array item
echo ${array[0]}

echo ""

echo "Whole array"
echo ${array[*]} 

echo "" 

echo "Array indexes" 
echo ${!array[*]}

Output

Printing first object in array. 
one

Whole array
one two three

Array indexes
0 1 2

https://www.linuxjournal.com/content/bash-arrays

Clamp rotation of camera in Unity

Some notes and issues when trying to clamp the rotation of a camera in Unity. All the code was put on a script assigned to a controller that controlled the camera view. Used the Simple Touch Controller from the asset store.

Problem trying to clamp EulerAngles

It appears that the following code does not work as EulerAngles expects a value from 0-365.

transform.localEulerAngles = new Vector3(Mathf.Clamp(transform.localEulerAngles.x - rightController.GetTouchPosition.y * Time.deltaTime * speedContinuousLook, 0f , 20f ),transform.localEulerAngles.y + rightController.GetTouchPosition.x * Time.deltaTime * speedContinuousLook, 0f);

Extra debug info

Debug.Log("Rotation = " + transform.localEulerAngles.ToString());

Code to clamp rotation

You have to do some math to take the value from 0-365, then translate it to -90 – 90 so it can be clamped properly

// Put these with the rest of your public variables.  These should show up in the Unity Inspector and allow you to modify the values
public float speedProgressiveLook;
public float clampXRotationUp;
//  The following lines allow the script to Clamp the camera X rotation and should go in the Update function

float playerRotation = transform.localEulerAngles.x - rightController.GetTouchPosition.y * Time.deltaTime * speedContinuousLook; 

if (playerRotation > 180)        {             
    playerRotation = playerRotation - 360 ;  // Sets our working numbers between -180 - 180  
}    
     
playerRotation = Mathf.Clamp(playerRotation, clampXRotationDown, clampXRotationUp);

Vector3 newRotation;
newRotation.x = playerRotation;
newRotation.y = transform.localEulerAngles.y + rightController.GetTouchPosition.x * Time.deltaTime * speedContinuousLook;
newRotation.z = 0;

transform.localEulerAngles = newRotation;

The following links were helpful.

https://gamedev.stackexchange.com/questions/120500/using-mathf-clamp-in-vector3-to-restrict-object-drag

https://www.reddit.com/r/Unity3D/comments/8ue9fp/mathfclamp_is_refusing_to_work_can_anybody_offer/

https://stackoverflow.com/questions/26682155/using-mathf-clamp-in-unity-for-boundries

Unity script for enemy to follow player

The following script will let an object follow a player when it is within a certain range and will stop following it once it is out of a certain range

The following variables can be adjusted from the Inspector.

Attack Speed = How fast the game object moves
Attack Distance = How close does the player need to be to start moving
Buffer Distance = How far away from the player should the game object stop
Player = Game player to target

To use script, create a new C# script named FollowPlayer and paste in the following.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class FollowPlayer : MonoBehaviour
{

    public float attackSpeed = 4;
    public float attackDistance;
    public float bufferDistance;
    public GameObject player;

    Transform playerTransform;

    void GetPlayerTransform()
    {
        if (player != null)
        {
            playerTransform = player.transform;
        }
        else
        {
            Debug.Log("Player not specified in Inspector");
        }
    }

    // Start is called before the first frame update
    void Start()
    {
        GetPlayerTransform();
    }

    // Update is called once per frame
    void Update()
    {
        var distance = Vector3.Distance(playerTransform.position, transform.position);
        // Debug.Log("Distance to Player" + distance);
        if (distance <= attackDistance)
        {
            if (distance >= bufferDistance)
            {
                transform.position += transform.forward * attackSpeed * Time.deltaTime;
            }
        }
    }
}

Helpful Links

https://forum.unity.com/threads/c-get-transform-of-another-gameobject.177216/
https://docs.unity3d.com/ScriptReference/Vector3.Distance.html