Control the scene camera using arrow gui buttons

Questions & Answers
1

Hi everyone

I’m attempting to control my camera arround my game object through keyboard arrows but i need to put arrow buttons on gui so anyone can control the same thing from gui also.

right now i have this script.

//WASD to orbit, left Ctrl/Alt to zoom
using UnityEngine;

[AddComponentMenu("Camera-Control/Keyboard Orbit")]

public class KeyboardOrbit : MonoBehaviour {
public Transform target;
public float distance = 20.0f;
public float zoomSpd = 2.0f;

public float xSpeed = 240.0f;
public float ySpeed = 123.0f;

public int yMinLimit = -723;
public int yMaxLimit = 877;

private float x = 0.0f;
private float y = 0.0f;

public void Start () {
    Vector3 angles = transform.eulerAngles;
    x = angles.y;
    y = angles.x;

    // Make the rigid body not change rotation
    if (rigidbody)
        rigidbody.freezeRotation = true;
    }
}

public void LateUpdate () {
    if (target) {
        x -= Input.GetAxis("Horizontal") * xSpeed * 0.02f;
        y += Input.GetAxis("Vertical") * ySpeed * 0.02f;

        y = ClampAngle(y, yMinLimit, yMaxLimit);

        distance -= Input.GetAxis("Fire1") zoomSpd 0.02f;
        distance += Input.GetAxis("Fire2") zoomSpd 0.02f;

        Quaternion rotation = Quaternion.Euler(y, x, 0.0f);
        Vector3 position = rotation * new Vector3(0.0f, 0.0f, -distance) + target.position;

        transform.rotation = rotation;
        transform.position = position;
    }
}

public static float ClampAngle (float angle, float min, float max) {
    if (angle < -360.0f)
    angle += 360.0f;
    if (angle > 360.0f)
    angle -= 360.0f;
    return Mathf.Clamp (angle, min, max);
}

here camera orbit is controlled by keyboard.i need it to be controlled by arrow buttons on gui.

THANKS.

2

First off, add some private variables for communicating between the GUI functions and the movement functions- call them something like GUIHorizontal and GUIVertical.

private float GUIHorizontal = 0;
private float GUIVertical = 0;

Then, wherever you have a call to ‘Input.GetAxis(whatever)’ replace that with the appropriate GUI axis (horizontal or vertical)- for example:

x -= GUIHorizontal * xSpeed * 0.02f;

Now, make a GUI function that sets the horizontal and vertical numbers according to buttons you are currently holding down. Obviously I don’t know where you need to place the buttons on your screen, so I’ll just use GUILayout for the purposes of this tutorial.

void OnGUI()
{
    if(Event.current.type == EventType.Repaint)
    {
        GUIHorizontal = 0;
        GUIVertical = 0;
    }
    GUILayout.BeginVertical();
    if(GUILayout.RepeatButton("UP"))
    {
        GUIVertical = 1;
    }
    GUILayout.BeginHorizontal();
    if(GUILayout.RepeatButton("LEFT"))
    {
        GUIHorizontal = -1;
    }
    if(GUILayout.RepeatButton("RIGHT"))
    {
        GUIHorizontal = 1;
    }
    GUILayout.EndHorizontal();
    if(GUILayout.RepeatButton("DOWN"))
    {
        GUIVertical = -1;
    }
    GUILayout.EndVertical();
}

This will move the camera around according to those four buttons, instead of the keyboard!