I just started learning Unity for few days. I am testing the function of UI Arrow Button which is supposed to be able to translate a car object in x and z position in a 3D scene.
Since my target platform is WebGL, I also coded the keyboard control of arrow button. Currently I wrote 2 scripts for this function. One is attached to the car object and another is attached to the UI Up Arrow Button.
The keyboard control worked fine in PC but I would like to enable the control of translation of the car object also in mobile (though Unity WebGL doesn’t officially support mobile platforms). I attempted to use the OnPointerDown() function to get it work but it wasn’t even called when I pressed the up button.
How to get the UI arrow button work when it is pressed down?
The Image of the Interface is here.
And my scripts are here:
the one attached to car object
using UnityEngine;
public class CarPlayerControl : MonoBehaviour {
public float speed = 40;
private bool touchCtrl = false;
private float xInput = 0f;
private float zInput = 0f;
void Awake(){
//if (Input.touchSupported && Application.platform
// != RuntimePlatform.WebGLPlayer){
//touchCtrl = true;
//}
}
void FixedUpdate(){
xInput = 0f;
zInput = 0f;
if (touchCtrl)
{
//if (Input.GetButton("ButtonUp"))
//{
// xInput = 1.0f;
// Debug.Log("button up " + xInput);
//}
//else if (Input.GetButton("ButtonDown"))
//{
// xInput = -1.0f;
// Debug.Log("button down " + xInput);
//}
//else if (Input.GetButton("ButtonLeft"))
//{
// zInput = 1.0f;
// Debug.Log("button left " + zInput);
//}
//else if (Input.GetButton("ButtonRight"))
//{
// zInput = -1.0f;
// Debug.Log("button right " + zInput);
//}
}
else //mouse
{
xInput = Input.GetAxis("Horizontal");
zInput = Input.GetAxis("Vertical");
}
Move(xInput, zInput);
}
public void Move(float xInput, float zInput)
{
float xMove = xInput * speed * Time.deltaTime;
float zMove = zInput * speed * Time.deltaTime;
float x = KeepXWithinRange(xMove);
float y = transform.position.y;
float z = KeepZWithinRange(zMove);
transform.position = new Vector3(x, y, z);
}
private float KeepXWithinRange(float xMove){
float x = transform.position.x + xMove;
return Mathf.Clamp(x, 0, 900);
}
private float KeepZWithinRange(float zMove)
{
float z = transform.position.z + zMove;
return Mathf.Clamp(z, -470, 500);
}
}
and the one attached to the UI Up arrow button
using UnityEngine;
public class ButtonUpControl : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
{
public GameObject car;
private CarPlayerControl carPlayerControl;
private bool mouseDown;
private float xInput;
void Awake()
{
carPlayerControl = car.GetComponent<CarPlayerControl>();
mouseDown = false;
}
void Start()
{
}
void FixedUpdate()
{
if (mouseDown) {
xInput = 1.0f;
}
else {
xInput = 0f;
}
carPlayerControl.Move(xInput, 0f);
}
public void OnPointerDown(PointerEventData eventData)
{
mouseDown = true;
Debug.Log("on ptr down btn up ");
}
public void OnPointerUp(PointerEventData eventData)
{
mouseDown = false;
Debug.Log("on ptr up btn up ");
}
}
