How to make LineRenderer in GameObject Facing?

Question

I'm trying to Draw a line in front of my character but its not working. It's my code

I Tried this

    RaycastHit2D hitInfo = Physics2D.Raycast(transform.position, transform.forward, 50);
     if (hitInfo.collider != null) {
         GetComponent<LineRenderer>().SetPosition(0, transform.position);
         GetComponent<LineRenderer>().SetPosition(1, hitInfo.point);
     } else {
         GetComponent<LineRenderer>().SetPosition(0, transform.position);
         GetComponent<LineRenderer>().SetPosition(1, transform.position + transform.forward * 50);
     }

and i tried this

     RaycastHit2D hitInfo = Physics2D.Raycast(transform.position, transform.forward, 50);
     if (hitInfo.collider != null) {
         GetComponent<LineRenderer>().SetPosition(0, transform.position);
         GetComponent<LineRenderer>().SetPosition(1, transform.forward * 50);
     } else {
         GetComponent<LineRenderer>().SetPosition(0, transform.position);
         GetComponent<LineRenderer>().SetPosition(1, transform.forward * 50);
     }

My LineRenderer not getting Y axis, how i correctly this? I'm using Joystick to rotate the player.

alt text

Answer 1

Answer by MrRightclick · Feb 05, 2019 at 12:41 PM

You're using Transform.forward which equals to (0, 0, 1). If you're moving and rotating on the X and Y axes, perhaps try using Transform.up?

edit:

             GetComponent<LineRenderer>().SetPosition(0, transform.position);
             GetComponent<LineRenderer>().SetPosition(1, transform.up * 50);

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xxmariofer · Feb 05, 2019 at 12:53 PM 0

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hello, line renderers doesnt work with directions, but with 2 points, so if he needs to get the point in the forward direction, he just needs to apply player.forward, i dont know why his first attempt doesnt work to be honest.

MrRightclick xxmariofer · Feb 05, 2019 at 01:14 PM 1

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Yes, but he's drawing the line using

      GetComponent<LineRenderer>().SetPosition(0, transform.position);
      GetComponent<LineRenderer>().SetPosition(1, transform.forward * 50);

which sets the line end to a a point on (transform.forward * 50), which goes on the Z-axis, hence drawing the line "downwards" from the character, or in other words into the ground.

This is all assuming he's using the 2D view of Unity, which means X is horizontal, and Y is vertical, leaving Z to deal with depth (in other words, up towards the sky and down towards the ground for the 2D character).

xxmariofer MrRightclick · Feb 05, 2019 at 02:07 PM 0

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thats true, my fault i didnt see the screenshot of the game and i was imagine a 3d game. then changing to transform.left should fix it. but i am not sure if he means that the y of the linerenderer is 0, he dont even need to uodate the line by script if he just needs to set it up to look in one direction.

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How to make LineRenderer in GameObject Facing?

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