Help - Line Renderer Thick Broken bug.

Unity Engine
1

Help - Line Renderer Broken bug.

Hello every one, i’m using Unity 's Line Renderer to draw a line. But it have some bug, when i try to move cursor near last point of line, it will start broken.

If anyone have exp with this please help me to fix this bug.

Below is my video for this bug:

And full project in here: GitHub - Brackeys/Line-Rider-Replica: This is the source code for a Line Rider Replica created during a Twitch Livestream.

Thanks you!

2

You need to check for sharp turn, here’s my solution

on your Line.cs

//Checking for sharp angle
public bool IsSharpAngle(Vector2 mousePos)
    {
        if (points!=null&&points.Count >= 2)
        {
            Vector2 lastDelta = points.Last() - points[points.Count - 1];
            Vector2 newDelta = mousePos-points.Last();
            return Vector2.Dot(newDelta, lastDelta) <= 0;
        }
        return false;
    }
//return last point
    public Vector2 LastPoint()
    {
        return points.Last();
    }

Then finally in your LineCreator.cs

if (activeLine != null)
        {
            //check sharp angle
            Vector2 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);

            if(activeLine.IsSharpAngle(mousePos))
            {
                Line prevLine = activeLine;
                GameObject lineGO = Instantiate(linePrefab);
                activeLine = lineGO.GetComponent<Line>();
                activeLine.UpdateLine(prevLine.LastPoint());
            }
            activeLine.UpdateLine(mousePos);
        }
2 Likes
3

@jackishere :

  • Thanks you so much, it’s fix the issue. I try it and work like a charm. :smile:
  • So problem is Sharp Angle, just check if last two vector make the sharp angle, we will create new line, right?
1 Like
4

yeah that’s pretty much it! good luck and happy coding!

5

Thanks you very much!