DrawLine problem

Unity Engine
1

I use the DrawLine method in a function called GetLocations()

as this

Debug.DrawLine(AllNodesList[i].transform.position, localNodeDirection, Color.red);

this function is called in the Awake() function

the problem is the red lines are drawn once in the game start and then vanish
I need them to stay so I can see them

they only last for a moment

2

You need to use DrawLine in Update, since the lines are only drawn for one frame.

–Eric

3

I used it in update but its drawn twice and then nothing

4

In that case the variables must be changing. You can copy them to other variables that don’t change, so that you can draw the line properly in Update.

–Eric

5

but it draws a line from one object but the end is far away from the second one

Vector3 localNodeDirection = AllNodesList[2].transform.position - AllNodesList[1].transform.position;
        Debug.DrawLine(AllNodesList[1].transform.position, localNodeDirection, Color.red);
        print("line drawn between " + AllNodesList[1].name + " and " + AllNodesList[2].name);
6

DrawLine renders the line for one frame only. If you want it to last, you need to repeatedly render it every frame.

–Eric

7

I know that
it lasts already when I put it in the Update() function
what I say is
the first point of the line is adjusted
the end point is faaaaaaaaaaaaaaaar away from the real location