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I make a curved line with line renderer. and a sphere move along it. i want to draw a line only behind the sphere.

so i do something like this.

`` lr.positionCount = 256;

    while (delta < time)
    {    
        lr.SetPosition(i++, curPos);

        yield return new WaitForFixedUpdate();
    }

``

and the problem is, because of i set the size of Positions 256, if time is short, there are zero vectors in position. so line renderer draw meaningless line.

is there a way to set PositionCount dynamically like List? or any good way to not draw if positions are zero?

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  • \$\begingroup\$ you can reset positionCount in loop. something like lr.positionCount = i++; and it works like List but i don't know how it works inside... \$\endgroup\$ – Hree Nov 25 at 12:45
  • \$\begingroup\$ Possible duplicate of Enable / Disable LineRenderer Points. You could also clip the line in the shader, similar to this Q&A, setting the cut-off point as a material uniform so it moves as your script dictates. \$\endgroup\$ – DMGregory Nov 25 at 14:00

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