Is there a way to check collision for a line rendered by a line renderer?

Questions & Answers
1

I rendered a Line in the worldspace and would like to make the player follow the line using touch input. Then I want to check how accurate the player is. Is there a way to make raycasting on the line? The line renderer has a bounding box, but the box size is the size that covers the whole line set, I need a point precision on the collision check. Can anyone help on this? Any suggestion to implement this?

2

Instead the line renderer use raycast in your scripts, then use the line renderer with the same coordenates of raycast just to show the line.

3

A simple point-line distance check may work better than collision detection in this case.

A pseudo-code example:

if DistanceFromPlayerToLine < Tolerance
    // Player is following line correctly.
else
    // Player has strayed too far from the line.

I don't have any references for 3D distance equations handy.

If your game is 2D:

Here is a good reference for 2D point-line distance.

For C# code, you can search the code in this google code project for "GetPointSegmentDistanceSq" or "GetPointLineDistanceSq".