What is the best way to raycast mutliple rays over a line

Question

I am trying to raycast multiple rays from a line downward just like the picture below. What is the best way to do that? Notice that I don't want to use a box overlap or sphere because I don't want to get hit from the sides. alt text

Answer 1

Here's a little script that might do just that.

To raycast, you need a start point and a direction. The direction is simply Vector3.Down, but the start point/s needs to be a set of points on the line.

A point can be chosen using the formula: Vector3 point = StartPointOfLine + Direction * DistanceAcrossLine; This means that, if you wanted a point on a line, 5 units across, you would write: Vector3 point = StartPointOfLine + Direction * 5;

Here's the full implementation for what you're asking for. Hopefully it works, haven't tried it:

     // Distance between each raycast
     public float Step = 1f;
 
     // Number of rays across the line
     public int Rays = 10;
 
     [Header("Line Values")]
     public Vector3 StartPoint = Vector3.zero;
     public Vector3 Direction = Vector3.right;
 
     void Start()
     {
         FireRaysOutSideOfLine();
     }
 
     void FireRaysOutSideOfLine()
     {
         for (int i = 0; i < Rays; i++)
         {
             Vector3 startPoint = StartPoint + Direction * i * Step;
 
             if (Physics.Raycast(startPoint, Vector3.down, out RaycastHit hit))
             {
                 // Raycast from side of line hit something
 
                 // Do whatever u want with 'hit'
             }
         }
     }

This script fires 10 rays facing down, each ray 1 unit apart from each other, out of the side of a line facing right. Hope that helps @akyu01

What is the best way to raycast mutliple rays over a line

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