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Question by Piesk · Oct 30, 2013 at 04:42 PM · vertices

Find all vertices in a radius around a center vertex

I am trying to find all vertices within a certain radius around a center vertex. Then setting these vertices alpha to 0. I am currently using this code:

 public void clearFog(Vector3 center, float radius)
     {
         colours = mesh.colors;
         
         //find the point in local space
         Vector3 localSpaceCenter = transform.InverseTransformPoint(center);
         
         for(int index = 0; index < verts.Length; index ++)
         {
             float distance = Vector3.Distance(verts[index], localSpaceCenter);
             
             //if vert is within the radius 
             if(distance < radius)
             {
                 colours[index].a = 0;
             }
 
         }
         
         mesh.colors = colours;
         
     }

But i clearly don't understand something here, distance is always returning values between 1 and around 1.006 ish... how can the distance of every vertex in the mesh be between 1 and 1.006 away from the center vertex? It makes trying to judge how large the radius should be very difficult. What am i doing wrong here?

Thanks in advance.

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Answer by Piesk · Nov 08, 2013 at 11:43 AM

This has been solved, i think it was because of the use of localspace, getting rid of that and just using the hitpoint worked i believe.

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