How to mark the vertices on a mesh and make the markers follow them as you apply transformations

Hi everybody I want to replicate this example, but I don't know where to start, If you could help with some script, info, tutorial, project, or anything that help me and let me do this same thing I'll really appreciate it.

Thank you very much!!

 

Well, they're probably using Gizmos.DrawCube for the markers, and I think they're looping through the vertices of the mesh. The transformations are simple. The transformations are simple, just use transform.TransformPoint() on each of them.
So, the pseudo code looks something like this:

Code (CSharp):

1. Mesh mesh;
2.  
3. void OnDrawGizmosSelected() //Draw the markers, if the object is selected
4.     Gizmos.color = Color.red
5.     for each vertex in the Mesh
6.         worldPos = transform.TransformPoint(vertex)
7.         Gizmos.DrawCube(worldPos, Vector3.one * 0.1f)
8.     endfor
9. end

 

Hi gorbit99 How are you? On your code there are some things that I don't understand for example:

in the for each with the mesh I will have to use mesh.vertices?
the worldPos would be a Vector3 or Transform?
the method as well would going to Start() or Update() ?
And you use Mesh only, there is a initialize that would be necessary for this?

 

Learn C# and then watch the official unity tutorials. I just can't help you if you don't have the basic knowledge required

 

I'm asking because checking the code I got this as a error I made the adjustment necessaries but I don't know what I missing

Code (CSharp):

1. ArgumentNullException: Argument cannot be null.
2. Parameter name: _unity_self
3. UnityEngine.Mesh.GetAllocArrayFromChannel[Vector3] (InternalShaderChannel channel, InternalVertexChannelType format, Int32 dim) (at /Users/builduser/buildslave/unity/build/Runtime/Export/Mesh.cs:54)
4. UnityEngine.Mesh.GetAllocArrayFromChannel[Vector3] (InternalShaderChannel channel) (at /Users/builduser/buildslave/unity/build/Runtime/Export/Mesh.cs:68)
5. UnityEngine.Mesh.get_vertices () (at /Users/builduser/buildslave/unity/build/Runtime/Export/Mesh.cs:145)
6. MarkVertexFour.Start () (at Assets/Code/MarkVertexFour.cs:16)

 

I updated the code this way

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class MarkVertexFour : MonoBehaviour {
6.  
7.     Mesh mesh;
8.  
9.  
10.     // Use this for initialization
11.     void Start () {
12.            
13.         Gizmos.color = Color.red;
14.         mesh = GetComponent<Mesh>();
15.  
16.         foreach (Vector3 vertex in mesh.vertices) {
17.             Vector3    worldPos = transform.TransformPoint(vertex);
18.             Gizmos.DrawCube(worldPos, Vector3.one * 0.1f);
19.         }
20.    
21.     }
22.    
23.     // Update is called once per frame
24.     void Update () {
25.        
26.     }
27.  
28. }
29.  

And this is showed up on console and I'm not sure what could I missing

 

Any suggestion? About What am I missing? Please

 

Seems like your mesh doesn't have any vertex.