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Bug GetUIVertexStream not giving correct vertex positions?

Discussion in 'UGUI & TextMesh Pro' started by SpookyCat, Feb 9, 2023.

  1. SpookyCat


    Jan 25, 2010
    I am doing a simple script that is based of the UI Image component in an attempt to something with the vertices of the image object. To that end I use the IMeshModifier so I can use the ModifyMesh(VertexHelper vh) function. All works fine I can get the image showing in Unity and ModifyMesh is called and it gives me 4 vertices as expected but vertex 3 and 4 are the same value which is clearly not true for a quad.
    Here is a screenshot showing the output of the script below and you can see the last two values are the same.
    Screenshot 2023-02-09 142608.png
    And the simple script.
    Code (CSharp):
    1. using UnityEngine;
    2. using UnityEngine.UI;
    3. using System.Collections.Generic;
    5. [ExecuteInEditMode]
    6. public class BendUI : Image, IMeshModifier
    7. {
    8.     public GameObject    uiObj;
    10.     public void ModifyMesh(Mesh mesh)
    11.     {
    12.     }
    14.     public void ModifyMesh(VertexHelper vh)
    15.     {
    16.         Debug.Log("mod mesh vh count " + vh.currentVertCount);
    18.         List<UIVertex> verts = new List<UIVertex>();
    19.         vh.GetUIVertexStream(verts);
    21.         for ( int i = 0; i < vh.currentVertCount; i++ )
    22.         {
    23.             Debug.Log(i + " " + verts[i].position);
    24.         }
    25.     }
    26. }
    Is this a known bug or have I done something wrong? Can't see what it is a very simple script.