AddUIVertexQuad()

Unity Engine
1

I have a script that loops over this function, but it only draws the last quad. For example:

public class Draw_Map : Graphic
{
    private static Vector2Int divisions = new Vector2Int(30, 30);
    private Vector2Int[,] grid_verts = new Vector2Int[(divisions.x), (divisions.y)];
    private Vector2Int[] verts = new Vector2Int[4];
    private List<Vector2Int[]> quad_list = new List<Vector2Int[]>();
    private bool[,] grid_sector_visited = new bool[divisions.x, divisions.y];
    private int x_coord;
    private int y_coord;
    private UIVertex vert = UIVertex.simpleVert;
    UIVertex[] vbo = new UIVertex[4];

    protected UIVertex[] SetVbo(Vector2Int[] vertices)
    {
        for (int i = 0; i < vertices.Length; i++)
        {
            vert.color = color;
            vert.position = new Vector2(vertices[i].x, vertices[i].y);
            vbo[i] = vert;
        }
        return vbo;
    }

  
    protected override void OnPopulateMesh(VertexHelper vh)
    {
        if (Application.isPlaying && !grid_sector_visited[x_coord, y_coord])
        {

            grid_sector_visited[x_coord, y_coord] = true;

            verts[0] = grid_verts[x_coord, y_coord];
            verts[1] = grid_verts[x_coord + 1, y_coord];
            verts[2] = grid_verts[x_coord + 1, y_coord + 1];
            verts[3] = grid_verts[x_coord, y_coord + 1];

            quad_list.Add(verts);
            vh.Clear();

            for (int i = 0; i < quad_list.Count; i++)
            {

                vh.AddUIVertexQuad(SetVbo(quad_list[i]));
            }
          
        }
    }
  
}

where I use SetVbo() from this thread: New UI and line drawing

As I said, at the bottom, where it loops over vh.AddUIVertexQuad(), the game only displays the last quad. All previous quads in the list are not displayed. The guys in that thread I linked seem to be able to make it display all the quads in the loop, but I can’t make it work. Where is my mistake?

Also, I have another question: how do I map a texture to the quad (RectTransform)? Can I skip the material and go straight to the texture? The material doesn’t look right. Thanks

2

I think I see what the problem is. Since I’ve been overwriting the vector2 array verts[ ] every time, I was changing what was stored in the list. All of the quads are drawing, but they are all overlapping each other, since they are all the same. So, I need to change lines 32 - 37 somehow with some new array of vector2s that doesn’t get overwritten.