public void FillVerts(int index, Rect rect)
{
vertices[index] = new Vector3(rect.xMin, -rect.yMax, 0f);
vertices[index + 1] = new Vector3(rect.xMin, -rect.yMin, 0f);
vertices[index + 2] = new Vector3(rect.xMax, -rect.yMin, 0f);
vertices[index + 3] = new Vector3(rect.xMax, -rect.yMax, 0f);
}