Determine Vec3 pos from minimap marker

[bastiflew]

Hi everyone,

I try to determine a vec3 position from a minimap marker.
I just need to get a pos relative to my minimap position (so the center of the minimap)

What I found so far :

    [StructLayout(LayoutKind.Sequential, Pack = 4, CharSet = CharSet.Ansi, Size = 0x114)]
    public struct MinimapMarker
    {
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x100)]
        public char[] markerNameRaw;                                //0x0
        public Vec2 Position;                                       //0x100
        public uint unk1;                                           //0x108
        public uint unk2;                                           //0x10C
        public uint unk3;                                           //0x110
    }

and my method to fetch markers :

        public static MinimapMarker[] GetMinimapMarkers()
        {
            var ui = GetUi(UiElementHash.MinimapMain);
            var count = D3Memory.ReadMemoryAsInt(ui.Ofs + 0x120AC);
            var markers = new MinimapMarker[count];

            for (uint i = 0; i < count; i++)
            {
                var currentMarker = D3Memory.ReadMemory<MinimapMarker>(ui.Ofs + 0xCAC + (i * (uint)Marshal.SizeOf(typeof(MinimapMarker))));
                markers[i] = currentMarker;
            }

            return markers;
        }

note that UiElementHash.MinimapMain correspond to "Root.NormalLayer.minimap_dialog_backgroundScreen.minimap_dialog_pve.minimap_pve _main" UI.

Hi have some weird Y coords for minimap center, for example :
I teleport to a map, so I am on the center of the waypoint, and the waypoint marker is perfectly in the minimap center.

But if I get UI center (without ratio transform) I get this :

 WayPoint Position :
    x: 1665.60071
    y: 212.0
minimapCenter (from UI)
{X: 1665,601, Y: 230}
    x: 1665.60071
    y: 230.0

X is perferctly the same, but Y not.

If someone have a clue about this, it will help me a lot

Thanks

[raler]

What resolution do you run diablo in? Would be helpful when trying to figure this out. Have you also tried comparing the minimap center to where your character is located on the minimap? I would assume that would always yield the same result.

**Edit: I am seeing the same results as you are. No idea why =/ However, it does match up with the map perfectly: https://i.imgur.com/9WyuSKj.png

Also, you would only be able to get the x and y world coordinates from a minimap marker, as they do not take z coords into account.

[karnkore]

Add 18.0 to your Y because the D3 code subtracts it.

void __thiscall MarkerSet(int this, int a2, int a3, int a4, char a5, int a6)
{
  int v6; // edi@1
  signed int v7; // esi@1
  int v8; // esi@3
  int v9; // eax@3

  v6 = this;
  v7 = *(_DWORD *)(this + 73900);
  if ( v7 < 256 )
  {
    if ( sub_12E5730(a2) )
    {
      v8 = 276 * v7 + v6 + 3244;
      v9 = sub_12E5710(a2);
      Convert(v8, v9, 256);
      *(_BYTE *)(v8 + 255) = 0;
      *(float *)(v8 + 256) = *(float *)a3;
      *(float *)(v8 + 260) = *(float *)(a3 + 4);
      *(float *)(v8 + 260) = *(float *)(v8 + 260) - 18.0;// 18.0 is subtracted allways in minimap code
      *(_DWORD *)(v8 + 264) = a4;
      *(_BYTE *)(v8 + 268) = a5;
      *(_DWORD *)(v8 + 272) = a6;
      ++*(_DWORD *)(v6 + 73900);
    }
  }
}

[bastiflew]

Thanks karnkore, I just apply a 45° rotation, and it fits perfectly