Looks like this are map coordinates tilex are world coordinates tilex tiley and

Slide Isometric Tilemaps 307

So you’re sitting there screaming, “That’s it?!” at the top of your lungs. Calm down. A great deal of the functionality of an IsoHex engine rests on just such a function.

For hex, there is just a slight modification to the function:

308 Isometric Game Programming with DirectX 7.0

Figure 12.9

void DrawMap()
{
POINT ptTile;//tile pixel coordinate
POINT ptMap;//map coordinate
//get tile width and height