Xors3D engine

[primo]

Xors3D is an abandonware graphics engine, speedy and good, but does not have enough docs. it needs directX 9 to works. download Directx 9 directx_Jun2010_redist.exe from microsoft
http://download.microsoft.com/downlo...010_redist.exe
now the story: while checking my very old external hard disk i have found xors3d files examples and includes for powerbasic made by user in PB forum , most likely i have downloaded it from xors3d forum, now closed and its dev is stopped.
if you want to give it a try, download the engine (60 Mega) from here
https://drive.google.com/file/d/0Bzk...?usp=drive_web
and then download the powerbasic files (attached), i have added other examples (box_of_points)+(starry_box) .
save the attached "powerbasic" folder to the xors3d installation in this place \Samples\Source\
so \Samples\Source\ will now have these folders:
Blitz3D, BlitzMax, C++, Media, PowerBasic
all examples works. the purpose to save at this place because some examples uses the textures, models from this engine.


now i want to try it for thinbasic. in the Xors3ddecls.inc i have changed parameters number to num.
in file xors3d.inc now the problem of 350 lines something like this:
IF ISMISSING(pred) THEN Local_pred = 255 ELSE Local_pred = pred

i have changed all these 350 lines to something like this
Local_pred = IIF( ISMISSING(pred) ,255,pred)
using a 3 regular expressions using notepad++
another problem is the function ISMISSING . and i don't know how to implement it, so i have created an empty ISMISSING function to do nothing
it works with some examples such as the attached box_of_points.tbasic but not with examples starry_with_cube.tbasic : it display the 2 cubes and the big one should be textured with a drawing to a texture. while the equivalent powerbasic example starry_box.bas works as should be. so what should we do with this ISMISSING function ?

notes:
there are good examples about xors3d for bitz3D here:
https://www.blitzforum.de/forum/viewtopic.php?t=34431
i have adapted from it the example starry_box

don't forget to download the full xors3d from here https://drive.google.com/file/d/0Bzk...?usp=drive_web as explained above