Detect if STL is binary or ASCII

[shine world]

Hi all,
attached the code that I use to detect if STL is in ASCII or BINARY format.
I wrote for and old version of GLScene but can be converted to latest source code.
The STL can also read colors when embedded in facet extra bytes.

[Pavel Vassiliev]

Thnx shine world,
I'll include it in the current repo version
Pavel

[Jerome.D (BeanzMaster)]

Hi i remember well this issue about binary/text of STL format was already resolve some time ago. I've made the change from someone in this forum

https://sourceforge.net/p/glscene/discussion/93605/thread/6a14ad56/?limit=25#3eb1
and
https://sourceforge.net/p/glscene/discussion/93606/thread/bc1a551d/

Best regards

[shine world]

Hi Jerome
Unfortunately this rule:

   isBinary:=True;
   i:=0;
   while i<cFULL_HEADER_LEN-1 do
   begin
    if (headerBuf[i]<#32) and (headerBuf[i]<>#0)  then //then
    begin
         isBinary:=False;
         Break;
     end;
     Inc(i);
   end;

don't cover all my cases.

We receive a lot of binary STLs from a very etherogeneous group of CAD Systems.
Seem none respect a common rule to content of Header part.
I will collect all test versions in a zip and I will place here (BobCAD/CAM, Fusion 360, MeshLab, SolidWorks, DesignSpark Mechanincal, Catia, Hypermill, and so on....) a very mess of different header formats.....

[Pavel Vassiliev]

shine world,
I've included your update for GLFileSTL in current version
Pavel

[Jerome.D (BeanzMaster)]

Hi Shine it will be a great help to improve loader if you can place many various format of STL files ;)