LFS Forum - Spr file and player flags (driver settings)

#1 - zakret

Spr file and player flags (driver settings)

Fri, 3 Apr 2009 07:24

Hi

Could someone explain me how to read and understand player flags from spr file? I would like to read if driver used mouse or keyboard, braking help etc.

This is how I do it in php:



<?php 
fseek($stream,132);
$player_flags = hexdec(bin2hex(fread($stream,1)));
$player_flags = unpack("C*",$player_flags);
 
fseek($stream,133);
$player_flags2 = hexdec(bin2hex(fread($stream,1)));
$player_flags2 = unpack("C*",$player_flags2);
?>

After that when I print to screen I see for example:
playerFlags -> Array ( [1] => 55 [2] => 51 )
playerFlags2 -> Array ( [1] => 54 )

so playerFlags is 73 (from ascii code 55=7, 51=3) and playerFlags2 = 6

I don't know how to split those two values:
1.
73 = 64(Braking help) + 8(auto shift)+1(left hand drive)
6 = 4(gear change blip) + 2(gear change cut)

2.
736 = 512(auto clutch) + 128(axis clutch)+64(braking help)+32(reserved ?)

3.673 = 512(auto clutch) + 128(axis clutch) + 32(reserved ?) + 1(left hand drive)

Or maybe during reading,converting (unpack) file there is a bug?

Best Regards
Tomasz Zakrecki

#2 - Dygear

Fri, 3 Apr 2009 13:41



<?php 
function convert_flags_hlaps($flags_hlaps) {
    $data = array();
    if ($flags_hlaps & 1)       $data[1]    = 'LEFTHANDDRIVE';
    if ($flags_hlaps & 2)       $data[2]    = 'GEARCHANGECUT';
    if ($flags_hlaps & 4)       $data[4]    = 'GEARCHANGEBLIP';
    if ($flags_hlaps & 8)       $data[8]    = 'AUTOGEAR';
    if ($flags_hlaps & 16)      $data[16]   = 'SHIFTER';
    if ($flags_hlaps & 64)      $data[64]   = 'BRAKEHELP';
    if ($flags_hlaps & 128)     $data[128]  = 'AXISCLUTCH';
    if ($flags_hlaps & 512)     $data[512]  = 'AUTOCLUTCH';
    if ($flags_hlaps & 1024)    $data[1024] = 'MOUSESTEER';
    if ($flags_hlaps & 2048)    $data[2048] = 'KN';
    if ($flags_hlaps & 4096)    $data[4096] = 'KS';
    if (!($flags_hlaps & 7168)) $data[7168] = 'WHEEL';
    return $data;
}
?>

That's how we split the values into to there own data set from the LFSWorld SDK.

What your looking for is how to handle Bit Wise Operations in PHP

#3 - zakret

Sun, 5 Apr 2009 21:11

Hi

Thank you for answer. But i have also a little problem with reading from file. I don't know how to exactly read player flags from file and convert it to input variable for Your function. I tried:



<?php 
$stream = fopen($file,"rb"))
//1     word    132     player flags        : driver settings (see NOTES)
fseek($stream,132);

$player_flags = bin2hex(fread($stream,2));
or
$player_flags = bin2hex(fread($stream,1));
or
$player_flags = unpack("v*",bin2hex(fread($stream,2)));
or
$player_flags = unpack("v*",bin2hex(fread($stream,1)));
or
$player_flags = unpack("h*",bin2hex(fread($stream,2)));
or
$player_flags = unpack("h*",bin2hex(fread($stream,2)));

$player_flags = convert_flags_hlaps($player_flags);
print_r($player_flags);
?>

but results are wrong with some downloaded hotlap from lfsworld.net (on lfsworld.net page for this hotlap I see: mouse, break help, auto gear,auto clutch and left side) but my code for this hot lap shows me:Lefthand,shifter, wheel or right hand,gear change cut,auto gear,auto-clutch, KS. I tried many ways to read this but always wrong. Could You help?

#4 - filur

Sun, 5 Apr 2009 21:41

Quote from zakret :I don't know how to exactly read player flags from file



<?php 
$player_flags = array_pop(unpack('v', fread($stream, 2)));
?>

#5 - zakret

Mon, 6 Apr 2009 10:40

Thank You, very much. Now it works.

Best Regards
TZ