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+--- Thread: Tracking speed/acceleration statistics (/showthread.php?tid=1110)
Tracking speed/acceleration statistics - harurenu - 04-15-2009
Good day.
I am a computer engineering student, interested in using VDrift as a component in my group capstone project. We are assisting Kentucky Air Education in developing a driving simulator that reports pollutants/etc. outputted by the driver depending on the car.
What I am looking for is some information on tracking speed/acceleration statistics for a session. What I am thinking is I can put some custom hooks in the code where the numbers are generated for the odometer to log this information - that is of course if it doesn't already exist.
If someone could point me to the area of the source code that populates the odometer, that would be super.
Thanks in advance.
~Harlen Compton
-University of Louisville
-J.B. Speed School of Engineering
- joevenzon - 04-16-2009
In include/cardynamics.h there is a CARTELEMETRY class that is designed for this sort of thing, although you may need to extend it a bit to do exactly what you want as the current implementation is pretty basic. To enable telemetry you need to comment in SetupTelemetry() in CARDYNAMICS::SetInitialConditions(). Then, in CARDYNAMICS::SetupTelemetry(), add the parameters that you want to write to a file (the existing code there should give you an idea of what it should look like). The data will be written to some output files that are intended for use with GNUPLOT. The car's speed and acceleration are kept track of in CARDYNAMICS member variable body -- see rigidbody.h, which has accessors for velocity and position. The only caution about the current way the telemetry class is set up is that it expects a pointer to a memory location to watch, so don't give it locations of temporary stack variables.
- ntsourak - 05-08-2009
Hi!
I added this code fragment in the SetupTelemetry method:
std:
tringstream str; telemetry.push_back(CARTELEMETRY <T> ("car"));
telemetry.back().AddVariable(&(body.GetVelocity()[0]), "velocity x");
telemetry.back().AddVariable(&(body.GetVelocity()[1]), "velocity y");
telemetry.back().AddVariable(&(body.GetVelocity()[2]), "velocity z");
but in the output .dat file i always get the same value for each one of them. Is it certain that the SetVelocity method in rigidbody.h is called somewhere?
Finally is there a documentation of all the different measurements as from the names in the code it's not easy to understand their utility.
Thanks a lot for your excellent piece of work
Nikos
- joevenzon - 05-09-2009
The telemetry stuff is pretty simple; it takes a pointer to a variable and then writes the pointed to data every frame. The velocity that's returned from body.GetVelocity() is a temporary value not a reference, so storing a pointer to it doesn't work. This is a problem with the telemetry design. The telemetry class should be rewritten so that it gets a value for each variable every frame.
Unfortunately there's no documentation of the different measurements. If you can't figure them out from the function names let me know and I can decode them for you.
- ntsourak - 05-11-2009
I am interested in these variables:
telemetry.back().AddVariable(&(suspension[WHEEL_POSITION(i)].GetDisplacement()), str.str()+"-displacement");
telemetry.back().AddVariable(&(suspension[WHEEL_POSITION(i)].GetLastDisplacement()), str.str()+"-last-displacement");
telemetry.back().AddVariable(&(suspension[WHEEL_POSITION(i)].GetVelocity()), str.str()+"-velocity");
What are exactly? Is it possible to get car's speed out of these?
Is it possible to have the steering wheel angle and the car lane possition?
Thanks again!
- joevenzon - 05-12-2009
In R2445 I rewrote the telemetry system so it takes values every frame in the UpdateTelemetry() function. Uncomment UpdateTelemetry() at the end of CARDYNAMICS::Tick in include/cardynamics.h to enable it. You'll see it outputs telemetry plots with the x, y, and z velocity plus the magnitude of the velocity (the speed). Does that work better for you?
- ntsourak - 05-13-2009
I did a checkout and ran scons, This is the error log
Checking for C++ header file GL/gl.h... (cached) yes
Checking for C++ header file GL/glu.h... (cached) yes
Checking for C++ header file SDL/SDL.h... (cached) yes
Checking for C++ header file SDL/SDL_image.h... (cached) yes
Checking for C++ header file SDL/SDL_net.h... (cached) yes
Checking for C++ header file SDL/SDL_rotozoom.h... (cached) yes
Checking for C++ header file vorbis/vorbisfile.h... (cached) yes
Checking for C++ header file GL/glew.h... (cached) yes
scons: done reading SConscript files.
scons: Building targets ...
g++ -o build/boost/system/error_code.o -c -Wall -Wextra -Wno-unused-parameter -pthread -g3 -D_GNU_SOURCE=1 -D_REENTRANT -Iinclude -Isrc/bullet -I/usr/include/SDL src/boost/system/error_code.cpp
src/boost/system/error_code.cpp:12:44: error: boost/config/warning_disable.hpp: No such file or directory
In file included from src/boost/system/error_code.cpp:18:
include/boost/system/config.hpp:13:28: error: boost/config.hpp: No such file or directory
In file included from src/boost/system/error_code.cpp:19:
include/boost/system/error_code.hpp:15:29: error: boost/cstdint.hpp: No such file or directory
include/boost/system/error_code.hpp:16:28: error: boost/assert.hpp: No such file or directory
include/boost/system/error_code.hpp:17:31: error: boost/operators.hpp: No such file or directory
include/boost/system/error_code.hpp:18:33: error: boost/noncopyable.hpp: No such file or directory
include/boost/system/error_code.hpp:19:39: error: boost/utility/enable_if.hpp: No such file or directory
include/boost/system/error_code.hpp:26:29: error: boost/cerrno.hpp: No such file or directory
include/boost/system/error_code.hpp:32:68: error: boost/config/abi_prefix.hpp: No such file or directory
include/boost/system/error_code.hpp:493:70: error: boost/config/abi_suffix.hpp: No such file or directory
In file included from src/boost/system/error_code.cpp:19:
include/boost/system/error_code.hpp:57: error: âEAFNOSUPPORTâ was not declared in this scope
include/boost/system/error_code.hpp:58: error: âEADDRINUSEâ was not declared in this scope
include/boost/system/error_code.hpp:59: error: âEADDRNOTAVAILâ was not declared in this scope
include/boost/system/error_code.hpp:60: error: âEISCONNâ was not declared in this scope
include/boost/system/error_code.hpp:61: error: âE2BIGâ was not declared in this scope
include/boost/system/error_code.hpp:62: error: âEDOMâ was not declared in this scope
include/boost/system/error_code.hpp:63: error: âEFAULTâ was not declared in this scope
include/boost/system/error_code.hpp:64: error: âEBADFâ was not declared in this scope
include/boost/system/error_code.hpp:65: error: âEBADMSGâ was not declared in this scope
include/boost/system/error_code.hpp:66: error: âEPIPEâ was not declared in this scope
include/boost/system/error_code.hpp:67: error: âECONNABORTEDâ was not declared in this scope
include/boost/system/error_code.hpp:68: error: âEALREADYâ was not declared in this scope
include/boost/system/error_code.hpp:69: error: âECONNREFUSEDâ was not declared in this scope
include/boost/system/error_code.hpp:70: error: âECONNRESETâ was not declared in this scope
include/boost/system/error_code.hpp:71: error: âEXDEVâ was not declared in this scope
include/boost/system/error_code.hpp:72: error: âEDESTADDRREQâ was not declared in this scope
include/boost/system/error_code.hpp:73: error: âEBUSYâ was not declared in this scope
include/boost/system/error_code.hpp:74: error: âENOTEMPTYâ was not declared in this scope
include/boost/system/error_code.hpp:75: error: âENOEXECâ was not declared in this scope
include/boost/system/error_code.hpp:76: error: âEEXISTâ was not declared in this scope
include/boost/system/error_code.hpp:77: error: âEFBIGâ was not declared in this scope
include/boost/system/error_code.hpp:78: error: âENAMETOOLONGâ was not declared in this scope
include/boost/system/error_code.hpp:79: error: âENOSYSâ was not declared in this scope
include/boost/system/error_code.hpp:80: error: âEHOSTUNREACHâ was not declared in this scope
include/boost/system/error_code.hpp:81: error: âEIDRMâ was not declared in this scope
include/boost/system/error_code.hpp:82: error: âEILSEQâ was not declared in this scope
include/boost/system/error_code.hpp:83: error: âENOTTYâ was not declared in this scope
include/boost/system/error_code.hpp:84: error: âEINTRâ was not declared in this scope
include/boost/system/error_code.hpp:85: error: âEINVALâ was not declared in this scope
include/boost/system/error_code.hpp:86: error: âESPIPEâ was not declared in this scope
include/boost/system/error_code.hpp:87: error: âEIOâ was not declared in this scope
include/boost/system/error_code.hpp:88: error: âEISDIRâ was not declared in this scope
include/boost/system/error_code.hpp:89: error: âEMSGSIZEâ was not declared in this scope
include/boost/system/error_code.hpp:90: error: âENETDOWNâ was not declared in this scope
include/boost/system/error_code.hpp:91: error: âENETRESETâ was not declared in this scope
include/boost/system/error_code.hpp:92: error: âENETUNREACHâ was not declared in this scope
include/boost/system/error_code.hpp:93: error: âENOBUFSâ was not declared in this scope
include/boost/system/error_code.hpp:94: error: âECHILDâ was not declared in this scope
include/boost/system/error_code.hpp:95: error: âENOLINKâ was not declared in this scope
include/boost/system/error_code.hpp:96: error: âENOLCKâ was not declared in this scope
include/boost/system/error_code.hpp:97: error: âENODATAâ was not declared in this scope
include/boost/system/error_code.hpp:98: error: âENOMSGâ was not declared in this scope
include/boost/system/error_code.hpp:99: error: âENOPROTOOPTâ was not declared in this scope
include/boost/system/error_code.hpp:100: error: âENOSPCâ was not declared in this scope
include/boost/system/error_code.hpp:101: error: âENOSRâ was not declared in this scope
include/boost/system/error_code.hpp:102: error: âENXIOâ was not declared in this scope
include/boost/system/error_code.hpp:103: error: âENODEVâ was not declared in this scope
include/boost/system/error_code.hpp:104: error: âENOENTâ was not declared in this scope
include/boost/system/error_code.hpp:105: error: âESRCHâ was not declared in this scope
include/boost/system/error_code.hpp:106: error: âENOTDIRâ was not declared in this scope
include/boost/system/error_code.hpp:107: error: âENOTSOCKâ was not declared in this scope
include/boost/system/error_code.hpp:108: error: âENOSTRâ was not declared in this scope
include/boost/system/error_code.hpp:109: error: âENOTCONNâ was not declared in this scope
include/boost/system/error_code.hpp:110: error: âENOMEMâ was not declared in this scope
include/boost/system/error_code.hpp:111: error: âENOTSUPâ was not declared in this scope
include/boost/system/error_code.hpp:112: error: âECANCELEDâ was not declared in this scope
include/boost/system/error_code.hpp:113: error: âEINPROGRESSâ was not declared in this scope
include/boost/system/error_code.hpp:114: error: âEPERMâ was not declared in this scope
include/boost/system/error_code.hpp:115: error: âEOPNOTSUPPâ was not declared in this scope
include/boost/system/error_code.hpp:116: error: âEWOULDBLOCKâ was not declared in this scope
include/boost/system/error_code.hpp:117: error: âEOWNERDEADâ was not declared in this scope
include/boost/system/error_code.hpp:118: error: âEACCESâ was not declared in this scope
include/boost/system/error_code.hpp:119: error: âEPROTOâ was not declared in this scope
include/boost/system/error_code.hpp:120: error: âEPROTONOSUPPORTâ was not declared in this scope
include/boost/system/error_code.hpp:121: error: âEROFSâ was not declared in this scope
include/boost/system/error_code.hpp:122: error: âEDEADLKâ was not declared in this scope
include/boost/system/error_code.hpp:123: error: âEAGAINâ was not declared in this scope
include/boost/system/error_code.hpp:124: error: âERANGEâ was not declared in this scope
include/boost/system/error_code.hpp:125: error: âENOTRECOVERABLEâ was not declared in this scope
include/boost/system/error_code.hpp:126: error: âETIMEâ was not declared in this scope
include/boost/system/error_code.hpp:127: error: âETXTBSYâ was not declared in this scope
include/boost/system/error_code.hpp:128: error: âETIMEDOUTâ was not declared in this scope
include/boost/system/error_code.hpp:129: error: âENFILEâ was not declared in this scope
include/boost/system/error_code.hpp:130: error: âEMFILEâ was not declared in this scope
include/boost/system/error_code.hpp:131: error: âEMLINKâ was not declared in this scope
include/boost/system/error_code.hpp:132: error: âELOOPâ was not declared in this scope
include/boost/system/error_code.hpp:133: error: âEOVERFLOWâ was not declared in this scope
include/boost/system/error_code.hpp:134: error: âEPROTOTYPEâ was not declared in this scope
include/boost/system/error_code.hpp:183: error: expected class-name before â{â token
include/boost/system/error_code.hpp:230: error: âenable_ifâ in namespace âboostâ does not name a type
include/boost/system/error_code.hpp:230: error: expected â,â or â...â before â<â token
include/boost/system/error_code.hpp:244: error: âenable_ifâ in namespace âboostâ does not name a type
include/boost/system/error_code.hpp:244: error: expected unqualified-id before â<â token
include/boost/system/error_code.hpp:317: error: âenable_ifâ in namespace âboostâ does not name a type
include/boost/system/error_code.hpp:317: error: expected â,â or â...â before â<â token
include/boost/system/error_code.hpp:330: error: âenable_ifâ in namespace âboostâ does not name a type
include/boost/system/error_code.hpp:330: error: expected unqualified-id before â<â token
src/boost/system/error_code.cpp: In member function âvirtual boost:
ystem::error_condition<unnamed>:ystem_error_category::default_error_condition(int) constâ:src/boost/system/error_code.cpp:164: error: âE2BIGâ was not declared in this scope
src/boost/system/error_code.cpp:165: error: âEACCESâ was not declared in this scope
src/boost/system/error_code.cpp:166: error: âEADDRINUSEâ was not declared in this scope
src/boost/system/error_code.cpp:167: error: âEADDRNOTAVAILâ was not declared in this scope
src/boost/system/error_code.cpp:168: error: âEAFNOSUPPORTâ was not declared in this scope
src/boost/system/error_code.cpp:169: error: âEAGAINâ was not declared in this scope
src/boost/system/error_code.cpp:173: error: âEBADFâ was not declared in this scope
src/boost/system/error_code.cpp:174: error: âEBADMSGâ was not declared in this scope
src/boost/system/error_code.cpp:175: error: âEBUSYâ was not declared in this scope
src/boost/system/error_code.cpp:176: error: âECANCELEDâ was not declared in this scope
src/boost/system/error_code.cpp:177: error: âECHILDâ was not declared in this scope
src/boost/system/error_code.cpp:178: error: âECONNABORTEDâ was not declared in this scope
src/boost/system/error_code.cpp:179: error: âECONNREFUSEDâ was not declared in this scope
src/boost/system/error_code.cpp:180: error: âECONNRESETâ was not declared in this scope
src/boost/system/error_code.cpp:181: error: âEDEADLKâ was not declared in this scope
src/boost/system/error_code.cpp:182: error: âEDESTADDRREQâ was not declared in this scope
src/boost/system/error_code.cpp:183: error: âEDOMâ was not declared in this scope
src/boost/system/error_code.cpp:184: error: âEEXISTâ was not declared in this scope
src/boost/system/error_code.cpp:185: error: âEFAULTâ was not declared in this scope
src/boost/system/error_code.cpp:186: error: âEFBIGâ was not declared in this scope
src/boost/system/error_code.cpp:187: error: âEHOSTUNREACHâ was not declared in this scope
src/boost/system/error_code.cpp:188: error: âEIDRMâ was not declared in this scope
src/boost/system/error_code.cpp:189: error: âEILSEQâ was not declared in this scope
src/boost/system/error_code.cpp:190: error: âEINPROGRESSâ was not declared in this scope
src/boost/system/error_code.cpp:191: error: âEINTRâ was not declared in this scope
src/boost/system/error_code.cpp:192: error: âEINVALâ was not declared in this scope
src/boost/system/error_code.cpp:193: error: âEIOâ was not declared in this scope
src/boost/system/error_code.cpp:194: error: âEISCONNâ was not declared in this scope
src/boost/system/error_code.cpp:195: error: âEISDIRâ was not declared in this scope
src/boost/system/error_code.cpp:196: error: âELOOPâ was not declared in this scope
src/boost/system/error_code.cpp:197: error: âEMFILEâ was not declared in this scope
src/boost/system/error_code.cpp:198: error: âEMLINKâ was not declared in this scope
src/boost/system/error_code.cpp:199: error: âEMSGSIZEâ was not declared in this scope
src/boost/system/error_code.cpp:200: error: âENAMETOOLONGâ was not declared in this scope
src/boost/system/error_code.cpp:201: error: âENETDOWNâ was not declared in this scope
src/boost/system/error_code.cpp:202: error: âENETRESETâ was not declared in this scope
src/boost/system/error_code.cpp:203: error: âENETUNREACHâ was not declared in this scope
src/boost/system/error_code.cpp:204: error: âENFILEâ was not declared in this scope
src/boost/system/error_code.cpp:205: error: âENOBUFSâ was not declared in this scope
src/boost/system/error_code.cpp:206: error: âENODATAâ was not declared in this scope
src/boost/system/error_code.cpp:207: error: âENODEVâ was not declared in this scope
src/boost/system/error_code.cpp:208: error: âENOENTâ was not declared in this scope
src/boost/system/error_code.cpp:209: error: âENOEXECâ was not declared in this scope
src/boost/system/error_code.cpp:210: error: âENOLCKâ was not declared in this scope
src/boost/system/error_code.cpp:211: error: âENOLINKâ was not declared in this scope
src/boost/system/error_code.cpp:212: error: âENOMEMâ was not declared in this scope
src/boost/system/error_code.cpp:213: error: âENOMSGâ was not declared in this scope
src/boost/system/error_code.cpp:214: error: âENOPROTOOPTâ was not declared in this scope
src/boost/system/error_code.cpp:215: error: âENOSPCâ was not declared in this scope
src/boost/system/error_code.cpp:216: error: âENOSRâ was not declared in this scope
src/boost/system/error_code.cpp:217: error: âENOSTRâ was not declared in this scope
src/boost/system/error_code.cpp:218: error: âENOSYSâ was not declared in this scope
src/boost/system/error_code.cpp:219: error: âENOTCONNâ was not declared in this scope
src/boost/system/error_code.cpp:220: error: âENOTDIRâ was not declared in this scope
src/boost/system/error_code.cpp:224: error: âENOTRECOVERABLEâ was not declared in this scope
src/boost/system/error_code.cpp:225: error: âENOTSOCKâ was not declared in this scope
src/boost/system/error_code.cpp:226: error: âENOTSUPâ was not declared in this scope
src/boost/system/error_code.cpp:227: error: âENOTTYâ was not declared in this scope
src/boost/system/error_code.cpp:228: error: âENXIOâ was not declared in this scope
src/boost/system/error_code.cpp:232: error: âEOVERFLOWâ was not declared in this scope
src/boost/system/error_code.cpp:233: error: âEOWNERDEADâ was not declared in this scope
src/boost/system/error_code.cpp:234: error: âEPERMâ was not declared in this scope
src/boost/system/error_code.cpp:235: error: âEPIPEâ was not declared in this scope
src/boost/system/error_code.cpp:236: error: âEPROTOâ was not declared in this scope
src/boost/system/error_code.cpp:237: error: âEPROTONOSUPPORTâ was not declared in this scope
src/boost/system/error_code.cpp:238: error: âEPROTOTYPEâ was not declared in this scope
src/boost/system/error_code.cpp:239: error: âERANGEâ was not declared in this scope
src/boost/system/error_code.cpp:240: error: âEROFSâ was not declared in this scope
src/boost/system/error_code.cpp:241: error: âESPIPEâ was not declared in this scope
src/boost/system/error_code.cpp:242: error: âESRCHâ was not declared in this scope
src/boost/system/error_code.cpp:243: error: âETIMEâ was not declared in this scope
src/boost/system/error_code.cpp:244: error: âETIMEDOUTâ was not declared in this scope
src/boost/system/error_code.cpp:245: error: âETXTBSYâ was not declared in this scope
src/boost/system/error_code.cpp:249: error: âEXDEVâ was not declared in this scope
include/boost/system/error_code.hpp: At global scope:
include/boost/system/error_code.hpp:211: warning: âboost:
ystem::posix_categoryâ defined but not usedinclude/boost/system/error_code.hpp:212: warning: âboost:
ystem::errno_ecatâ defined but not usedinclude/boost/system/error_code.hpp:213: warning: âboost:
ystem::native_ecatâ defined but not usedscons: *** [build/boost/system/error_code.o] Error 1
scons: building terminated because of errors.
- joevenzon - 05-13-2009
Sorry, I tried to partially add some of boost due to other stuff I was working on, but now with R2453 I've added a full boost dependency. So install boost (on ubuntu 9.04, sudo apt-get install libboost-dev) and see if that works.
- ntsourak - 05-14-2009
New problem....:
scons: Reading SConscript files ...
Checking for C++ header file boost/asio.hpp... no
You do not have the boost/asio.hpp headers installed. Exiting.
I have Ubuntu 8.04 - the Hardy Heron and it seems i can only install 1.34.1 boost library :?
The asio library is not included in this package.
- alex25 - 05-14-2009
ntsourak Wrote:scons: Reading SConscript files ...libasio used to be a separate package. try installing libasio-dev (at least debian has such a package) and then change boost/asio.hpp to asio.hpp (in the code as well). that should work.
Checking for C++ header file boost/asio.hpp... no
You do not have the boost/asio.hpp headers installed. Exiting.
I have Ubuntu 8.04 - the Hardy Heron and it seems i can only install 1.34.1 boost library :?
The asio library is not included in this package.
--alex--
- ntsourak - 05-15-2009
Ok I intalled libasio-dev and did some hacking in the code in order to work.
joevenzon:
I get results in telemetry.dat file and i have two questions.
1)The velocity in the last column is not the one depicted in the speedometer. I reach to speeds up to 60 MpH but i don't see these high values in the file.
2)Can you explain a little bit what is the velocity of the wheel in the 3-axis. Is it possible to related it somehow with the angle of the wheel?
Thanks a lot guys for your immediate responses!
- joevenzon - 05-15-2009
Ah, the units in the file are meters per second. I guess I should have mentioned that.
The X Y Z velocity units are in world space; that is, if the car is traveling in exactly the +X direction in vdrift, the X velocity will be some number and the Y and Z values will be zero. If you start going up a hill, the X value will decrease slightly and the Z value will increase (Z is up).