world coordinates of tracks

[Shun Sasai]

Could somebody please teach me how to know the world coordinates of a track? I have to use a car position in a track. I know that we can easily know that as "u" in log files, although log files in old version (v0.5.4.3 for Mac) does not have "u" in it. Any information would be appreciated.

 

[Mr Whippy]

What exactly do you want to know?

The car position in world coordinates? Or where the track origin is?

Dave

 

[Shun Sasai]

Thank you so much for your consideration, Dave.

I would like to know the lateral position of car on the track. I'm using a track where there are two lanes divided by a yellow center line, and I would like to measure deviations from the center lane during driving. The track was downloaded via internet (http://www.xtremeracers.info/web/in...&Itemid=63&view=viewdownload&catid=20&cid=872).

The lateral position of car could be obtained as an index "u," if you used newer version of Racer. However, there is an error in back ground scenery, and I could not find the way to fix it. Also, there is nice smoke in newer version, although I would like to remove the smoke effect (I also don't know how to fix it). Attached figures are instances (upper for back ground, lower for smoke). Therefore, I gave up using new one and am looking for the way to calculate deviation by using both car position in world coordinate and that of center line of the track.

Shun

 

[Mr Whippy]

OK so you want a live readout of the lateral position on the track that you can then use elsewhere... does it have to be logged or real-time?

Thanks

Dave

 

[Stereo]

The problem with the background is cause of the skybox, it's a bit of work to update (easiest way is to copy the one Carlswood uses, but it lives in ~5 files)

 

[Shun Sasai]

Dear Dave,

Exactly. I'll analyze the lateral position after I played simulator, so I need a record of that such as a log file.

Shun

 

[Shun Sasai]

Dear Stereo,

thank you so much for providing the information. But...could you please give more information of that? Usage of Carlswood one is fine for my aim. But I don't know which files I should move to which directory...

Shun

 

[Stereo]

From \data\tracks\carlswood_nt
sky_clouds.tga
sky_night.tga
sky.dof

Copy those to the new track folder, then in the new track, open track.shd and add or replace:

vf_sky
{
  vertex_shader
  {
    ;file=sky_daynight_v.cg
    file=sky_v.cg
  }
  fragment_shader
  {
    ;file=sky_daynight_f.cg
    file=sky_f.cg
  }
}

shader_sky~vf_sky
{
  sky=1
  cull=none
  compression=0
  layer0
  {
    map=sky_clouds.tga
    depthwrite=0
    depthfunc=always
  }
  layer1
  {
    map=sky_night.tga
    depthwrite=0
    depthfunc=always
  }
}

(if the 'shader_sky' section exists replace it)


and in the new track's geometry.ini add/replace

  sky01
  {
    file=sky.dof
    flags=0
  }

You can open the geometry.ini of Carlswood to see where it goes if you need to.

 

[Shun Sasai]

Dear Stereo,

many thanks for your help and kindness! I could fix the background by following your instruction!! I'm really glad to do it. Thank you so much!

Shun