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NEW : Instant Hotlap Analyser at LFS World
(235 posts, started )
NEW : Instant Hotlap Analyser at LFS World
Hello all,

There is a new feature on LFS World, i guess primarily for the hotlappers amongst us. It is a hotlap analyser made in Flash that allows you to just select two hotlaps from a chart and analyse them.

You can find it if you go to www.lfsworld.net , open the hotlaps section / hotlap charts, select the hotlap chart of your liking, select two racers for comparison (click the C's next to a racer's flag) and finally click the Instant Hotlap Analyser button that appears to the right (under the quick compare). A new window will open with the Flash analyser.

When the window opens, the selected hotlaps will be loaded. This can take a couple of seconds, even though we have reduced the RAF filesize tenfold.
Speaking about RAF's, we convert all hotlaps from SPR to RAF in the background. When you upload your hotlap, a RAF file will be generated within a minute. RAF files contain a lot of data about your hotlap, which can be used for analysis.

The hotlap analyser for now is in BETA stage. Or well, actually alpha, because there's one feature still missing. But because I cannot get my head around how to display some data, I thought I'd just throw it out there for suggestions.
The missing feature is Wheel Info. You can select it, but it's not good. It works, but it lacks information.
Thing is, it shows you a top-view of your wheels. You can see forces acting on them and you see the air temperature inside the tyres. Problem is, this is not all information available. There is also vertical load and i could display suspension movements.
I thought it would be nice to put it all in one screen, Wheel Info. But perhaps i just need to make two screens, one for top view and one for rear view. But even then i'm not sure how to actually display it

So to conclude, the Hotlap Analyser works fine, but it needs some things still and i was hoping by making the application public, some good comments and suggestions might come in.

NOTE (1) - Some hotlaps will not load in the analyser. This is because they don't exist. Now that we have a background RAF exporter, we can also do actual HLVC (HotLap Validity Check) and OOS (Out Of Sync) checks. Since Scawen improved the wall detection for example, some hotlaps have become HLVC invalid and will soon be removed. The same thing goes for OOS checks. A hotlap going OOS is normally due to the use of cheats. This way we can make sure the hotlap charts will remain cheat free. More on this topic later when we will do the actual removing of the invalidated hotlaps.

NOTE (2) - The setup values controversy.
The idea behind RAF files and this hotlap analyser is to stimulate people to study their driving skills. Because hotlap analysis is now as easy as a couple of clicks, it should become much more attractive and fun to learn how to improve your driving. Part of this is studying basic setup settings. Yes some people regard full suspension values as too much, but it is only half of the full setup, and it is the part that people can learn the most from. Seeing why someone uses a softer or harder suspension on a certain track allows them to better see how suspension works and that it should not be the same for all tracks. These values can also be used in addition with the suspension movement and remaining range graphs in the analyser.
If you really feel that it is a breach of your privacy and do not wish others to learn from your hotlap, then you should not upload your hotlaps to LFS World, or anywhere else for that matter, because these values have been in RAF files ever since the format was created. I don't think we will remove them either.

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I have attached an image with some explanations as to what the buttons at the top of the hotlap analyser do.
Attached images
ButtonsExplained.png
Perfect! Thanks!
Wow
Wooo! Nice work as usual Victor :up:
Well, what can I say.

Awesome.

E: Is it intended that parts of the suspension setup are viewable?
E2: Apparently it is :doh:
Brilliant work !!

I particularly like the fact that you can now download the lap in RAF format without having to sit through a replay and create it yourself.
A lot of useful info in there and no need to download a stand alone analyser any more, great stuff.
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Also, do the forces in the wheel view correspond to LFS' display? Meaning when you accelerate the bars point forward.

Also wouldn't it be more logical to put the front wheels on top? At least when watching a XFR hotlap it's weird that the bottom wheels show all the action - I think top and bottom is reversed there, to be honest.
the front wheels are on top. And yep, the forces point the same way as in LFS (well i checked that back when i made that view)

EDIT - uh wheels are at the bottom all of a sudden .. ehm, ok my bad somehow
Fantastic work Victor, as usual......
They are okay for the XRT for example, but they're reversed on XFR. Haven't yet checked any other cars, maybe just a minor oversight.
Thats a really nice bit of coding, and a really usefull, easy to use and quick tool.
Quote from AndroidXP :They are okay for the XRT for example, but they're reversed on XFR. Haven't yet checked any other cars, maybe just a minor oversight.

yeah it appears some cars are reversed. Will look into this soon.
Dude that's awesome I love it!!!
Would it be possible to release a stand alone version for local use? So I could compare 2 of my own runs and see where I'm constantly changing my driving style

Apart from that, really nice stuff Vicc
Made a quick check, seems cars with reversed wheel layout are: XFG, XFR, UF1, UFR
wow! impressive!!
Wow... great stuff Victor
Thanx!
Really like this. There is one thing I miss, when driving GPL there was a program where you could compare laps and in that program it was possible to "see" the speed difference on track with different colors.

keep up the good work!
Too much pretty tables and numbers, takes awhile to figure them all out Thanks for making hotlap viewing easier!
I have to ask ...

Why isn't there an 'Announcements' forum section for threads like this?
Very nice!! Awesome job.
1 suggestion though: for some of the people who would like to see the "traction circle of things".. can you make the little black balls in the G-meters leave a thin trace line that would stay there for like 1 second? So it keeps drawing it, but old parts of the line get deleted as the car drives on. And maybe this too, depeding on the car's ability to pull a G amount, draw a circle with that G value that would remain permanent. So for regular cars it can be at 1.05 or 1.10 G, and for FZR or BF1 it can be 3/4.. basically read the maximum value of the lateral G from the raf and draw a circle with that radius. Can this be done?
Quote from OldBloke :I have to ask ...

Why isn't there an 'Announcements' forum section for threads like this?

When it's done, i was planning a news item on lfs.net about it.

Quote from scipy :1 suggestion though: for some of the people who would like to see the "traction circle of things".. can you make the little black balls in the G-meters leave a thin trace line that would stay there for like 1 second? So it keeps drawing it, but old parts of the line get deleted as the car drives on. And maybe this too, depeding on the car's ability to pull a G amount, draw a circle with that G value that would remain permanent. So for regular cars it can be at 1.05 or 1.10 G, and for FZR or BF1 it can be 3/4.. basically read the maximum value of the lateral G from the raf and draw a circle with that radius. Can this be done?

I think that's possible yes. Noted.
Quote from AndroidXP :Made a quick check, seems cars with reversed wheel layout are: XFG, XFR, UF1, UFR

thanks. The cars should all face the same way now.

NEW : Instant Hotlap Analyser at LFS World
(235 posts, started )
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