New Sim Demo :)

Hi Folks, I have just released the new version of my demo ( http://www.siroccoracing.com ). It has been much improved in this release in terms of physics and program stability. I got rid of some nasty memory bugs. I have also added: - - Primitive suspension / weight distribution - Aero Resistance - Keyboard Support (re-added) as well as a slightly improved calibration program (i havent had a chance for a full overhaul!) - Engine Braking I hope you like it, let me know how you get on :) REMEMBER : You need Directx 8.1 All the best, Ash http://www.siroccoracing.com

On Mon, 20 May 2002 23:53:57 +0100, "Ashley McConnell" <[email hidden]> wrote: >Hi Folks, > >I hope you like it, let me know how you get on :) Hello, well, i only try with the keyboard because i'm at work , and i can''t even get the car to move. I can rev up/down the engine with Q, but when i geared up the car stalled. The rear wheels act strangely it's seems they oscilate ... but i'm not sure maybe they roll very fast. So the only thing i can say about the physics is that i think the engine has not enough inertia.. i'mean do the engine should take more time to get back to low rev when i release the throttle ?

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> >REMEMBER : You need Directx 8.1 > >All the best, >Ash >http://www.siroccoracing.com > >

> well, i only try with the keyboard because i'm at work , and i can''t > even get the car to move. > > I can rev up/down the engine with Q, but when i geared up the car > stalled. I have some "issues" at or near zero velocity, I hope to solve them soon by using the Relaxation Length method. However, I have added a forward impulse near zero when the thottle is pressed (just to get it going), it should actually move. Try engaging gear straight away and then acclerating and holding the accelerator. > > The rear wheels act strangely it's seems they oscilate ... but i'm not > sure maybe they roll very fast. I think this might be the same "near zero" problems with slipratio. > > So the only thing i can say about the physics is that i think the > engine has not enough inertia.. i'mean do the engine should take more > time to get back to low rev when i release the throttle ? > Ok, noted down, i'll get to it! Thanks for trying it, I can assure you it doesnt feel too bad once you get it moving!! :) Al l the best, Ash http://www.siroccoracing.com

>I have some "issues" at or near zero velocity, I hope to solve them soon by >using the Relaxation Length method. However, I have added a forward impulse >near zero when the thottle is pressed (just to get it going), it should >actually move. Try engaging gear straight away and then acclerating and >holding the accelerator. I tried every thing i have in mind, even hold accelerator and change gear lot of time, i also try to press quickly the accelerator, the car dont move :(

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>> So the only thing i can say about the physics is that i think the >> engine has not enough inertia.. i'mean do the engine should take more >> time to get back to low rev when i release the throttle ? > >Ok, noted down, i'll get to it! > >Thanks for trying it, I can assure you it doesnt feel too bad once you get >it moving!! :)

For sure i didn't crash in any wall ;o)

> I tried every thing i have in mind, even hold accelerator and change > gear lot of time, i also try to press quickly the accelerator, the car > dont move :( > It seems to work here fine, and at home :/ what you could try (although its a little bit of a pain). Set the starting position of the car a little off the ground. i.e. : - - change the file ./demo014/Cars/Lmp/car.ini - change startposy = 0 to startposy = 10 This should make the car move forward a little when it bounces and stop the velocity from being zero. I will try and implement the relaxation stuff tonight, although I am feeling a bit under the weather at the minute :( All the best, Ash http://www.siroccoracing.com

"Ashley McConnell" wrote... > <snip> > I hope you like it, let me know how you get on :) > > REMEMBER : You need Directx 8.1 Nice, very nice... car is a lot more controlable. Getting more feedback as well, but predicting when the limit is going to be overstepped is still fairly hard. That said, once lost it's quite easy to power spin it back facing the right way. The car indeed doesn't launch immediately, is sort of sits there, loads up it's suspension and, after maybe a second it breaks the rear tyres loose and starts moving, the wheels eventually "catching" up with road speed in a very GPL like manner (quite cool). Excessive coasting hhas been resolved as well. You're getting there Ash. As before, I remain to be very impressed. Perhaps a dunb question from an ignoramus sim user (rather than sim coder): wouldn't it be easier to implement a (digital) clutch/engine stall and have the user deal with stuff like launching the car, blipping downshifts, etc... to begin with, moving on to implementing driving aids at a later stage? Similar to the development of real cars where the very first models relied on the user and his passenger/mechanic to control all aspects of the vehicle/engine, with more and more things getting automated as things progressed. Jan. =---

Hi, i re-tried today and know its working without modification ... i'll retry later with a sterring wheel for some feeback ;o) cheer,

"Sebastien Tixier" <stixier@wanadoo[NO_SPAM].fr> wrote in message news:[email hidden]...

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> Hi, > > i re-tried today and know its working without modification ... > > i'll retry later with a sterring wheel for some feeback ;o) > > cheer,

Hurrraaaaay! :) I worked a little on the relaxatioin stuff last night, but in my dazed state I used the "SlipAngle equation" to calculate the SlipRatio (I only realised this morning, DOH!). I should fix it in 10 mins tonight (hopefully) and this should let it take off from rest a little more easily. Let me know how you get on with the wheel :) All the best, Ash http://www.siroccoracing.com

"Jan Verschueren" <[email hidden]> wrote in message news:[email hidden]...

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> "Ashley McConnell" wrote... > > <snip> > > I hope you like it, let me know how you get on :) > > > > REMEMBER : You need Directx 8.1 > > Nice, very nice... car is a lot more controlable. Getting more feedback as > well, but predicting when the limit is going to be overstepped is still > fairly hard. That said, once lost it's quite easy to power spin it back > facing the right way. > > The car indeed doesn't launch immediately, is sort of sits there, loads up > it's suspension and, after maybe a second it breaks the rear tyres loose

and > starts moving, the wheels eventually "catching" up with road speed in avery > GPL like manner (quite cool). Excessive coasting hhas been resolved aswell. > > You're getting there Ash. As before, I remain to be very impressed.Perhaps > a dunb question from an ignoramus sim user (rather than sim coder):wouldn't > it be easier to implement a (digital) clutch/engine stall and have theuser > deal with stuff like launching the car, blipping downshifts, etc... tobegin > with, moving on to implementing driving aids at a later stage? Similar to > the development of real cars where the very first models relied on theuser > and his passenger/mechanic to control all aspects of the vehicle/engine, > with more and more things getting automated as things progressed. > Hi Jan, Whoops, missed this one! :) I think that predicting the limit will be made easier with the aid of tyre squeal and perhaps a little practice. I find I can throw it round fairly easily now as I have been driving it quite a bit (as you can imagine!). I even stuck a 600HP engine in that monster last night and didnt spin *too* often :). I had the aid of some pseudo-downforce to aid my travels though :) (not in the demo) My launch control isnt exactly perfect is it? Well if F1 teams need 2 seasons I think i am doing alright <g>. I am working on the "relaxation length" method which is much better at low speeds and better behaved @ v = 0. Still having a few probs, but i'll sort it :). Anything that is GPL-like is nice to see, its a great benchmark :). I have been thinking about how I can implement the clutch, so it feels ok (on the way home on the train), I think I have figured something out, I will try it out after the relaxation length stuff. Thanks for your kind words and suggestions, they are always welcome. I removed a few "for a car with no...." statements :) I am becoming even more excited, its starting to come together a little. All the best, Ash http://www.siroccoracing.com

"Ashley McConnell" wrote...

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> <snip> > Hi Jan, > > Whoops, missed this one! :) > <promising stuff snipped> > Thanks for your kind words and suggestions, they are always > welcome. I removed a few "for a car with no...." statements :) > I am becoming even more excited, its starting to come together > a little.

I find all this home brew development very exciting and interesting. I may be an eternal optimist, but the way things are going now I see us arriving at being independant on corporations for our sim fix within a decade. ;-) Anyhow... forgot to ask: is it possible to swap the gear up/down controls when using a wheel? -If not now, could you include the option in future releases? Thanks, Jan. =---

> I find all this home brew development very exciting and interesting. I may > be an eternal optimist, but the way things are going now I see us arriving > at being independant on corporations for our sim fix within a decade. ;-) > I would love to do this full time, but I cannot justify it to myself until I am at a much later stage (maybe 2-3 years?) > Anyhow... forgot to ask: is it possible to swap the gear up/down controls > when using a wheel? -If not now, could you include the option in future > releases? Not a problem - edit the txt file ./data/joystick.dat ChangeDown = 1 ChangeUp = 0 ....if you simply want to swap them this should do the trick: - ChangeDown = 0 ChangeUp = 1 Unfortunately, if you need to calibrate again it will wipe the current file - but at least there is split axis right? :) I will redo the whole calibration thing to make it a little more robust when I get a minute. I also need to add multiple controllers for my shiny new act labs pedals :) Thanks again for the kind words Ash http://www.siroccoracing.com