James, are your scripts open for us to view and work with? Regards/ Void Pipe
7 jun 2012 kl. 13:30 skrev James Stallings II: > I've been working with vehicle scripting on opensims now for over 4 years. > There are lots of historical scripts I have written or adapted from the work > of others, or collaborated on with others in the OSgrid scripting forums. > These include sailing scripts, automobile scripts, and yes, even a helicopter > script. Dave Coyle said over three years ago that my helicopter was "the most > satisfying vehicle he'd ever seen on an opensim'. > > In fact, Owen Oyen and I produced the first vehicles on OSgrid *without any > vehicle functions at all*. These were sailboats that entirely simulated > 'sailboat physics' using llSetRot, llGetRot, llApplyImpulse and friends. The > boat was clunky, did not heel, moved in anything but a smooth fashion, and > was hell on the simulation. My more 'modern' boats can be found on > Littlefield region on OSgrid, as well as a historical display documenting the > work on the aquavita. The working copies of the boats are in a vendor; those > sitting at the dock have had the scripts ripped out to reduce lag on the sim, > don't take copies of those. > > Later (much later than that boat, the 'Aquavita"), I worked extensively with > Kitto Flora to get ODE implemetations of such vehicle scripting functions > working as work now. The work is imperfect, but not all of the problems are > with ODE proper; some have to do with various math functions' implementation > in opensim, and how they differ from the same math functions as implemented > in SL under havoc. The short story is, LL's functions are broken in terms of > how physics actually dictates real-world objects behave; and the same > functions are incomplete here, as the developers who worked on them refused > to implement the broken math, and no resolution could be reached among the > devs as to how to proceed, so the functions on opensims are incomplete and/or > unfinished. > > All of this is more or less ancient history. I've got many very simple test > objects needed to reproduce these errors as test cases in inventory on the > grid, and related mantis entries filed, but quite frankly they've been > ignored for so long I lost interest a couple years back and haven't really > bothered with vehicles since. Who wants to sail a boat that doesn't heel? Who > want's to fly an airplane that has no inertia if a vector component is on the > z-axis? Not to mention, incoming physics 'fixes' often break the workarounds, > with no explanation of how to take advantage of the improvements. > > It's really discouraging to be told about your now non-functional helicopter > you've been using for most of a year that 'those vehicle functions never > really worked anyway'. > > One of the problems is that to make something work you have to be able to > define 'working' in a manner that lends itself to implementation by nuts and > bolts coders, and (so far) no one has presented themselves that has that sort > of exhaustive knowledge of LL's vehicle physics. > > I'm not a nay-sayer; I really hope this stuff can be made to work someday; > but I long ago lost hope as I'll likely be dead and buried before it happens > at current rates of development, especially if everyone forgets or ignores > all the prior work that has been done or that the issues raised are not so > new as the users encountering them. > > I'm available to help with this, as much or as little as is needed, but > you'll have to be patient with me as, at this point, I've largely forgotten a > lot of what I knew about this, having given up on going blue in the face > trying to get anyone to take notice of the issues I was raising. > > > Cheers > James aka Hiro Protagonist > > > On Thu, Jun 7, 2012 at 4:38 AM, Bengt Falke <[email protected]> wrote: > This is getting more and more interesting for each post on the subject...... > > I think it would be a good thing to collect all the relevant information > about physics and scripting in the forum so it is available to all struggling > with this. Are there still active work going on with ODE or are our only > option to find ways around the problems or hope for the Bullet engine? > > I saw in another post a reference to a OSGrid scripting forum and I assume it > is this section you are referring to (please correct me if I am wrong): > http://forums.osgrid.org/viewforum.php?f=5&sid=d584d594240e0917e41480491af385ec > > That might anyhow be a good place to post in. > Void Pipe > > > > > _______________________________________________ > Opensim-dev mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/opensim-dev > > > > -- > =================================== > http://simhost.com > http://twitter.com/jstallings2 > http://www.linkedin.com/pub/5/770/a49 > _______________________________________________ > Opensim-dev mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/opensim-dev
_______________________________________________ Opensim-dev mailing list [email protected] https://lists.berlios.de/mailman/listinfo/opensim-dev
