@stenyak@mastodon.gamedev.place
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stenyak

@stenyak@mastodon.gamedev.place

Driving sim developer at BeamNG. Car/tech/space/computers/science nerd.

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stenyak, to random
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Sneaky bug of the day:

stenyak,
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@gob reject json, embrace sjson!
http://bitsquid.blogspot.com/2009/10/simplified-json-notation.html
we use a format similar to sjson at beamng, where commas are optional (or you can add trailing commas if you want).

msvs compiler also accepts trailing commas (which i learnt while bugfixing this), although i'm not sure if that's c++ spec or msvs-specific.

stenyak, to random
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Routinary inspection before a quick trip to the ring... Who needs bumpstops through carousel?

image/jpeg

stenyak,
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@gob if the suspension is correctly designed, bumpstop should handle the transition from springy springs to fully solid springs, acting as a sort of progressive spring. though it's certainly possible for an improperly setup suspension height to bypass the bumpstop entirely, making them useless

stenyak, to random
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Really happy and thankful that we can be helping @ocornut and his awesome and extremely useful Dear ImGui library - We use it all the time here at Beamng!

https://mastodon.gamedev.place/@ocornut/112253108123981166

stenyak, to random
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Current status: adjusting my driving line when hotlapping in the now-outdated laser scans of the ring - mentally preparing for the next time I visit the track IRL, so I don't risk a rapid unscheduled disassembly of oil pan with the new suicide kerb after foxhole.

j_bertolotti, to physics
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A quantum simple pendulum.
The pendulum position is spread out, with opacity here being proportional to the probability that the pendulum is at that position at a given time. The average position of the quantum dynamics is the same as the classical pendulum dynamics (Ehrenfest theorem).

Technicalities: I used the Crank-Nicholson method to evolve the system in time. This is a 1D problem, and the only variable I considered was the angle, with the initial state being a Gaussian.

Schematic drawing of a simple pendulum oscillating, with its quantum version represented as a distribution of pendula with their transparency proportional to the probability to be at a certain position at any given time.

stenyak,
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@johncarlosbaez @j_bertolotti I have no clue about quantum mechanics, but I understand that even under those conditions, the top-position is still the one where speed is the lowest... therefore the pendulum spends more time there so gets "sampled" more often?

stenyak, to random
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Appealing to the masses while retaining realism can be hard... I remember netKarPro had 1 page of instructions on how to start the formula car engines!
In BeamNG.drive we're also forced to educate people on how some vehicles are operated IRL, compared to vast simplifications in games.

stenyak,
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I include myself in that group of people BTW, it's rare to know everything!

Cool thing is, you can direct people to a random web search for real vehicles, and the solution will often apply to our sim too.

E.g. "Why does this car pull to a side when I blindly lift its suspension?"

stenyak,
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Our latest truck-themed BeamNG.drive
update (released just now) is the perfect example. You cannot expect most people to know any of this stuff! https://www.youtube.com/watch?v=0kaetAfvM0E

stenyak,
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@gob glad you like it! And yes, I wrote my post while watching an internal preview of this exact educational video...

stenyak,
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@gob wet dreams, because of the sphere circuit leaking am i right :D

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