[GUIDE] [1.19.2.1] Vehicle physics explained.

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Cadde
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Re: [GUIDE] [1.19.2.1] Vehicle physics explained.

#21 Post by Cadde » 28 Aug 2015 14:03

das alright.
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natvander
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Re: [GUIDE] [1.19.2.1] Vehicle physics explained.

#22 Post by natvander » 29 Aug 2015 11:35

So what's the difference between the (hidden) engine brake settings in the engine file and thrust_characteristic_viscosity_factor (intensity of engine brake) in the physics file?
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Re: [GUIDE] [1.19.2.1] Vehicle physics explained.

#23 Post by Cadde » 29 Aug 2015 16:01

I don't know the formula used, but i can assume that parameter is a part of the formula.

The one in the physics file is global to all engines whereas the one in the engine is specific to that engine.

Setting the one in the physics file to 2.0 makes all motor/exhaust/jake brakes 200% as effective.
Setting the one in the engine file to 2.0 makes the motor/exhaust/jake brake 200% as effective for that engine only.

Setting BOTH to 2.0 makes all other engines 200% as effective and that one engine you altered to be 400% as effective as normal.
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Re: [GUIDE] [1.19.2.1] Vehicle physics explained.

#24 Post by airbus_sai » 29 Aug 2015 16:22

Thanks Cadde, this is very helpful.

But looks like text of physics.sii is actually from chassis.
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Re: [GUIDE] [1.19.2.1] Vehicle physics explained.

#25 Post by Cadde » 29 Aug 2015 16:53

But looks like text of physics.sii is actually from chassis.
Oh my ...
Image

Fixed it!

In my defense, editing the first post is confusing. It was there from the start but after editing all files i must have pasted the wrong file in the wrong code section.

I just wish someone would have let me know sooner.
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Re: [GUIDE] [1.19.2.1] Vehicle physics explained.

#26 Post by airbus_sai » 29 Aug 2015 17:49

Now it's even more helpful. :)

I just found that "bristle" in the lower lines of physics.sii is googleable by "radial bristle brush", and behaves like this: http://www.youtube.com/watch?v=jCs0nh-l8ms
So stiffness is how hard it will be to bend these wires in the brush, and damping is how well it will return to original shape.
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Re: [GUIDE] [1.19.2.1] Vehicle physics explained.

#27 Post by Cadde » 29 Aug 2015 20:38

Yes but in the game there are not bristles per say. It's just a formula.
There's no bending going on, just forces being applied in the physics engine.
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Re: [GUIDE] [1.19.2.1] Vehicle physics explained.

#28 Post by Tuddley3 » 30 Aug 2015 00:56

Where is the entry for AI Vehicle volume? I'm looking to increase the volume of AI cars driving by, I would imagine it would have something to do with tires.
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Re: [GUIDE] [1.19.2.1] Vehicle physics explained.

#29 Post by Cadde » 30 Aug 2015 04:34

Tuddley, in two places that i know of currently.

"/def/game_data.sii" near line 105:

Code: Select all

	interior_sound_volume:	0.05	// Interior sound attenuation value (the outside sounds will have 5% of original volume)
Which affects the volume of outside vehicles (and such) when using the inside camera.

And the various sound files for AI vehicles in the "/sound/ai" folder.
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Re: [GUIDE] [1.19.2.1] Vehicle physics explained.

#30 Post by raventes » 30 Aug 2015 05:34

What are these options and how well it set up?

# coefficients related to wheel slipping
slip_longitudinal_factor: 1.0
slip_lateral_factor: 1.0

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