How do u get the Torq of a tire? There is no GetTorque function/procedure designed for vehicles and the NewtonBodyGetTorque requires a Body, and i can't work out how to get the tires body....

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-Stu

If you apply torque on a wheel it results in an angular velocity of the wheel. So use NewtonVehicleGetTireOmega (Omega is angular velocity).

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www.SaschaWillems.de | GitHub | Twitter | GPU Datenbanken (Vulkan, GL, GLES)

Omega is a small value far lower than Torq.... even doing the "speed" calculation of Radius * Omega, the "Speed" is only something like 9 and the torq is 250.

I don't get how Vehicles are ment to work, if u can't work out the Torq to re-apply to the Tires when u hit the acceleration (for a gradual speed increase)

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Free Map Editor - Game Requirements - Stucuk.Net
-Stu

Those should help you unterstand :
http://home.planet.nl/~monstrous/tutcar.html
http://phors.locost7.info/contents.htm

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www.SaschaWillems.de | GitHub | Twitter | GPU Datenbanken (Vulkan, GL, GLES)

Torq applyed has something to do with the RPM ?

Only 2 calculations looked useful:

hp = torque *rpm / 5252

and

rpm = wheel rotation rate * gear ratio * differential ratio * 60 / 2 pi

With the first being pointless since Torque is a misterious value that can't(looking at ur replys its imposible to work our the current Torque) be worked out.....



Are there any Newton examples that have been made that show how to make a car go faster than a snail?

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Free Map Editor - Game Requirements - Stucuk.Net
-Stu

If you don't want to implement a gearbox, you should do this in SetTirePhysics :



I'm doing it in a current (on hold cause of the PGD-compo) gameproject which uses a vehicle that has no gearbox (I could include one, but the user has enough to do already) and I use the above part to accelerate it. It should give you some linear acceleration, as long as the wheels don't loose grip.

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www.SaschaWillems.de | GitHub | Twitter | GPU Datenbanken (Vulkan, GL, GLES)

That was already in ur Vehicle demo... Tires loose grip if u use a value too high, but all values seem to be too low for it to go any decent speed.

In the end id just like a Vehicle that can react like ud expect any vehicle in a game. Gearbox or no gearbox. But i have no clue as how to work out the torque ud need to apply depending on what gear ur on.

Note: some modifications to the original, but basicaly the same
Note2: my "world" is about 5 times the size of the Vehicle Demo one (Car's size is multiplyed by 5, MultiSize = 5)

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Free Map Editor - Game Requirements - Stucuk.Net
-Stu

Scaling everything up by factor 5 may not be a good way. Is there any reason yo need to do that? If not, try to scale it down. Also try to change default material parameters so that the vehicle get's more grip on the floor. Also try to give the vehicle a higher mass (and maybe also the tires). Right now it's very hard to tweak a vehicle so that it also behaves like a real vehicle (especially when the bodies are bigger and so their masses are also high), but the next newton release will change that.

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www.SaschaWillems.de | GitHub | Twitter | GPU Datenbanken (Vulkan, GL, GLES)

Well think of the car as the size of an ant. Cars just way too small for the level. (defaultly)

Everything, Models, Positions, Level Geometry, Etc is based on a system where 1 is the smallest value. Resizing everything, and re-computing all the offsets, etc imo is a waste of time.

Increasing Friction doesn't get much of a boost. See the DND source for the current implementation of it.

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Free Map Editor - Game Requirements - Stucuk.Net
-Stu

"but the next newton release will change that"

1.32 seems just as imposible. Increasing the mass makes the car eather stop dead and not move (even when the torq is high) or the car bounces alot (which it can do when the car hits a ramp at a decent speed).

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Free Map Editor - Game Requirements - Stucuk.Net
-Stu