Hello, I'm new with newton.

[Ivan Mandić]

I have a few questions.

1.If my FPS isn't static is there a way to calculate how many times do I need to call NewtonUpdate,and with what TimeStep? (I know my fps every time I do NewtonUpdate)
2.What are the beast setting for realtime physic(ingame)? Any tips? I have set NewtonSolverModel to Linear mode,NewtonPlatformArchitecture mode to 2,and I'm using multiple threads.
3.Can I use Newton2 in any project,for free?

Thanks.

[JernejL]

I have a few questions.

1.If my FPS isn't static is there a way to calculate how many times do I need to call NewtonUpdate,and with what TimeStep? (I know my fps every time I do NewtonUpdate)
2.What are the beast setting for realtime physic(ingame)? Any tips? I have set NewtonSolverModel to Linear mode,NewtonPlatformArchitecture mode to 2,and I'm using multiple threads.
3.Can I use Newton2 in any project,for free?

Thanks.

1. You usually call newtonupdate just once, with a different timestep parameter, time-slicing (calling update several times) is used when specific problems are encountered and is usually employed for professional simulations, not games.
2. it really depends on what kind of simulation you want, if you want precision or speed, you obviously prefer speed with those settings.
3. yes, see license.

about timestep.. a usual approach is, to use time passed since last frame.

[Ivan Mandić]

I lock fps to 60, and I use NewtonUpdate like this:"NewtonUpdate (nworld, (1.0f/60.f));" But it's just too slow.
p.s.
I think that maybe problem is in size of my cubes, I'm testing with boxes in size of 20x20x20..It look's ok if I multiple mass*gravity with 10.

[JernejL]

Do your bodies have set appropriate intertia matrix? also you may be using excessive linear damping?

[Ivan Mandić]

Problem is that object size 20x20x20 looks small in my level. (If I'm right that is size of 20m in newton)
So if gravity is only 9.81m/s it's looks like the object acceleration is 9.81 cm/s and not 9.81 m/s.
And if I make small object in size of 2x2x2 ,and zoom camera to it, speed is ok but that object is too tiny.. I need to make newton think that object 20x20x20 is small and not big.

[Julio Jerez]

if you object is 20 x 20 x 20 it will be 20 mter in newton,
a gravity of 9.8 wiol be too small

you can operate in a two scale factor in newton you body to 0.2 x 0.2 x 0.2
or make your gravity 9.8 * 100 = 980 but tah may bring soem problems with the engine (you coudl try)

I recomend making the body .2 x.2 x .2, by using a Scale factor for every thing.
basially you mutiply everything by 0.01 in when you pass a parameter to the engine and you multiply by 100 when you read a value foprm the engine.

[Ivan Mandić]

I did that with scale at he first place but i didn't know is it right solution for that problem.
I did try to set gravity to 981.0m/s but object behaved strangely.
Thanks for help guys.