Hello Guys,

I am trying to simulate a long cable/rope with approximately 500 units. Unfortunately, my efforts with the 3DGS engine has resulted in unpredictable behavior (wild vibrations and gaps). Does anyone have an example to get me on the right track? Thank you for your time.

-gcoakley

try using this command :

manual says :
ph_setcorrections (var ERP, var CFM);
ERP Error Reduction Parameter [0..100000], default: 20000
CFM Constraint Force Mixing [0..100000], default: 0.1

i would suggest using something like this : ph_setcorrections(8000,0.001);

also try setting ph_iterations
the higher the value the more accurate the physics will be.

but i think ph_iterations was not implemented in 6.22.0 tough ...it would be better to update to the latest version, physics are faster there

Thank you Minotaur,

ph_setcorrections did the trick. The only remaining problem is the limited number of elements in the test rope. The physics engine appears to support up to 20 without any problems (~60fps), but will drop down to 1.5-2.9 fps with more elements.

I know upgrading might help, but I am reluctant since upgrading software in the past while developing has always resulted in headaches.

-gcoakley

any idea for a NEWTON solution?!

You will not be able to get realtime performance with 500 connected units. For a rope using ph_iterations sounds like a good option.

Yes, I have recently discovered this issue. With 20 connected units in an empty level, I was able to get about 60 fps. With 25 units, the frame rate dropped to 2-3 fps. Above 25 units, 3dgs tends to crash quickly at least on my computer.

Even when running with 20 units, 3dgs cannot keep the units connected when the units are moving (approximately 4 units under ent_move). At the present, I am considering the feasibility of simulating the rope with a large model with multiple bones. Has anyone tried this approach?

-gcoakley

Not quite, ragdoll physics is meant as a replacement for traditional static death animations. I was asking if anyone created a large model such as a snake with multiple joints or bones.

-gcoakley