27-04-2022, 07:56 AM
(This post was last modified: 27-04-2022, 07:57 AM by josemendez.)
(26-04-2022, 05:44 PM)Natty Wrote: Still messing around with this in my test project (see pics above). Let me know when you're able to take a look, Jose. Thanks for all the input and no rush - I see you have been answering everyone that's here! Appreciate it.
Hi Natty!
Some tips regarding your setup:
- You mention the rope is very elastic, but I see you're using only 1 distance iteration on your solver. Unless you're using many substeps (at least 8) in your updater, there will be a lot of spurious elasticity in your simulation. Crank up the amount of substeps, it's a very important setting in Obi since it's the main quality -vs- performance setting. You can find it in your ObiFixedUpdater component.
The manual contains a very detailed explanation of how the solver works internally and how iterations/substeps (or timestep length in general) affect the quality of the simulation, I'd recommend taking a look:
http://obi.virtualmethodstudio.com/manua...gence.html
- Your screenshots don't show the bobber's mass or the rope's mass, but remember that large mass ratios (>= 1:10) will make it difficult for the rope to keep taut. So if your bobber's mass is much larger than the rope's, it will be more elastic than intended.
- Your cursor's parameters are both set to 0.5. This means the cursor will lengthen/shorten the rope by its middle point, by inserting copies of the particle closest to its middle. This is probably not what you want. The cursor should be much closer to the rod's tip. Take a look at the sample "Crane" scene, also see: http://obi.virtualmethodstudio.com/manua...ursor.html
let me know if you need further help,