Re: [gmx-users] nonbond_params directive

2018-07-28 Thread Eric Smoll
Hi Justin, No problem. Thanks for the clarification. I think I understand now. Best, Eric On Sat, Jul 28, 2018 at 6:39 PM, Justin Lemkul wrote: > > > On 7/28/18 8:35 PM, Eric Smoll wrote: > >> Justin, >> >> Thank you for the guidance. >> >> "You simply supply whatever the LJ combination shou

Re: [gmx-users] nonbond_params directive

2018-07-28 Thread Justin Lemkul
On 7/28/18 8:35 PM, Eric Smoll wrote: Justin, Thank you for the guidance. "You simply supply whatever the LJ combination should be for the 1-4 pair. If you want 0.5 times what is listed, change the values." But this would change the LJ interaction for 1-4 pairs and all other pairs that are

Re: [gmx-users] nonbond_params directive

2018-07-28 Thread Eric Smoll
Justin, Thank you for the guidance. "You simply supply whatever the LJ combination should be for the 1-4 pair. If you want 0.5 times what is listed, change the values." But this would change the LJ interaction for 1-4 pairs and all other pairs that are not excluded, correct? Consider a UA model

Re: [gmx-users] nonbond_params directive

2018-07-28 Thread Justin Lemkul
On 7/28/18 7:19 PM, Eric Smoll wrote: On Sat, Jul 28, 2018 at 2:17 PM, Justin Lemkul wrote: On 7/26/18 5:52 PM, Eric Smoll wrote: Hello GROMACS users, I have a quick question about the nonbond_params directive. If I provide gen-pairs=yes and fudgeQQ=0.5 in the defaults directive, GROMA

Re: [gmx-users] nonbond_params directive

2018-07-28 Thread Eric Smoll
On Sat, Jul 28, 2018 at 2:17 PM, Justin Lemkul wrote: > > > On 7/26/18 5:52 PM, Eric Smoll wrote: > >> Hello GROMACS users, >> >> I have a quick question about the nonbond_params directive. >> >> If I provide gen-pairs=yes and fudgeQQ=0.5 in the defaults directive, >> GROMACS will >> > > That's f

Re: [gmx-users] nonbond_params directive

2018-07-28 Thread Justin Lemkul
On 7/26/18 5:52 PM, Eric Smoll wrote: Hello GROMACS users, I have a quick question about the nonbond_params directive. If I provide gen-pairs=yes and fudgeQQ=0.5 in the defaults directive, GROMACS will That's fudgeLJ, not fudgeQQ, but yes. (1) compute VDW parameters for all atomtype-pair

[gmx-users] nonbond_params directive

2018-07-26 Thread Eric Smoll
Hello GROMACS users, I have a quick question about the nonbond_params directive. If I provide gen-pairs=yes and fudgeQQ=0.5 in the defaults directive, GROMACS will (1) compute VDW parameters for all atomtype-pairs and (2) scale all 1-4 interactions specified in the pairs directive by 0.5. Note th