[REQ] Maintain depth fix

[andycaccia]

This bug is real pain... it ruins gameplay, realism and is difficult to fix. It was also present in SH4 and in some measure even in SH3 ( I remember tweaking a VIIC/42 and bringing it down to 400m. At such depth it slowly started sinking. I would like to see the .sim files of SH3 and search for clues, since the game engine is very similar at the core.

Dont worry, if I ever will be able to find a solution for this I will tell.

One last thing: do you know what the "put_on_water" thing is? How does it affect gameplay? It should have something to do with the physic model of the ship...

Cheers

[Kromus]

Originally Posted by andycaccia

One last thing: do you know what the "put_on_water" thing is? How does it affect gameplay? It should have something to do with the physic model of the ship...

Maybe it can float and reacts on water behavior (not a static object or something) Really no other idea sorry.

[andycaccia]

Originally Posted by Kromus

Maybe it can floats and reacts on water behavior (not a static object or something) Really no other idea sorry.

My thought as well, thanks. I am messing around with everithing... sorry to bother.

Have a nice day!

[TheDarkWraith]

Originally Posted by andycaccia

One last thing: do you know what the "put_on_water" thing is? How does it affect gameplay? It should have something to do with the physic model of the ship...

maybe this will help you all figure it out (also tells you what put on water does):

HydroCtrl.cpp.The object's front-rear drag coef...FR..The object's up-down drag coef..UD..The object's left-right drag coef...LR..The object's drag (water resistance) coefs [F=C*v^2]....The object's draught [m]. If 0, then the geometric bounding box height is taken.....draught.....The object's displacement [Tons]. If 0 then it is automaticaly computed.....displacement....The object's submerged parameters...Submerged.......The object's draught [m]. If 0, then it is taken from the object's global position......The object's displacement [Tons]. If 0 then the object's mass is taken..The object's surfaced parameters....Surfaced....Put the hydro object on the water at the surfaced draught...bool....put_on_water........Gravity center horizontal position [>0]. 1=FRONT, 0.5=MIDDLE, 0=REAR....fr_ratio........Gravity center height from the object's bottom [m]. If 0, then the half of geometric bounding box is taken..gc_height...The object's mass [Tons]. If 0, then the object's surfaced displacement is taken....mass....Display the object's submerged draught..SD..Display the object's gravity center.....GC..Display the object's parameters.....params..Debug display settings..Debug...Hydro controller: controlls an object that can float....obj_Hydro...hull

[Nicolas]

Hello, you can copy the drag etc values from VIIC to VIIA/B to correct sinking, i don't know deeper than 200 what happens.

[andycaccia]

Originally Posted by Nicolas

Hello, you can copy the drag etc values from VIIC to VIIA/B to correct sinking, i don't know deeper than 200 what happens.

I fear it's not that easy. I've done this but it doesn't work for me. Cloning a VIIC sim file still leaves the sinking effect. Does it work for you?

[Nicolas]

Yes it worked, i opened the .gr2 file and merged it with the .sim then i copied all the values that i thought was relative to depth keeping including mass displacement surfaced and submerged, drag.

[andycaccia]

Originally Posted by Nicolas

Yes it worked, i opened the .gr2 file and merged it with the .sim then i copied all the values that i thought was relative to depth keeping including mass displacement surfaced and submerged, drag.

I see, I have done the same. This solved the porblem relative to the VIIB which
was unable to keep the ordered depth (it goes 4 meters lower than ordered at 40m depth and slightly less ar shallower depths) but still leaves the slow sinking effect. For example, can you keep your boat stable at 180m at very low speed with your method? I remember the VIIcs sinking down anyway...

[andycaccia]

Originally Posted by TheDarkWraith

maybe this will help you all figure it out (also tells you what put on water does):

HydroCtrl.cpp.The object's front-rear drag coef...FR..The object's up-down drag coef..UD..The object's left-right drag coef...LR..The object's drag (water resistance) coefs [F=C*v^2]....The object's draught [m]. If 0, then the geometric bounding box height is taken.....draught.....The object's displacement [Tons]. If 0 then it is automaticaly computed.....displacement....The object's submerged parameters...Submerged.......The object's draught [m]. If 0, then it is taken from the object's global position......The object's displacement [Tons]. If 0 then the object's mass is taken..The object's surfaced parameters....Surfaced....Put the hydro object on the water at the surfaced draught...bool....put_on_water........Gravity center horizontal position [>0]. 1=FRONT, 0.5=MIDDLE, 0=REAR....fr_ratio........Gravity center height from the object's bottom [m]. If 0, then the half of geometric bounding box is taken..gc_height...The object's mass [Tons]. If 0, then the object's surfaced displacement is taken....mass....Display the object's submerged draught..SD..Display the object's gravity center.....GC..Display the object's parameters.....params..Debug display settings..Debug...Hydro controller: controlls an object that can float....obj_Hydro...hull

Thank you, but those descriptions are the same displayed by goblineditor, so I guess everybody already knows them. My question was about the actual effects it could have in game. but don't worry: I found the answer on my own: basically nothing changes if you turn this off.

[THE_MASK]

Originally Posted by TheDarkWraith

maybe this will help you all figure it out (also tells you what put on water does):

HydroCtrl.cpp.The object's front-rear drag coef...FR..The object's up-down drag coef..UD..The object's left-right drag coef...LR..The object's drag (water resistance) coefs [F=C*v^2]....The object's draught [m]. If 0, then the geometric bounding box height is taken.....draught.....The object's displacement [Tons]. If 0 then it is automaticaly computed.....displacement....The object's submerged parameters...Submerged.......The object's draught [m]. If 0, then it is taken from the object's global position......The object's displacement [Tons]. If 0 then the object's mass is taken..The object's surfaced parameters....Surfaced....Put the hydro object on the water at the surfaced draught...bool....put_on_water........Gravity center horizontal position [>0]. 1=FRONT, 0.5=MIDDLE, 0=REAR....fr_ratio........Gravity center height from the object's bottom [m]. If 0, then the half of geometric bounding box is taken..gc_height...The object's mass [Tons]. If 0, then the object's surfaced displacement is taken....mass....Display the object's submerged draught..SD..Display the object's gravity center.....GC..Display the object's parameters.....params..Debug display settings..Debug...Hydro controller: controlls an object that can float....obj_Hydro...hull

Could we have 2 sets of parameters . 1 for if is surfaced and 1 for if is submerged .