0000367: RHS_M2A3_BUSKIII launches into space on a right turn

(0000902)
Tachi (reporter)
2015-03-03 14:31

Happened with abrams also in version 035

(0000904)
MistyRonin (administrator)
2015-03-03 15:04
edited on: 2015-03-03 15:34

It's because PhysX can't handle well certain exceptional cases, like when tracks get stuck.

We'll check once the vanilla 1.40 ( and its new PhysX changes ) is released.

(0000961)
MistyRonin (administrator)
2015-03-08 21:55

Does it still happens?

(0000971)
brewer0300 (reporter)
2015-03-09 18:44
edited on: 2015-03-09 18:45

Yes.

Most often this happens when moving full right or left from a stop. When you press the D or A key, the vehicle will spin around 360 degrees or more within a second and you can't stop the spin by trying to move in the opposite direction. This happens when in first person and in 3rd person view.

I have a few videos of this happening I will try to post later today.

(0001010)
jjameson3 (reporter)
2015-03-19 19:03

I tweaked the values, most of the floatiness is gone, though if you mash E and D after about 10 rotations it still acts like it's on ice.

File added physX.hpp

(0001011)
Soul_Assassin (administrator)
2015-03-20 08:33

Cant just do things like this:
```
enginePower = 800; //Original 447 - Needed to bump up over real values to make it drivable up hills at a reasonable rate
```

whats the design justification? Whats reasonable? Why the real value has to be negated? Maybe it drives shit uphil in real life?

(0001013)
jjameson3 (reporter)
2015-03-20 15:50

Soul,

According to the former Bradley crewman (3 of them) in our unit, this version was significantly under-performing going uphill as compared to the real one. That minor tweak split the difference without radically changing the performance of the rest of the vehicle.

I also changed the gearbox to be closer to the actual top speed of 56kph on roads compared to what was configured.

I modified Q speed to more of a crawl, and W speed to match closer to real off-road specifications (45-46kph).

(0001015)
RedPhoenix (developer)
2015-03-20 16:08

maxSpeed = 56; - irrelevant for tankX class.
enginePower = 800; - why that? If you want to complain about poor tank performance open a ticket here: http://feedback.arma3.com/main_page.php [^]
Changing enginePower without editing the torqueCurve an coexisting values will result in fubar.

And the biggest laughter you created:
Tire parameters - "Original not commented out, we don't have tires"
Sorry..... Nope. Tanks DO have tires. At least, in Arma, because the tracks are not simulated as tracks, they are just a plain texture spinnign around the wheels.
Arma simulates all wheels as they were actual wheels, hence the bad driving performance. Comenting out a crucial part in class Wheels (wheels... d'uuuh...) won't help improving the driving behaviour.

(0001016)
jjameson3 (reporter)
2015-03-20 16:12

Red,

For a car with tires, yes those are required. The solid rubber and steel tires on a Bradley are on a track, and thus have no slippage characteristics that were trying to be modeled with those parameters.

While your laughing, why don't you actually try driving it once with the updates.

(0001018)
RedPhoenix (developer)
2015-03-20 22:41

I did test it - and nothing really improved.

The point that you believe that RV-Engine simulates tracks just makes it clear to me that you do not know how it actually works.

(0001428)
Soul_Assassin (administrator)
2015-05-15 12:03

waiting on adequate fixes to PhysX from BIS. Or explanation from them what is causing this.

Issue History
Date Modified	Username	Field	Change
2015-03-02 22:13	jjameson3	New Issue
2015-03-03 14:31	Tachi	Note Added: 0000902
2015-03-03 15:04	MistyRonin	Note Added: 0000904
2015-03-03 15:05	MistyRonin	Status	new => closed
2015-03-03 15:05	MistyRonin	Assigned To	=> MistyRonin
2015-03-03 15:05	MistyRonin	Resolution	open => won't fix
2015-03-03 15:14	MistyRonin	Note Edited: 0000904	View Revisions
2015-03-03 15:14	MistyRonin	Status	closed => new
2015-03-03 15:15	MistyRonin	Note Edited: 0000904	View Revisions
2015-03-03 15:34	MistyRonin	Note Edited: 0000904	View Revisions
2015-03-08 21:55	MistyRonin	Note Added: 0000961
2015-03-08 21:55	MistyRonin	Status	new => feedback
2015-03-09 18:44	brewer0300	Note Added: 0000971
2015-03-09 18:45	brewer0300	Note Edited: 0000971	View Revisions
2015-03-19 19:03	jjameson3	Note Added: 0001010
2015-03-19 19:03	jjameson3	Status	feedback => assigned
2015-03-19 19:03	jjameson3	File Added: physX.hpp
2015-03-20 08:33	Soul_Assassin	Note Added: 0001011
2015-03-20 15:50	jjameson3	Note Added: 0001013
2015-03-20 16:02	Soul_Assassin	Status	assigned => new
2015-03-20 16:08	RedPhoenix	Note Added: 0001015
2015-03-20 16:12	jjameson3	Note Added: 0001016
2015-03-20 16:37	brewer0300	Note Added: 0001017
2015-03-20 22:41	RedPhoenix	Note Added: 0001018
2015-03-20 23:29	brewer0300	Note Deleted: 0001017
2015-05-15 12:03	Soul_Assassin	Note Added: 0001428
2015-05-15 12:03	Soul_Assassin	Status	new => closed

Notes
(0000902) Tachi (reporter) 2015-03-03 14:31	Happened with abrams also in version 035

(0000904) MistyRonin (administrator) 2015-03-03 15:04 edited on: 2015-03-03 15:34	It's because PhysX can't handle well certain exceptional cases, like when tracks get stuck. We'll check once the vanilla 1.40 ( and its new PhysX changes ) is released.

(0000961) MistyRonin (administrator) 2015-03-08 21:55	Does it still happens?

(0000971) brewer0300 (reporter) 2015-03-09 18:44 edited on: 2015-03-09 18:45	Yes. Most often this happens when moving full right or left from a stop. When you press the D or A key, the vehicle will spin around 360 degrees or more within a second and you can't stop the spin by trying to move in the opposite direction. This happens when in first person and in 3rd person view. I have a few videos of this happening I will try to post later today.

(0001010) jjameson3 (reporter) 2015-03-19 19:03	I tweaked the values, most of the floatiness is gone, though if you mash E and D after about 10 rotations it still acts like it's on ice. File added physX.hpp

(0001011) Soul_Assassin (administrator) 2015-03-20 08:33	Cant just do things like this: ``` enginePower = 800; //Original 447 - Needed to bump up over real values to make it drivable up hills at a reasonable rate ``` whats the design justification? Whats reasonable? Why the real value has to be negated? Maybe it drives shit uphil in real life?

(0001013) jjameson3 (reporter) 2015-03-20 15:50	Soul, According to the former Bradley crewman (3 of them) in our unit, this version was significantly under-performing going uphill as compared to the real one. That minor tweak split the difference without radically changing the performance of the rest of the vehicle. I also changed the gearbox to be closer to the actual top speed of 56kph on roads compared to what was configured. I modified Q speed to more of a crawl, and W speed to match closer to real off-road specifications (45-46kph).

(0001015) RedPhoenix (developer) 2015-03-20 16:08	maxSpeed = 56; - irrelevant for tankX class. enginePower = 800; - why that? If you want to complain about poor tank performance open a ticket here: http://feedback.arma3.com/main_page.php [^] Changing enginePower without editing the torqueCurve an coexisting values will result in fubar. And the biggest laughter you created: Tire parameters - "Original not commented out, we don't have tires" Sorry..... Nope. Tanks DO have tires. At least, in Arma, because the tracks are not simulated as tracks, they are just a plain texture spinnign around the wheels. Arma simulates all wheels as they were actual wheels, hence the bad driving performance. Comenting out a crucial part in class Wheels (wheels... d'uuuh...) won't help improving the driving behaviour.

(0001016) jjameson3 (reporter) 2015-03-20 16:12	Red, For a car with tires, yes those are required. The solid rubber and steel tires on a Bradley are on a track, and thus have no slippage characteristics that were trying to be modeled with those parameters. While your laughing, why don't you actually try driving it once with the updates.

(0001018) RedPhoenix (developer) 2015-03-20 22:41	I did test it - and nothing really improved. The point that you believe that RV-Engine simulates tracks just makes it clear to me that you do not know how it actually works.

(0001428) Soul_Assassin (administrator) 2015-05-15 12:03	waiting on adequate fixes to PhysX from BIS. Or explanation from them what is causing this.

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