TUTORIAL Soft collision tyre walls with extended track physics

[Gunnar333]

The latest CSP release can do this:

But there's still no documentation about it. So I wrote Ilja and he told me how to do it. So here it is:


first you’d need to enable extended track physics
for that, change this parameter:

[SURFACE_0] WAV_PITCH=extended-0

and then you can alter collide parameters like so:

[COLLISION_PARAMS_...]
MESHES=?WALL?  ; of course, it would be better to list only soft walls here
SOFT_ERP=0.6
SOFT_CFM=0.001
MAX_DEPTH=0.5
BOUNCE=0.5
FRICTION=0.1
INTENSITY=0.1

for more information on CFM and ERP, use:
http://ode.org/ode-latest-userguide.html#sec_3_8_0

Open Dynamics Engine
http://ode.org

and here is the actual soft walls bit:

[DEFORMING_WALLS_...]
MESHES = material:barriers
TESSELLATION = 1
TESSELLATION_DISTANCE = 40, 100
TESSELLATION_FACTOR = 15, 3

with these settings it would switch to MultiMap shader with tessellation, considering how usually those walls aren’t meant to bend and don’t have enough triangles

please note that I set that tessellation factor for spa which has very few triangles for that wall, you might need to reduce it for your track. or maybe not
you can always use:

[SHADER_REPLACEMENT_...]
CULL_MODE = WIREFRAME

to see tessellation in action

here is how it looks in action:
https://files.acstuff.ru/shared/gtun/20210911-171509.mp4

also, just to clarify, DEFORMING_WALLS_… reacts to actual collision depth, so it wouldn’t really work without soft wall colliders



I did the simple test track that you can see at the first video and what can I say: It works!
The track is attached to this post. So you can test it by yourself.

It would be good to experiment more with the values. I still don't get what exactly should be changed to get a more rigit or solf wall behaviour. Also should not rendered collision walls also be treated like this?

Please comment!

 

[luchian]

this is very impressive! I can't remember how many times I thought "not really much else can be done", only to be proven wrong with each iteration.

Coming back to your interogation.

I still don't get what exactly should be changed to get a more rigit or solf wall behaviour.

It seems this has to be modified, no?

[COLLISION_PARAMS_...]
MESHES=?WALL?  ; of course, it would be better to list only soft walls here
SOFT_ERP=0.6
SOFT_CFM=0.001 -- from the documentation it seems that the higher this is, the more deformation (?)
MAX_DEPTH=0.5 -- Could this be the distance in m, from the un-deformed state (?)
BOUNCE=0.5
FRICTION=0.1
INTENSITY=0.1

Didn't do any test tho, just guessing around

 

[Gunnar333]

Yes. I changed some values but I couldn‘t make out any difference. Maybe I was testing with a replay.

 

[fughettaboutit]

i can add some more possible params:

[DEFORMING_WALLS]
MESHES = meshFilter
; defaults shown here
MAX_DEPTH = 1.0
RESTORATION_LAG = 0.8
DEPTH_MULT = 1.0  ; x,y,z possible, single value = same for all
RADIUS_MULT = 1.0  ; x,y,z possible
TESSELLATION = 1
TESSELLATION_DISTANCE = 20.0, 100.0
TESSELLATION_FACTOR = 10.0, 3.0

ALPHA_MODE = somestring ; didnt find what to put in here

edit: possible alpha_modes
NONE or DIFFUSE or NORMALS or REFLECTION

edit2: you might not use that alphamode, i guess i read that wrong and its for looks idk

 

[fughettaboutit]

first you’d need to enable extended track physics
for that, change this parameter:

[SURFACE_0] WAV_PITCH=extended-0

Thats in surfaces.ini?

edit: oh i see in "ext_config.ini" too

 

[quetillo]

I do not understand this system much, I do the circuits from the RTB program, then I pass it to KSEDITOR, should I put something in the KSEDITOR?
or just by setting the parameters and assigning the mesh and material to it. Thank you

 

[fughettaboutit]

I do not understand this system much, I do the circuits from the RTB program, then I pass it to KSEDITOR, should I put something in the KSEDITOR?
or just by setting the parameters and assigning the mesh and material to it. Thank you

look at the example track from gunnar!

 

[quetillo]

if I put those parameters and give the mesh and the material the name, the object disappears.
but ami the nePerPixelMultiMap_blending shader does not come out. The one that I put on its track

 

[quetillo]

Because this happens, it comes out like this, I go to extension I delete the name of the material and I put it again and it looks good.

 

[quetillo]

look at the example track from gunnar!

This is how I look and when it collides the wall comes out but like this

 

[Johnr777]

This is how I look and when it collides the wall comes out but like this

You need the patreon preview build for this to work.

 

[Mitch9]

also, just to clarify, DEFORMING_WALLS_… reacts to actual collision depth, so it wouldn’t really work without soft wall colliders

sorry, does this mean you need to bind this to the physical or the visual wall? if it´s for the visual, what happens to the physical then? I´ll try this later

 

[Johnr777]

sorry, does this mean you need to bind this to the physical or the visual wall? if it´s for the visual, what happens to the physical then? I´ll try this later

Good question... I for one, use a simple invisible 1WALL mesh and a visually detailed barrier named something else

 

[quetillo]

You need the patreon preview build for this to work.

I have the last csp of payment, because I am every month

 

[quetillo]

The problem is the following, a wall that when putting those parameters you see the skeleton, it would still be better to create a NM and give the name of the material to the NM. I don't know I have no idea, I took the test and it looks the same to me. the latest CSP v0.1.76-preview92-ful

 

[Johnr777]

The problem is the following, a wall that when putting those parameters you see the skeleton, it would still be better to create a NM and give the name of the material to the NM. I don't know I have no idea, I took the test and it looks the same to me. the latest CSP v0.1.76-preview92-ful

This might be a bit too advanced for you at this moment.

 

[quetillo]

fixed and solved, I code wrong, some in capital letters, that's why I got the error, I copied and entered my ex_confi and I tried, until I found the error. Advanced there is nothing as long as the codes are written correctly.

 

[quetillo]

thanks Gunnar333 for your explanations

 

[fughettaboutit]

so to summarize: you need to put smth into "surfaces.ini" to make it crash with vanilla AC, so basically that means you have to make 2 layouts, one with, one witout this, damn
https://github.com/ac-custom-shaders-patch/acc-extension-config/wiki/Tracks-–-Deforming-walls

 

[Gunnar333]

so to summarize: you need to put smth into "surfaces.ini" to make it crash with vanilla AC, so basically that means you have to make 2 layouts, one with, one witout this, damn
https://github.com/ac-custom-shaders-patch/acc-extension-config/wiki/Tracks-–-Deforming-walls

Did you test it with vanilla AC and it crashes?
I thought it would just ignore the [DEFORMING_WALLS_...] entry.