How to enable Chaos

[VictorLerp]

@anonymous_user_fb040bbd

From the launcher. I have been trying for 2 days to it to work from Github with no success. Have done it(preview 2) from Github?

Chaos will only work if you download and compile the engine from GitHub. Follow the instructions on the first post of this thread

[anonymous_user_fb040bbd]

I don’t see 4.23 P2 on github. I tried P1. When I try GenerateProjectFiles.bat I get this error

I have VS 2017 installed and did the update and the Game development with C++ is installed. I have written some C++ code and used it in 4.22.3 and it worked. I tried 4.23 P2 from the launcher. I installed all needed plugins. When I do a right click Physics in P2 I don’t see Geometry Collections. Does P2 from the launcher work? I don’t see P2 on github.

[anonymous_user_06baec79]

You need to install the .NET framework 4.6.2 target and framework you can pull that from the VS 2017 Installer / launcher

[order66]

Follow these steps to enable Chaos in 4.23 Preview:

1. Download 4.23 Preview from Github (source build is required, and we recommend you grab the latest preview version)
2. Add the following in the UE4Editor.Target.cs file:

bCompileChaos = true;

Your UE4Editor.Target.cs file should look like this:

public class UE4EditorTarget : TargetRules
{
public UE4EditorTarget( TargetInfo Target ) : base(Target)
{
Type = TargetType.Editor;
BuildEnvironment = TargetBuildEnvironment.Shared;
bBuildAllModules = true;
ExtraModuleNames.Add("UE4Game");

bCompileChaos = true;

}
}

3. Make sure the following plugins are enabled:

ChaosEditor
Planar Cut
Editable Mesh
Geometry

4. Build!

**NOTE: **This will enable Chaos for all of your Blueprint and C++ projects. If you’d like to enable Chaos per project, you will have to add the lines under step 2 to your project’s Target.cs file and create a C++ project (it won’t work with a Blueprint project).

Feel free to use this thread for discussions related to Chaos. We appreciate your feedback!

Can you add some quick instructions on how to make Chaos work in-game? I am able to create some a GeometryCollection and fracture the mesh, but the actual physics simulation doesn’t want to start. E.g. if I place that mesh in the air, it is just stuck. Doesn’t seem to be affected by Gravity or anything.

[Dasca_ITA]

Follow these steps to enable Chaos in 4.23 Preview:

1. Download 4.23 Preview from Github (source build is required, and we recommend you grab the latest preview version)
2. Add the following in the UE4Editor.Target.cs file:

bCompileChaos = true;

Your UE4Editor.Target.cs file should look like this:

public class UE4EditorTarget : TargetRules
{
public UE4EditorTarget( TargetInfo Target ) : base(Target)
{
Type = TargetType.Editor;
BuildEnvironment = TargetBuildEnvironment.Shared;
bBuildAllModules = true;
ExtraModuleNames.Add("UE4Game");

bCompileChaos = true;

}
}

3. Make sure the following plugins are enabled:

ChaosEditor
Planar Cut
Editable Mesh
Geometry

4. Build!

**NOTE: **This will enable Chaos for all of your Blueprint and C++ projects. If you’d like to enable Chaos per project, you will have to add the lines under step 2 to your project’s Target.cs file and create a C++ project (it won’t work with a Blueprint project).

Feel free to use this thread for discussions related to Chaos. We appreciate your feedback!

Please, could someone explain in which file add the plugins (point 3) before build the engine?

Thx

Davide

[VictorLerp]

Can you add some quick instructions on how to make Chaos work in-game? I am able to create some a GeometryCollection and fracture the mesh, but the actual physics simulation doesn’t want to start. E.g. if I place that mesh in the air, it is just stuck. Doesn’t seem to be affected by Gravity or anything.

I’ve added two videos to the original post - they have lots of information on how to use Chaos!

[OptimisticMonkey]

Thanks - I can create the geometry collection and fracture it fine, but when I run it it just hangs in the air… Any ideas/suggestions?

Do you have a super simple sample you could post?

[anonymous_user_fb040bbd]

Finally have compiled 4.23 P2 witn no errors. Here is in the docs. “1. After compiling finishes, you can load the editor from Visual Studio by setting your startup project to UE4 and pressing F5 to debug”. I guess I start it in VS 2017. I am not a great wizard with VS. Could you give me an explicit on how to get 4.23 P2 to start. I tried the UE4Editor.exe. It starts OK gets to 45% and just sets there. I have looked at readme.md. The compile took 5 hours.

[pstarace]

, You’ll sit at 45% for awhile as the shaders are compiled. If you start task manager you’ll see Unreal and if you click the drop down arrow you’ll see the shaders being built utilizing all the cores you have available. So, be patient.

[tekktekk128]

I have upgraded Win7 to Win10 and finally chaos worked well.
There are no errors to generate Geometry Collection.

[pstarace]

Built the source as per VicrorLerp’s instructions at the top of thread, and I managed to get GeometryCollection and Fracture to work. When the scene plays the cube falls, hits the ground (make sure you have floor turned on) and breaks apart. Plugins are enabled, and a key point is to change ProjectSettings -> Physics -> ChaosSettings -> DefaultThreadingModel to anything other than “TaskGraph”. Next is to figure out Fields.

[OptimisticMonkey]

@pstarace you are awesome! That worked for me… ProjectSettings -> Physics -> ChaosSettings -> DefaultThreadingModel to anything other than “TaskGraph”

Thank you !!

maybe add that step to the first post…

[RJM]

Geometry Collection not showing up in UE 4.23 preview 2 from source.
I built a BP and a C++ project neither has the GeoCollection when i right click in browser and go to physics.
i followed post
I also changed the ChaosSettings to anything besides TaskGraph like in the previous 2 posts.
any help would be appreciated,

edit
the Fracture editor was hidden and i can generate a geocollection from there.

edit 2*

where are these initialization fields.
in the Order from Chaos - Destruction in UE4 | GDC 2019 | Unreal Engine video when he right clicks in browser i see the field system option which doesnt appear for me.

[order66]

@pstarace

Built the source as per VicrorLerp’s instructions at the top of thread, and I managed to get GeometryCollection and Fracture to work. When the scene plays the cube falls, hits the ground (make sure you have floor turned on) and breaks apart. Plugins are enabled, and a key point is to change ProjectSettings -> Physics -> ChaosSettings -> DefaultThreadingModel to anything other than “TaskGraph”. Next is to figure out Fields.

Very nice! Thanks a lot for this tip. Now it’s working

[MothDoctor]

OK, now how to implement shooting mechanics?

• collision for geo collection for tracing it
• field system to cause destruction

GDC talk nicely shows effect and general components of system, but not the implementation detail.

[anonymous_user_fb040bbd]

Geometry Collection not showing up in UE 4.23 preview 2 from source.
I built a BP and a C++ project neither has the GeoCollection when i right click in browser and go to physics.
i followed post
I also changed the ChaosSettings to anything besides TaskGraph like in the previous 2 posts.
any help would be appreciated,

edit
the Fracture editor was hidden and i can generate a geocollection from there.

edit 2*

where are these initialization fields.
in the Order from Chaos - Destruction in UE4 | GDC 2019 | Unreal Engine video when he right clicks in browser i see the field system option which doesnt appear for me.

Are you using P2 from the launcher? How did you get the “Fracture editor” to come up?

[order66]

Are you using P2 from the launcher? How did you get the “Fracture editor” to come up?

See the original post. You can NOT use the launcher version.

[RJM]

@anonymous_user_9c39f750Professor

Are you using P2 from the launcher? How did you get the “Fracture editor” to come up?

@ i built from ue_4.23 p2 source on github. the Fracture editor was hidden next to the Geometry Editing tab in the modes section.
but still nothing appears when i right click in browser and go to physics.

[xxAtrain223]

They moved it to the Fracture Editor Mode. Select your static assets in your level, go to the Fracture Editor Mode panel, and click the Generate Geometry Collection Asset button under the Select group. It will bring up a dialog window to save the new GeometryCollectionAsset, and then replace the static assets with the new GeometryCollectionAsset.

[anonymous_user_fb040bbd]

They moved it to the Fracture Editor Mode. Select your static assets in your level, go to the Fracture Editor Mode panel, and click the Generate Geometry Collection Asset button under the Select group. It will bring up a dialog window to save the new GeometryCollectionAsset, and then replace the static assets with the new GeometryCollectionAsset.

Are you using P2 from the launcher? I don’t see the Fracture Editor in the Mode panel.