uFlex - NVidia FLEX for Unity3D - Unified Visual FX [RELEASED]

Hi @korzen303.
Can you please tell me how to use different meshes in uFlex other than the default one.
With Regards,
Chanddu.

 

hi there,
i would like to use uflex with the current usecase:
a pool of rigidbodies with many rigidbodies.
rigidbodies should be textured specifically, not colored with a general color. is there a way to do this ?

also , can i speed up the framerate of the simulation . the bodies and gravity works abit slow..

 

Hi, @korzen303
When do you plan to release a new version? (approx.) Thank you.

 

Anyone has standard unity shader with improvments from minute 29?

I wrote something like this, from video, maybe sombody can make it work:

Code (CSharp):

1. Shader "Custom/shaderflexmoj" {
2. Properties {
3.         _Color ("Color", Color) = (1,1,1,1)
4.         _MainTex ("Albedo (RGB)", 2D) = "white" {}
5.         _Glossiness ("Smoothness", Range(0,1)) = 0.5
6.         _Metallic ("Metallic", Range(0,1)) = 0.0
7.     }
8.     SubShader {
9.         Tags { "RenderType"="Opaque" }
10.         LOD 200
11.    
12.         CGPROGRAM
13.         #pragma multi_compile _ _DYNAMIC_VERTICES
14.         #pragma vertex vertForwardBaseDynamic
15.  
16.         // Physically based Standard lighting model, and enable shadows on all light types
17.         #pragma surface surf Standard fullforwardshadows
18.         #pragma target 3.0
19.  
20.         #ifdef _DYNAMIC_VERTICES
21.           #include "../dodatki/DynamicVertices.cginc"
22.             VertexOutputForwardBase vertForwardBaseDynamic(VertexInput v, uint vertexId :SV_VertexID){
23.             TransferStandardDynamicData(v, vertexId);
24.             return vertForwardBase(v);
25.             }
26.             #else
27.             VertexOutputForwardBase vertForwardBaseDynamic(VertexInput v){
28.             return vertForwardBase(v);
29.             }
30.             #endif
31.         // Use shader model 3.0 target, to get nicer looking lighting
32.  
33.  
34.         sampler2D _MainTex;
35.  
36.         struct Input {
37.             float2 uv_MainTex;
38.         };
39.  
40.  
41.         half _Glossiness;
42.         half _Metallic;
43.         fixed4 _Color;
44.  
45.         void surf (Input IN, inout SurfaceOutputStandard o) {
46.             // Albedo comes from a texture tinted by color
47.             fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
48.             o.Albedo = c.rgb;
49.             // Metallic and smoothness come from slider variables
50.             o.Metallic = _Metallic;
51.             o.Smoothness = _Glossiness;
52.             o.Alpha = c.a;
53.         }
54.         ENDCG
55.  
56.     }
57.     FallBack "Diffuse"
58. }

also made made txt file changed to cginc

Code (CSharp):

1.      int _firstVertex;
2.          StructuredBuffer<float3>POSITIONS;
3.          StructuredBuffer<float3>NORMALS;
4.          StructuredBuffer<float4>TANGENTS;
5.  
6.          void TransferStandardDynamicData(inout VertexInput v, int vertexId)
7.          {
8. vertexId += _firstVertex;
9.          v.vertex.xyz=POSITIONS[vertexId];
10.          v.normal=NORMALS[vertexId];
11.              #ifdef _TANGENT_TO_WORLD
12.              v.tangent.xyz=TANGENTS[vertexId];
13.              #endif}

As you might guess it does not compile.

Also on the video at 31min Flex particles are asigned to the nearest skinned mesh vertexes, therfore He can animate main model with cloths(maybe he has made only an empty shel made from flex particles), then these Flex particles might have zero invere mass which is important for uflex Cloth settings...
It would be pretty nice if uflex got a function like that,of creating uflex particle for skinned mesh characters where uflex particles are asigned to movig mesh vertexes with 0 mass.[/QUOTE]

@pan-master Hi, have you managed to get this to work eventually? Thanks

 

Hi @korzen303.
Im Japanese.
Thank you for beautiful asset.

I have a question.
Can I create more than one particle?

Thank you.

 

Any updates on the AMD situation? Also, how about XBox One, PS4, and Switch?

 

Hey @korzen303, I started a private conversation with you where I provided my e-mail address. If you'd like to correspond about the issue I've found, I'd love to hear from you!

 

I stumbled into a solution for this and another problem with additional UV sets. To fix the normal mapping issue I added this in FlexWindow.cs at line 817 where uFlex creates the mesh. It makes uFlex import the model's tangents.

mesh.tangents = this.inputMesh.tangents;

Plus, if you are using a mesh with multiple UV sets then put in this line.

mesh.uv2 = this.inputMesh.uv2;

Do this for mesh.uv3 and 4 if needed.

 

Please, I have this problem. I needed to reduce the particle to real sizes to put the liquid inside a glass of water, that is, a reduction of approximately 100 times. The liquid leaks through the mesh. How to solve this?

 

glass create as Rigbody used uflex tool

 

Any roadmap for android?

 

Hi,
@ccc7861 - I am trying to cut a uflex softbody using your code in #138 , I see that you are using CutTool in it with a default plane.

So,should I create a class cut tool with a game object that has a property Deafault Plane or is there another way.

Anyone else who used the code ??

Thanks for the Help!.

 

Hi, I'm receive 12 or so warnings about "MaxParticles" and was wondering if there was any code I need to fix or update to resolve these issues. Please see the attached screenshot for more info.

 

@ccc7861 Thank for sharing this code! Do you have anything like it for writing a function to cut flex tearing cloths via script?

 

Hi @korzen303,

Great plugin!

I'm having an issue with softbodies and I'm wondering if you can help. When I create a softbody from my model, there are jagged artifacts along the UV seams of the model as you can see here:



I exported my model again but this time with no UV map, and the artifacts go away in the created softbody:



Do you have any idea why this is happening? The non-softbody version of the model that has the UV map looks smooth as well.

 

Hi Everyone,

I wrote a script that lets you bind softbodies to rigidbodies. This is equivalent to the "attach to rigids" feature in the Flex build of UE4, if you're familiar with that. To use the script, attach it to your uFlex softbody and assign the colliders that you wish to bind the softbody to using the "colliders to bind to" field.

Hope this helps someone!

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.Collections.Generic;
4.  
5. namespace uFlex
6.  
7. {
8.     public class LockedParticle
9.     {
10.         public int particleIndex;
11.         public Vector3 localPos;
12.         public Transform rigidBoundTo;
13.  
14.         public LockedParticle(int idx, Vector3 pos, Transform rigid) {
15.             particleIndex = idx;
16.             localPos = pos;
17.             rigidBoundTo = rigid;
18.         }
19.     }
20.  
21.     public class BindToRigids : FlexProcessor
22.     {
23.         List<LockedParticle> lockedParticles = new List<LockedParticle> ();
24.  
25.         public Collider[] collidersToBindTo;
26.  
27.         private FlexParticles m_flexParticles;
28.  
29.         float particleRadius;
30.  
31.         Vector3 localToGlobal(Vector3 point) {
32.             return transform.localToWorldMatrix.MultiplyPoint (point);
33.         }
34.  
35.         public override void FlexStart(FlexSolver solver, FlexContainer cntr, FlexParameters parameters)
36.         {
37.             particleRadius = parameters.m_radius;
38.             m_flexParticles = GetComponent<FlexParticles>();
39.  
40.             int indexOffset = m_flexParticles.m_particlesIndex;
41.  
42.             for (int i = 0; i < m_flexParticles.m_particlesCount; i++) {
43.                 Vector3 particlePos = localToGlobal(m_flexParticles.m_particles [i].pos);
44.  
45.                 for (int j = 0; j < collidersToBindTo.Length; j++) {
46.  
47.                     if (collidersToBindTo [j].bounds.Contains (particlePos)) {
48.  
49.                         Transform colliderTransform = collidersToBindTo [j].gameObject.transform;
50.  
51.                         // get particle pos relative to object transform
52.                         Vector3 localPos = colliderTransform.worldToLocalMatrix.MultiplyPoint(particlePos);
53.  
54.                         LockedParticle particleToLock = new LockedParticle (i + indexOffset, localPos, colliderTransform);
55.  
56.                         // add to list of particles to constrain
57.                         lockedParticles.Add (particleToLock);
58.                     }
59.                 }
60.             }
61.         }
62.  
63.         public override void PostContainerUpdate(FlexSolver solver, FlexContainer cntr, FlexParameters parameters)
64.         {
65.             // update locked particles
66.             print(lockedParticles.Count);
67.             for (int i = 0; i < lockedParticles.Count; i++) {
68.                 LockedParticle p = lockedParticles [i];
69.  
70.                 int idx = p.particleIndex;
71.  
72.                 Vector3 newPos = p.rigidBoundTo.transform.localToWorldMatrix.MultiplyPoint (p.localPos);
73.  
74.                 cntr.m_particles [idx].pos = newPos;
75.                 cntr.m_particles [idx].invMass = 0.0f;
76.             }
77.         }
78.     }
79. }

 

hey thanks! i tried but get this error
UnityException: get_value is not allowed to be called from a ScriptableObject constructor (or instance field initializer), call it in OnEnable instead. Called from ScriptableObject 'FlexWindow'.
See "Script Serialization" page in the Unity Manual for further details.
uFlex.FlexWindow..ctor () (at Assets/uFlex/Editor/FlexWindow.cs:74)

I don't write code so I'm not sure how to fix.

@korzen303 I'd like to use the rope system to make a suspension bridge. I've tested your ropes and no matter how I stretch them out it doesn't go crazy and fail.

The only thing I'm missing is how to connect my rigid body meshes to your rope? This is the bridge I made in the past but like I said I need it to be more stable and faster on the GPU.

Also you should be asking Partel Lang - developer of Final IK about your shader problem, he apparently wrote that GPU cloth in the video.

 

Hi Tejaswini!! did you got an answer for your question?

 

Can you please add a tutorial for this code?

 

I've Got this error:
An object reference is required for the non-static field, method, or property 'CutTool.DefaultPlane'
Can someone help me with this script?

 

1. At default particles are distributed with value of influacne that equls=1,
Could it be possibe to asign different infualce values to particles depending on the distantce of particles to the closest vertex?
I mean, the closer particle is is to mesh vertex the more Invluecne that particle it should have, It would create bone like particle structure, with hard interior influacnes and jigle inluacne at outer possitions.
2.Could it be possible to override part of meshRenderer of soft body with custom vertex positions?

 

Sounds like nvidia have something up their sleeves:

https://developer.nvidia.com/gdc18-show-guide-nvidia

 

Sounds great.

 

hi @mlsptn

i had same issue with jagged
i think this issue occur becasue the UV Border

it can fix by add one line to theFlexWindows.cs

in the function of
private void GenerateFromMesh(GameObject go)

add this
"mesh.normals = this.inputMesh.normals;"

below this line
mesh.RecalculateNormals();

like below

private void GenerateFromMesh(GameObject go)
{
.
.

mesh.RecalculateNormals();
mesh.normals = this.inputMesh.normals;//add this then it will use inputMesh normal to create normal
.
.
}

and remake softbody again i will no jagged
but in game the softbody collide and change shape
the jagged will appear
i do not know how to fix it


sorry with my poor english

 

As expected from the wording in the nvidia GDC show guide, an official Unity FleX plugin got announced, even before the talk/demo on the subject which takes place tomorrow. And 'Unity (Coming Soon)' got added to the GameWorks FleX page engine section. I am not at GDC myself so am reliant on others for news on this, and my own fevered refreshing of key pages on the net

https://developer.nvidia.com/flex

 

NVidia showed this GameWorks/Flex plugin already at Unite Europe in June last year. Hence, the lack of updates to uFlex since then. Upgrading uFlex to Flex 1.1 or 1.2 would require a major rewrite.

I am really happy that I provided the Unity Community with such a great technology as NVidia Flex more than two years ago!

 

Hello @korzen303 , it seems the SmallScale sample scene does only work for the fluid, but not for creating e.g. a sphere and having the particles interact with it (with a MeshCollider). They just ignore it. Also, the fluid particles mostly ignore the armadillos in your sample scene; there seems to be a tiny bit of interaction going on, but really not much.

Could you please check that you sample scene is working as intended?

Steps to reproduce:
- create a small sphere (e.g. radius 0.5)
- add MeshCollider instead of SphereCollider
- change MeshCollider cooking to "Inflate"
- Play.
- move sphere through fluid

Expected: sphere affects fluid particles.
Actual: nothing happens.

 

I found the GDC Nvidia session video on GDCvault, I dont seem to be able to link directly to that sessions video though, so you have to find it on the following page:

https://www.gdcvault.com/browse/gdc-18#page-9

(its called NVIDIA GameWorks: New Features)

Anyway the Unity FleX bit starts a bit after the 28 minute mark, and is basically a brief demo of the plugin in use. The only thing said about timescale is that a slide says 'coming shortly after GDC'.

 

guys i have question for uflex liquid section.
i was trying to use particle system to emit liquid into a mesh container with mesh colider. the issue is when liquid hit the edge of the vertical plane and flat plane , the liquid wont bounce back and start to accumulate water inside of the container with mesh colider. it just leak out of the box.
did i create the colider box in a wrong way ?

James

 

@pan-master try reinstalling the GeForce drivers with clean option marked. Sometimes WindowsUpdates brake things

 

Iam trying to use uFlex fluid with DynamicMesh Colliders,
It looks like FlexCollider.cs script Reads MeshFilter.mesh and MeshCollider of Collision Object,to Pass CollisionMeshData into Solver

To read Updated MeshCollider I change FlexColliders.cs at 51 line
from GetComponent<MeshFilter>().mesh;
to
GetComponent<MeshFilter>().sharedMesh;

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class DynamicCOllider : MonoBehaviour {
6.     [Range(0.005f,1)]
7.     public float RateOfUpdate = 0;
8.     MeshCollider meshColider;
9.     SkinnedMeshRenderer skinnedMeshRenderer;
10.     Mesh bakedMesh;
11.     MeshFilter meshFilter;
12.     // Use this for initialization
13.     void Start () {
14.         skinnedMeshRenderer = GetComponent<SkinnedMeshRenderer>();
15.         meshFilter = GetComponent<MeshFilter>();
16.         meshColider = GetComponent<MeshCollider>();
17.        
18.         ///Initialisation of Dynamic Collider///
19.         bakedMesh = new Mesh();
20.         skinnedMeshRenderer.BakeMesh(bakedMesh);
21.         meshFilter.sharedMesh = bakedMesh;
22.         meshColider.sharedMesh = bakedMesh;
23.  
24.         //Updateing Collider
25.         InvokeRepeating("UpdateShapeOfMeshCollider", 0.1f, RateOfUpdate);
26.     }
27.  
28.     void UpdateShapeOfMeshCollider() {
29.         skinnedMeshRenderer.BakeMesh(bakedMesh);
30.      
31.         meshFilter.sharedMesh = bakedMesh;
32.         meshFilter.sharedMesh.RecalculateBounds();
33.  
34.          meshColider.sharedMesh = bakedMesh;
35.          meshColider.sharedMesh.RecalculateBounds();
36.  
37.     }
38.  
39. }
40.  

However it looks like flexCollider.cs Script isnt Updating the shape of the collider
Maybe it is becuase "ProcessColliders" of FlexCollider.cs updates only on Collider Translation?

 

did you get answer for this?

 

About CutTool.DeafaultPlane Please, thank you
I need an answer

https://imgur.com/rs4peoz

 

Hi, I have a problem with my uFlex. i just want this granular touch each other in theor surface, not their core. anyone can help me? please

 

Wowowowow! Almost can not believe that! Is there anyway can we get the source code for unity?

 

Does it work on AMD? Does scaling work fine?

 

Go to package manager search for nvidia , import the package and try again . It worked for me

 

Hi @korzen303
Can this asset be used to achieve glue gun like effect?
I mean solidification and minor colour change of the fluid overtime.

Also, would it be possible to achieve the welding gun effect through this?
Would require a highly viscous liquid property with an option to add incandescence.

I hope I am making my question clear

 

Hi @hinalk I am afraid that it would be difficult to achieve very viscous liquid with Flex. It is due to Jacobi solver used for PBD implementation on the GPU. It simply does not converge that great compared to Gauss-Seidel or direct methods. But try maybe first with the free NVidia Flex integration and let us know

 

@korzen303 thank you for the response.
will try and post the progress on forum

 

Hello! I have the same problem with you, I'd like to know if you'solved it, if you do, how?

 

Hey, does this support plastic deformation that flex provides?

 

@korzen303
Hi Korzen！
uFlex is a great plugin, but I have a question about how to make a particle in the soft body not physically simulated, I want some particles to be completely detached from the original object, in other words, I want to be able to delete it. I have tried changing the m_Phase in the FlexContainer to 0, but it doesn't work. Another question is whether there is a way to render separate particles as different colors independently.
I hope you can still answer my questions, thank you!

 

I have implemented this function.THX.

 

where can i get this asset package? not found on store.

 

https://assetstore.unity.com/packages/tools/utilities/uflex-59843

 

Hi,
I just downloaded the uFlex V0.55 and I could get the
softdragon prefab to work. However I was wondering how to make custom soft bodies. The quickstart guide says Tools-> uflex and choose rigid or soft bodies (in the uflex.Flexwind window), but in my case the uflex.Flexwind window does not pop up.

When I select tools -> uflex, the Flex comes under the SampleScene and that's it. I probably might me missing something, please do guide me on what to do.

 

@NidhiParayil97 https://forum.unity.com/threads/ufl...visual-fx-released.397836/page-5#post-3063004

 

That made it work. thank you so much!

 

Hey, I saw all pages to check if softbodies could be cut. There was a cutting code somewhere around page 2 but it basically cuts it in half. Is it possible to tear the softbody in chunks without planes or "dissolve" part of the softbodies?

Thanks in advance <3