Physics Water 2D Tool - GPU based ripple water, realistic buoyancy, water flow & animation

By the way, for my LWRP update I plan to support Unity 2019.1.0 and above, is that ok with you?

 

Yes its its ok thanks

 

Yes just go straight to URP

 

The URP will be available starting with Unity 2019.3 which is currently in beta. The current version of my LWRP update works with Unity 2019.1 and 2019.2, but not with 2019.3. The change from LWRP to URP is not just in name, there are internal changes that break the compatibility with custom shaders that work on older versions of Unity. Also if I set the minimum version to 2019.3, the users that want to stay on Unity 2019.1 or 2019.2 LWRP will not be able to use this update.

 

I understand. and its good to keep compatibility with a wide range of
versions.

I do also think most users who want to stay on one version will want to stay at an LTS version, meaning 2019.4 or 2018.4 and 2019.4 will have only URP support.

But I'm sure you will support URP at some point when its more meanstream.

 

Once this update is done, I'll work on a compatibility update with 2019.3 and URP, so by the time Unity 2019.3 stable version gets released, Water 2D Tool should work with URP.

 

Great to hear! Thanks

 

Water 2D Tool v1.9 is available on the Unity Asset Store.​

Hello everyone.

Water 2D Tool v1.9 is now available on the Unity Asset Store.


Upgrade Water 2D Tool shaders and materials to LWRP.

If you download Water 2D Tool in a Unity project that uses LWRP or upgrade a project to LWRP, you will get a lot of shader errors. This is happening because by default the Water 2D Tool shaders and materials are not compatible with LWRP. To upgrade the shaders, right click on the Water2D_Tool folder, select Import Package->Custom Package. In the window that pops up go to Water2D_Tool/'Assets/LWRP folder and import Water2DTool_LWRP.unitypackage. If the error are still present in the console, clear them manually. Sometimes Unity doesn't clear them automatically even when nothing generates an error.

IMPORTANT:

• For the ripple shaders to work correctly, enable Depth Texture and Opaque Texture. This options can be enabled in the LWRP asset.
• Currently LWRP is supported only for Unity 2019.1 and 2019.2.

Differences between the LWRP and Build-in Renderer Pipeline.

When you create a GPU based water object you will see that the top mesh is positioned a little lower than it should. This happens only in the Editor. At run time the top mesh is positioned correctly.




Visually the water looks about 95% the same as in the Build-in Renderer Pipeline.

Build-in Renderer Pipeline.


LWRP.



The excetion is, how the water looks when the camera is below the water line. Because of how the LWRP works its impossible to make the bottom of the top mesh look like in the Build-in Renderer Pipeline. In the Build-in Renderer Pipeline you can grab the contents of the screen, by using GrabPass in the shader and you could do that whenever you needed it. This meant you could stack multiple transparent objects with distortions and they would be rendered correctly. In LWRP there is no GrabPass. There is an alternative called _CameraOpaqueTexture, but this is a global GrabPass performed only once after all the opaque objects are rendered. So if you have multiple transparent objects that need the content of the screen behind them to perform some kind of image distortion and these objects are overlaying, only the last one will be visible. As a result of this, you can't see the top mesh when the camera was below the water line. To fix this problem I change the render queue of the top mesh material when the camera is below the water line, so that it is drawn before the LWRP performs the global GrabPass, but as you can see from the image below, it doesn't look exactly like in the Build-in Renderer Pipeline.

Build-in Renderer Pipeline.


LWRP.


The way the water looks depends mostly on how the scene looks and what deep and shallow water colors you use, so its possible to hide the fact that the water uses an unlit shader.

Best regards,
Nicrom.

 

Hi, is it possible to make the ripples move with the flow? Im making a game where there is a stopped ripple source, and i want to make it look like the water is flowing.

 

Hi. I'm sorry, but currently this is not possible.

 

Hey!

How can i make thewater more transparent?
I am making a game where i will be diving under water and it is hard to see the character.

Thank you.

 

Hi.

I assume you are taking about the GPU based water. If so, then for the front mesh you can use the Opacity slider to decrease the water opacity. Also try to disable the toggle Fog.

Best regards,
Nicrom.

 

Hello, I just bought the asset from asset store but I am having a problem with ripple damping on mobile. I tried to tweak the damping value but this problem still persists. You can see that the waves get wild on the right of the screen. Can you help me, please?

 

Hi.

This is happening because, some mobile devices do not support the Render Texture format and Filter mode, used by Water 2D Tool GPU based water.

Open the Water2D_Ripple script, go to line 75 and try to change

Code (CSharp):

1. private RenderTextureFormat rtFormat = RenderTextureFormat.RFloat;

to

Code (CSharp):

1. private RenderTextureFormat rtFormat = RenderTextureFormat.RHalf;

Also go to line 414 and change

Code (CSharp):

1. bufferCurrent.filterMode = FilterMode.Trilinear;

to

Code (CSharp):

1. bufferCurrent.filterMode = FilterMode.Bilinear;

This should fix the problem for some devices.

 

@Pauleta , I forgot to mention, this problem seems to affect only the devices that use the OpenGLES2 or OpenGLES3 Graphics API. Those that use the Vulcan API are not effected.

 

Hi @Pauleta, I'm sorry for getting back to you so late.

I tested on my Redmi Note 7 and found than setting the FilterMode to Point fixes the problem when using OpenGLES2 or OpenGLES3 Graphics APIs.

Open the Water2D_Ripple script and on line 413 make sure FilterMode is set to Point

Code (CSharp):

1. bufferCurrent.filterMode = FilterMode.Point;

Also on line 75 change the code back to this

Code (CSharp):

1. private RenderTextureFormat rtFormat = RenderTextureFormat.RFloat;

 

This looks like an amazing asset. Wonderful effects!

Before i buy it, I'd need to know whether it supports my usecase though:
Does it support air pockets?
That would mean having a cut-through mesh that forms a cave which is half-filled with water and thus have a surface inside. Outside the mesh should be water too and another "main" surface way above. The water of the cave should seamlessly connect with the water around.

Huge thanks!

 

Hi

Hi. I'm sorry but, the water mesh can only be a rectangle and can't have holes in it. The front and top of the water are 2 separate game objects, each with its own rectangle mesh.

Best regards,
Nicrom.

 

Wow, thank you for the fast answer!
Hmm, I had the most hope in your asset in this regard (compared to other UW effect ones). Is there a specific reason that the water mesh can only be rectangular? I am proceduraly generating the cave mesh already (and also a flat shape for everything the player cannot see), so I could create the right shape of mesh for water too if that is the main issue. Rectangular water-surface would not be a problem.

 

The Water 2D Tool code expects the water to be a rectangle so if for example you want the front mesh to have holes, it would require some major modifications to the code.

 

The reflection works the first time I add it to the game, but if I try to turn off the game and press start again it causes this error - How can I fix?

MissingComponentException: There is no 'Camera' attached to the "New Water2D_TMReflection-79131944-for-SceneCamera" game object, but a script is trying to access it.
You probably need to add a Camera to the game object "New Water2D_TMReflection-79131944-for-SceneCamera". Or your script needs to check if the component is attached before using it.
ThreeEyedGames.DecaliciousRenderer.OnPreRender () (at Assets/Assets - Effects/Decalicious/Scripts/DecaliciousRenderer.cs:109)
UnityEngine.Camera:Render()
Water2DTool.Water2D_PlanarReflection:RenderReflectionFor(Camera, Camera) (at Assets/Water2D_Tool/Assets/Scripts/Utils/Water2D_PlanarReflection.cs:281)
Water2DTool.Water2D_PlanarReflection:RenderHelpCameras(Camera) (at Assets/Water2D_Tool/Assets/Scripts/Utils/Water2D_PlanarReflection.cs:141)
Water2DTool.Water2D_PlanarReflection:WaterTileBeingRendered(Transform, Camera) (at Assets/Water2D_Tool/Assets/Scripts/Utils/Water2D_PlanarReflection.cs:158)
Water2DTool.Water2D_PlanarReflection:OnWillRenderObject() (at Assets/Water2D_Tool/Assets/Scripts/Utils/Water2D_PlanarReflection.cs:169)
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr)

 

Hi,

I am working in my solo indie game in Unity 2D and I also bought you Water 2D Tool solution, but I am having a problem to solve in it, let see if you can help me.

Reading your guide I noticed that the water meshes cannot be rotated, and I wanted to rotate the top mesh so the its waves appear in my 2D game with ortographic camera, as the image attached try to show.

So I tought why not change the positions in Y axis of the last half of the vertices (as enumerated in the guide the last half of the vertices are the ones (in the top mesh) that are further away from the camera) so the mesh can be seen in camera as I desire.

I dont know if you can understand what I explained, but the top mesh must "fake" a perspective as I do in my tilemaps (in the water mesh will be real perspertive though), so I thought changing the Y value of the vertices further away from camera would work. Can you help me find were I must change the code, because I am totally lost digging. I tried lots of things without success.

Thanks in advance. Love your work.

 

Hi.

Open the Water2D_Tool script, go to

Code (CSharp):

1. GenerateTopMeshDataWithTiling()

method, line 699 and paste

Code (CSharp):

1. if (z == 1)
2.       vertPos.y += 1f;

before the line below.

Code (CSharp):

1. ChildDMesh.AddVertex(vertPos, UV, true);

This will move the back of the top mesh 1m above the water line. You can change 1f with another value. After you save the script, resize the water so that the mesh is rebuild or press Rebuild Water Object button. Also make sure the Z Segments field value is 1.

 

Hi, any plans for HDRP support?

 

Hi. I am currently busy with other projects and do not have the time to work on porting the shaders to HDRP, but that may change in the future.

 

Hello. Is there any tutorial to make skybox reflection 2D water? I tried follow the setting in BigLake_Lit but didn't succeed.

 

Hello @dragondragoon4.

Can you show me a screenshot of the problem you have?.

By the way I have a Discord server. If you want, you can join. It will be easier for me to help you with your problem

 

Hi

I want to make an endless 2D runner based on your water.
I animated water to moving blocks, as in the animation tutorial.

A ship can change its direction of movement.

When a ship changes direction (from left to right), the waves also change their direction and velocity. Why?

How can I keep the direction of wave motion independent of the movement of a block of water and keep the velocitys the same?

I already read a similar question, where did you advise turning to the list with speeds. If this solution is suitable and could you please explain in more detail how I can do this.

Many thanks!

 

Hi.

Can you record a small video that showcases the issue you have?

 

Thanks for the quick response

 

From what I can see, the direction of the waves stays the same when the ship changes movement directions. When the ship starts to move in the oposite direction of the wave movement, it creates the ilusion that the waves move faster.

 

Fixed, sorry for the spent time
Thx for your job!

 

Asked by mail early last month, but probably ended up in the spam (no reply), posting it here in case someone else is trying to achieve something similar and running into the same problem.

---
Wanted to see how difficult it would be to integrate your asset in my project and while experimenting with it I ran into a weird issue, possibly a bug in unity, but since it's reproducible I thought I'd at least show. It's a bit long to explain, so bear with me.

So, in the 2d renderer, with blur posteffect on a background camera in non-HDR using stacking, when the walls move the water doesn't 'fill the gap'. Captured everything in a video, but the video-capture doesn't show things like context menu's opening, so details below. To see the issue, skip to the end at 2:20 where the walls start moving:

Repro steps:
- starting a new URP project
- Import water 2d tool (upgrade project shaders).
- select scene Sandbox_01
- create a new base camera, child of main-cam
- edit urp/runtime/scriptablerenderer and change camerastacking from false to true // not yet officially supported(!)
- select main camera, change to overlay
- select new camera, add maincamera to the stack (not possible without the urp/runtime change).
- enable postprocessing on new camera (not on maincam)
- add global volume, add override, "bokeh" and set it to some high value (so it's obvious it is blurring)
- create 2d experimental renderer
- set the active universalRP to use the 2d renderer (instead of default forward renderer)
- disable HDR
- create new layer "BackgroundLayer"
- Set Background + all children in hierarchy to be part of this layer
- Set culling mask of the new camera to only BackgroundLayer
- Set culling mask of the maincamera to all except BackgroundLayer

Run the scene. Background wil be nicely blurred.
However where the walls move, the water looks broken.

Disabling HDR will "fix" it however also disables posteffects, probably a unity bug.
Disabling posteffect also "fixes" it.
Using the forward renderer works (both when HDR is enabled or disabled).

But it's not possible to have a nicely blurred background/posteffect + working water in the 2d renderer.

Admitted, stacked camera's are not officially supported in the 2d experimental renderer, and it's quite likely this is a bug in Unity itself, so understandable if you don't want to further investigate.
---

Note that in the meanwhile one of the Unity developers mentioned the 2d renderer will get official support for camera stacking in the next URP update, so maybe the problem will "solve itself" (alternatively I'll post a bugreport with Unity at that point).

 

Hi @rboerdijk.

I've checked my email and found no missed emails. Not sure what happened. Can you tell me your email?

I'll look into this issue and see if I can find what causes this behaviour.

By the way, if you use Discord, you can join my Discord server. It will be easer for me to help you with your issue.

Best regards,
Nicrom.

 

@rboerdijk I think I found the problem. You need to enable the "Post Processing" toggle on both cameras.
In my project this fixed the issue.

 

Hi @Nicrom. Just got your tool for a small game and like it so far. I have a problem though:
I need to have a UI-Knob at the bottom of my screen, but the water asset somhow blocks OnDrag-recognition. UI-Buttons work but not dragging. Hope you can help.

 

Hi @King_of_L1mbs. What version of Unity do you use and what type of water? By the way, if you use Discord, you can join my Discord server. It will be easer for me to help you with your issue.

 

Oh, I'm sorry! Just realized I had messed up my code and it was pure coincidence that the drag stopped working right where the waterline began.
Thanks for the quick reply though!

 

Does this work in VR?

 

Hi, I do not have a VR device, so I can't say for sure if it works or not

 

I would be using this for Oculus Quest 2 development. I think it strips out depth buffer from shaders. Is this something the asset relies on?

 

The GPU based ripple water shaders use the depth. These are the shaders that have real time reflections

 

Thanks for the quick response. Maybe I’ll give it a try and see if it works.
Is there an easy way to add foam where object interact with the water or shoreline?

 

The GPU based water shaders have foam simulation.

 

Is the shader a geometry shader?

here is an article I was just reading put out by Oculus on some of the issues:
https://developer.oculus.com/blog/p...d-when-developing-for-mobile-vr/?locale=en_US

 

No, Its not a geometry shader. The unlit shader is a vertex/fragment shader and the lit shader is a surface shader.

 

Hey Nicrom,
Thank you for this tool! It really fits the feeling of the project I'm working on.
That said, I'm running into a problem where the ambient waves just stop working. No other advanced feature is used, just that. Is there anything in particular I should be doing to make sure that the method for that runs?

 

Hi.
What version of Unity are you using?
What pipeline are you using Built-In, LWRP or URP?

 

Built-In Pipe Line, Unity 2019.4.3f1
- GPU 2.5D Water with Box Collider.

Here's an odd thing. If I enable it, and start Play, it starts up for a second and then the waves go flat.

However if I disable it, and start it while in Play mode, the waves work the way they're supposed to. Doing the same thing by flipping the ambientwaves variable in code does not work.

 

Can you record a video of the issue?
By the way, if you use Discord you can join my Discord server. It will be easier for me to help you with your issue.