UI Particle System: advanced plugin for particles in GUI [RELEASED]

It's optimized for mobiles too. Comparing to most of other solutions it's working faster.

 

Bug report: If I resize a UI Particle Depth Object in the editor at runtime, I get the following error.

Code (CSharp):

1. Destroying GameObjects immediately is not permitted during physics trigger/contact, animation event callbacks, rendering callbacks or OnValidate. You must use Destroy instead.
2. UnityEngine.Object:DestroyImmediate (UnityEngine.Object)
3. UIParticleDepthObject:RefreshRenderer (bool,bool) (at Assets/Plugins/UIParticleSystem/Scripts/UIParticleDepthObject.cs:102)
4. UIParticleDepthObject:CheckForRefeshRenderer () (at Assets/Plugins/UIParticleSystem/Scripts/UIParticleDepthObject.cs:90)
5. UIParticleCanvas:OnCanvasCameraPreRender () (at Assets/Plugins/UIParticleSystem/Scripts/UIParticleCanvas.cs:223)
6. UIParticleCanvas:OnCameraPreRender (UnityEngine.Camera) (at Assets/Plugins/UIParticleSystem/Scripts/UIParticleCanvas.cs:202)
7. UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

A similar problem occurs in a build when I drag the window from one monitor to another. The source of the error is different since it doesn't involve the Unity Editor's GUI, but it's similarly a problem with DestroyImmediate.

Code (CSharp):

1. Destroying GameObjects immediately is not permitted during physics trigger/contact, animation event callbacks, rendering callbacks or OnValidate. You must use Destroy instead.
2. UnityEngine.StackTraceUtility:ExtractStackTrace () (at C:/buildslave/unity/build/Runtime/Export/Scripting/StackTrace.cs:37)
3. UnityEngine.Object:DestroyImmediate (UnityEngine.Object) (at C:/buildslave/unity/build/Runtime/Export/Scripting/UnityEngineObject.bindings.cs:318)
4. UIParticleDepthObject:RefreshRenderer (bool,bool) (at C:/gamedev/unity/monospaced-lovers/Assets/Plugins/UIParticleSystem/Scripts/UIParticleDepthObject.cs:102)
5. UIParticleDepthObject:CheckForRefeshRenderer () (at C:/gamedev/unity/monospaced-lovers/Assets/Plugins/UIParticleSystem/Scripts/UIParticleDepthObject.cs:90)
6. UIParticleCanvas:OnCanvasCameraPreRender () (at C:/gamedev/unity/monospaced-lovers/Assets/Plugins/UIParticleSystem/Scripts/UIParticleCanvas.cs:223)
7. UIParticleCanvas:OnCameraPreRender (UnityEngine.Camera) (at C:/gamedev/unity/monospaced-lovers/Assets/Plugins/UIParticleSystem/Scripts/UIParticleCanvas.cs:202)
8. UnityEngine.Camera:FireOnPreRender (UnityEngine.Camera) (at C:/buildslave/unity/build/Runtime/Export/Camera/Camera.bindings.cs:436)

This occurs with UI Particle System 1.34 and Unity 2020.3.14.

 

Thank you for report, we will look into that soon and get back with fix to you

 

Thank you, please keep me posted.

And while we're on the topic, I ran into another issue today. I believe the UI Particle Canvas's masks don't work correctly when the canvas camera's rect is changed? To test this, try the following:

• Create a UI Particle Depth Object set to stretch (it should cover the whole canvas)
• Create a UI Particle and set it to Use Clipping Mask (it should only render when inside the aforementioned depth object)
• Change the main camera's and canvas camera's Viewport Rect to some arbitary value (eg x=0, y=0.05, w=1, h=0.9)
• Create another camera and leave it with the default Viewport Rect

It looks like the UI Particle Canvas's culling mask is taking into account some extra space at the top and bottom, so it's clipping too much. It's hard to explain, but here's a video:

As you can tell, I ran into this problem when setting up letterboxing (that's why I was fiddling with the camera rects).

 

You're positive that the mask is 1:1 same area?

 

Yep, in fact here is a unity package to make things easier: https://drive.google.com/file/d/1Ogx7CW-raYfAEpCBEL8OScEkeEnxvi4F/view?usp=sharing

That package doesn't include the UI Particle System asset itself, but it should work if you import the asset and add a layer to index 6.

Granted, I might have made a mistake or gotten confused while testing this, so let me know if that's the case.

 

@_eternal are you using URP or Standard pipeline? It has different approach for depth object and mask

 

Soon (when Unity accept package) will appear 1.35 version with fixes of your "DestroyImmediate" error @_eternal . Resize windows we will check soon, you can try to call mask resize from UIParticleCanvas, maybe it will help when you change sizes of ViewportRect (tbh no one checked cutting viewport with dark bars here)

 

Great to hear, thanks for the quick fix. I'll take a look at Mask Resize. I'm using the Built-In Render Pipeline.

 

Update: as of 1.35, I'm still getting the DestroyImmediate error in a build when I drag the window to my second monitor. Not sure yet if it still occurs in the editor, because that error was somewhat inconsistent to begin with.

Also, for what it's worth, I couldn't find anything resembling MaskResize inside of UIParticleCanvas. So I wasn't able to test that, but I think the sample project illustrates the problem pretty clearly.

EDIT: Yep, DestroyImmediate error still occurs in editor when changing aspect ratio from 16:9 to 16:10.

 

Actually, I think I was mistaken - the DestroyImmediate bug appears to be fixed now. But I think the aspect ratio bug is still present as per the sample project that I uploaded.

 

Hi @_eternal thank you for your packege, this helped us find the solution. If you won't want to wait for asset store update just add at line 135 in UIParticleCanvas.cs in method Reinitialize this:

Code (CSharp):

1. maskCamera.rect = new Rect(0, 0, 1, 1);

this should fix your issue.
(if helped, good reviews for asset are always welcome )

 

Hey, did this update ever get pushed to the asset store? I'm still seeing version 1.35 as the latest one.

 

It should be, we will check what happened (sometimes asset stuck in unity asset review on holidays)

 

1.36 released! You may notice there some issue fixes and improvements for unity 2020+

 

Nice! And yeah, I can confirm that the viewport rect problem is fixed now.

 

Hello MoDev and thank you for the plugin.
I'm struggling with a config.
In my scene I have a perspective camera, a Screen Space - Camera canvas, a button, inside the button a mask, and inside the mask the particle system. I set up everything as you did in your example, the problem is that the image of the button is always above the particles. If I disable the image component of the button, the particles appear and are masked as intended.

 

Hi.
Great job with the asset. Does it also support TMP_Text? I noticed that UIParticleMaskSourceMode only support images.
Thanks!

 

Hello now i have an error as attached pic

and also i want to know what is best way instantiate particle where mouse click position on canvas?

thanks
Dan

 

@DannyWoo about your error: you should set different layer than your ui's (for example you can create UIParticleMask layer and set it there). Please check for tutorial video it's visible there that we set different value.

About spawning particles: certainly it's not included in tool to support spawning particles (you should do it by yourself) so probably best is to ask on other forum thread. Only what I advice you here is to convert mouse position to canvas position and then to world space so you could just use Instantiate on your prefab.