Handling method of occasional error reporting on overseas equipment

1） Handling method of occasional error reporting on overseas equipment
​2）Shader Redundancy rule ShaderLab Occupation size problem
3）URP Renderer Feature Realize quadratic element tracing ,Cutout To deal with the problem
4）Unity Solution for video playback in

---

This is the first 286 piece UWA Push of technical knowledge sharing . Today we continue to select and develop a number of 、 Optimization related issues , Suggested reading time 10 minute , If you read it carefully, you will get something .

UWA Question answering community ：answer.uwa4d.com
UWA QQ Group 2：793972859（ The original group is full ）

Android

Q： Recent projects occasionally show errors in pictures on overseas equipment ：

 

A： This problem has been confirmed as Unity Of bug, Due to recent Google Play To enforce AAB pack , So the probability is that ; The general test is to use APK, It's easy to miss this last step of verification . to update Unity After the corresponding version, you can repair ：

May refer to ：
https://issuetracker.unity3d.com/issues/application-freezes-or-throws-errors-when-built-as-an-aab-file-with-split-application-binary-enabled

thank [email protected] The Q & a community provides answers

---

Shader

Q：Shader Redundancy rule ShaderLab Will the occupation also become larger ?

A： Experiment on a real machine , see Shader When redundant ShaderLab Memory changes .
Here are Shader There is 20 Share Standard when ：

Here are Shader There are only 1 Share Standard when ：

because Profiler Can't see ShaderLab Specific content of , So strictly speaking ,Shader Redundancy does cause ShaderLab Memory increase .

thank [email protected] The Q & a community provides answers

---

Rendering

Q： Before, our cartoon rendering was in Shader Write more than Pass To draw the stroke , Recently I tried to use SRP Batcher Found during optimization ,SRP Batcher Does not support multiple Pass Of Shader. So I tried URP Renderer Feature To render the stroke of all characters .

It's easy to implement , But there is one problem that cannot be solved , Namely Cutout The problem of .

The lower edge of the skirt is mapped Alpha The control of the , It's not really a vertex . Former Pass Written in character rendering Shader in , You can use maps to control , But with Renderer Feature To deal with it , The stroke of all character models uses the same material , You can't use the respective mapping channels of the model to deal with . The display effect is Cutout The stroke part of cannot be processed ：

 

The edges are complicated , But there are only a few control vertices , It doesn't feel good to realize .

Now I have used the color information of model vertices ,RGB It's the stroke color ,A Is the stroke thickness . The way I can think of is to use A Some special values to deal with some vertices （ amount to Clip Drop some vertices , But it's definitely not relevant API）, But it doesn't seem feasible . I don't know if you've ever met , Or is there any good way ？

I tried to mark points with vertex information , But there are flaws , The edges associated with the points are affected , The stroke is gone ：

Let the art add some points , It can basically solve （ In fact, the outer edge will not show all , But I can't see it anymore ）：

But this method is still not good . Best in Renderer Feature You can get the material information of the model being rendered .

Can you put more than one Pass Of Shader One of them Pass Get a separate Renderer Feature Li Hua , Instead of redrawing ？ For example, disable this for the first time Pass,Renderer Feature Turn it on when you draw ？

A1： Customize a LightMode,Render Feature Set this in LightMode, In this way, the mapping data on the shader can be .

Add a screenshot that looks like this ：

 

For custom LightMode,Unity Default ignore , Only Render Feature It is manually specified to draw this LightMode,Unity To draw .

thank [email protected] The Q & a community provides answers

A2： as follows , such SRP Batcher Finally, we can get more together Pass Of Shader 了 ：

Don't disable normal rendering .

Two pass, A normal pass, A custom lightMode Of pass,lightMode Of pass For rendering stroke ScriptableRendererFeature Manually specify a custom rendering lightmode.unity I won't render your custom lightMode.

Thanks to Qiu Lei @UWA The Q & a community provides answers

---

Video

Q： Need to play video in the game , Meet some basic needs , For example, play remote video , Broadcast as you go down , Set the video playback speed , Video progress bar , Pause or something .

Currently known, you can use your own Video Player、AVPro and Sofdec2 These three paragraphs , I'd like to ask if there is any big guy system that has studied video playback , Can share a little experience , Thank you for .

A： Consider integration  https://github.com/bilibili/ijkplayer  To Unity Play adaptation on ：
https://www.gero.pub/2017/10/26/how-to-use-ijkplayer-in-unity/

thank [email protected] The Q & a community provides answers

The cover map comes from the Internet

---

Today's sharing is here . Of course , There is no end to life but to know . In the long development cycle , The problems you see may be just the tip of the iceberg , We are already in UWA The Q & a website has more technical topics waiting for you to explore and share together . You are welcome to join us , Maybe your method can solve other people's urgent needs ; And he's a mountain “ stone ”, Can also attack you “ jade ”.

Official website ：www.uwa4d.com
Official technology blog ：blog.uwa4d.com
Official Q & a community ：answer.uwa4d.com
UWA School ：edu.uwa4d.com
Official technology QQ Group ：793972859（ The original group is full ）