Explain prefabrication in unity in detail

Preface

stay Unity in , The function of prefabrication is to reuse resources , For example, the flowers and trees in the game world 、 House building . These resources are recurring , We can make it into a prefabricated body , Easy to reuse . Prefabrication is also divided into original prefabrication and variation , In this article, let's talk about their differences .

Front row reminders ： This article only represents personal views , For exchange and learning , If you have different opinions, please comment , The author must study hard , Day day up .
When reading this article , If there is something you don't understand , It is recommended to watch the references listed in this article for comparison .

Unity edition [2019.4.10f1] Dream small day young & Prohibited reproduced

Video Explanation ：
Detailed explanation Unity The prefabrication of _BiLiBiLi

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One 、 How to make a preform

The function of prefabrication is to reuse resources , Therefore, objects that are reused in the scene should be made into prefabricated bodies as much as possible and then dragged into the game

For externally imported model resources , Import is in the form of a prefabricated body

Anything that can be dragged into Hierarchy Panel , Can be made into prefabricated bodies , Including but not limited to models 、UI、 Mount the empty object of the script .

1. Make a preform

2. Function and difference

Modifying a prefab instance does not affect the original prefab

Modifying the original prefabrication will affect all prefabrication instances

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Two 、 Preform variants

1. Make preform variants

The icon of the prefab variant is slightly different from that of the original prefab , Please make a distinction between .

When you drag a game object that is already a prefab into Assets At the window , Pop up window will prompt , Do you want to create another original prefab or a variant of the original prefab . We choose the second option , Then the preform variant is created successfully .

2. Original preform VS Preform variants

Prefabrication has several branch concepts , Please don't confuse

Here we can use the concept of object-oriented to understand , The primitive prefab is the base class , The original prefab instance is the instance object of the base class , Modifying the instance object of the base class has nothing to do with the base class , Modify the base class itself , It will affect all base class instances .

A prefab variant is a derived class of the original prefab （ Subclass ）, Subclasses are also affected by base classes , But it can also be different from the base class , The difference is not affected by the base class , Subclasses can also New example , It's called a prefab variant instance .

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3、 ... and 、 Precast body covering 、 Sync

When you are in Hierarchy The preform is modified in the window , It is not synchronized to its original preform , because Hierarchy All the prefabricated bodies are examples of prefabricated bodies , What if you synchronize the prefab instance to its original prefab ？

It is not difficult for us to find from the demonstration diagram , If a new one is added to the current precast instance Cube, Then the picture appears “+” Number , This means this Cube Newly added , It is not owned by the original preform itself , You have two choices at this time ：

Reset to the shape of the original preform
Synchronize the current modification to the original preform

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5、 ... and 、 Precast body nesting

If you already know the above , Preform nesting is for you , It shouldn't be a problem , We already know that the original prefabrication experience has an impact on the example , Is the original prefab composed of multiple original prefabs more flexible , You can adjust any details in different prefabricated bodies , Finally, it will have an impact on an example of precast body .

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6、 ... and 、 Summary and references

1. summary

Come here , If you can flexibly use the original preform 、 Preform variants 、 Precast body nesting 、 Examples of precast units , Already can play a lot of tricks , come on. .（ Attach a form ）

2. Reference material

1. Own diligence and wisdom
2. official API And documentation
3. Your own clever brain