This article uses Unity Version is Unity2018.4.36f1, The scripting language is C#

introduction ： 

In the last article , A brief introduction to TileBase Class and its methods ,TileBase As all customizations tile Parent class of , Its own method has no content （ Only one empty implementation is provided ）, If we write it ourselves tile If you inherit it , You also need to write some code to realize the most basic Tile function （ Even the normal display in Palette and Scene You need to write it yourself ）, So in order not to repeat some of the most basic functions , We wrote it ourselves tile It is better to inherit Tile class （ This class is also officially provided ）, because Tile Class has helped us realize the most basic tile function （ Of course, if your needs are really special , For example, there are some basic functions that do not need , It doesn't have to inherit from Tile class ）. So this article Let's focus on Tile class , Study its source code , It can help us better understand the specific uses of various methods .

Text ：

Tile class :

Unity English document introduction ：

The Tile class is a simple class that allows a sprite to be rendered on the Tilemap
. Tile inherits from TileBase. 

Unity Introduction to Chinese documents ：

Tile  Class is a simple class that allows rendering sprites on tile maps .Tile Inherited from  TileBase.

Unity Scripting API Introduce ：

Class for a default tile in the Tilemap.This inherits from TileBase and represents a default tile to be placed in a Tilemap. It implements TileBase.GetTileData for simple rendering of a Sprite in the tile map.

translate ： This class is Tilemap Default tiles used in . It is inherited from TileBase And act as placed on Tilemap Default tile in , It rewrites TileBase Of GetTileData Method , In order to realize the tilemap Simple image rendering in .

It's still Unity Scriptable API The introduction is more detailed . We can see ,Tile yes TileBase Subclasses of , And rewritten TileBase Some of the ways （ In fact, there is only one ）, So that those methods are no longer just empty methods .

Detailed introduction ：

One 、 Member variables ：

Tile Like 6 Member variables , Look at the following code ：

public Sprite sprite;
public Color color = Color.white;
public Matrix4x4 transform = Matrix4x4.identity;
public GameObject gameobject = null;
public TileFlags flags = TileFlags.LockColor;

public ColliderType colliderType = ColliderType.Sprite;

1.sprite： The type of this property is Spirte type , Its function is to store the picture of the tile .

2.color： The type of this property is Color type , Its function is to store the color of the tile .

3.transform： The type of this property is Matrix4x4, I don't understand its function , It should be used for matrix transformation of the coordinates of tiles , This is of little use （ I didn't find any use for tiles ）.

4.gameobject： The type of this property is GameObject, Its function is to store a game object attached to the tile （ It will be explained in detail later ）.

5.flags： The type of this property is TileFlags, Its function is to control Tile Some behaviors of , For example, whether the color can be changed in the editor, and so on . Here is TileFlags Type of introduction ：

TileFlags

Description

Flags controlling behavior for the TileBase.   Flags Controlled TileBase act .

Properties

This type is enumeration type , When setting the attribute value, you should set it according to the setting method of enumeration type .

6.colliderType: The type of this property is ColliderType, His role is to specify Tile Collider type . Here is ColliderType Detailed introduction ：

ColliderType

Description

Enum for determining what collider shape is generated for this Tile by the TilemapCollider2D.

This type is an enumeration type , Based on TilemapCollider2D Tile collider shape generation style .

Properties

The above is the introduction of all attributes .

The following is the introduction of the method .

Two 、 Method ：

All of the following methods are either fully inherited TileBase Class method , Or it is rewritten TileBase Methods , No new method . Methods are called at exactly the same time .

1.RefreshTile Method ：

public void RefreshTile(Vector3Int location, ITilemap tilemap)

This method is simply inherited TileBase, The call timing is exactly the same .

2.GetTileData Method ：

The call timing is consistent with that of the parent class . This method is right TileBase Of GetTileData Method rewrite , Let's take a detailed look at the content of this method .

public override void GetTileData(Vector3Int location, ITilemap tilemap, ref TileData tileData)
{
    tileData.sprite = this.sprite;
    tileData.color = this.color;
    tileData.transform = this.transform;
    tileData.gameobject = this.gameobject;
    tileData.flags = this.flags;

tileData.colliderType = this.colliderType;
}

We know from the code , It will Tile Each member of the class is assigned to a parameter tileData The members of , This TileData It's actually a structure , Here are TileData Introduction to ：

TileData

Implemented in:UnityEngine.TilemapModule

Description

A Struct for the required data for rendering a Tile.      This is a structure , Store the information needed to build tiles .

Properties

We can find this TileData Structures are designed to store the information needed to build tiles .

GetTileData Methods will Tile The member variable of the class is assigned to the parameter tileData Member variables in , It is equivalent to building a structure full of construction information , because tileData Parameters have ref Keyword modification , therefore tileData It can be regarded as a return value and passed to the whole system , Then the system gets the information about how to build tiles at a certain location , You can work normally .

3.GetTileAnimationData Method ：

public bool GetTileAnimationData(Vector3Int location, ITilemap tilemap, ref TileAnimationData tileAnimationData)

This method is simply inherited TileBase Of GetTileAnimationData Method , Still an empty method , The call timing is exactly the same .

Let's take a look at TileAnimationData What is the type ：

 public struct TileAnimationData
    {
        public Sprite[] animatedSprites { get; set; }
        public float animationSpeed { get; set; }
        public float animationStartTime { get; set; }
    }

We can see that this structure has three properties .

The first is Sprite[] Array type animatedSprites, Used to store the images that make up the animation .

The second is Float Type of animationSpeed, Used to confirm the playback speed of animation .

The third is Float Type of animationStartTime, Used to determine the delay time of animation broadcast .

4.StartUp Method ：

public bool StartUp(Vector3Int location, ITilemap tilemap, GameObject go)

This method is simply inherited TileBase Of StartUp Method , Still an empty method , The call timing is exactly the same .

There's nothing to say .

good , Then we already know Tile Class structure ,Tile Class mainly adds some public member variables to store the construction information of tiles , And then in GetTileData() Method to pass the values of these member variables into the reference parameters tileData in .

In the next article, I will start to build a system based on Tile Class customization tile, Explain in detail the methods that have not been discussed in detail .

Link to the next article ：

(32 Bar message ) Unity2D Customize Scriptable Tiles To understand and use （ Two ）—— By understanding Tile Class to TileBase Class method （ Mainly GetTileData Method ） Understand in detail _see Rebirth blog -CSDN Blog