当前位置：网站首页>[unity entry program] make my first little game

palyground The project is an official introductory video for novices , Preset a encapsulated development environment , Let's get started , To get familiar with the game concept and production process , It's easier to operate ！

2 Create a new scene

Assets -> Scene Right click -> Create -> Scene, Create a new scene .

Click the name to rename , Name it PlaneAsteroid

Double click this Scene object , On the right side of the Hierarchy The window will show the current scene object .

By default, the engine will also create ： Player camera Main Camera And directional light Directional Light Two objects .

3 Create player ships

In this “ The spaceship ” In the small game of , Players operate spaceships , Therefore, the player object of this game is the spaceship ！

We will use the imported playground The resources in the project are ok .

Asesets -> Images -> Spaceships, Choose your favorite spacecraft , Add to scene , There are two ways to add to a scene ：

Drag directly to Scene In the view , This method can directly implement objects stay Scene Positioning in
Drag onto Hierarchy Window , This method can be implemented in Create a parent-child relationship while joining

3.1 Resize position

The initial spacecraft was too big , stay Game Click Run in the view , Is this

So we need to shrink it a little , Exit the running state -> Choose SpaceshipRed object -> R key , Zoom .

meanwhile , If you want to zoom accurately , On the right side Inspector window -> Transform Under the hierarchy Scale, Enter a value .

It can also be opened Scale Lock button , Realization XYZ Three way proportional scaling , What I choose here is to zoom to 0.2.

You can stay here again Game View run view , The size is more comfortable .

3.2 adjustment Game View background

In the course UP The background color of the game view is different from mine , I also want to make it solid , I found it on the player's camera Main Camera Of Inspector Change in .

Main Camera -> Inspector -> Camera -> Clear Flags&Background, You can see the initial sky box , This is changed into Solid Color And set the color to black .

3.3 Inspector -> rename & change Tag

According to the tutorial , stay Inspector Change the name of the spacecraft in the window -> ship, stay Hierarchy The name in the window will also be automatically synchronized .

About Unity The label of （Tag）

unity official ： label - Unity manual

stay Unity in ,Tag Is a reference word assigned to one or more game objects , Play the role of identification 、 The role of distinction ;
The same kind of model , It can be set as a unified label ;
You can find objects by labels ;

The rest, such as how the code is written , later , Here, give our spacecraft an object first Player Of Tag.

4 The ship moves

Direct use playground Written in the project Move Script will do , Click on the one on the right Inspector Look at the code .

So how to assign the script to our spacecraft ？ There are two ways ：

A way for laymen —— hold Move Drag script to ship Of Inspector In the window ;
Compare the suggested way —— from ship Of Inspcetor Window Add Component add to

After adding , You can see that there is one more attribute Rigidbody 2D And a Move With Arrows, about 2D Rigid body components Rigidbody 2D I have made a preliminary study summary ：Unity Study -2D rigid body Rigidbody 2D

the other one Move With Arrows It is a component created by programming to control game objects through the keyboard .

5 Add obstacles and collisions

5.1 Add obstacles

Asesets -> Images -> Asteroids, Choose asteroids to join Scene in , And size it .

5.2 Add collision -> obstacle

add to ModifyHealth Script components

playground A script component for changing blood volume has been packaged for us in the project .

Asserts -> Scripts -> Attributes -> ModifyHealthAttribute

adopt Add Component Add this script component to the obstacle just now , When joining, we need to choose ：

This component needs to add a 2D Colliding body （Collider 2D） To achieve collision , Here you need to choose the type of collision , Because of our obstacles —— Asteroids are irregular objects , Here you can choose polygon.

About 2D Colliding body , You can see another blog I introduced ：Unity Study -2D Colliding body Collider 2D_flashinggg The blog of

You can see , This encapsulated component contains ：

Modify Health Components —— Realize the operation of blood loss after the aircraft touches it

Polygon Collider 2D 2D Colliding body —— To achieve collision detection , Both planes and meteorites should be collision bodies , Therefore, we need to add a collider component to the meteorite , Be careful , This cannot be a trigger , So we need to get rid of Is Trigger Check box ;

add to 2D Rigid body components

We also want to achieve the effect of a little movement after the meteorite is collided , Therefore, we need to give a meteorite Rigidbody 2D Of 2D Rigid body components , And properly adjust the parameter value of the rigid body , Do you , Simulate the real effect .

5.3 Add collision -> The spacecraft

It's mentioned above , To achieve collision, both must be collision bodies , Therefore, we also need to add one to the spacecraft Polygon Coliider 2D Components .

6 Add blood reducing effect

6.1 Add user interface

playground The project also encapsulates the components of such a user interface , Search for interface find UserInterface Drag the component into the... On the right Hierarchy Just a window .

6.2 Realize the operation of reducing blood volume

Blood volume control is accomplished by the following two parts

Obstacles have Modify Health—— Change your HP after collision

The ship's own HP , Need to add a Health System Component to set the initial health

After all the above , When the mobile spacecraft collides with an obstacle meteorite , The upper left corner will reduce HP .

7 Add background

Still use the drawings provided by the project ,images -> Backgrounds, hold Space Drag in Hierarchy Just go .

However, the size of the drawing and the background drawing need to be modified 、 The plane 、 Layer order of obstacles , Avoid obstructions .

7.1 Adjust the layer order

The layer order is in the Sprite Renderer Revision in China , my unity2021.3 Version can be modified directly layer In order to adjust ：

BG_Space -> 0
ship&Asteroid2 -> 1

We can avoid the background blocking our spacecraft and obstacles .

7.2 Adjust the background size

Here the size is set to

Final effect ：

8 Add precast units

Because the game has more than one obstacle , Multiple obstacles will also be added , But a series of properties of obstacles should be the same , And that's where it comes in unity Prefabricated parts in , Namely A reusable resource template .

About the creation and use of prefabricated parts ：Unity Study - Preforms Prefab_flashinggg The blog of

After adding several obstacles , Adjusted the size and style , The result is shown in Fig. ：

9 Add stars to get points

This is the last part of the game , If you need to join, you can ” eat “ And ” eat “ The function of getting scores after .

9.1 Join the stars

Project Window search star, And drag in Hierarchy window

It needs to be revised Star Layer order ,Order in Layer Change to 1 that will do .

9.2 Add the score component

It's still Star Of Add Component -> Search for Collectable

After joining, you can find , Synchronization requires the addition of an impactor assembly , choice polygon Just go .

Be careful , there Polygon Collider 2D Of Is Trigger You need to check , Here we can reach “ Touch the stars and eat ” The effect of .

Collectable The above content in the script is the implementation ： After the plane hit the stars -> score++ -> Stars disappear , The effect of , Specific preparation will be carried out after C# Learning from .