LEARN COCOS2D 2 (THIRD EDITION) PDF
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Class method, what is cc?
And all the classes, functions, properties, and constants in the engine code are defined in this namespace. And Class is a method under the cc module, which is used to declare classes in the Cocos Creator. To make it easier to differentiate, we call the class declared with cc. Class called CCClass. The parameter of the Class method is a prototype object, the required class can be created by setting the desired type parameter in the form of a key-value pair in the prototype object.
Class method and assigns it to the Sprite variable. The class name is also set to sprite. Class names are used for serialization, which can generally be omitted. For cc. Class detailed learning can refer to Declare class with cc. Now we go back to the code editor and look back at the code, which is the structure needed to write a component script.
Scripts of such a structure are the components in Cocos creator, which can be mounted on the nodes in the scene and provide various functions that manipulate nodes. First, we will set up some properties and see how to adjust them in the scene. Cocos Creator stipulates that a node has attributes that need to be written in the properties code block, which will specify how the protagonist moves, and we don't need to care about what the values are in the code, because we'll set these values directly in the Properties.
Later in the game production process, we can put the properties that need to be adjusted at any time in properties. Now we can add the Player component to the node of the main character.
Now we can see the newly added Player component in the Properties panel of the Player node. Set up properties related to the jumping and movement of the main character according to the image below: Only jumpDuration's unit is seconds. The unit of the other values is pixels. According to the current setting of the Player component: Our main character will have a jump height of pixels. The time needed for jumping to the highest point is 0.
Its maximum horizontal movement speed is pixels per second. Its horizontal acceleration is pixels per second.
All these numeric values are suggestions. Later when the game is running, you can modify these numeric values in the Properties panel at anytime according to your preference, no need to change any codes. Writing code for jumping and movement Next we will add a method to make the main character jump.
Because the action system is more complex, here is a simple introduction. In simple terms, the action is the displacement, scaling, and rotation of a node in Cocos Creator. For example, in the above code, the moveBy method is used to move a specified distance within a given time, the first parameter is the jump time we defined in the main character properties, and the second parameter is an Vec2 representing 2D vector and coordinate type objects.
We can find that the second parameter can be passed in two types, the first is Number type, the second is Vec2 type, if we pass in here is Number type, then the default parameter is X coordinate, then fill in the third parameter Y coordinate.
This means that the physics engine will not apply forces to the monster. Instead, you'll control it directly through the MoveTo actions you created earlier. Here, you set the category, collision and contact test bit masks: Category: defines the object's type — Monster.
Collision: defines what types of objects should physically affect this object during collisions — in this case, None. Because this object is also dynamic, this field has no effect but is included here for the sake of completeness.
Contact Test: defines the object types with which collisions should generate notifications — Projectile.
You'll register for and handle these notifications just a bit later in the tutorial. Finally, you assign the physics body to the monster.
Note that it's not absolutely necessary to set the contact test bit mask because the monsters are already checking for collisions with projectiles, but it helps make your code's intention more clear. Build and run your project now; you'll see red shapes superimposed over your physics bodies, as shown below: Your projectiles are set up to hit monsters, so you need to remove both bodies when they collide.
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Remember that physics world from earlier? Well, you can set a contact delegate on it to be notified when two physics bodies collide. There you'll write some code to examine the categories of the objects, and if they're the monster and projectile, you'll make them go boom! First, add the following method declaration to HelloWorldScene.
Next, implement the following method in HelloWorldScene.
In this game, you know that the only objects colliding will be monsters and projectiles. Therefore, you get the nodes involved in the collision and remove them from the scene.
Finally, you need to register to receive contact notifications.
Cocos2d-x Tutorial for Beginners
Now, whenever two physics bodies collide and their category bit masks match their contact test bit masks, the EventDispatcher will call onContactBegan. Build and run your app; now when your projectiles intersect targets they should disappear: Most ninjas are silent, but not this one! Time to add some sound to your game. Cocos2d-x comes with a simple audio engine called CocosDenshion which you'll use to play sounds. Note: Cocos2d-x also includes a second audio engine designed to replace the simple audio engine module.
However, it is still experimental and it is not available for all the supported platforms, so you won't use it here. The project already contains some cool background music and an awesome "pew-pew" sound effect that you imported earlier. You just need to play them! To do this, add the following code to the top of HelloWorldScene. Next, add the following defines to HelloWorldScene. This simply keeps your filenames in a single place, which makes it easier to change them later.
Organizing your code like this or even better, using a completely separate file makes it easier to support platform-specific changes like using. Pretty handy, eh?
You can play a sound effect with only a single line of code. It is provided for general information only and should not be relied upon as complete or accurate. Sorry, we can't translate this content right now, please try again later. Intel held the challenge to foster developer creativity in enhancing the user experience with Ultrabook devices.
Participants had six weeks to develop original applications that integrated touch, gesture, and voice functionality. Finalhit Ltd. The game enables players to use the keyboard and mouse, touch, or device tilting to keep a beach ball from touching the ground see Figure 1. Live Ball is the first game the company has developed.
Figure 1. Live Ball main menu and play screen Initial Development Steps For the challenge, the first task for the team was to find a 2-D game engine platform. The 2-D game engine had to: Be simple to use and easy to learn Include a physics engine Be extendable to add support for touch and sensors Support cross-platform functionality, including mobile phones After extensive research, the team chose Cocos2d-x , which supports all desktop and mobile platforms, is an open source project, and is easily extendable.
It is open source and therefore fully extensible. The team also needed to choose the right programming language. The team selected this option based on their familiarity with programming Desktop applications as well as the limited timeframe, as more time would have been needed for Windows Store app development.
Even with Desktop development taking less time, the biggest challenge for the team was the short deadline.The effect is as illustrated below: In this way our scene's basic artistic content is set up.
Initial Development Steps
Sets the sprite to be dynamic. And then all of our scripts will be stored here. Class names are used for serialization, which can generally be omitted. This is huge for indie game devs!
Declare your callback to receive touch notifications in HelloWorldScene. In order to receive events from the EventDispatcher , you need to register an EventListener.
Quick Start：Make your first game
It sets its y-position to a random value to keep things interesting. This is one example of vector math in Cocos2d-x. Its horizontal acceleration is pixels per second.