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CodeGym/Cursos/Colecciones de Java/Gran tarea: Crear un juego en Java

Gran tarea: Crear un juego en Java

Colecciones de Java
Nivel 3, Lección 15
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"¡Hola, amigo!"

"¡Hola!"

"¿Cómo vas a dirigirte a un oficial superior?"

"Lo siento, señor."

"Hola, Capitán Ardillas, señor".

"Eso es mejor."

"Tienes una nueva misión secreta hoy".

Java webinar

"Necesitas escribir una simulación de batalla espacial".

"¡Genial! Uhh... Quiero decir, estoy listo, señor".

"Da la casualidad de que tengo una idea para ello. ¿Qué tal esto?"

Gran tarea: Crear un juego en Java - 1

"No, eso es demasiado difícil".

"Comenzaremos con algo más simple:"

Gran tarea: Crear un juego en Java - 2

"Mmm..."

"¿Qué? ¿Todavía demasiado difícil? Entonces hagámoslo aún más simple".

"Comuníquese con el agente IntelliJ IDEA para recibir la tarea. Ya la tiene".

"¿Permiso para hacer una pregunta, señor?"

"Hablar."

"¿Por qué llama agente a IntelliJ IDEA, señor? Es solo un programa".

"Eres sólo un programa".

"IDEA es una inteligencia artificial y un miembro de la tripulación de nuestra nave. ¿Está todo claro? Ponte en marcha".

"¡Sí, señor! Cumpliendo su orden, señor".

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Tarea
Colecciones de Java,  nivel 3,  lección 15
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Space (part 1)
Let's write a new computer game. We'll have a spaceship that will shoot rockets at UFOs. For their part, the UFOs will lob bombs at the spaceship. And, of course, all this is happening in outer space. We're going to need the following classes: Space, Spaceship, and Ufo.
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Space (part 2)
We will have bombs and rockets. That means we need Bomb and Rocket classes. Create them. Our classes will have a lot in common. They will move about in space and be drawn on the screen. That means that they'll all have coordinates and a size.
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Space (part 3)
Why do we need the Space class? To store all the objects and control how they interact. What fields should it have? width and height. What else?
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Space (part 4)
What is Space class missing? That's right! run() and draw() methods. If you recall, the run method manages all the game logic. And the draw method is responsible for drawing the next "frame". We'll also benefit from a sleep(int ms) method.
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Space (part 5)
Now let's move on to the BaseObject class. I want to make some suggestions. First, for simplicity, treat all of our objects in space as circles. We'll draw them as shapes, just as before. But when calculating object collisions, we'll assume they are round. Doing it this way is much simpler.
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Space (part 6)
But there's more. The BaseObject class needs more methods. For now, these will be empty draw() and move() methods. Subclasses will have to override them and implement the necessary functionality. Also add a die() method, which causes the object to die (isAlive = false).
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Space (part 7)
Now let's tackle the Canvas class. It will contain a matrix that we will "draw" on. The matrix has a width and height. And we'll use it to store characters (chars) rather than numbers (ints).
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Space (part 8)
What are we going to do with Canvas? We'll draw on it (on its matrix). Therefore, we need two methods: public void setPoint(double x, double y, char c), public void drawMatrix(double x, double y, int[][] matrix, char c).
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Space (part 9)
Canvas needs another two methods. Write them. a) the clear() method(); This method will clear the matrix so it can be drawn on again. For example, replace all characters in the matrix with spaces. b) the print() method(); This method draws the matrix on the screen.
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Tarea
Colecciones de Java,  nivel 3,  lección 15
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Space (part 10)
Now we'll write the Bomb class. Everything is simple here. Bomb inherits BaseObject. Here's what we need: a) change the constructor.
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Space (part 11)
Now we'll write the Rocket class. It's almost the same as the Bomb class. But: a) Rockets fly upward (i.e. y is decreased by 1); b) We'll draw 'R' instead of 'B'.
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Space (part 12)
Now let's do the ship. For complexity, we'll do this: if the user presses the left button, the ship will start moving to the left and continue to do so. If the user presses the right button, it will start moving to the right and continue to do so until it hits the edge.
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Space (part 13)
We now turn to the draw and move methods. In the move() method, you need to: a) increase x by dx; b) check to see whether the ship has moved beyond the boundaries of outer space [0, Space.game.getWidth()]. Use the checkBorders method. Bear in mind that the ship's width is equal to twice its radius.
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Space (part 14)
Now write the Ufo class. It's a bit more complicated than the Bomb class and simpler than Spaceship. You will need draw(), move(), and fire() methods. Also, don't forget about the constructor. The parameters are doubles, and UFO's radius will be equal to 3.
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Space (part 15)
We still have to finish the Space class. Implement the getAllItems method: The method should return one common list of all BaseObject objects. Implement the moveAllItems method: The method should move all the objects all at the same time.
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Space (part 16)
And a little bit more: Implement the createUfo() method: If the list of UFOs is empty, create a ship in the center at the top of the screen. Implement the checkBombs() method: You need to check whether a bomb collided with the ship.
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Colecciones de Java,  nivel 3,  lección 15
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Space (part 17)
We need to finish the draw() method. We'll do something similar with the move method. I'll write it myself today.
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Colecciones de Java,  nivel 3,  lección 15
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Space (part 18)
Make width and height bigger and you can play! Enjoy the game :)
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