Please somebody help me out with this..

Question about the task

Snake (Part 6/20)

Games, Level 0, Lesson 1

Under discussion

Two of the requirements are not getting satisfied. Can anyone please tell me where I made the mistake?

Once we have a snake, we need to draw it. To do this, by analogy with the Apple class, create HEAD_SIGN and BODY_SIGN constants in the Snake class. They will store symbols for drawing the head and body of the snake. Also, create a draw(Game) method to draw the snake on the playing field.

We'll handle drawing the snake from the SnakeGame class. So, create a Snake snake variable in the SnakeGame class: it will store the snake's current state.

In the createGame() method, create a new snake in the center of the playing field and assign it to the snake variable. In the drawScene method(), call the draw(Game) method on the snake to draw it on the playing field.

Requirements:

The Snake class must have a private static final String HEAD_SIGN field that is initialized when it is declared. For example, you can use this UTF-16 symbol: "\uD83D\uDC7E".
The Snake class must have a private static final String BODY_SIGN field that is initialized when it is declared. For example, you can use this UTF-8 symbol: "\u26AB".
The Snake class must have a public void draw(Game) method.
The draw(Game) method must call the Game class's setCellValue(int, int, String) method on each GameObject in the snakeParts list.
The setCellValue(int, int, String) method must be called with arguments (x, y, HEAD_SIGN) on the snake's head (the element with index 0 in the snakeParts list).
The setCellValue(int, int, String) method must be called with arguments (x, y, BODY_SIGN) on each segment of the snake's body (elements with non-zero indices in the snakeParts list).
The SnakeGame class must have a private Snake snake field.
The SnakeGame class's createGame() method must create a new snake (instance of the Snake class) with coordinates (WIDTH / 2, HEIGHT / 2) before calling the drawScene() method.
The createGame() method must assign the created Snake object to the snake field.
In the drawScene() method, the snake object's draw(Game) method must be called last. Pass this to the method.
The Snake class must have a statement that imports the entire contents of the com.codegym.engine.cell package.

package com.codegym.games.snake; import com.codegym.engine.cell.*; public class SnakeGame extends Game{ public static final int WIDTH = 15, HEIGHT = 15; private Snake snake; public void initialize() { setScreenSize(WIDTH,HEIGHT); createGame(); } private void createGame() { snake = new Snake(WIDTH/2,HEIGHT/2); drawScene(); //Apple apple = new Apple(7,7); //apple.draw(this); } private void drawScene() { for(int x=0;x<WIDTH;x++) { for(int y=0;y<HEIGHT;y++) { setCellColor(x,y,Color.DARKSEAGREEN); } } snake.draw(this); } }

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Jay

Level 0

31 October 2019, 15:44

Instead of initializing the global class variable values of x, y in the below method game.setCellValue(x,y,HEAD_SIGN); You need to call it on the GameObject obj instance like below which will initialize the GameObject constructor (x, y) variables when the Snake class new instance is created in SnakeGame class. Correct way --> game.setCellValue(obj.x,obj.y,HEAD_SIGN);

Guadalupe Gagnon

Level 37 , Tampa, United States

21 October 2019, 14:04

lines 29 and 31, your reference to x and y only use the class variables x and y and not each snake part (obj.x and obj.y). This code draws the entire snake on one cell only.