need help

Question about the task

Moon Lander (Part 11/23)

Games, Level 0, Lesson 4

Resolved

i don't know where the width field is exactly pls tell me :(

At the moment, the rocket can fly beyond the bounds of the playing field. Let's fix that. We’ll create a special method that will check whether the rocket has reached the left, right, or top edge of the screen. If the rocket reaches one of these edges, we’ll keep it within the playing field. The call to this method must be the last action in the move method.
There’s no need to check whether the rocket has reached the bottom edge of the screen, since that’s where the landscape is. We’ll check for collision with the landscape later.

Requirements:

The Rocket class must have a private void checkBorders() method.
In the checkBorders() method, if the value of the x field is less than zero, set it to 0.
In the checkBorders() method, if the value of the x field is less than zero, set the speedX field to 0.
In the checkBorders() method, if the sum of the x and width fields is greater than the width of the game field (MoonLanderGame.WIDTH), set the x field to (MoonLanderGame.WIDTH - width).
In the checkBorders() method, if the sum of the x and width fields is greater than the width of the game field (MoonLanderGame.WIDTH), set the speedX field to 0.
In the checkBorders() method, if the value of the y field is less than zero, set it to 0.
In the checkBorders() method, if the value of the y field is less than zero, set the speedY field to 0.
The last action in the move(boolean, boolean, boolean) method must be a call to the checkBorders() method.

package com.codegym.games.moonlander; public class ShapeMatrix { public static final int[][] ROCKET = new int[][]{ {0, 0, 0, 6, 0, 0, 0}, {0, 0, 6, 6, 6, 0, 0}, {0, 0, 6, 0, 6, 0, 0}, {0, 0, 6, 6, 6, 0, 0}, {0, 0, 6, 0, 6, 0, 0}, {0, 0, 6, 6, 6, 0, 0}, {0, 6, 6, 0, 6, 6, 0}, {6, 6, 6, 6, 6, 6, 6}, {6, 0, 0, 6, 0, 0, 6}, }; public static final int[][] LANDSCAPE = new int[][]{ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 3, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 3, 0, 0, 0, 0, 0, 0}, {3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 3, 0, 0, 0, 0, 0, 0}, {3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 3, 0, 0, 0, 0, 0}, {0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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Nouser

Level 36 , Germany

18 August 2020, 07:59

ShapeMatrix.LANDSCAPE is a reference variable and not a number. To get the size of the array you can use length, like int sizey = ShapeMatrix.LANDSCAPE.length; or int sizex = ShapeMatrix.LANDSCAPE[0].length; (that's the x size for y = 0)

dhanush

Level 30 , Chennai, India

18 August 2020, 08:14

Yeah actually i'm very confused while doing this the requirement asks for If the sum of the x and width field i thought that may be landscape may the width field. And i realized that i should declare the width field in the GameObject class it i passed the task a week before itself. Thanks for helping me. :)