bialasik__ Posts - Answer Overflow

bialasik__

•Created by bialasik__ on 3/9/2023 in #help

❔ I am trying to make a simple game in C# console.

Problem: Whenever the player character goes out of bounds/ touches the border, I get an exception. I want the player to bounce back/ stop at the border. I was thinking of resetting velocity, but this doesnt seem to work.

    static void Main(string[] args)
    {
        Game game = new Game();

        Vec playerPosition = new Vec(Console.WindowWidth / 2, Console.WindowHeight / 2);
        Vec playerVelocity = new Vec(0, 0);
        char playerSymbol = 'O';
        GameObject player = new GameObject(playerPosition, playerVelocity, playerSymbol);
        game.AddGameObject(player);

        float deltaTime = 0.2f;
        while (true)
        {
            game.Update(deltaTime);
            game.Draw();

            if (Console.KeyAvailable)
            {
                ConsoleKeyInfo keyInfo = Console.ReadKey(true);
                if (keyInfo.Key == ConsoleKey.LeftArrow)
                {
                    player.velocity.x = -1;
                }
                else if (keyInfo.Key == ConsoleKey.RightArrow)
                {
                    player.velocity.x = 1;
                }
                else if (keyInfo.Key == ConsoleKey.UpArrow)
                {
                    player.velocity.y = -1;
                }
                else if (keyInfo.Key == ConsoleKey.DownArrow)
                {
                    player.velocity.y = 1;
                }
            }
            Thread.Sleep(16);
        }

    static void Main(string[] args)
    {
        Game game = new Game();

        Vec playerPosition = new Vec(Console.WindowWidth / 2, Console.WindowHeight / 2);
        Vec playerVelocity = new Vec(0, 0);
        char playerSymbol = 'O';
        GameObject player = new GameObject(playerPosition, playerVelocity, playerSymbol);
        game.AddGameObject(player);

        float deltaTime = 0.2f;
        while (true)
        {
            game.Update(deltaTime);
            game.Draw();

            if (Console.KeyAvailable)
            {
                ConsoleKeyInfo keyInfo = Console.ReadKey(true);
                if (keyInfo.Key == ConsoleKey.LeftArrow)
                {
                    player.velocity.x = -1;
                }
                else if (keyInfo.Key == ConsoleKey.RightArrow)
                {
                    player.velocity.x = 1;
                }
                else if (keyInfo.Key == ConsoleKey.UpArrow)
                {
                    player.velocity.y = -1;
                }
                else if (keyInfo.Key == ConsoleKey.DownArrow)
                {
                    player.velocity.y = 1;
                }
            }
            Thread.Sleep(16);
        }

3 replies

CC#

•Created by bialasik__ on 1/10/2023 in #help

❔ LinkedList

            List<string> people = new()
            {
                "Xavier", "Alex",
                "James", "Laura",
                "Adil", "Cheryl",
                "Charlie"
            };
            LinkedList<string> classList = new();

            char[] alpha = "bcdefghijklmnopqrstuvwxy".ToCharArray();
            foreach(string person in people)
            {
                LinkedListNode<string> firstNode = classList.First;
                person.ToLower();
                if (person.StartsWith('a'))
                {
                    firstNode = classList.AddFirst(person);
                }
                else if (person.StartsWith('z'))
                {
                    classList.AddLast(person);
                }
                else
                {
                    for (int i = 0; i < alpha.Length; i++)
                    {
                        if (person.StartsWith(alpha[i]))
                        {
                            if (firstNode == null)
                            {
                                firstNode = classList.AddFirst(person);
                            }
                            classList.AddAfter(firstNode, person);
                        }
                    }
                }
            }

            List<string> people = new()
            {
                "Xavier", "Alex",
                "James", "Laura",
                "Adil", "Cheryl",
                "Charlie"
            };
            LinkedList<string> classList = new();

            char[] alpha = "bcdefghijklmnopqrstuvwxy".ToCharArray();
            foreach(string person in people)
            {
                LinkedListNode<string> firstNode = classList.First;
                person.ToLower();
                if (person.StartsWith('a'))
                {
                    firstNode = classList.AddFirst(person);
                }
                else if (person.StartsWith('z'))
                {
                    classList.AddLast(person);
                }
                else
                {
                    for (int i = 0; i < alpha.Length; i++)
                    {
                        if (person.StartsWith(alpha[i]))
                        {
                            if (firstNode == null)
                            {
                                firstNode = classList.AddFirst(person);
                            }
                            classList.AddAfter(firstNode, person);
                        }
                    }
                }
            }

I then tried:

            foreach(string person in people)
            {
                LinkedListNode<string> firstNode = classList.First;
                person.ToLower();
                if (person.StartsWith('a'))
                {
                    classList.AddFirst(person);
                }
                else
                {
                    for (int i = 0; i < alpha.Length; i++)
                    {
                        if (person.StartsWith(alpha[i]))
                        {
                            classList.AddLast(person);
                        }
                    }
                }
            }

            foreach(string person in people)
            {
                LinkedListNode<string> firstNode = classList.First;
                person.ToLower();
                if (person.StartsWith('a'))
                {
                    classList.AddFirst(person);
                }
                else
                {
                    for (int i = 0; i < alpha.Length; i++)
                    {
                        if (person.StartsWith(alpha[i]))
                        {
                            classList.AddLast(person);
                        }
                    }
                }
            }

5 replies

CC#

•Created by bialasik__ on 12/27/2022 in #help

❔ Lexer and parser, cannot get expressions to formulate as they should, have a look at the output...

8 replies

CC#

•Created by bialasik__ on 12/23/2022 in #help

❔ Linux Mint .NET is installed but cmds such as run, new console, etc. are not recognised...

I am thinking of switching to Linux but cannot get .NET SDK and runtime installed correctly for some reason, even when following the official Microsoft documentation. They only provided instructions for Ubuntu and other distributions, but not Mint, however I read that Mint is based on Ubuntu so I don't see why this should not work. Any help would be appreciated! 🙂

6 replies

CC#

•Created by bialasik__ on 12/7/2022 in #help

❔ Dereference of a possibly null reference.

            do {
                try {
                    choice = char.Parse(Console.ReadLine().ToUpper()); // <<< this line throws the warning

                    switch (choice) {
                        case 'P':
                            Console.WriteLine("Ok");
                            break;
                        case 'Q':
                            Environment.Exit(0);
                            break;
                        default:
                            Console.Write("Try again: ");
                            break;
                    }
                }
                catch (Exception) {
                    Console.Write("Try again: ");
                }
            }
            while (choice != 'P' || choice != 'Q');

            do {
                try {
                    choice = char.Parse(Console.ReadLine().ToUpper()); // <<< this line throws the warning

                    switch (choice) {
                        case 'P':
                            Console.WriteLine("Ok");
                            break;
                        case 'Q':
                            Environment.Exit(0);
                            break;
                        default:
                            Console.Write("Try again: ");
                            break;
                    }
                }
                catch (Exception) {
                    Console.Write("Try again: ");
                }
            }
            while (choice != 'P' || choice != 'Q');

21 replies

CC#

•Created by bialasik__ on 11/17/2022 in #help

What is the difference between these two methods? Using params or just doing everything in one class

public static void Main(string[] args) {
  int a = 2, b = 3;
  int sum = Add(a, b)
}

public static int Add(int a, int b) {
  return a + b;
}
//5 variables

public static void Main(string[] args) {
  int a = 2, b = 3;
  int sum = Add(a, b)
}

public static int Add(int a, int b) {
  return a + b;
}
//5 variables

public static void Main(string[] args) {
  int a = 2, b = 3;
  int sum = a + b;
}
//3 variables

public static void Main(string[] args) {
  int a = 2, b = 3;
  int sum = a + b;
}
//3 variables

i just learned this in class and dont get why this is a thing

7 replies

CC#

•Created by bialasik__ on 11/2/2022 in #help

My vscode is weird

4 replies

CC#

•Created by bialasik__ on 10/29/2022 in #help

public static variable not changing

if (choice == 'H' && coinFlip == 1 || choice == 'T' && coinFlip == 2) { playerPawn = 'O'; // one instance where i want to change this variable PlayerTurn(); ValuesCheck(); } else { playerPawn = 'X'; ComputerTurn(); ValuesCheck(); } ############################################################## public static class Globals { public static char[,] values = { { ' ', ' ', ' ' }, { ' ', ' ', ' ' }, { ' ', ' ', ' ' } }; // this changes fine in the exact same class the other variable is but playerPawn does not public static char playerPawn = ' '; }

12 replies

Gaming

Programming