Messages

1

Graphics / Can't get snake to grow

« on: January 13, 2024, 11:35:59 am »

This question was probably asked here a 1000 times, but I don't really know how would I implement it. I made a circleShape head and a vector of circleShape for a body. I don't understand how would I position them behind the head or how could they follow the head.

#ifndef SNAKE_HPP
#define SNAKE_HPP
#include <SFML/Graphics.hpp>
#include <iostream>
#include <vector>
using namespace std;

class Snake : public sf::Drawable {
public:
        sf::CircleShape head;
        vector<sf::CircleShape> body;
        sf::Vector2f pos;
        sf::Vector2f bodyPos;
        Snake();
        ~Snake();
        virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const;
        void drawSnake();
        void move();
        void grow();
};


#endif

#include "Snake.hpp"
Snake::Snake() {
        pos = sf::Vector2f(0, 0);
}

Snake::~Snake() {

}

void Snake::drawSnake() {
        head.setRadius(12);
        head.setFillColor(sf::Color::Black);
        head.setPosition(400, 300);
}

void Snake::draw(sf::RenderTarget& target, sf::RenderStates states) const {
        target.draw(head);
       
}

void Snake::move() {
        head.move(pos);
   
}

void Snake::grow() {
    sf::CircleShape part;
}

If anyone has some advice I would appreciate it. This is my first time using SFML.

2

Window / Re: Using switch case to change states, but its not working

« on: January 12, 2024, 01:22:21 pm »

So i added the breaks, but now my snake wont move.

3

Window / Using switch case to change states, but its not working

« on: January 12, 2024, 12:19:07 pm »

#include <SFML/Graphics.hpp>
#include <SFML/Graphics/Color.hpp>
#include "MainMenu.hpp"
#include "Game.hpp"
#include "Snake.hpp"
#include "Food.hpp"
#include "GameOver.hpp"
#include <ctime>

enum class GameState {
    MainMenu,
    Game,
    GameOver
};

int main() {
    srand(time(NULL));
    sf::RenderWindow window(sf::VideoMode(800, 600), "Zmija");
    sf::Texture texture;
    sf::Font font;
    sf::Text text;

    texture.loadFromFile("assets/grass.png");
    font.loadFromFile("assets/Salsa-Regular.ttf");
    MainMenu menu(font, "Zmija");
    GameOver over(font, "Game Over?");
    Game game;
    Snake snake;
    Food food;
    snake.drawSnake();
    game.textures();
    menu.startSetColor(sf::Color::Yellow);
    GameState state = GameState::MainMenu;
    texture.setRepeated(true);
    game.grass.setTexture(texture);
    game.grass.setTextureRect(sf::IntRect(0, 0, 800, 600));
    while (window.isOpen()) {
        sf::Event event;
        while (window.pollEvent(event)) {
            if (event.type == sf::Event::Closed)
                window.close();
        }
        switch (state) {
        case GameState::MainMenu:
        {
            if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up)) {
                menu.startSetColor(sf::Color::Yellow);
                menu.exitSetColor(sf::Color::White);
                if (sf::Keyboard::isKeyPressed(sf::Keyboard::Enter))
                    state = GameState::Game;
            }
            if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down)) {
                menu.startSetColor(sf::Color::White);
                menu.exitSetColor(sf::Color::Yellow);
                if (sf::Keyboard::isKeyPressed(sf::Keyboard::Enter))
                    window.close();
            }
        }
        case GameState::Game:
        {
           
            if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up)) {
                snake.pos = sf::Vector2f(0, -0.2);
            }
            else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down)) {
                snake.pos = sf::Vector2f(0, 0.2);
            }
            else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left)) {
                snake.pos = sf::Vector2f(-0.2, 0);
            }
            else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right)) {
                snake.pos = sf::Vector2f(0.2, 0);
            }
            //udaljenost izmedu zmije i hrane
            int dist2p = sqrt(pow((snake.head.getPosition().x - food.food.getPosition().x), 2) + pow((snake.head.getPosition().y - food.food.getPosition().y), 2));
            if (snake.head.getRadius() + food.food.getRadius() >= dist2p) {
                food.food.setPosition(rand() % 770, rand() % 570);
            }
            //Sudar sa zidom
            if (snake.head.getPosition().x < 20.f)
                state = GameState::GameOver;
            if (snake.head.getPosition().y < 20.f)
                state = GameState::GameOver;
            if (snake.head.getPosition().x > 755)
                state = GameState::GameOver;
            if (snake.head.getPosition().y > 555.f)
                state = GameState::GameOver;
        }
        case GameState::GameOver:
        {
            if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up)) {
                over.retrySetColor(sf::Color::Yellow);
                over.exitSetColor(sf::Color::White);
                snake.head.setPosition(400, 300);
                if (sf::Keyboard::isKeyPressed(sf::Keyboard::Enter))
                    state = GameState::Game;
            }
            if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down)) {
                over.retrySetColor(sf::Color::White);
                over.exitSetColor(sf::Color::Yellow);
                if (sf::Keyboard::isKeyPressed(sf::Keyboard::Enter))
                    window.close();
            }
            snake.move();
            window.clear();
        }
       
    }
        switch (state) {
        case GameState::MainMenu:
            window.draw(menu);
            break;
        case GameState::Game:
            window.draw(game);
            window.draw(food);
            window.draw(snake);
            break;
        case GameState::GameOver:
            window.draw(over);
            break;
        }
        window.display();
    }
    return 0;
}

So my problem is, every time I press Up it returns my snake to the original position, but I don't understand why because I am in a state of Game, and not in a state of GameOver. I am new to SFML.