323 lines
10 KiB
C++
323 lines
10 KiB
C++
#include <iostream>
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#include <cmath>
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#include <ctime>
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#include "includes/raylib-cpp/raylib-cpp.hpp"
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#include "includes/paddle.hpp"
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#include "includes/ball.hpp"
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#include "includes/easysock.hpp"
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#include "includes/sign.hpp"
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#include "includes/connect-helpers.hpp"
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#include "includes/client.hpp"
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#include "includes/server.hpp"
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/* Global variables used to instantiate structs */
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const int WIDTH = 1500;
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const int HEIGHT = 600;
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const int RECT_H = HEIGHT / 3;
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const int RECT_W = 30;
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const int PADDLE_SPEED = 8;
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const int CIRC_RAD = 10;
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const float BASE_BOUNCE_DEG = 45;
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const float BASE_BOUNCE_RAD = (BASE_BOUNCE_DEG / 180.0) * M_PI;
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const float BASE_SPEED_COMPONENTS = 18;
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const float BASE_SPEED = sqrt(powf(BASE_SPEED_COMPONENTS, 2) * 2);
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typedef enum {M_SINGLE, M_CLIENT, M_SERVER} Mode;
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/* This struct contains a Mode enum, which indicates the type of game we are
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playing (Single player, client mode or server mode). The netsock parameter is
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a 'Sock' object - Client and Server classes inherit from this object, so this
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parameter can be instantiated to either a client or server, depending on the
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game type. */
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typedef struct {
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Mode mode;
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Sock* netsock;
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} GameType;
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raylib::Vector2 changeVelocityAfterCollision(Paddle paddle, Ball ball) {
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float paddle_mid_y = (paddle.getRect().y + paddle.getRect().GetHeight()) / 2.0; /* Middle y value of rectangle */
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float ball_y = ball.pos.y; /* Y co-ordinate of ball */
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float offset = paddle_mid_y - ball_y; /* Subtracting the ball coordinate will give us a value between -paddle_mid_y (represents bottom of paddle) and +paddle_mid_y (represents top of paddle) */
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offset /= (paddle.getRect().GetHeight()); /* Normalize the value, by dividing it by its maximum magnitude. It is now a value between -1 and 1. */
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offset *= 0.8 + (float)(std::rand()) / (float) (RAND_MAX / ( 1.2 - 0.8)); // Generate a random float from 0.8 to 1.2
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float bounce_angle = offset * BASE_BOUNCE_RAD; /* Calculate the actual bounce angle from the base bounce angle. */
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/* Calculate new velocities as multiples of the original velocity. I use sine and cosine, because when the ball hits the paddle
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perpendicular to it (bounce angle is 0), the y_velocity should be 0 (i.e. It should bounce straight back). The sin function does
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this for us. A similar reasoning was employed for the use of cosine */
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float new_x_vel = abs(BASE_SPEED * cosf(bounce_angle)) * (-1 * signum(ball.vel.x)); /* Reverse the sign of the x-velocity */
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float new_y_vel = abs(BASE_SPEED * sinf(bounce_angle)) * signum(ball.vel.y); /* Keep the sign of the y-velocity */
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return raylib::Vector2(new_x_vel, new_y_vel);
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}
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/* This function checks the command-line arguments passed to the program.
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It then decides whether the game is in Server or Client mode (or neither), and
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instantiates the appropriate object. The (uninitialized) objects are passed to the
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function as pointers. It returns a GameType struct, that indicates whether the game
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is in server, client or single player mode, and contains the appropriate socket object. */
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GameType check_server_client(int argc, char** argv) {
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std::string connect_code;
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std::vector<std::string> addr_port; /* Vector to store (IPv4) address and port */
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GameType type;
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if (argc < 2) { /* Game was not started in client or server mode */
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type.mode = M_SINGLE;
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type.netsock = nullptr;
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return type;
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}
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/* GAME STARTED IN CLIENT MODE */
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if (strcmp(argv[1],"-C") == 0) {
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if (argc < 3) { /* No address was provided */
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throw EXCEPT_TOOFEWARGS;
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}
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connect_code = std::string(argv[2]); /* The connect code is a special string, that contains the server address and port. It is given by the server. */
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try {
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addr_port = connect_code::decode(connect_code);
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Client* client = new Client(4, 'T', addr_port[0].data(), std::stoi(addr_port[1]));
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type.mode = M_CLIENT;
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type.netsock = client;
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return type;
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} catch (int e) {
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throw;
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} catch (std::exception& e) {
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throw;
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}
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}
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/* GAME STARTED IN SERVER MODE */
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else if (strcmp(argv[1],"-S") == 0) {
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std::string addr;
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uint16_t port;
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/* No IP address or port specified */
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if (argc < 3) {
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throw EXCEPT_TOOFEWARGS;
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}
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/* IP address but no port */
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else if (argc < 4) {
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std::cout << "No port specified, using 6500..." << std::endl;
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addr = std::string(argv[2]);
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port = 6500;
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} else {
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addr = std::string(argv[2]);
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port = std::stoi(std::string(argv[3]));
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}
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/* Check if IP is valid */
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if (check_ip_ver(addr.data()) < 0) {
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throw EXCEPT_INVALIDIP;
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}
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std::string code = connect_code::encode(addr, std::to_string(port));
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std::cout << "Your code is " << code << std::endl;
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try {
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Server* server = new Server(4, 'T', addr.data(), port);
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type.mode = M_SERVER;
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type.netsock = server;
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return type;
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} catch (int e) {
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throw;
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}
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catch (std::exception& e) {
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throw;
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}
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}
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else {
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throw EXCEPT_INVALIDARGS;
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}
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}
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int main(int argc, char** argv) {
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/* Check if game was started in server or client mode, and set appropriate variables */
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/* GameType struct, to define whether the game is in single or muilti-player mode, and
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to hold the appropriate socket */
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GameType type;
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try {
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type = check_server_client(argc, argv);
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} catch(int e) {
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if (e == EXCEPT_TOOFEWARGS) {
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std::cout << "Started in client mode, but no address was specified." << std::endl;
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return -1;
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}
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if (e == EXCEPT_INVALIDARGS) {
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std::cout << "Invalid argument." << std::endl;
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return -2;
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}
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if (e == EXCEPT_CONNREFUSED) {
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std::cout << "Connection refused. Wrong IP address or port specified." << std::endl;
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return -3;
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}
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if (e == EXCEPT_ADDRNOTAVAIL) {
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std:: cout << "Unable to use requested address for server." << std::endl;
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return -4;
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}
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if (e == EXCEPT_INVALIDIP) {
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std::cout << "Invalid IP address provided." << std::endl;
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return -5;
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}
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} catch(std::invalid_argument& inv) {
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std::cout << inv.what() << std::endl;
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return -6;
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}
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#ifdef DEBUG
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type.mode = M_CLIENT;
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#endif
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/* Initialize window and other variables */
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SetTraceLogLevel(LOG_INFO);
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raylib::Window window = raylib::Window(WIDTH, HEIGHT, "Pong");
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window.ClearBackground(BLACK);
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SetTargetFPS(60);
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SetExitKey(KEY_Q);
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std::string points_str = std::string("0\t\t0");
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bool game_started = false;
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srand(std::time(NULL));
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/* Instantiate Paddle and Ball objects */
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Paddle pad1 = Paddle(10, (HEIGHT / 2) - (RECT_H / 2), RECT_W, RECT_H);
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Paddle pad2 = Paddle(window.GetWidth() - RECT_W - 10, (HEIGHT / 2) - (RECT_H / 2), RECT_W, RECT_H);
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Ball ball = Ball(window.GetWidth()/2, window.GetHeight()/2, CIRC_RAD, BASE_SPEED, 0);
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window.BeginDrawing();
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pad1.draw();
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pad2.draw();
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ball.draw();
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window.EndDrawing();
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/* Main loop */
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while (!window.ShouldClose()) {
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if (!game_started) {
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if (IsKeyDown(KEY_SPACE)) {
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game_started = true;
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}
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}
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if (game_started) {
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/* Receive response from the other machine, if the game is in multiplayer mode */
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std::string response = "";
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if (type.mode != M_SINGLE) {
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#ifdef DEBUG
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response = "";
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#else
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std::string response = type.netsock->recvAll();
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#endif
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}
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std::string to_send = "";
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/* Update paddle velocity */
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/* Left paddle (controlled by client) */
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/* Up motion */
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if (IsKeyPressed(KEY_S) || response == "D1") {
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pad1.velocity.y = PADDLE_SPEED; /* Set positive (downward) velocity, since (0,0) is top-left */
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if (type.mode == M_CLIENT) { /* If this machine controls this paddle, Send the key press to the other machine */
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to_send = "D1";
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}
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}
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/* Down motion */
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if (IsKeyPressed(KEY_W) || response == "U1") {
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pad1.velocity.y = (-1) * PADDLE_SPEED; /* Set negative (upward) velocity */
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if (type.mode == M_CLIENT) {
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to_send = "U1";
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}
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}
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/* Stop */
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if ((IsKeyReleased(KEY_S) || IsKeyReleased(KEY_W)) || (response == "S1")) {
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pad1.velocity.y = 0;
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if (type.mode == M_CLIENT) {
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to_send = "S1";
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}
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}
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/* Right paddle - controlled by server*/
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if (IsKeyPressed(KEY_DOWN)) {
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if (type.mode == M_SERVER) {
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type.netsock->sendAll(std::string("D"));
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}
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pad2.velocity.y = PADDLE_SPEED;
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}
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if (IsKeyPressed(KEY_UP)) {
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if (type.mode == M_SERVER) {
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type.netsock->sendAll(std::string("U"));
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}
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pad2.velocity.y = (-1) * PADDLE_SPEED;
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}
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if (IsKeyReleased(KEY_UP) || IsKeyReleased(KEY_DOWN)) {
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if (type.mode == M_SERVER) {
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type.netsock->sendAll(std::string("S"));
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}
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pad2.velocity.y = 0;
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}
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/* Update ball velocity based on collision detection */
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if (pad1.getRect().CheckCollision(ball.pos, ball.radius)) { /* Collision with paddle 1 */
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ball.pos.x = pad1.getRect().x + pad1.getRect().GetWidth() + ball.radius + 1; /* Ensuring that the ball doesn't get stuck inside the paddle */
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ball.vel = changeVelocityAfterCollision(pad1, ball);
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}
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if (pad2.getRect().CheckCollision(ball.pos, ball.radius)) { /* Collision with paddle 2 */
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ball.pos.x = pad2.getRect().x - ball.radius - 1;
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ball.vel = changeVelocityAfterCollision(pad2, ball);
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}
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if (ball.pos.x + ball.radius >= window.GetWidth()) { /* Collision with right wall */
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pad1.incrementPoints();
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game_started = false;
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ball.reset();
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pad1.reset();
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pad2.reset();
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}
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if (ball.pos.x - ball.radius <= 0) { /* Collision with left wall */
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pad2.incrementPoints();
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game_started = false;
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ball.reset();
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pad1.reset();
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pad2.reset();
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}
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if (ball.pos.y - ball.radius <= 0) { /* Collision with top wall */
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ball.pos.y = ball.radius + 1;
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ball.vel.y = ball.vel.y * -1;
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}
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if (ball.pos.y + ball.radius >= window.GetHeight()) { /* Collision with bottom wall */
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ball.pos.y = HEIGHT - ball.radius - 1;
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ball.vel.y = ball.vel.y * -1;
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}
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/* Update positions based on velocities */
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pad1.updatePosition();
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pad2.updatePosition();
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ball.updatePosition();
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}
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/* Draw objects */
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window.BeginDrawing();
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window.ClearBackground(BLACK);
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points_str = std::to_string(pad1.getPoints()) + "\t\t" + std::to_string(pad2.getPoints());
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raylib::Text::Draw( points_str, (WIDTH / 2) - 30, HEIGHT / 10, 30, raylib::Color::White() );
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pad1.draw();
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pad2.draw();
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ball.draw();
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window.EndDrawing();
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}
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window.Close();
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sock_quit();
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return 0;
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}
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