src/main.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <SDL2/SDL.h>
   4
   5 #include "./player.h"
   6 #include "./platforms.h"
   7
   8 #define SCREEN_WIDTH 800
   9 #define SCREEN_HEIGHT 600
  10 #define GAME_FPS 30
  11 #define GROUND_LEVEL 200.0f
  12
  13 int main(int argc, char *argv[])
  14 {
  15     (void) argc;                /* unused */
  16     (void) argv;                /* unused */
  17
  18     int exit_code = 0;
  19
  20     if (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
  21         fprintf(stderr, "Could not initialize SDL: %s", SDL_GetError());
  22         exit_code = -1;
  23         goto sdl_init_fail;
  24     }
  25
  26     SDL_Window *window = SDL_CreateWindow("Nothing",
  27                                           100, 100,
  28                                           SCREEN_WIDTH, SCREEN_HEIGHT,
  29                                           SDL_WINDOW_SHOWN);
  30     if (window == NULL) {
  31         fprintf(stderr, "Could not create SDL window: %s", SDL_GetError());
  32         exit_code = -1;
  33         goto sdl_create_window_fail;
  34     }
  35
  36     SDL_Renderer *renderer = SDL_CreateRenderer(window, -1,
  37                                                 SDL_RENDERER_ACCELERATED |
  38                                                 SDL_RENDERER_PRESENTVSYNC);
  39     if (renderer == NULL) {
  40         fprintf(stderr, "Could not create SDL renderer: %s", SDL_GetError());
  41         exit_code = -1;
  42         goto sdl_create_renderer_fail;
  43     }
  44
  45     if (SDL_NumJoysticks() <= 0) {
  46         fprintf(stderr, "Could not find any The Sticks of the Joy\n");
  47         exit_code = -1;
  48         goto sdl_num_joysticks_fail;
  49     }
  50
  51     SDL_Joystick *the_stick_of_joy = SDL_JoystickOpen(0);
  52     if (the_stick_of_joy == NULL) {
  53         fprintf(stderr, "Could not open 0th Stick of the Joy\n");
  54         exit_code = -1;
  55         goto sdl_joystick_open_fail;
  56     }
  57
  58     printf("Opened Joystick 0\n");
  59     printf("Name: %s\n", SDL_JoystickNameForIndex(0));
  60     printf("Number of Axes: %d\n", SDL_JoystickNumAxes(the_stick_of_joy));
  61     printf("Number of Buttons: %d\n", SDL_JoystickNumButtons(the_stick_of_joy));
  62     printf("Number of Balls: %d\n", SDL_JoystickNumBalls(the_stick_of_joy));
  63
  64     SDL_JoystickEventState(SDL_ENABLE);
  65
  66     // ------------------------------
  67
  68     struct player_t *player = create_player(100.0f, 0.0f);
  69     if (player == NULL) {
  70         perror("Could not create player");
  71         exit_code = -1;
  72         goto create_player_fail;
  73     }
  74
  75     const struct rect_t platforms_rects[] = {
  76         { .x = 0.0f,
  77           .y = GROUND_LEVEL + 50.0f,
  78           .w = 50.0f,
  79           .h = 50.0f },
  80         { .x = 150.0f,
  81           .y = GROUND_LEVEL + 50.0f,
  82           .w = SCREEN_WIDTH - 150.0f,
  83           .h = 50.0f },
  84         { .x = 0.0f,
  85           .y = GROUND_LEVEL + 100.0f,
  86           .w = 50.0f,
  87           .h = 50.0f },
  88         { .x = 150.0f,
  89           .y = GROUND_LEVEL + 100.0f,
  90           .w = 50.0f,
  91           .h = 50.0f },
  92         { .x = 0.0f,
  93           .y = GROUND_LEVEL + 150.0f,
  94           .w = 50.0f,
  95           .h = 50.0f },
  96         { .x = 150.0f,
  97           .y = GROUND_LEVEL + 150.0f,
  98           .w = 50.0f,
  99           .h = 50.0f }
 100     };
 101     struct platforms_t *platforms = create_platforms(
 102         platforms_rects,
 103         sizeof(platforms_rects) / sizeof(struct rect_t));
 104     if (platforms == NULL) {
 105         perror("Could not create platforms");
 106         exit_code = -1;
 107         goto create_platforms_fail;
 108     }
 109
 110     int quit = 0;
 111
 112     const Uint8 *keyboard_state = SDL_GetKeyboardState(NULL);
 113     const Uint32 delay_ms = (Uint32) roundf(1000.0f / GAME_FPS);
 114     SDL_Event e;
 115     while (!quit) {
 116         while (SDL_PollEvent(&e)) {
 117             switch (e.type) {
 118             case SDL_QUIT:
 119                 quit = 1;
 120                 break;
 121
 122             case SDL_KEYDOWN:
 123                 switch (e.key.keysym.sym) {
 124                 case SDLK_SPACE:
 125                     player_jump(player);
 126                     break;
 127                 }
 128                 break;
 129
 130             case SDL_JOYBUTTONDOWN:
 131                 printf("Button: %d\n", e.jbutton.button);
 132                 if (e.jbutton.button == 1) {
 133                     player_jump(player);
 134                 }
 135                 break;
 136             }
 137
 138         }
 139
 140         if (keyboard_state[SDL_SCANCODE_A]) {
 141             player_move_left(player);
 142         } else if (keyboard_state[SDL_SCANCODE_D]) {
 143             player_move_right(player);
 144         } else if (SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 145             player_move_left(player);
 146         } else if (SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 147             player_move_right(player);
 148         } else {
 149             player_stop(player);
 150         }
 151
 152         update_player(player, platforms, delay_ms);
 153
 154         SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
 155         SDL_RenderClear(renderer);
 156         render_player(player, renderer);
 157         render_platforms(platforms, renderer);
 158         SDL_RenderPresent(renderer);
 159         SDL_Delay(delay_ms);
 160     }
 161
 162     destroy_platforms(platforms);
 163 create_platforms_fail:
 164     destroy_player(player);
 165 create_player_fail:
 166     SDL_JoystickClose(the_stick_of_joy);
 167 sdl_joystick_open_fail:
 168 sdl_num_joysticks_fail:
 169     SDL_DestroyRenderer(renderer);
 170 sdl_create_renderer_fail:
 171     SDL_DestroyWindow(window);
 172 sdl_create_window_fail:
 173     SDL_Quit();
 174 sdl_init_fail:
 175     return exit_code;
 176 }