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     int exit_code = 0;
  16
  17     if (SDL_Init(SDL_INIT_VIDEO) < 0) {
  18         fprintf(stderr, "Could not initialize SDL: %s", SDL_GetError());
  19         exit_code = -1;
  20         goto sdl_init_fail;
  21     }
  22
  23     SDL_Window *window = SDL_CreateWindow("Nothing",
  24                                           100, 100,
  25                                           SCREEN_WIDTH, SCREEN_HEIGHT,
  26                                           SDL_WINDOW_SHOWN);
  27     if (window == NULL) {
  28         fprintf(stderr, "Could not create SDL window: %s", SDL_GetError());
  29         exit_code = -1;
  30         goto sdl_create_window_fail;
  31     }
  32
  33     SDL_Renderer *renderer = SDL_CreateRenderer(window, -1,
  34                                                 SDL_RENDERER_ACCELERATED |
  35                                                 SDL_RENDERER_PRESENTVSYNC);
  36     if (renderer == NULL) {
  37         fprintf(stderr, "Could not create SDL renderer: %s", SDL_GetError());
  38         exit_code = -1;
  39         goto sdl_create_renderer_fail;
  40     }
  41
  42     struct player_t *player = create_player(100.0f, 0.0f);
  43     if (player == NULL) {
  44         perror("Could not create player");
  45         exit_code = -1;
  46         goto create_player_fail;
  47     }
  48
  49     const struct rect_t platforms_rects[] = {
  50         { .x = 0.0f,
  51           .y = GROUND_LEVEL + 50.0f,
  52           .w = 50.0f,
  53           .h = 50.0f },
  54         { .x = 150.0f,
  55           .y = GROUND_LEVEL + 50.0f,
  56           .w = SCREEN_WIDTH - 150.0f,
  57           .h = 50.0f },
  58         { .x = 0.0f,
  59           .y = GROUND_LEVEL + 100.0f,
  60           .w = 50.0f,
  61           .h = 50.0f },
  62         { .x = 150.0f,
  63           .y = GROUND_LEVEL + 100.0f,
  64           .w = 50.0f,
  65           .h = 50.0f },
  66         { .x = 0.0f,
  67           .y = GROUND_LEVEL + 150.0f,
  68           .w = 50.0f,
  69           .h = 50.0f },
  70         { .x = 150.0f,
  71           .y = GROUND_LEVEL + 150.0f,
  72           .w = 50.0f,
  73           .h = 50.0f }
  74     };
  75     struct platforms_t *platforms = create_platforms(
  76         platforms_rects,
  77         sizeof(platforms_rects) / sizeof(struct rect_t));
  78     if (platforms == NULL) {
  79         perror("Could not create platforms");
  80         exit_code = -1;
  81         goto create_platforms_fail;
  82     }
  83
  84     int quit = 0;
  85
  86     const Uint8 *keyboard_state = SDL_GetKeyboardState(NULL);
  87     const Uint32 delay_ms = (Uint32) roundf(1000.0f / GAME_FPS);
  88     SDL_Event e;
  89     while (!quit) {
  90         while (SDL_PollEvent(&e)) {
  91             switch (e.type) {
  92             case SDL_QUIT:
  93                 quit = 1;
  94                 break;
  95
  96             case SDL_KEYDOWN:
  97                 switch (e.key.keysym.sym) {
  98                 case SDLK_SPACE:
  99                     player_jump(player);
 100                     break;
 101                 }
 102             }
 103
 104         }
 105
 106         if (keyboard_state[SDL_SCANCODE_A]) {
 107             player_move_left(player);
 108         } else if (keyboard_state[SDL_SCANCODE_D]) {
 109             player_move_right(player);
 110         } else {
 111             player_stop(player);
 112         }
 113
 114         update_player(player, platforms, delay_ms);
 115
 116         SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
 117         SDL_RenderClear(renderer);
 118         render_player(player, renderer);
 119         render_platforms(platforms, renderer);
 120         SDL_RenderPresent(renderer);
 121         SDL_Delay(delay_ms);
 122     }
 123
 124     destroy_platforms(platforms);
 125 create_platforms_fail:
 126     destroy_player(player);
 127 create_player_fail:
 128     SDL_DestroyRenderer(renderer);
 129 sdl_create_renderer_fail:
 130     SDL_DestroyWindow(window);
 131 sdl_create_window_fail:
 132     SDL_Quit();
 133 sdl_init_fail:
 134     return exit_code;
 135 }