src/game/level.c

   1 #include <SDL2/SDL.h>
   2 #include <assert.h>
   3
   4 #include "game/level.h"
   5 #include "game/level/background.h"
   6 #include "game/level/camera.h"
   7 #include "game/level/goals.h"
   8 #include "game/level/lava.h"
   9 #include "game/level/platforms.h"
  10 #include "game/level/player.h"
  11 #include "system/error.h"
  12 #include "system/lt.h"
  13
  14 /* TODO(#118): Level doesn't play the Nothing and Something sounds when the goal get into view */
  15
  16 struct level_t
  17 {
  18     lt_t *lt;
  19     player_t *player;
  20     platforms_t *platforms;
  21     goals_t *goals;
  22     lava_t *lava;
  23     color_t background_color;
  24     platforms_t *back_platforms;
  25     background_t *background;
  26 };
  27
  28 level_t *create_level_from_file(const char *file_name)
  29 {
  30     assert(file_name);
  31
  32     lt_t *const lt = create_lt();
  33     if (lt == NULL) {
  34         return NULL;
  35     }
  36
  37     level_t *const level = PUSH_LT(lt, malloc(sizeof(level_t)), free);
  38     if (level == NULL) {
  39         throw_error(ERROR_TYPE_LIBC);
  40         RETURN_LT(lt, NULL);
  41     }
  42
  43     FILE *level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose);
  44     if (level_file == NULL) {
  45         throw_error(ERROR_TYPE_LIBC);
  46         RETURN_LT(lt, NULL);
  47     }
  48
  49     char color[7];
  50     if (fscanf(level_file, "%6s", color) == EOF) {
  51         throw_error(ERROR_TYPE_LIBC);
  52         RETURN_LT(lt, NULL);
  53     }
  54     level->background_color = color_from_hexstr(color);
  55
  56     level->player = PUSH_LT(lt, create_player_from_stream(level_file), destroy_player);
  57     if (level->player == NULL) {
  58         RETURN_LT(lt, NULL);
  59     }
  60
  61     level->platforms = PUSH_LT(lt, create_platforms_from_stream(level_file), destroy_platforms);
  62     if (level->platforms == NULL) {
  63         RETURN_LT(lt, NULL);
  64     }
  65
  66     level->goals = PUSH_LT(lt, create_goals_from_stream(level_file), destroy_goals);
  67     if (level->goals == NULL) {
  68         RETURN_LT(lt, NULL);
  69     }
  70
  71     level->lava = PUSH_LT(lt, create_lava_from_stream(level_file), destroy_lava);
  72     if (level->lava == NULL) {
  73         RETURN_LT(lt, NULL);
  74     }
  75
  76     level->back_platforms = PUSH_LT(lt, create_platforms_from_stream(level_file), destroy_platforms);
  77     if (level->back_platforms == NULL) {
  78         RETURN_LT(lt, NULL);
  79     }
  80
  81     level->background = PUSH_LT(lt, create_background(level->background_color), destroy_background);
  82     if (level->background == NULL) {
  83         RETURN_LT(lt, NULL);
  84     }
  85
  86     level->lt = lt;
  87
  88     fclose(RELEASE_LT(lt, level_file));
  89
  90     return level;
  91 }
  92
  93 void destroy_level(level_t *level)
  94 {
  95     assert(level);
  96     RETURN_LT0(level->lt);
  97 }
  98
  99 int level_render(const level_t *level, camera_t *camera)
 100 {
 101     assert(level);
 102
 103     if (camera_clear_background(camera, level->background_color) < 0) {
 104         return -1;
 105     }
 106
 107     const rect_t view_port = camera_view_port(camera);
 108
 109     background_move_to(level->background, vec(view_port.x + view_port.w * 0.5f,
 110                                               view_port.y + view_port.h * 0.5f));
 111
 112     if (background_render(level->background, camera) < 0) {
 113         return -1;
 114     }
 115
 116     if (platforms_render(level->back_platforms, camera) < 0) {
 117         return -1;
 118     }
 119
 120     if (player_render(level->player, camera) < 0) {
 121         return -1;
 122     }
 123
 124     if (lava_render(level->lava, camera) < 0) {
 125         return -1;
 126     }
 127
 128     if (platforms_render(level->platforms, camera) < 0) {
 129         return -1;
 130     }
 131
 132     if (goals_render(level->goals, camera) < 0) {
 133         return -1;
 134     }
 135
 136     /* TODO: player_focus_camera is not supposed to be invoked in level_render */
 137     player_focus_camera(level->player, camera);
 138
 139     /* TODO(#157): goals_cue is not supposed to be invoked in level_render
 140      *
 141      * But I simply couldn't find a better place for it.
 142      */
 143     goals_cue(level->goals, camera);
 144
 145     return 0;
 146 }
 147
 148 int level_update(level_t *level, float delta_time)
 149 {
 150     assert(level);
 151     assert(delta_time > 0);
 152
 153     player_update(level->player, level->platforms, delta_time);
 154
 155     player_hide_goals(level->player, level->goals);
 156     player_die_from_lava(level->player, level->lava);
 157
 158     goals_update(level->goals, delta_time);
 159     goals_checkpoint(level->goals, level->player);
 160     lava_update(level->lava, delta_time);
 161
 162     return 0;
 163 }
 164
 165 int level_event(level_t *level, const SDL_Event *event)
 166 {
 167     assert(level);
 168     assert(event);
 169
 170     switch (event->type) {
 171     case SDL_KEYDOWN:
 172         switch (event->key.keysym.sym) {
 173         case SDLK_SPACE:
 174             player_jump(level->player);
 175             break;
 176         }
 177         break;
 178
 179     case SDL_JOYBUTTONDOWN:
 180         if (event->jbutton.button == 1) {
 181             player_jump(level->player);
 182         }
 183         break;
 184     }
 185
 186     return 0;
 187 }
 188
 189 int level_input(level_t *level,
 190                 const Uint8 *const keyboard_state,
 191                 SDL_Joystick *the_stick_of_joy)
 192 {
 193     assert(level);
 194     assert(keyboard_state);
 195     (void) the_stick_of_joy;
 196
 197     if (keyboard_state[SDL_SCANCODE_A]) {
 198         player_move_left(level->player);
 199     } else if (keyboard_state[SDL_SCANCODE_D]) {
 200         player_move_right(level->player);
 201     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 202         player_move_left(level->player);
 203     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 204         player_move_right(level->player);
 205     } else {
 206         player_stop(level->player);
 207     }
 208
 209     return 0;
 210 }
 211
 212 int level_reload_preserve_player(level_t *level, const char *file_name)
 213 {
 214     lt_t * const lt = create_lt();
 215     if (lt == NULL) {
 216         return -1;
 217     }
 218
 219     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 220
 221     FILE * const level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose);
 222     if (level_file == NULL) {
 223         throw_error(ERROR_TYPE_LIBC);
 224         RETURN_LT(lt, -1);
 225     }
 226
 227     char color[7];
 228     if (fscanf(level_file, "%6s", color) == EOF) {
 229         throw_error(ERROR_TYPE_LIBC);
 230         RETURN_LT(lt, -1);
 231     }
 232     level->background_color = color_from_hexstr(color);
 233
 234     player_t * const skipped_player = create_player_from_stream(level_file);
 235     if (skipped_player == NULL) {
 236         RETURN_LT(lt, -1);
 237     }
 238     destroy_player(skipped_player);
 239
 240     platforms_t * const platforms = create_platforms_from_stream(level_file);
 241     if (platforms == NULL) {
 242         RETURN_LT(lt, -1);
 243     }
 244     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 245
 246     goals_t * const goals = create_goals_from_stream(level_file);
 247     if (goals == NULL) {
 248         RETURN_LT(lt, -1);
 249     }
 250     level->goals = RESET_LT(level->lt, level->goals, goals);
 251
 252     lava_t * const lava = create_lava_from_stream(level_file);
 253     if (lava == NULL) {
 254         RETURN_LT(lt, -1);
 255     }
 256     level->lava = RESET_LT(level->lt, level->lava, lava);
 257
 258     platforms_t * const back_platforms = create_platforms_from_stream(level_file);
 259     if (back_platforms == NULL) {
 260         RETURN_LT(lt, -1);
 261     }
 262     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 263
 264     RETURN_LT(lt, 0);
 265 }
 266
 267 int level_sound(level_t *level, sound_medium_t *sound_medium)
 268 {
 269     if (goals_sound(level->goals, sound_medium) < 0) {
 270         return -1;
 271     }
 272
 273     if (player_sound(level->player, sound_medium) < 0) {
 274         return -1;
 275     }
 276
 277     return 0;
 278 }