src/game/level.c

   1 #include <SDL2/SDL.h>
   2 #include <assert.h>
   3
   4 #include "game/camera.h"
   5 #include "game/level.h"
   6 #include "game/level/background.h"
   7 #include "game/level/boxes.h"
   8 #include "game/level/goals.h"
   9 #include "game/level/lava.h"
  10 #include "game/level/platforms.h"
  11 #include "game/level/player.h"
  12 #include "system/error.h"
  13 #include "system/lt.h"
  14
  15 /* TODO(#118): Level doesn't play the Nothing and Something sounds when the goal get into view */
  16
  17 struct level_t
  18 {
  19     lt_t *lt;
  20     player_t *player;
  21     platforms_t *platforms;
  22     goals_t *goals;
  23     lava_t *lava;
  24     color_t background_color;
  25     platforms_t *back_platforms;
  26     background_t *background;
  27     boxes_t *boxes;
  28 };
  29
  30 level_t *create_level_from_file(const char *file_name)
  31 {
  32     assert(file_name);
  33
  34     lt_t *const lt = create_lt();
  35     if (lt == NULL) {
  36         return NULL;
  37     }
  38
  39     level_t *const level = PUSH_LT(lt, malloc(sizeof(level_t)), free);
  40     if (level == NULL) {
  41         throw_error(ERROR_TYPE_LIBC);
  42         RETURN_LT(lt, NULL);
  43     }
  44
  45     FILE *level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose);
  46     if (level_file == NULL) {
  47         throw_error(ERROR_TYPE_LIBC);
  48         RETURN_LT(lt, NULL);
  49     }
  50
  51     char color[7];
  52     if (fscanf(level_file, "%6s", color) == EOF) {
  53         throw_error(ERROR_TYPE_LIBC);
  54         RETURN_LT(lt, NULL);
  55     }
  56     level->background_color = color_from_hexstr(color);
  57
  58     level->player = PUSH_LT(lt, create_player_from_stream(level_file), destroy_player);
  59     if (level->player == NULL) {
  60         RETURN_LT(lt, NULL);
  61     }
  62
  63     level->platforms = PUSH_LT(lt, create_platforms_from_stream(level_file), destroy_platforms);
  64     if (level->platforms == NULL) {
  65         RETURN_LT(lt, NULL);
  66     }
  67
  68     level->goals = PUSH_LT(lt, create_goals_from_stream(level_file), destroy_goals);
  69     if (level->goals == NULL) {
  70         RETURN_LT(lt, NULL);
  71     }
  72
  73     level->lava = PUSH_LT(lt, create_lava_from_stream(level_file), destroy_lava);
  74     if (level->lava == NULL) {
  75         RETURN_LT(lt, NULL);
  76     }
  77
  78     level->back_platforms = PUSH_LT(lt, create_platforms_from_stream(level_file), destroy_platforms);
  79     if (level->back_platforms == NULL) {
  80         RETURN_LT(lt, NULL);
  81     }
  82
  83     level->boxes = PUSH_LT(lt, create_boxes_from_stream(level_file), destroy_boxes);
  84     if (level->boxes == NULL) {
  85         RETURN_LT(lt, NULL);
  86     }
  87
  88     level->background = PUSH_LT(lt, create_background(level->background_color), destroy_background);
  89     if (level->background == NULL) {
  90         RETURN_LT(lt, NULL);
  91     }
  92
  93     level->lt = lt;
  94
  95     fclose(RELEASE_LT(lt, level_file));
  96
  97     return level;
  98 }
  99
 100 void destroy_level(level_t *level)
 101 {
 102     assert(level);
 103     RETURN_LT0(level->lt);
 104 }
 105
 106 int level_render(const level_t *level, camera_t *camera)
 107 {
 108     assert(level);
 109
 110     player_focus_camera(level->player, camera);
 111
 112     if (camera_clear_background(camera, level->background_color) < 0) {
 113         return -1;
 114     }
 115
 116     if (background_render(level->background, camera) < 0) {
 117         return -1;
 118     }
 119
 120     if (platforms_render(level->back_platforms, camera) < 0) {
 121         return -1;
 122     }
 123
 124     if (player_render(level->player, camera) < 0) {
 125         return -1;
 126     }
 127
 128     if (boxes_render(level->boxes, camera) < 0) {
 129         return -1;
 130     }
 131
 132     if (lava_render(level->lava, camera) < 0) {
 133         return -1;
 134     }
 135
 136     if (platforms_render(level->platforms, camera) < 0) {
 137         return -1;
 138     }
 139
 140     if (goals_render(level->goals, camera) < 0) {
 141         return -1;
 142     }
 143
 144     /* TODO(#157): goals_cue is not supposed to be invoked in level_render
 145      *
 146      * But I simply couldn't find a better place for it.
 147      */
 148     goals_cue(level->goals, camera);
 149
 150     return 0;
 151 }
 152
 153 int level_update(level_t *level, float delta_time)
 154 {
 155     assert(level);
 156     assert(delta_time > 0);
 157
 158     player_update(level->player, delta_time);
 159     player_collide_with_platforms(level->player, level->platforms);
 160
 161     boxes_update(level->boxes, delta_time);
 162     boxes_collide_with_player(level->boxes, level->player);
 163     boxes_collide_with_platforms(level->boxes, level->platforms);
 164
 165     player_hide_goals(level->player, level->goals);
 166     player_die_from_lava(level->player, level->lava);
 167
 168     goals_update(level->goals, delta_time);
 169     goals_checkpoint(level->goals, level->player);
 170     lava_update(level->lava, delta_time);
 171
 172     return 0;
 173 }
 174
 175 int level_event(level_t *level, const SDL_Event *event)
 176 {
 177     assert(level);
 178     assert(event);
 179
 180     switch (event->type) {
 181     case SDL_KEYDOWN:
 182         switch (event->key.keysym.sym) {
 183         case SDLK_SPACE:
 184             player_jump(level->player);
 185             break;
 186         }
 187         break;
 188
 189     case SDL_JOYBUTTONDOWN:
 190         if (event->jbutton.button == 1) {
 191             player_jump(level->player);
 192         }
 193         break;
 194     }
 195
 196     return 0;
 197 }
 198
 199 int level_input(level_t *level,
 200                 const Uint8 *const keyboard_state,
 201                 SDL_Joystick *the_stick_of_joy)
 202 {
 203     assert(level);
 204     assert(keyboard_state);
 205     (void) the_stick_of_joy;
 206
 207     if (keyboard_state[SDL_SCANCODE_A]) {
 208         player_move_left(level->player);
 209     } else if (keyboard_state[SDL_SCANCODE_D]) {
 210         player_move_right(level->player);
 211     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 212         player_move_left(level->player);
 213     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 214         player_move_right(level->player);
 215     } else {
 216         player_stop(level->player);
 217     }
 218
 219     return 0;
 220 }
 221
 222 int level_reload_preserve_player(level_t *level, const char *file_name)
 223 {
 224     lt_t * const lt = create_lt();
 225     if (lt == NULL) {
 226         return -1;
 227     }
 228
 229     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 230
 231     FILE * const level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose);
 232     if (level_file == NULL) {
 233         throw_error(ERROR_TYPE_LIBC);
 234         RETURN_LT(lt, -1);
 235     }
 236
 237     char color[7];
 238     if (fscanf(level_file, "%6s", color) == EOF) {
 239         throw_error(ERROR_TYPE_LIBC);
 240         RETURN_LT(lt, -1);
 241     }
 242     level->background_color = color_from_hexstr(color);
 243
 244     player_t * const skipped_player = create_player_from_stream(level_file);
 245     if (skipped_player == NULL) {
 246         RETURN_LT(lt, -1);
 247     }
 248     destroy_player(skipped_player);
 249
 250     platforms_t * const platforms = create_platforms_from_stream(level_file);
 251     if (platforms == NULL) {
 252         RETURN_LT(lt, -1);
 253     }
 254     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 255
 256     goals_t * const goals = create_goals_from_stream(level_file);
 257     if (goals == NULL) {
 258         RETURN_LT(lt, -1);
 259     }
 260     level->goals = RESET_LT(level->lt, level->goals, goals);
 261
 262     lava_t * const lava = create_lava_from_stream(level_file);
 263     if (lava == NULL) {
 264         RETURN_LT(lt, -1);
 265     }
 266     level->lava = RESET_LT(level->lt, level->lava, lava);
 267
 268     platforms_t * const back_platforms = create_platforms_from_stream(level_file);
 269     if (back_platforms == NULL) {
 270         RETURN_LT(lt, -1);
 271     }
 272     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 273
 274     boxes_t * const boxes = create_boxes_from_stream(level_file);
 275     if (level->boxes == NULL) {
 276         RETURN_LT(lt, -1);
 277     }
 278     level->boxes = RESET_LT(level->lt, level->boxes, boxes);
 279
 280     RETURN_LT(lt, 0);
 281 }
 282
 283 int level_sound(level_t *level, sound_samples_t *sound_samples)
 284 {
 285     if (goals_sound(level->goals, sound_samples) < 0) {
 286         return -1;
 287     }
 288
 289     if (player_sound(level->player, sound_samples) < 0) {
 290         return -1;
 291     }
 292
 293     return 0;
 294 }