src/game/level.c

   1 #include <SDL2/SDL.h>
   2 #include <assert.h>
   3
   4 #include "color.h"
   5 #include "game/camera.h"
   6 #include "game/level.h"
   7 #include "game/level/background.h"
   8 #include "game/level/boxes.h"
   9 #include "game/level/goals.h"
  10 #include "game/level/lava.h"
  11 #include "game/level/physical_world.h"
  12 #include "game/level/platforms.h"
  13 #include "game/level/player.h"
  14 #include "system/error.h"
  15 #include "system/lt.h"
  16 #include "system/lt/lt_adapters.h"
  17
  18 struct level_t
  19 {
  20     lt_t *lt;
  21
  22     physical_world_t *physical_world;
  23     player_t *player;
  24     platforms_t *platforms;
  25     goals_t *goals;
  26     lava_t *lava;
  27     color_t background_color;
  28     platforms_t *back_platforms;
  29     background_t *background;
  30     boxes_t *boxes;
  31 };
  32
  33 level_t *create_level_from_file(const char *file_name)
  34 {
  35     assert(file_name);
  36
  37     lt_t *const lt = create_lt();
  38     if (lt == NULL) {
  39         return NULL;
  40     }
  41
  42     level_t *const level = PUSH_LT(lt, malloc(sizeof(level_t)), free);
  43     if (level == NULL) {
  44         throw_error(ERROR_TYPE_LIBC);
  45         RETURN_LT(lt, NULL);
  46     }
  47
  48     FILE *level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose_lt);
  49     if (level_file == NULL) {
  50         throw_error(ERROR_TYPE_LIBC);
  51         RETURN_LT(lt, NULL);
  52     }
  53
  54     char color[7];
  55     if (fscanf(level_file, "%6s", color) == EOF) {
  56         throw_error(ERROR_TYPE_LIBC);
  57         RETURN_LT(lt, NULL);
  58     }
  59     level->background_color = color_from_hexstr(color);
  60
  61     level->player = PUSH_LT(lt, create_player_from_stream(level_file), destroy_player);
  62     if (level->player == NULL) {
  63         RETURN_LT(lt, NULL);
  64     }
  65
  66     level->platforms = PUSH_LT(lt, create_platforms_from_stream(level_file), destroy_platforms);
  67     if (level->platforms == NULL) {
  68         RETURN_LT(lt, NULL);
  69     }
  70
  71     level->goals = PUSH_LT(lt, create_goals_from_stream(level_file), destroy_goals);
  72     if (level->goals == NULL) {
  73         RETURN_LT(lt, NULL);
  74     }
  75
  76     level->lava = PUSH_LT(lt, create_lava_from_stream(level_file), destroy_lava);
  77     if (level->lava == NULL) {
  78         RETURN_LT(lt, NULL);
  79     }
  80
  81     level->back_platforms = PUSH_LT(lt, create_platforms_from_stream(level_file), destroy_platforms);
  82     if (level->back_platforms == NULL) {
  83         RETURN_LT(lt, NULL);
  84     }
  85
  86     level->boxes = PUSH_LT(lt, create_boxes_from_stream(level_file), destroy_boxes);
  87     if (level->boxes == NULL) {
  88         RETURN_LT(lt, NULL);
  89     }
  90
  91     level->background = PUSH_LT(lt, create_background(level->background_color), destroy_background);
  92     if (level->background == NULL) {
  93         RETURN_LT(lt, NULL);
  94     }
  95
  96     level->physical_world = PUSH_LT(lt, create_physical_world(), destroy_physical_world);
  97     if (level->physical_world == NULL) {
  98         RETURN_LT(lt, NULL);
  99     }
 100     if (physical_world_add_solid(
 101             level->physical_world,
 102             player_as_solid(level->player)) < 0) { RETURN_LT(lt, NULL); }
 103     if (boxes_add_to_physical_world(
 104             level->boxes,
 105             level->physical_world) < 0) { RETURN_LT(lt, NULL); }
 106
 107     level->lt = lt;
 108
 109     fclose(RELEASE_LT(lt, level_file));
 110
 111     return level;
 112 }
 113
 114 void destroy_level(level_t *level)
 115 {
 116     assert(level);
 117     RETURN_LT0(level->lt);
 118 }
 119
 120 int level_render(const level_t *level, camera_t *camera)
 121 {
 122     assert(level);
 123
 124     player_focus_camera(level->player, camera);
 125
 126     if (camera_clear_background(camera, level->background_color) < 0) {
 127         return -1;
 128     }
 129
 130     if (background_render(level->background, camera) < 0) {
 131         return -1;
 132     }
 133
 134     if (platforms_render(level->back_platforms, camera) < 0) {
 135         return -1;
 136     }
 137
 138     if (player_render(level->player, camera) < 0) {
 139         return -1;
 140     }
 141
 142     if (boxes_render(level->boxes, camera) < 0) {
 143         return -1;
 144     }
 145
 146     if (lava_render(level->lava, camera) < 0) {
 147         return -1;
 148     }
 149
 150     if (platforms_render(level->platforms, camera) < 0) {
 151         return -1;
 152     }
 153
 154     if (goals_render(level->goals, camera) < 0) {
 155         return -1;
 156     }
 157
 158     return 0;
 159 }
 160
 161 int level_update(level_t *level, float delta_time)
 162 {
 163     assert(level);
 164     assert(delta_time > 0);
 165
 166     physical_world_apply_gravity(level->physical_world);
 167
 168     boxes_update(level->boxes, delta_time);
 169     player_update(level->player, delta_time);
 170
 171     physical_world_collide_solids(level->physical_world, level->platforms);
 172
 173     player_hide_goals(level->player, level->goals);
 174     player_die_from_lava(level->player, level->lava);
 175
 176     goals_update(level->goals, delta_time);
 177     lava_update(level->lava, delta_time);
 178
 179     return 0;
 180 }
 181
 182 int level_event(level_t *level, const SDL_Event *event)
 183 {
 184     assert(level);
 185     assert(event);
 186
 187     switch (event->type) {
 188     case SDL_KEYDOWN:
 189         switch (event->key.keysym.sym) {
 190         case SDLK_SPACE:
 191             player_jump(level->player);
 192             break;
 193         }
 194         break;
 195
 196     case SDL_JOYBUTTONDOWN:
 197         if (event->jbutton.button == 1) {
 198             player_jump(level->player);
 199         }
 200         break;
 201     }
 202
 203     return 0;
 204 }
 205
 206 int level_input(level_t *level,
 207                 const Uint8 *const keyboard_state,
 208                 SDL_Joystick *the_stick_of_joy)
 209 {
 210     assert(level);
 211     assert(keyboard_state);
 212     (void) the_stick_of_joy;
 213
 214     if (keyboard_state[SDL_SCANCODE_A]) {
 215         player_move_left(level->player);
 216     } else if (keyboard_state[SDL_SCANCODE_D]) {
 217         player_move_right(level->player);
 218     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 219         player_move_left(level->player);
 220     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 221         player_move_right(level->player);
 222     } else {
 223         player_stop(level->player);
 224     }
 225
 226     return 0;
 227 }
 228
 229 int level_reload_preserve_player(level_t *level, const char *file_name)
 230 {
 231     lt_t * const lt = create_lt();
 232     if (lt == NULL) {
 233         return -1;
 234     }
 235
 236     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 237
 238
 239
 240     FILE * const level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose_lt);
 241     if (level_file == NULL) {
 242         throw_error(ERROR_TYPE_LIBC);
 243         RETURN_LT(lt, -1);
 244     }
 245
 246     char color[7];
 247     if (fscanf(level_file, "%6s", color) == EOF) {
 248         throw_error(ERROR_TYPE_LIBC);
 249         RETURN_LT(lt, -1);
 250     }
 251     level->background_color = color_from_hexstr(color);
 252
 253     player_t * const skipped_player = create_player_from_stream(level_file);
 254     if (skipped_player == NULL) {
 255         RETURN_LT(lt, -1);
 256     }
 257     destroy_player(skipped_player);
 258
 259     platforms_t * const platforms = create_platforms_from_stream(level_file);
 260     if (platforms == NULL) {
 261         RETURN_LT(lt, -1);
 262     }
 263     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 264
 265     goals_t * const goals = create_goals_from_stream(level_file);
 266     if (goals == NULL) {
 267         RETURN_LT(lt, -1);
 268     }
 269     level->goals = RESET_LT(level->lt, level->goals, goals);
 270
 271     lava_t * const lava = create_lava_from_stream(level_file);
 272     if (lava == NULL) {
 273         RETURN_LT(lt, -1);
 274     }
 275     level->lava = RESET_LT(level->lt, level->lava, lava);
 276
 277     platforms_t * const back_platforms = create_platforms_from_stream(level_file);
 278     if (back_platforms == NULL) {
 279         RETURN_LT(lt, -1);
 280     }
 281     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 282
 283     boxes_t * const boxes = create_boxes_from_stream(level_file);
 284     if (level->boxes == NULL) {
 285         RETURN_LT(lt, -1);
 286     }
 287     level->boxes = RESET_LT(level->lt, level->boxes, boxes);
 288
 289     physical_world_clean(level->physical_world);
 290     if (physical_world_add_solid(
 291             level->physical_world,
 292             player_as_solid(level->player)) < 0) { RETURN_LT(lt, -1); }
 293     if (boxes_add_to_physical_world(
 294             level->boxes,
 295             level->physical_world) < 0) { RETURN_LT(lt, -1); }
 296
 297     RETURN_LT(lt, 0);
 298 }
 299
 300 int level_sound(level_t *level, sound_samples_t *sound_samples)
 301 {
 302     if (goals_sound(level->goals, sound_samples) < 0) {
 303         return -1;
 304     }
 305
 306     if (player_sound(level->player, sound_samples) < 0) {
 307         return -1;
 308     }
 309
 310     return 0;
 311 }
 312
 313 void level_toggle_debug_mode(level_t *level)
 314 {
 315     background_toggle_debug_mode(level->background);
 316 }
 317
 318 int level_enter_camera_event(level_t *level,
 319                              const camera_t *camera)
 320 {
 321     goals_cue(level->goals, camera);
 322     goals_checkpoint(level->goals, level->player);
 323     return 0;
 324 }