src/game/level.c

   1 #include <SDL2/SDL.h>
   2 #include "system/stacktrace.h"
   3
   4 #include "broadcast.h"
   5 #include "color.h"
   6 #include "ebisp/builtins.h"
   7 #include "ebisp/interpreter.h"
   8 #include "game/camera.h"
   9 #include "game/level.h"
  10 #include "game/level/background.h"
  11 #include "game/level/boxes.h"
  12 #include "game/level/goals.h"
  13 #include "game/level/labels.h"
  14 #include "game/level/lava.h"
  15 #include "game/level/physical_world.h"
  16 #include "game/level/platforms.h"
  17 #include "game/level/player.h"
  18 #include "game/level/regions.h"
  19 #include "game/level/rigid_bodies.h"
  20 #include "system/line_stream.h"
  21 #include "system/lt.h"
  22 #include "system/lt/lt_adapters.h"
  23 #include "system/nth_alloc.h"
  24
  25 #define LEVEL_LINE_MAX_LENGTH 512
  26 #define LEVEL_GRAVITY 1500.0f
  27
  28 struct Level
  29 {
  30     Lt *lt;
  31
  32     Background *background;
  33     Player *player;
  34     Platforms *platforms;
  35     Goals *goals;
  36     Lava *lava;
  37     Platforms *back_platforms;
  38     Boxes *boxes;
  39     Labels *labels;
  40     Regions *regions;
  41     Physical_world *physical_world;
  42     RigidBodies *rigid_bodies;
  43 };
  44
  45 Level *create_level_from_file(const char *file_name, Broadcast *broadcast)
  46 {
  47     trace_assert(file_name);
  48
  49     Lt *const lt = create_lt();
  50     if (lt == NULL) {
  51         return NULL;
  52     }
  53
  54     Level *const level = PUSH_LT(lt, nth_alloc(sizeof(Level)), free);
  55     if (level == NULL) {
  56         RETURN_LT(lt, NULL);
  57     }
  58
  59     LineStream *level_stream = PUSH_LT(
  60         lt,
  61         create_line_stream(
  62             file_name,
  63             "r",
  64             LEVEL_LINE_MAX_LENGTH),
  65         destroy_line_stream);
  66     if (level_stream == NULL) {
  67         RETURN_LT(lt, NULL);
  68     }
  69     level->background = PUSH_LT(
  70         lt,
  71         create_background_from_line_stream(level_stream),
  72         destroy_background);
  73     if (level->background == NULL) {
  74         RETURN_LT(lt, NULL);
  75     }
  76
  77     level->player = PUSH_LT(
  78         lt,
  79         create_player_from_line_stream(level_stream, broadcast),
  80         destroy_player);
  81     if (level->player == NULL) {
  82         RETURN_LT(lt, NULL);
  83     }
  84
  85     level->platforms = PUSH_LT(
  86         lt,
  87         create_platforms_from_line_stream(level_stream),
  88         destroy_platforms);
  89     if (level->platforms == NULL) {
  90         RETURN_LT(lt, NULL);
  91     }
  92
  93     level->goals = PUSH_LT(
  94         lt,
  95         create_goals_from_line_stream(level_stream),
  96         destroy_goals);
  97     if (level->goals == NULL) {
  98         RETURN_LT(lt, NULL);
  99     }
 100
 101     level->lava = PUSH_LT(
 102         lt,
 103         create_lava_from_line_stream(level_stream),
 104         destroy_lava);
 105     if (level->lava == NULL) {
 106         RETURN_LT(lt, NULL);
 107     }
 108
 109     level->back_platforms = PUSH_LT(
 110         lt,
 111         create_platforms_from_line_stream(level_stream),
 112         destroy_platforms);
 113     if (level->back_platforms == NULL) {
 114         RETURN_LT(lt, NULL);
 115     }
 116
 117     level->boxes = PUSH_LT(
 118         lt,
 119         create_boxes_from_line_stream(level_stream),
 120         destroy_boxes);
 121     if (level->boxes == NULL) {
 122         RETURN_LT(lt, NULL);
 123     }
 124
 125     level->labels = PUSH_LT(
 126         lt,
 127         create_labels_from_line_stream(level_stream),
 128         destroy_labels);
 129     if (level->labels == NULL) {
 130         RETURN_LT(lt, NULL);
 131     }
 132
 133     level->regions = PUSH_LT(
 134         lt,
 135         create_regions_from_line_stream(level_stream, broadcast),
 136         destroy_regions);
 137     if (level->regions == NULL) {
 138         RETURN_LT(lt, NULL);
 139     }
 140
 141     level->physical_world = PUSH_LT(lt, create_physical_world(), destroy_physical_world);
 142     if (level->physical_world == NULL) {
 143         RETURN_LT(lt, NULL);
 144     }
 145     if (physical_world_add_solid(
 146             level->physical_world,
 147             player_as_solid(level->player)) < 0) { RETURN_LT(lt, NULL); }
 148     if (boxes_add_to_physical_world(
 149             level->boxes,
 150             level->physical_world) < 0) { RETURN_LT(lt, NULL); }
 151
 152     level->rigid_bodies = PUSH_LT(lt, create_rigid_bodies(1024), destroy_rigid_bodies);
 153     if (level->rigid_bodies == NULL) {
 154         RETURN_LT(lt, NULL);
 155     }
 156     rigid_bodies_add(
 157         level->rigid_bodies,
 158         rect(0.0, -1000.0, 100.0, 100.0),
 159         rgba(1.0f, 0.0f, 0.0f, 1.0f));
 160
 161     rigid_bodies_add(
 162         level->rigid_bodies,
 163         rect(150.0, -1000.0, 100.0, 100.0),
 164         rgba(0.0f, 1.0f, 0.0f, 1.0f));
 165
 166
 167     level->lt = lt;
 168
 169     destroy_line_stream(RELEASE_LT(lt, level_stream));
 170
 171     return level;
 172 }
 173
 174 void destroy_level(Level *level)
 175 {
 176     trace_assert(level);
 177     RETURN_LT0(level->lt);
 178 }
 179
 180 int level_render(const Level *level, Camera *camera)
 181 {
 182     trace_assert(level);
 183
 184     if (background_render(level->background, camera) < 0) {
 185         return -1;
 186     }
 187
 188     if (platforms_render(level->back_platforms, camera) < 0) {
 189         return -1;
 190     }
 191
 192     if (player_render(level->player, camera) < 0) {
 193         return -1;
 194     }
 195
 196     if (boxes_render(level->boxes, camera) < 0) {
 197         return -1;
 198     }
 199
 200     if (lava_render(level->lava, camera) < 0) {
 201         return -1;
 202     }
 203
 204     if (platforms_render(level->platforms, camera) < 0) {
 205         return -1;
 206     }
 207
 208     if (goals_render(level->goals, camera) < 0) {
 209         return -1;
 210     }
 211
 212     if (labels_render(level->labels, camera) < 0) {
 213         return -1;
 214     }
 215
 216     if (regions_render(level->regions, camera) < 0) {
 217         return -1;
 218     }
 219
 220     if (rigid_bodies_render(level->rigid_bodies, camera) < 0) {
 221         return -1;
 222     }
 223
 224     return 0;
 225 }
 226
 227 int level_update(Level *level, float delta_time)
 228 {
 229     trace_assert(level);
 230     trace_assert(delta_time > 0);
 231
 232     physical_world_apply_gravity(level->physical_world);
 233     boxes_float_in_lava(level->boxes, level->lava);
 234     rigid_bodies_apply_omniforce(level->rigid_bodies, vec(0.0f, LEVEL_GRAVITY));
 235
 236     rigid_bodies_update(level->rigid_bodies, delta_time);
 237     boxes_update(level->boxes, delta_time);
 238     player_update(level->player, delta_time);
 239
 240     rigid_bodies_collide_with_itself(level->rigid_bodies);
 241     rigid_bodies_collide_with_platforms(level->rigid_bodies, level->platforms);
 242     physical_world_collide_solids(level->physical_world, level->platforms);
 243
 244     player_hide_goals(level->player, level->goals);
 245     player_die_from_lava(level->player, level->lava);
 246     regions_player_enter(level->regions, level->player);
 247     regions_player_leave(level->regions, level->player);
 248
 249     goals_update(level->goals, delta_time);
 250     lava_update(level->lava, delta_time);
 251     labels_update(level->labels, delta_time);
 252
 253     return 0;
 254 }
 255
 256 int level_event(Level *level, const SDL_Event *event)
 257 {
 258     trace_assert(level);
 259     trace_assert(event);
 260
 261     switch (event->type) {
 262     case SDL_KEYDOWN:
 263         switch (event->key.keysym.sym) {
 264         case SDLK_SPACE:
 265             player_jump(level->player);
 266             break;
 267         }
 268         break;
 269
 270     case SDL_JOYBUTTONDOWN:
 271         if (event->jbutton.button == 1) {
 272             player_jump(level->player);
 273         }
 274         break;
 275     }
 276
 277     return 0;
 278 }
 279
 280 int level_input(Level *level,
 281                 const Uint8 *const keyboard_state,
 282                 SDL_Joystick *the_stick_of_joy)
 283 {
 284     trace_assert(level);
 285     trace_assert(keyboard_state);
 286     (void) the_stick_of_joy;
 287
 288     if (keyboard_state[SDL_SCANCODE_A]) {
 289         player_move_left(level->player);
 290     } else if (keyboard_state[SDL_SCANCODE_D]) {
 291         player_move_right(level->player);
 292     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 293         player_move_left(level->player);
 294     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 295         player_move_right(level->player);
 296     } else {
 297         player_stop(level->player);
 298     }
 299
 300     return 0;
 301 }
 302
 303 int level_reload_preserve_player(Level *level, const char *file_name, Broadcast *broadcast)
 304 {
 305     Lt * const lt = create_lt();
 306     if (lt == NULL) {
 307         return -1;
 308     }
 309
 310     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 311
 312     LineStream * const level_stream = PUSH_LT(
 313         lt,
 314         create_line_stream(
 315             file_name,
 316             "r",
 317             LEVEL_LINE_MAX_LENGTH),
 318         destroy_line_stream);
 319     if (level_stream == NULL) {
 320         RETURN_LT(lt, -1);
 321     }
 322
 323     Background * const background = create_background_from_line_stream(level_stream);
 324     if (background == NULL) {
 325         RETURN_LT(lt, -1);
 326     }
 327     level->background = RESET_LT(level->lt, level->background, background);
 328
 329     Player * const skipped_player = create_player_from_line_stream(level_stream, broadcast);
 330     if (skipped_player == NULL) {
 331         RETURN_LT(lt, -1);
 332     }
 333     destroy_player(skipped_player);
 334
 335     Platforms * const platforms = create_platforms_from_line_stream(level_stream);
 336     if (platforms == NULL) {
 337         RETURN_LT(lt, -1);
 338     }
 339     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 340
 341     Goals * const goals = create_goals_from_line_stream(level_stream);
 342     if (goals == NULL) {
 343         RETURN_LT(lt, -1);
 344     }
 345     level->goals = RESET_LT(level->lt, level->goals, goals);
 346
 347     Lava * const lava = create_lava_from_line_stream(level_stream);
 348     if (lava == NULL) {
 349         RETURN_LT(lt, -1);
 350     }
 351     level->lava = RESET_LT(level->lt, level->lava, lava);
 352
 353     Platforms * const back_platforms = create_platforms_from_line_stream(level_stream);
 354     if (back_platforms == NULL) {
 355         RETURN_LT(lt, -1);
 356     }
 357     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 358
 359     Boxes * const boxes = create_boxes_from_line_stream(level_stream);
 360     if (boxes == NULL) {
 361         RETURN_LT(lt, -1);
 362     }
 363     level->boxes = RESET_LT(level->lt, level->boxes, boxes);
 364
 365     Labels * const labels = create_labels_from_line_stream(level_stream);
 366     if (labels == NULL) {
 367         RETURN_LT(lt, -1);
 368     }
 369     level->labels = RESET_LT(level->lt, level->labels, labels);
 370
 371     Regions * const regions = create_regions_from_line_stream(level_stream, broadcast);
 372     if (regions == NULL) {
 373         RETURN_LT(lt, -1);
 374     }
 375     level->regions = RESET_LT(level->lt, level->regions, regions);
 376
 377     physical_world_clean(level->physical_world);
 378     if (physical_world_add_solid(
 379             level->physical_world,
 380             player_as_solid(level->player)) < 0) { RETURN_LT(lt, -1); }
 381     if (boxes_add_to_physical_world(
 382             level->boxes,
 383             level->physical_world) < 0) { RETURN_LT(lt, -1); }
 384
 385     RETURN_LT(lt, 0);
 386 }
 387
 388 int level_sound(Level *level, Sound_samples *sound_samples)
 389 {
 390     if (goals_sound(level->goals, sound_samples) < 0) {
 391         return -1;
 392     }
 393
 394     if (player_sound(level->player, sound_samples) < 0) {
 395         return -1;
 396     }
 397
 398     return 0;
 399 }
 400
 401 void level_toggle_debug_mode(Level *level)
 402 {
 403     background_toggle_debug_mode(level->background);
 404 }
 405
 406 int level_enter_camera_event(Level *level, Camera *camera)
 407 {
 408     player_focus_camera(level->player, camera);
 409     goals_cue(level->goals, camera);
 410     goals_checkpoint(level->goals, level->player);
 411     labels_enter_camera_event(level->labels, camera);
 412     return 0;
 413 }
 414
 415 Rigid_rect *level_rigid_rect(Level *level,
 416                              const char *rigid_rect_id)
 417 {
 418     trace_assert(level);
 419     trace_assert(rigid_rect_id);
 420
 421     Rigid_rect *rigid_rect = player_rigid_rect(level->player,
 422                                                rigid_rect_id);
 423     if (rigid_rect != NULL) {
 424         return rigid_rect;
 425     }
 426
 427     rigid_rect = boxes_rigid_rect(level->boxes, rigid_rect_id);
 428     if (rigid_rect != NULL) {
 429         return rigid_rect;
 430     }
 431
 432     return NULL;
 433 }
 434
 435 struct EvalResult level_send(Level *level, Gc *gc, struct Scope *scope, struct Expr path)
 436 {
 437     trace_assert(level);
 438     trace_assert(gc);
 439     trace_assert(scope);
 440
 441     const char *target = NULL;
 442     struct Expr rest = void_expr();
 443     struct EvalResult res = match_list(gc, "q*", path, &target, &rest);
 444     if (res.is_error) {
 445         return res;
 446     }
 447
 448     if (strcmp(target, "goal") == 0) {
 449         return goals_send(level->goals, gc, scope, rest);
 450     } else if (strcmp(target, "label") == 0) {
 451         return labels_send(level->labels, gc, scope, rest);
 452     } else if (strcmp(target, "box") == 0) {
 453         return boxes_send(level->boxes, gc, scope, rest);
 454     } else if (strcmp(target, "body") == 0) {
 455         long int id = 0, x = 0, y = 0;
 456         res = match_list(gc, "ddd", rest, &id, &x, &y);
 457         if (res.is_error) {
 458             return res;
 459         }
 460
 461         rigid_bodies_apply_force(level->rigid_bodies, (size_t) id, vec((float) x, (float) y));
 462         return eval_success(NIL(gc));
 463     }
 464
 465     return unknown_target(gc, "level", target);
 466 }