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/platforms.h"
  16 #include "game/level/player.h"
  17 #include "game/level/regions.h"
  18 #include "game/level/rigid_bodies.h"
  19 #include "game/level_metadata.h"
  20 #include "game/proto_rect.h"
  21 #include "system/line_stream.h"
  22 #include "system/log.h"
  23 #include "system/lt.h"
  24 #include "system/lt/lt_adapters.h"
  25 #include "system/nth_alloc.h"
  26 #include "system/str.h"
  27
  28 #define LEVEL_LINE_MAX_LENGTH 512
  29 #define LEVEL_GRAVITY 1500.0f
  30
  31 struct Level
  32 {
  33     Lt *lt;
  34
  35     const char *file_name;
  36     LevelMetadata *metadata;
  37     Background *background;
  38     RigidBodies *rigid_bodies;
  39     Player *player;
  40     Platforms *platforms;
  41     Goals *goals;
  42     Lava *lava;
  43     Platforms *back_platforms;
  44     Boxes *boxes;
  45     Labels *labels;
  46     Regions *regions;
  47
  48     bool flying_mode;
  49     Vec flying_camera_position;
  50     float flying_camera_scale;
  51     ProtoRect proto_rect;
  52 };
  53
  54 Level *create_level_from_file(const char *file_name, Broadcast *broadcast)
  55 {
  56     trace_assert(file_name);
  57
  58     Lt *const lt = create_lt();
  59     if (lt == NULL) {
  60         return NULL;
  61     }
  62
  63     Level *const level = PUSH_LT(lt, nth_alloc(sizeof(Level)), free);
  64     if (level == NULL) {
  65         RETURN_LT(lt, NULL);
  66     }
  67     level->lt = lt;
  68
  69     level->file_name = PUSH_LT(lt, string_duplicate(file_name, NULL), free);
  70     if (level->file_name == NULL) {
  71         RETURN_LT(lt, NULL);
  72     }
  73
  74     LineStream *level_stream = PUSH_LT(
  75         lt,
  76         create_line_stream(
  77             file_name,
  78             "r",
  79             LEVEL_LINE_MAX_LENGTH),
  80         destroy_line_stream);
  81     if (level_stream == NULL) {
  82         RETURN_LT(lt, NULL);
  83     }
  84
  85     level->metadata = PUSH_LT(
  86         lt,
  87         create_level_metadata_from_line_stream(level_stream),
  88         destroy_level_metadata);
  89     if (level->metadata == NULL) {
  90         RETURN_LT(lt, NULL);
  91     }
  92
  93     level->background = PUSH_LT(
  94         lt,
  95         create_background_from_line_stream(level_stream),
  96         destroy_background);
  97     if (level->background == NULL) {
  98         RETURN_LT(lt, NULL);
  99     }
 100
 101     level->rigid_bodies = PUSH_LT(lt, create_rigid_bodies(1024), destroy_rigid_bodies);
 102     if (level->rigid_bodies == NULL) {
 103         RETURN_LT(lt, NULL);
 104     }
 105
 106     level->player = PUSH_LT(
 107         lt,
 108         create_player_from_line_stream(level_stream, level->rigid_bodies, broadcast),
 109         destroy_player);
 110     if (level->player == NULL) {
 111         RETURN_LT(lt, NULL);
 112     }
 113
 114     level->platforms = PUSH_LT(
 115         lt,
 116         create_platforms_from_line_stream(level_stream),
 117         destroy_platforms);
 118     if (level->platforms == NULL) {
 119         RETURN_LT(lt, NULL);
 120     }
 121
 122     level->goals = PUSH_LT(
 123         lt,
 124         create_goals_from_line_stream(level_stream),
 125         destroy_goals);
 126     if (level->goals == NULL) {
 127         RETURN_LT(lt, NULL);
 128     }
 129
 130     level->lava = PUSH_LT(
 131         lt,
 132         create_lava_from_line_stream(level_stream),
 133         destroy_lava);
 134     if (level->lava == NULL) {
 135         RETURN_LT(lt, NULL);
 136     }
 137
 138     level->back_platforms = PUSH_LT(
 139         lt,
 140         create_platforms_from_line_stream(level_stream),
 141         destroy_platforms);
 142     if (level->back_platforms == NULL) {
 143         RETURN_LT(lt, NULL);
 144     }
 145
 146     level->boxes = PUSH_LT(
 147         lt,
 148         create_boxes_from_line_stream(level_stream, level->rigid_bodies, level->player),
 149         destroy_boxes);
 150     if (level->boxes == NULL) {
 151         RETURN_LT(lt, NULL);
 152     }
 153
 154     level->labels = PUSH_LT(
 155         lt,
 156         create_labels_from_line_stream(level_stream),
 157         destroy_labels);
 158     if (level->labels == NULL) {
 159         RETURN_LT(lt, NULL);
 160     }
 161
 162     level->regions = PUSH_LT(
 163         lt,
 164         create_regions_from_line_stream(level_stream, broadcast),
 165         destroy_regions);
 166     if (level->regions == NULL) {
 167         RETURN_LT(lt, NULL);
 168     }
 169
 170     level->flying_mode = false;
 171     level->flying_camera_position = vec(0.0f, 0.0f);
 172     level->flying_camera_scale = 1.0f;
 173
 174     memset(&level->proto_rect, 0, sizeof(ProtoRect));
 175     level->proto_rect.color = rgba(1.0f, 0.0f, 0.0f, 1.0f);
 176
 177     destroy_line_stream(RELEASE_LT(lt, level_stream));
 178
 179     return level;
 180 }
 181
 182 void destroy_level(Level *level)
 183 {
 184     trace_assert(level);
 185     RETURN_LT0(level->lt);
 186 }
 187
 188 int level_render(const Level *level, Camera *camera)
 189 {
 190     trace_assert(level);
 191
 192     if (background_render(level->background, camera) < 0) {
 193         return -1;
 194     }
 195
 196     if (platforms_render(level->back_platforms, camera) < 0) {
 197         return -1;
 198     }
 199
 200     if (player_render(level->player, camera) < 0) {
 201         return -1;
 202     }
 203
 204     if (boxes_render(level->boxes, camera) < 0) {
 205         return -1;
 206     }
 207
 208     if (lava_render(level->lava, camera) < 0) {
 209         return -1;
 210     }
 211
 212     if (platforms_render(level->platforms, camera) < 0) {
 213         return -1;
 214     }
 215
 216     if (goals_render(level->goals, camera) < 0) {
 217         return -1;
 218     }
 219
 220     if (labels_render(level->labels, camera) < 0) {
 221         return -1;
 222     }
 223
 224     if (regions_render(level->regions, camera) < 0) {
 225         return -1;
 226     }
 227
 228     if (level->flying_mode) {
 229         if (proto_rect_render(&level->proto_rect, camera) < 0) {
 230             return -1;
 231         }
 232     }
 233
 234     return 0;
 235 }
 236
 237 int level_update(Level *level, float delta_time)
 238 {
 239     trace_assert(level);
 240     trace_assert(delta_time > 0);
 241
 242     boxes_float_in_lava(level->boxes, level->lava);
 243     rigid_bodies_apply_omniforce(level->rigid_bodies, vec(0.0f, LEVEL_GRAVITY));
 244
 245     boxes_update(level->boxes, delta_time);
 246     player_update(level->player, delta_time);
 247
 248     rigid_bodies_collide(level->rigid_bodies, level->platforms);
 249
 250     player_hide_goals(level->player, level->goals);
 251     player_die_from_lava(level->player, level->lava);
 252     regions_player_enter(level->regions, level->player);
 253     regions_player_leave(level->regions, level->player);
 254
 255     goals_update(level->goals, delta_time);
 256     lava_update(level->lava, delta_time);
 257     labels_update(level->labels, delta_time);
 258
 259     if (level->flying_mode) {
 260         proto_rect_update(&level->proto_rect, delta_time);
 261     }
 262
 263     return 0;
 264 }
 265
 266 int level_event(Level *level, const SDL_Event *event, const Camera *camera)
 267 {
 268     trace_assert(level);
 269     trace_assert(event);
 270
 271     switch (event->type) {
 272     case SDL_KEYDOWN:
 273         switch (event->key.keysym.sym) {
 274         case SDLK_SPACE:
 275             player_jump(level->player);
 276             break;
 277         }
 278         break;
 279
 280     case SDL_JOYBUTTONDOWN:
 281         if (event->jbutton.button == 1) {
 282             player_jump(level->player);
 283         }
 284         break;
 285
 286     case SDL_MOUSEMOTION:
 287         if (level->flying_mode) {
 288             const float sens = 1.0f / level->flying_camera_scale * 0.25f;
 289             vec_add(&level->flying_camera_position,
 290                     vec((float) event->motion.xrel * sens, (float) event->motion.yrel * sens));
 291         }
 292         break;
 293
 294     case SDL_MOUSEWHEEL:
 295         if (level->flying_mode) {
 296             // TODO(#679): zooming in flying mode is not smooth enough
 297             if (event->wheel.y > 0) {
 298                 level->flying_camera_scale += 0.1f;
 299             } else if (event->wheel.y < 0) {
 300                 level->flying_camera_scale = fmaxf(0.1f, level->flying_camera_scale - 0.1f);
 301             }
 302         }
 303         break;
 304     }
 305
 306     if (level->flying_mode) {
 307         proto_rect_event(&level->proto_rect, event, camera);
 308     }
 309
 310     return 0;
 311 }
 312
 313 int level_input(Level *level,
 314                 const Uint8 *const keyboard_state,
 315                 SDL_Joystick *the_stick_of_joy)
 316 {
 317     trace_assert(level);
 318     trace_assert(keyboard_state);
 319     (void) the_stick_of_joy;
 320
 321     if (keyboard_state[SDL_SCANCODE_A]) {
 322         player_move_left(level->player);
 323     } else if (keyboard_state[SDL_SCANCODE_D]) {
 324         player_move_right(level->player);
 325     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 326         player_move_left(level->player);
 327     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 328         player_move_right(level->player);
 329     } else {
 330         player_stop(level->player);
 331     }
 332
 333     return 0;
 334 }
 335
 336 int level_reload_preserve_player(Level *level, Broadcast *broadcast)
 337 {
 338     Lt * const lt = create_lt();
 339     if (lt == NULL) {
 340         return -1;
 341     }
 342
 343     log_info("Soft-reloading the level from '%s'...\n", level->file_name);
 344
 345     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 346
 347     LineStream * const level_stream = PUSH_LT(
 348         lt,
 349         create_line_stream(
 350             level->file_name,
 351             "r",
 352             LEVEL_LINE_MAX_LENGTH),
 353         destroy_line_stream);
 354     if (level_stream == NULL) {
 355         RETURN_LT(lt, -1);
 356     }
 357
 358     LevelMetadata *const metadata = create_level_metadata_from_line_stream(level_stream);
 359     if (metadata == NULL) {
 360         RETURN_LT(lt, -1);
 361     }
 362     level->metadata = RESET_LT(level->lt, level->metadata, metadata);
 363
 364     Background * const background = create_background_from_line_stream(level_stream);
 365     if (background == NULL) {
 366         RETURN_LT(lt, -1);
 367     }
 368     level->background = RESET_LT(level->lt, level->background, background);
 369
 370     Player * const skipped_player = create_player_from_line_stream(level_stream, level->rigid_bodies, broadcast);
 371     if (skipped_player == NULL) {
 372         RETURN_LT(lt, -1);
 373     }
 374     destroy_player(skipped_player);
 375
 376     Platforms * const platforms = create_platforms_from_line_stream(level_stream);
 377     if (platforms == NULL) {
 378         RETURN_LT(lt, -1);
 379     }
 380     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 381
 382     Goals * const goals = create_goals_from_line_stream(level_stream);
 383     if (goals == NULL) {
 384         RETURN_LT(lt, -1);
 385     }
 386     level->goals = RESET_LT(level->lt, level->goals, goals);
 387
 388     Lava * const lava = create_lava_from_line_stream(level_stream);
 389     if (lava == NULL) {
 390         RETURN_LT(lt, -1);
 391     }
 392     level->lava = RESET_LT(level->lt, level->lava, lava);
 393
 394     Platforms * const back_platforms = create_platforms_from_line_stream(level_stream);
 395     if (back_platforms == NULL) {
 396         RETURN_LT(lt, -1);
 397     }
 398     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 399
 400     Boxes * const boxes = create_boxes_from_line_stream(level_stream, level->rigid_bodies, level->player);
 401     if (boxes == NULL) {
 402         RETURN_LT(lt, -1);
 403     }
 404     level->boxes = RESET_LT(level->lt, level->boxes, boxes);
 405
 406     Labels * const labels = create_labels_from_line_stream(level_stream);
 407     if (labels == NULL) {
 408         RETURN_LT(lt, -1);
 409     }
 410     level->labels = RESET_LT(level->lt, level->labels, labels);
 411
 412     Regions * const regions = create_regions_from_line_stream(level_stream, broadcast);
 413     if (regions == NULL) {
 414         RETURN_LT(lt, -1);
 415     }
 416     level->regions = RESET_LT(level->lt, level->regions, regions);
 417
 418     RETURN_LT(lt, 0);
 419 }
 420
 421 int level_sound(Level *level, Sound_samples *sound_samples)
 422 {
 423     if (goals_sound(level->goals, sound_samples) < 0) {
 424         return -1;
 425     }
 426
 427     if (player_sound(level->player, sound_samples) < 0) {
 428         return -1;
 429     }
 430
 431     return 0;
 432 }
 433
 434 void level_toggle_debug_mode(Level *level)
 435 {
 436     background_toggle_debug_mode(level->background);
 437 }
 438
 439 int level_enter_camera_event(Level *level, Camera *camera)
 440 {
 441     if (!level->flying_mode) {
 442         player_focus_camera(level->player, camera);
 443         camera_scale(camera, 1.0f);
 444     } else {
 445         camera_center_at(camera, level->flying_camera_position);
 446         camera_scale(camera, level->flying_camera_scale);
 447     }
 448
 449     goals_cue(level->goals, camera);
 450     goals_checkpoint(level->goals, level->player);
 451     labels_enter_camera_event(level->labels, camera);
 452     return 0;
 453 }
 454
 455 struct EvalResult level_send(Level *level, Gc *gc, struct Scope *scope, struct Expr path)
 456 {
 457     trace_assert(level);
 458     trace_assert(gc);
 459     trace_assert(scope);
 460
 461     const char *target = NULL;
 462     struct Expr rest = void_expr();
 463     struct EvalResult res = match_list(gc, "q*", path, &target, &rest);
 464     if (res.is_error) {
 465         return res;
 466     }
 467
 468     if (strcmp(target, "goal") == 0) {
 469         return goals_send(level->goals, gc, scope, rest);
 470     } else if (strcmp(target, "label") == 0) {
 471         return labels_send(level->labels, gc, scope, rest);
 472     } else if (strcmp(target, "box") == 0) {
 473         return boxes_send(level->boxes, gc, scope, rest);
 474     } else if (strcmp(target, "body-push") == 0) {
 475         long int id = 0, x = 0, y = 0;
 476         res = match_list(gc, "ddd", rest, &id, &x, &y);
 477         if (res.is_error) {
 478             return res;
 479         }
 480
 481         rigid_bodies_apply_force(level->rigid_bodies, (size_t) id, vec((float) x, (float) y));
 482
 483         return eval_success(NIL(gc));
 484     } else if (strcmp(target, "body-add") == 0) {
 485         long int x = 0, y = 0, w = 0, h = 0;
 486         const char *color = 0;
 487         res = match_list(gc, "dddds", rest, &x, &y, &w, &h, &color);
 488         if (res.is_error) {
 489             return res;
 490         }
 491
 492         return eval_success(
 493             NUMBER(
 494                 gc,
 495                 (long int) rigid_bodies_add(
 496                     level->rigid_bodies,
 497                     rect((float)x, (float)y, (float)w, (float)h),
 498                     hexstr(color))));
 499     } else if (strcmp(target, "fly") == 0) {
 500         level->flying_mode = !level->flying_mode;
 501         SDL_SetRelativeMouseMode(level->flying_mode);
 502         return eval_success(NIL(gc));
 503     }
 504
 505     return unknown_target(gc, "level", target);
 506 }