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