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(level->rigid_bodies, level->platforms);
 241     physical_world_collide_solids(level->physical_world, level->platforms);
 242
 243     player_hide_goals(level->player, level->goals);
 244     player_die_from_lava(level->player, level->lava);
 245     regions_player_enter(level->regions, level->player);
 246     regions_player_leave(level->regions, level->player);
 247
 248     goals_update(level->goals, delta_time);
 249     lava_update(level->lava, delta_time);
 250     labels_update(level->labels, delta_time);
 251
 252     return 0;
 253 }
 254
 255 int level_event(Level *level, const SDL_Event *event)
 256 {
 257     trace_assert(level);
 258     trace_assert(event);
 259
 260     switch (event->type) {
 261     case SDL_KEYDOWN:
 262         switch (event->key.keysym.sym) {
 263         case SDLK_SPACE:
 264             player_jump(level->player);
 265             break;
 266         }
 267         break;
 268
 269     case SDL_JOYBUTTONDOWN:
 270         if (event->jbutton.button == 1) {
 271             player_jump(level->player);
 272         }
 273         break;
 274     }
 275
 276     return 0;
 277 }
 278
 279 int level_input(Level *level,
 280                 const Uint8 *const keyboard_state,
 281                 SDL_Joystick *the_stick_of_joy)
 282 {
 283     trace_assert(level);
 284     trace_assert(keyboard_state);
 285     (void) the_stick_of_joy;
 286
 287     if (keyboard_state[SDL_SCANCODE_A]) {
 288         player_move_left(level->player);
 289     } else if (keyboard_state[SDL_SCANCODE_D]) {
 290         player_move_right(level->player);
 291     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 292         player_move_left(level->player);
 293     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 294         player_move_right(level->player);
 295     } else {
 296         player_stop(level->player);
 297     }
 298
 299     return 0;
 300 }
 301
 302 int level_reload_preserve_player(Level *level, const char *file_name, Broadcast *broadcast)
 303 {
 304     Lt * const lt = create_lt();
 305     if (lt == NULL) {
 306         return -1;
 307     }
 308
 309     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 310
 311     LineStream * const level_stream = PUSH_LT(
 312         lt,
 313         create_line_stream(
 314             file_name,
 315             "r",
 316             LEVEL_LINE_MAX_LENGTH),
 317         destroy_line_stream);
 318     if (level_stream == NULL) {
 319         RETURN_LT(lt, -1);
 320     }
 321
 322     Background * const background = create_background_from_line_stream(level_stream);
 323     if (background == NULL) {
 324         RETURN_LT(lt, -1);
 325     }
 326     level->background = RESET_LT(level->lt, level->background, background);
 327
 328     Player * const skipped_player = create_player_from_line_stream(level_stream, broadcast);
 329     if (skipped_player == NULL) {
 330         RETURN_LT(lt, -1);
 331     }
 332     destroy_player(skipped_player);
 333
 334     Platforms * const platforms = create_platforms_from_line_stream(level_stream);
 335     if (platforms == NULL) {
 336         RETURN_LT(lt, -1);
 337     }
 338     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 339
 340     Goals * const goals = create_goals_from_line_stream(level_stream);
 341     if (goals == NULL) {
 342         RETURN_LT(lt, -1);
 343     }
 344     level->goals = RESET_LT(level->lt, level->goals, goals);
 345
 346     Lava * const lava = create_lava_from_line_stream(level_stream);
 347     if (lava == NULL) {
 348         RETURN_LT(lt, -1);
 349     }
 350     level->lava = RESET_LT(level->lt, level->lava, lava);
 351
 352     Platforms * const back_platforms = create_platforms_from_line_stream(level_stream);
 353     if (back_platforms == NULL) {
 354         RETURN_LT(lt, -1);
 355     }
 356     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 357
 358     Boxes * const boxes = create_boxes_from_line_stream(level_stream);
 359     if (boxes == NULL) {
 360         RETURN_LT(lt, -1);
 361     }
 362     level->boxes = RESET_LT(level->lt, level->boxes, boxes);
 363
 364     Labels * const labels = create_labels_from_line_stream(level_stream);
 365     if (labels == NULL) {
 366         RETURN_LT(lt, -1);
 367     }
 368     level->labels = RESET_LT(level->lt, level->labels, labels);
 369
 370     Regions * const regions = create_regions_from_line_stream(level_stream, broadcast);
 371     if (regions == NULL) {
 372         RETURN_LT(lt, -1);
 373     }
 374     level->regions = RESET_LT(level->lt, level->regions, regions);
 375
 376     physical_world_clean(level->physical_world);
 377     if (physical_world_add_solid(
 378             level->physical_world,
 379             player_as_solid(level->player)) < 0) { RETURN_LT(lt, -1); }
 380     if (boxes_add_to_physical_world(
 381             level->boxes,
 382             level->physical_world) < 0) { RETURN_LT(lt, -1); }
 383
 384     RETURN_LT(lt, 0);
 385 }
 386
 387 int level_sound(Level *level, Sound_samples *sound_samples)
 388 {
 389     if (goals_sound(level->goals, sound_samples) < 0) {
 390         return -1;
 391     }
 392
 393     if (player_sound(level->player, sound_samples) < 0) {
 394         return -1;
 395     }
 396
 397     return 0;
 398 }
 399
 400 void level_toggle_debug_mode(Level *level)
 401 {
 402     background_toggle_debug_mode(level->background);
 403 }
 404
 405 int level_enter_camera_event(Level *level, Camera *camera)
 406 {
 407     player_focus_camera(level->player, camera);
 408     goals_cue(level->goals, camera);
 409     goals_checkpoint(level->goals, level->player);
 410     labels_enter_camera_event(level->labels, camera);
 411     return 0;
 412 }
 413
 414 Rigid_rect *level_rigid_rect(Level *level,
 415                              const char *rigid_rect_id)
 416 {
 417     trace_assert(level);
 418     trace_assert(rigid_rect_id);
 419
 420     Rigid_rect *rigid_rect = player_rigid_rect(level->player,
 421                                                rigid_rect_id);
 422     if (rigid_rect != NULL) {
 423         return rigid_rect;
 424     }
 425
 426     rigid_rect = boxes_rigid_rect(level->boxes, rigid_rect_id);
 427     if (rigid_rect != NULL) {
 428         return rigid_rect;
 429     }
 430
 431     return NULL;
 432 }
 433
 434 struct EvalResult level_send(Level *level, Gc *gc, struct Scope *scope, struct Expr path)
 435 {
 436     trace_assert(level);
 437     trace_assert(gc);
 438     trace_assert(scope);
 439
 440     const char *target = NULL;
 441     struct Expr rest = void_expr();
 442     struct EvalResult res = match_list(gc, "q*", path, &target, &rest);
 443     if (res.is_error) {
 444         return res;
 445     }
 446
 447     if (strcmp(target, "goal") == 0) {
 448         return goals_send(level->goals, gc, scope, rest);
 449     } else if (strcmp(target, "label") == 0) {
 450         return labels_send(level->labels, gc, scope, rest);
 451     } else if (strcmp(target, "box") == 0) {
 452         return boxes_send(level->boxes, gc, scope, rest);
 453     } else if (strcmp(target, "body") == 0) {
 454         long int id = 0, x = 0, y = 0;
 455         res = match_list(gc, "ddd", rest, &id, &x, &y);
 456         if (res.is_error) {
 457             return res;
 458         }
 459
 460         rigid_bodies_apply_force(level->rigid_bodies, (size_t) id, vec((float) x, (float) y));
 461         return eval_success(NIL(gc));
 462     }
 463
 464     return unknown_target(gc, "level", target);
 465 }