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, level->rigid_bodies),
 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
 155     level->flying_mode = false;
 156     level->flying_camera_position = vec(0.0f, 0.0f);
 157     level->flying_camera_scale = 1.0f;
 158
 159     level->lt = lt;
 160
 161     destroy_line_stream(RELEASE_LT(lt, level_stream));
 162
 163     return level;
 164 }
 165
 166 void destroy_level(Level *level)
 167 {
 168     trace_assert(level);
 169     RETURN_LT0(level->lt);
 170 }
 171
 172 int level_render(const Level *level, Camera *camera)
 173 {
 174     trace_assert(level);
 175
 176     if (background_render(level->background, camera) < 0) {
 177         return -1;
 178     }
 179
 180     if (platforms_render(level->back_platforms, camera) < 0) {
 181         return -1;
 182     }
 183
 184     if (player_render(level->player, camera) < 0) {
 185         return -1;
 186     }
 187
 188     if (boxes_render(level->boxes, camera) < 0) {
 189         return -1;
 190     }
 191
 192     if (lava_render(level->lava, camera) < 0) {
 193         return -1;
 194     }
 195
 196     if (platforms_render(level->platforms, camera) < 0) {
 197         return -1;
 198     }
 199
 200     if (goals_render(level->goals, camera) < 0) {
 201         return -1;
 202     }
 203
 204     if (labels_render(level->labels, camera) < 0) {
 205         return -1;
 206     }
 207
 208     if (regions_render(level->regions, camera) < 0) {
 209         return -1;
 210     }
 211
 212     return 0;
 213 }
 214
 215 int level_update(Level *level, float delta_time)
 216 {
 217     trace_assert(level);
 218     trace_assert(delta_time > 0);
 219
 220     physical_world_apply_gravity(level->physical_world);
 221     boxes_float_in_lava(level->boxes, level->lava);
 222     rigid_bodies_apply_omniforce(level->rigid_bodies, vec(0.0f, LEVEL_GRAVITY));
 223
 224     boxes_update(level->boxes, delta_time);
 225     player_update(level->player, delta_time);
 226
 227     rigid_bodies_collide(level->rigid_bodies, level->platforms);
 228     physical_world_collide_solids(level->physical_world, level->platforms);
 229
 230     player_hide_goals(level->player, level->goals);
 231     player_die_from_lava(level->player, level->lava);
 232     regions_player_enter(level->regions, level->player);
 233     regions_player_leave(level->regions, level->player);
 234
 235     goals_update(level->goals, delta_time);
 236     lava_update(level->lava, delta_time);
 237     labels_update(level->labels, delta_time);
 238
 239     return 0;
 240 }
 241
 242 int level_event(Level *level, const SDL_Event *event)
 243 {
 244     trace_assert(level);
 245     trace_assert(event);
 246
 247     switch (event->type) {
 248     case SDL_KEYDOWN:
 249         switch (event->key.keysym.sym) {
 250         case SDLK_SPACE:
 251             player_jump(level->player);
 252             break;
 253         }
 254         break;
 255
 256     case SDL_JOYBUTTONDOWN:
 257         if (event->jbutton.button == 1) {
 258             player_jump(level->player);
 259         }
 260         break;
 261
 262     case SDL_MOUSEMOTION:
 263         if (level->flying_mode) {
 264             vec_add(&level->flying_camera_position,
 265                     vec((float) event->motion.xrel, (float) event->motion.yrel));
 266         }
 267         break;
 268
 269     case SDL_MOUSEWHEEL:
 270         if (level->flying_mode) {
 271             // TODO(#679): zooming in flying mode is not smooth enough
 272             if (event->wheel.y > 0) {
 273                 level->flying_camera_scale += 0.1f;
 274             } else if (event->wheel.y < 0) {
 275                 level->flying_camera_scale = fmaxf(0.1f, level->flying_camera_scale - 0.1f);
 276             }
 277         }
 278         break;
 279     }
 280
 281     return 0;
 282 }
 283
 284 int level_input(Level *level,
 285                 const Uint8 *const keyboard_state,
 286                 SDL_Joystick *the_stick_of_joy)
 287 {
 288     trace_assert(level);
 289     trace_assert(keyboard_state);
 290     (void) the_stick_of_joy;
 291
 292     if (keyboard_state[SDL_SCANCODE_A]) {
 293         player_move_left(level->player);
 294     } else if (keyboard_state[SDL_SCANCODE_D]) {
 295         player_move_right(level->player);
 296     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 297         player_move_left(level->player);
 298     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 299         player_move_right(level->player);
 300     } else {
 301         player_stop(level->player);
 302     }
 303
 304     return 0;
 305 }
 306
 307 int level_reload_preserve_player(Level *level, const char *file_name, Broadcast *broadcast)
 308 {
 309     Lt * const lt = create_lt();
 310     if (lt == NULL) {
 311         return -1;
 312     }
 313
 314     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 315
 316     LineStream * const level_stream = PUSH_LT(
 317         lt,
 318         create_line_stream(
 319             file_name,
 320             "r",
 321             LEVEL_LINE_MAX_LENGTH),
 322         destroy_line_stream);
 323     if (level_stream == NULL) {
 324         RETURN_LT(lt, -1);
 325     }
 326
 327     Background * const background = create_background_from_line_stream(level_stream);
 328     if (background == NULL) {
 329         RETURN_LT(lt, -1);
 330     }
 331     level->background = RESET_LT(level->lt, level->background, background);
 332
 333     Player * const skipped_player = create_player_from_line_stream(level_stream, level->rigid_bodies, broadcast);
 334     if (skipped_player == NULL) {
 335         RETURN_LT(lt, -1);
 336     }
 337     destroy_player(skipped_player);
 338
 339     Platforms * const platforms = create_platforms_from_line_stream(level_stream);
 340     if (platforms == NULL) {
 341         RETURN_LT(lt, -1);
 342     }
 343     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 344
 345     Goals * const goals = create_goals_from_line_stream(level_stream);
 346     if (goals == NULL) {
 347         RETURN_LT(lt, -1);
 348     }
 349     level->goals = RESET_LT(level->lt, level->goals, goals);
 350
 351     Lava * const lava = create_lava_from_line_stream(level_stream);
 352     if (lava == NULL) {
 353         RETURN_LT(lt, -1);
 354     }
 355     level->lava = RESET_LT(level->lt, level->lava, lava);
 356
 357     Platforms * const back_platforms = create_platforms_from_line_stream(level_stream);
 358     if (back_platforms == NULL) {
 359         RETURN_LT(lt, -1);
 360     }
 361     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 362
 363     Boxes * const boxes = create_boxes_from_line_stream(level_stream, level->rigid_bodies);
 364     if (boxes == NULL) {
 365         RETURN_LT(lt, -1);
 366     }
 367     level->boxes = RESET_LT(level->lt, level->boxes, boxes);
 368
 369     Labels * const labels = create_labels_from_line_stream(level_stream);
 370     if (labels == NULL) {
 371         RETURN_LT(lt, -1);
 372     }
 373     level->labels = RESET_LT(level->lt, level->labels, labels);
 374
 375     Regions * const regions = create_regions_from_line_stream(level_stream, broadcast);
 376     if (regions == NULL) {
 377         RETURN_LT(lt, -1);
 378     }
 379     level->regions = RESET_LT(level->lt, level->regions, regions);
 380
 381     physical_world_clean(level->physical_world);
 382
 383     RETURN_LT(lt, 0);
 384 }
 385
 386 int level_sound(Level *level, Sound_samples *sound_samples)
 387 {
 388     if (goals_sound(level->goals, sound_samples) < 0) {
 389         return -1;
 390     }
 391
 392     if (player_sound(level->player, sound_samples) < 0) {
 393         return -1;
 394     }
 395
 396     return 0;
 397 }
 398
 399 void level_toggle_debug_mode(Level *level)
 400 {
 401     background_toggle_debug_mode(level->background);
 402 }
 403
 404 int level_enter_camera_event(Level *level, Camera *camera)
 405 {
 406     if (!level->flying_mode) {
 407         player_focus_camera(level->player, camera);
 408         camera_scale(camera, 1.0f);
 409     } else {
 410         camera_center_at(camera, level->flying_camera_position);
 411         camera_scale(camera, level->flying_camera_scale);
 412     }
 413
 414     goals_cue(level->goals, camera);
 415     goals_checkpoint(level->goals, level->player);
 416     labels_enter_camera_event(level->labels, camera);
 417     return 0;
 418 }
 419
 420 struct EvalResult level_send(Level *level, Gc *gc, struct Scope *scope, struct Expr path)
 421 {
 422     trace_assert(level);
 423     trace_assert(gc);
 424     trace_assert(scope);
 425
 426     const char *target = NULL;
 427     struct Expr rest = void_expr();
 428     struct EvalResult res = match_list(gc, "q*", path, &target, &rest);
 429     if (res.is_error) {
 430         return res;
 431     }
 432
 433     if (strcmp(target, "goal") == 0) {
 434         return goals_send(level->goals, gc, scope, rest);
 435     } else if (strcmp(target, "label") == 0) {
 436         return labels_send(level->labels, gc, scope, rest);
 437     } else if (strcmp(target, "box") == 0) {
 438         return boxes_send(level->boxes, gc, scope, rest);
 439     } else if (strcmp(target, "body-push") == 0) {
 440         long int id = 0, x = 0, y = 0;
 441         res = match_list(gc, "ddd", rest, &id, &x, &y);
 442         if (res.is_error) {
 443             return res;
 444         }
 445
 446         rigid_bodies_apply_force(level->rigid_bodies, (size_t) id, vec((float) x, (float) y));
 447
 448         return eval_success(NIL(gc));
 449     } else if (strcmp(target, "body-add") == 0) {
 450         long int x = 0, y = 0, w = 0, h = 0;
 451         const char *color = 0;
 452         res = match_list(gc, "dddds", rest, &x, &y, &w, &h, &color);
 453         if (res.is_error) {
 454             return res;
 455         }
 456
 457         return eval_success(
 458             NUMBER(
 459                 gc,
 460                 (long int) rigid_bodies_add(
 461                     level->rigid_bodies,
 462                     rect((float)x, (float)y, (float)w, (float)h),
 463                     hexstr(color))));
 464     } else if (strcmp(target, "fly") == 0) {
 465         level->flying_mode = !level->flying_mode;
 466         SDL_SetRelativeMouseMode(level->flying_mode);
 467         return eval_success(NIL(gc));
 468     }
 469
 470     return unknown_target(gc, "level", target);
 471 }