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