src/game/level.c

   1 #include <SDL2/SDL.h>
   2 #include <assert.h>
   3
   4 #include "game/camera.h"
   5 #include "game/level.h"
   6 #include "game/level/background.h"
   7 #include "game/level/boxes.h"
   8 #include "game/level/goals.h"
   9 #include "game/level/lava.h"
  10 #include "game/level/physical_world.h"
  11 #include "game/level/platforms.h"
  12 #include "game/level/player.h"
  13 #include "system/error.h"
  14 #include "system/lt.h"
  15 #include "system/lt/lt_adapters.h"
  16
  17 struct level_t
  18 {
  19     lt_t *lt;
  20
  21     physical_world_t *physical_world;
  22     player_t *player;
  23     platforms_t *platforms;
  24     goals_t *goals;
  25     lava_t *lava;
  26     color_t background_color;
  27     platforms_t *back_platforms;
  28     background_t *background;
  29     boxes_t *boxes;
  30 };
  31
  32 level_t *create_level_from_file(const char *file_name)
  33 {
  34     assert(file_name);
  35
  36     lt_t *const lt = create_lt();
  37     if (lt == NULL) {
  38         return NULL;
  39     }
  40
  41     level_t *const level = PUSH_LT(lt, malloc(sizeof(level_t)), free);
  42     if (level == NULL) {
  43         throw_error(ERROR_TYPE_LIBC);
  44         RETURN_LT(lt, NULL);
  45     }
  46
  47     FILE *level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose_lt);
  48     if (level_file == NULL) {
  49         throw_error(ERROR_TYPE_LIBC);
  50         RETURN_LT(lt, NULL);
  51     }
  52
  53     char color[7];
  54     if (fscanf(level_file, "%6s", color) == EOF) {
  55         throw_error(ERROR_TYPE_LIBC);
  56         RETURN_LT(lt, NULL);
  57     }
  58     level->background_color = color_from_hexstr(color);
  59
  60     level->player = PUSH_LT(lt, create_player_from_stream(level_file), destroy_player);
  61     if (level->player == NULL) {
  62         RETURN_LT(lt, NULL);
  63     }
  64
  65     level->platforms = PUSH_LT(lt, create_platforms_from_stream(level_file), destroy_platforms);
  66     if (level->platforms == NULL) {
  67         RETURN_LT(lt, NULL);
  68     }
  69
  70     level->goals = PUSH_LT(lt, create_goals_from_stream(level_file), destroy_goals);
  71     if (level->goals == NULL) {
  72         RETURN_LT(lt, NULL);
  73     }
  74
  75     level->lava = PUSH_LT(lt, create_lava_from_stream(level_file), destroy_lava);
  76     if (level->lava == NULL) {
  77         RETURN_LT(lt, NULL);
  78     }
  79
  80     level->back_platforms = PUSH_LT(lt, create_platforms_from_stream(level_file), destroy_platforms);
  81     if (level->back_platforms == NULL) {
  82         RETURN_LT(lt, NULL);
  83     }
  84
  85     level->boxes = PUSH_LT(lt, create_boxes_from_stream(level_file), destroy_boxes);
  86     if (level->boxes == NULL) {
  87         RETURN_LT(lt, NULL);
  88     }
  89
  90     level->background = PUSH_LT(lt, create_background(level->background_color), destroy_background);
  91     if (level->background == NULL) {
  92         RETURN_LT(lt, NULL);
  93     }
  94
  95     level->physical_world = PUSH_LT(lt, create_physical_world(), destroy_physical_world);
  96     if (level->physical_world == NULL) {
  97         RETURN_LT(lt, NULL);
  98     }
  99     if (physical_world_add_solid(
 100             level->physical_world,
 101             player_as_solid(level->player)) < 0) { RETURN_LT(lt, NULL); }
 102     if (boxes_add_to_physical_world(
 103             level->boxes,
 104             level->physical_world) < 0) { RETURN_LT(lt, NULL); }
 105
 106     level->lt = lt;
 107
 108     fclose(RELEASE_LT(lt, level_file));
 109
 110     return level;
 111 }
 112
 113 void destroy_level(level_t *level)
 114 {
 115     assert(level);
 116     RETURN_LT0(level->lt);
 117 }
 118
 119 int level_render(const level_t *level, camera_t *camera)
 120 {
 121     assert(level);
 122
 123     player_focus_camera(level->player, camera);
 124
 125     if (camera_clear_background(camera, level->background_color) < 0) {
 126         return -1;
 127     }
 128
 129     if (background_render(level->background, camera) < 0) {
 130         return -1;
 131     }
 132
 133     if (platforms_render(level->back_platforms, camera) < 0) {
 134         return -1;
 135     }
 136
 137     if (player_render(level->player, camera) < 0) {
 138         return -1;
 139     }
 140
 141     if (boxes_render(level->boxes, camera) < 0) {
 142         return -1;
 143     }
 144
 145     if (lava_render(level->lava, camera) < 0) {
 146         return -1;
 147     }
 148
 149     if (platforms_render(level->platforms, camera) < 0) {
 150         return -1;
 151     }
 152
 153     if (goals_render(level->goals, camera) < 0) {
 154         return -1;
 155     }
 156
 157     /* TODO(#157): goals_cue is not supposed to be invoked in level_render
 158      *
 159      * But I simply couldn't find a better place for it.
 160      */
 161     goals_cue(level->goals, camera);
 162
 163     return 0;
 164 }
 165
 166 int level_update(level_t *level, float delta_time)
 167 {
 168     assert(level);
 169     assert(delta_time > 0);
 170
 171     physical_world_apply_gravity(level->physical_world);
 172
 173     boxes_update(level->boxes, delta_time);
 174     player_update(level->player, delta_time);
 175
 176     physical_world_collide_solids(level->physical_world, level->platforms);
 177
 178     player_hide_goals(level->player, level->goals);
 179     player_die_from_lava(level->player, level->lava);
 180
 181     goals_update(level->goals, delta_time);
 182     goals_checkpoint(level->goals, level->player);
 183     lava_update(level->lava, delta_time);
 184
 185     return 0;
 186 }
 187
 188 int level_event(level_t *level, const SDL_Event *event)
 189 {
 190     assert(level);
 191     assert(event);
 192
 193     switch (event->type) {
 194     case SDL_KEYDOWN:
 195         switch (event->key.keysym.sym) {
 196         case SDLK_SPACE:
 197             player_jump(level->player);
 198             break;
 199         }
 200         break;
 201
 202     case SDL_JOYBUTTONDOWN:
 203         if (event->jbutton.button == 1) {
 204             player_jump(level->player);
 205         }
 206         break;
 207     }
 208
 209     return 0;
 210 }
 211
 212 int level_input(level_t *level,
 213                 const Uint8 *const keyboard_state,
 214                 SDL_Joystick *the_stick_of_joy)
 215 {
 216     assert(level);
 217     assert(keyboard_state);
 218     (void) the_stick_of_joy;
 219
 220     if (keyboard_state[SDL_SCANCODE_A]) {
 221         player_move_left(level->player);
 222     } else if (keyboard_state[SDL_SCANCODE_D]) {
 223         player_move_right(level->player);
 224     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 225         player_move_left(level->player);
 226     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 227         player_move_right(level->player);
 228     } else {
 229         player_stop(level->player);
 230     }
 231
 232     return 0;
 233 }
 234
 235 int level_reload_preserve_player(level_t *level, const char *file_name)
 236 {
 237     lt_t * const lt = create_lt();
 238     if (lt == NULL) {
 239         return -1;
 240     }
 241
 242     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 243
 244
 245
 246     FILE * const level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose_lt);
 247     if (level_file == NULL) {
 248         throw_error(ERROR_TYPE_LIBC);
 249         RETURN_LT(lt, -1);
 250     }
 251
 252     char color[7];
 253     if (fscanf(level_file, "%6s", color) == EOF) {
 254         throw_error(ERROR_TYPE_LIBC);
 255         RETURN_LT(lt, -1);
 256     }
 257     level->background_color = color_from_hexstr(color);
 258
 259     player_t * const skipped_player = create_player_from_stream(level_file);
 260     if (skipped_player == NULL) {
 261         RETURN_LT(lt, -1);
 262     }
 263     destroy_player(skipped_player);
 264
 265     platforms_t * const platforms = create_platforms_from_stream(level_file);
 266     if (platforms == NULL) {
 267         RETURN_LT(lt, -1);
 268     }
 269     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 270
 271     goals_t * const goals = create_goals_from_stream(level_file);
 272     if (goals == NULL) {
 273         RETURN_LT(lt, -1);
 274     }
 275     level->goals = RESET_LT(level->lt, level->goals, goals);
 276
 277     lava_t * const lava = create_lava_from_stream(level_file);
 278     if (lava == NULL) {
 279         RETURN_LT(lt, -1);
 280     }
 281     level->lava = RESET_LT(level->lt, level->lava, lava);
 282
 283     platforms_t * const back_platforms = create_platforms_from_stream(level_file);
 284     if (back_platforms == NULL) {
 285         RETURN_LT(lt, -1);
 286     }
 287     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 288
 289     boxes_t * const boxes = create_boxes_from_stream(level_file);
 290     if (level->boxes == NULL) {
 291         RETURN_LT(lt, -1);
 292     }
 293     level->boxes = RESET_LT(level->lt, level->boxes, boxes);
 294
 295     physical_world_clean(level->physical_world);
 296     if (physical_world_add_solid(
 297             level->physical_world,
 298             player_as_solid(level->player)) < 0) { RETURN_LT(lt, -1); }
 299     if (boxes_add_to_physical_world(
 300             level->boxes,
 301             level->physical_world) < 0) { RETURN_LT(lt, -1); }
 302
 303     RETURN_LT(lt, 0);
 304 }
 305
 306 int level_sound(level_t *level, sound_samples_t *sound_samples)
 307 {
 308     if (goals_sound(level->goals, sound_samples) < 0) {
 309         return -1;
 310     }
 311
 312     if (player_sound(level->player, sound_samples) < 0) {
 313         return -1;
 314     }
 315
 316     return 0;
 317 }
 318
 319 void level_toggle_debug_mode(level_t *level)
 320 {
 321     background_toggle_debug_mode(level->background);
 322 }