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