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(#202): 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_lava(level->boxes, level->lava);
 164     boxes_collide_with_solid(level->boxes, boxes_as_solid(level->boxes));
 165     boxes_collide_with_solid(level->boxes, player_as_solid(level->player));
 166
 167     player_collide_with_solid(level->player, boxes_as_solid(level->boxes));
 168
 169     boxes_collide_with_solid(level->boxes, platforms_as_solid(level->platforms));
 170     player_collide_with_solid(level->player, platforms_as_solid(level->platforms));
 171
 172     boxes_collide_with_solid(level->boxes, boxes_as_solid(level->boxes));
 173     player_collide_with_solid(level->player, boxes_as_solid(level->boxes));
 174
 175     player_hide_goals(level->player, level->goals);
 176     player_die_from_lava(level->player, level->lava);
 177
 178     goals_update(level->goals, delta_time);
 179     goals_checkpoint(level->goals, level->player);
 180     lava_update(level->lava, delta_time);
 181
 182     return 0;
 183 }
 184
 185 int level_event(level_t *level, const SDL_Event *event)
 186 {
 187     assert(level);
 188     assert(event);
 189
 190     switch (event->type) {
 191     case SDL_KEYDOWN:
 192         switch (event->key.keysym.sym) {
 193         case SDLK_SPACE:
 194             player_jump(level->player);
 195             break;
 196         }
 197         break;
 198
 199     case SDL_JOYBUTTONDOWN:
 200         if (event->jbutton.button == 1) {
 201             player_jump(level->player);
 202         }
 203         break;
 204     }
 205
 206     return 0;
 207 }
 208
 209 int level_input(level_t *level,
 210                 const Uint8 *const keyboard_state,
 211                 SDL_Joystick *the_stick_of_joy)
 212 {
 213     assert(level);
 214     assert(keyboard_state);
 215     (void) the_stick_of_joy;
 216
 217     if (keyboard_state[SDL_SCANCODE_A]) {
 218         player_move_left(level->player);
 219     } else if (keyboard_state[SDL_SCANCODE_D]) {
 220         player_move_right(level->player);
 221     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 222         player_move_left(level->player);
 223     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 224         player_move_right(level->player);
 225     } else {
 226         player_stop(level->player);
 227     }
 228
 229     return 0;
 230 }
 231
 232 int level_reload_preserve_player(level_t *level, const char *file_name)
 233 {
 234     lt_t * const lt = create_lt();
 235     if (lt == NULL) {
 236         return -1;
 237     }
 238
 239     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 240
 241     FILE * const level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose);
 242     if (level_file == NULL) {
 243         throw_error(ERROR_TYPE_LIBC);
 244         RETURN_LT(lt, -1);
 245     }
 246
 247     char color[7];
 248     if (fscanf(level_file, "%6s", color) == EOF) {
 249         throw_error(ERROR_TYPE_LIBC);
 250         RETURN_LT(lt, -1);
 251     }
 252     level->background_color = color_from_hexstr(color);
 253
 254     player_t * const skipped_player = create_player_from_stream(level_file);
 255     if (skipped_player == NULL) {
 256         RETURN_LT(lt, -1);
 257     }
 258     destroy_player(skipped_player);
 259
 260     platforms_t * const platforms = create_platforms_from_stream(level_file);
 261     if (platforms == NULL) {
 262         RETURN_LT(lt, -1);
 263     }
 264     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 265
 266     goals_t * const goals = create_goals_from_stream(level_file);
 267     if (goals == NULL) {
 268         RETURN_LT(lt, -1);
 269     }
 270     level->goals = RESET_LT(level->lt, level->goals, goals);
 271
 272     lava_t * const lava = create_lava_from_stream(level_file);
 273     if (lava == NULL) {
 274         RETURN_LT(lt, -1);
 275     }
 276     level->lava = RESET_LT(level->lt, level->lava, lava);
 277
 278     platforms_t * const back_platforms = create_platforms_from_stream(level_file);
 279     if (back_platforms == NULL) {
 280         RETURN_LT(lt, -1);
 281     }
 282     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 283
 284     boxes_t * const boxes = create_boxes_from_stream(level_file);
 285     if (level->boxes == NULL) {
 286         RETURN_LT(lt, -1);
 287     }
 288     level->boxes = RESET_LT(level->lt, level->boxes, boxes);
 289
 290     RETURN_LT(lt, 0);
 291 }
 292
 293 int level_sound(level_t *level, sound_samples_t *sound_samples)
 294 {
 295     if (goals_sound(level->goals, sound_samples) < 0) {
 296         return -1;
 297     }
 298
 299     if (player_sound(level->player, sound_samples) < 0) {
 300         return -1;
 301     }
 302
 303     return 0;
 304 }
 305
 306 void level_toggle_debug_mode(level_t *level)
 307 {
 308     background_toggle_debug_mode(level->background);
 309 }