src/game/level.c

   1 #include <SDL2/SDL.h>
   2 #include <assert.h>
   3
   4 #include "game/level.h"
   5 #include "game/level/background.h"
   6 #include "game/level/camera.h"
   7 #include "game/level/goals.h"
   8 #include "game/level/lava.h"
   9 #include "game/level/platforms.h"
  10 #include "game/level/player.h"
  11 #include "system/error.h"
  12 #include "system/lt.h"
  13
  14 /* TODO(#118): Level doesn't play the Nothing and Something sounds when the goal get into view */
  15
  16 struct level_t
  17 {
  18     lt_t *lt;
  19     player_t *player;
  20     platforms_t *platforms;
  21     camera_t *camera;
  22     goals_t *goals;
  23     lava_t *lava;
  24     color_t background_color;
  25     platforms_t *back_platforms;
  26     background_t *background;
  27 };
  28
  29 level_t *create_level_from_file(const char *file_name)
  30 {
  31     assert(file_name);
  32
  33     lt_t *const lt = create_lt();
  34     if (lt == NULL) {
  35         return NULL;
  36     }
  37
  38     level_t *const level = PUSH_LT(lt, malloc(sizeof(level_t)), free);
  39     if (level == NULL) {
  40         throw_error(ERROR_TYPE_LIBC);
  41         RETURN_LT(lt, NULL);
  42     }
  43
  44     FILE *level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose);
  45     if (level_file == NULL) {
  46         throw_error(ERROR_TYPE_LIBC);
  47         RETURN_LT(lt, NULL);
  48     }
  49
  50     char color[7];
  51     if (fscanf(level_file, "%6s", color) == EOF) {
  52         throw_error(ERROR_TYPE_LIBC);
  53         RETURN_LT(lt, NULL);
  54     }
  55     level->background_color = color_from_hexstr(color);
  56
  57     level->player = PUSH_LT(lt, create_player_from_stream(level_file), destroy_player);
  58     if (level->player == NULL) {
  59         RETURN_LT(lt, NULL);
  60     }
  61
  62     level->platforms = PUSH_LT(lt, create_platforms_from_stream(level_file), destroy_platforms);
  63     if (level->platforms == NULL) {
  64         RETURN_LT(lt, NULL);
  65     }
  66
  67     level->goals = PUSH_LT(lt, create_goals_from_stream(level_file), destroy_goals);
  68     if (level->goals == NULL) {
  69         RETURN_LT(lt, NULL);
  70     }
  71
  72     level->lava = PUSH_LT(lt, create_lava_from_stream(level_file), destroy_lava);
  73     if (level->lava == NULL) {
  74         RETURN_LT(lt, NULL);
  75     }
  76
  77     level->back_platforms = PUSH_LT(lt, create_platforms_from_stream(level_file), destroy_platforms);
  78     if (level->back_platforms == NULL) {
  79         RETURN_LT(lt, NULL);
  80     }
  81
  82     level->camera = PUSH_LT(lt, create_camera(), destroy_camera);
  83     if (level->camera == NULL) {
  84         RETURN_LT(lt, NULL);
  85     }
  86
  87     level->background = PUSH_LT(lt, create_background(level->background_color), destroy_background);
  88     if (level->background == NULL) {
  89         RETURN_LT(lt, NULL);
  90     }
  91
  92     level->lt = lt;
  93
  94     fclose(RELEASE_LT(lt, level_file));
  95
  96     return level;
  97 }
  98
  99 void destroy_level(level_t *level)
 100 {
 101     assert(level);
 102     RETURN_LT0(level->lt);
 103 }
 104
 105 int level_render(const level_t *level, SDL_Renderer *renderer)
 106 {
 107     assert(level);
 108     assert(renderer);
 109
 110     if (camera_clear_background(level->camera, level->background_color) < 0) {
 111         return -1;
 112     }
 113
 114     const rect_t view_port = camera_view_port(level->camera, renderer);
 115
 116     background_move_to(level->background, vec(view_port.x + view_port.w * 0.5f,
 117                                               view_port.y + view_port.h * 0.5f));
 118
 119     if (background_render(level->background, renderer, level->camera) < 0) {
 120         return -1;
 121     }
 122
 123     if (platforms_render(level->back_platforms, level->camera) < 0) {
 124         return -1;
 125     }
 126
 127     if (player_render(level->player, renderer, level->camera) < 0) {
 128         return -1;
 129     }
 130
 131     if (lava_render(level->lava, renderer, level->camera) < 0) {
 132         return -1;
 133     }
 134
 135     if (platforms_render(level->platforms, level->camera) < 0) {
 136         return -1;
 137     }
 138
 139     if (goals_render(level->goals, renderer, level->camera) < 0) {
 140         return -1;
 141     }
 142
 143     /* TODO(#157): goals_cue is not supposed to be invoked in level_render
 144      *
 145      * But I simply couldn't find a better place for it.
 146      */
 147     goals_cue(level->goals, level->camera);
 148
 149     return 0;
 150 }
 151
 152 int level_update(level_t *level, float delta_time)
 153 {
 154     assert(level);
 155     assert(delta_time > 0);
 156
 157     player_update(level->player, level->platforms, delta_time);
 158     player_focus_camera(level->player, level->camera);
 159     player_hide_goals(level->player, level->goals);
 160     player_die_from_lava(level->player, level->lava);
 161
 162     goals_update(level->goals, delta_time);
 163     goals_checkpoint(level->goals, level->player);
 164     lava_update(level->lava, delta_time);
 165
 166     return 0;
 167 }
 168
 169 int level_event(level_t *level, const SDL_Event *event)
 170 {
 171     assert(level);
 172     assert(event);
 173
 174     switch (event->type) {
 175     case SDL_KEYDOWN:
 176         switch (event->key.keysym.sym) {
 177         case SDLK_SPACE:
 178             player_jump(level->player);
 179             break;
 180         }
 181         break;
 182
 183     case SDL_JOYBUTTONDOWN:
 184         if (event->jbutton.button == 1) {
 185             player_jump(level->player);
 186         }
 187         break;
 188     }
 189
 190     return 0;
 191 }
 192
 193 int level_input(level_t *level,
 194                 const Uint8 *const keyboard_state,
 195                 SDL_Joystick *the_stick_of_joy)
 196 {
 197     assert(level);
 198     assert(keyboard_state);
 199     (void) the_stick_of_joy;
 200
 201     if (keyboard_state[SDL_SCANCODE_A]) {
 202         player_move_left(level->player);
 203     } else if (keyboard_state[SDL_SCANCODE_D]) {
 204         player_move_right(level->player);
 205     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 206         player_move_left(level->player);
 207     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 208         player_move_right(level->player);
 209     } else {
 210         player_stop(level->player);
 211     }
 212
 213     return 0;
 214 }
 215
 216 void level_toggle_debug_mode(level_t *level)
 217 {
 218     camera_toggle_debug_mode(level->camera);
 219 }
 220
 221 void level_toggle_pause_mode(level_t *level)
 222 {
 223     camera_toggle_blackwhite_mode(level->camera);
 224 }
 225
 226 int level_reload_preserve_player(level_t *level, const char *file_name)
 227 {
 228     lt_t * const lt = create_lt();
 229     if (lt == NULL) {
 230         return -1;
 231     }
 232
 233     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 234
 235     FILE * const level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose);
 236     if (level_file == NULL) {
 237         throw_error(ERROR_TYPE_LIBC);
 238         RETURN_LT(lt, -1);
 239     }
 240
 241     char color[7];
 242     if (fscanf(level_file, "%6s", color) == EOF) {
 243         throw_error(ERROR_TYPE_LIBC);
 244         RETURN_LT(lt, -1);
 245     }
 246     level->background_color = color_from_hexstr(color);
 247
 248     player_t * const skipped_player = create_player_from_stream(level_file);
 249     if (skipped_player == NULL) {
 250         RETURN_LT(lt, -1);
 251     }
 252     destroy_player(skipped_player);
 253
 254     platforms_t * const platforms = create_platforms_from_stream(level_file);
 255     if (platforms == NULL) {
 256         RETURN_LT(lt, -1);
 257     }
 258     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 259
 260     goals_t * const goals = create_goals_from_stream(level_file);
 261     if (goals == NULL) {
 262         RETURN_LT(lt, -1);
 263     }
 264     level->goals = RESET_LT(level->lt, level->goals, goals);
 265
 266     lava_t * const lava = create_lava_from_stream(level_file);
 267     if (lava == NULL) {
 268         RETURN_LT(lt, -1);
 269     }
 270     level->lava = RESET_LT(level->lt, level->lava, lava);
 271
 272     platforms_t * const back_platforms = create_platforms_from_stream(level_file);
 273     if (back_platforms == NULL) {
 274         RETURN_LT(lt, -1);
 275     }
 276     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 277
 278     RETURN_LT(lt, 0);
 279 }
 280
 281 int level_sound(level_t *level, sound_medium_t *sound_medium)
 282 {
 283     if (goals_sound(level->goals, sound_medium) < 0) {
 284         return -1;
 285     }
 286
 287     if (player_sound(level->player, sound_medium) < 0) {
 288         return -1;
 289     }
 290
 291     return 0;
 292 }