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/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     goals_t *goals;
  22     lava_t *lava;
  23     color_t background_color;
  24     platforms_t *back_platforms;
  25     background_t *background;
  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->background = PUSH_LT(lt, create_background(level->background_color), destroy_background);
  82     if (level->background == NULL) {
  83         RETURN_LT(lt, NULL);
  84     }
  85
  86     level->lt = lt;
  87
  88     fclose(RELEASE_LT(lt, level_file));
  89
  90     return level;
  91 }
  92
  93 void destroy_level(level_t *level)
  94 {
  95     assert(level);
  96     RETURN_LT0(level->lt);
  97 }
  98
  99 int level_render(const level_t *level, camera_t *camera)
 100 {
 101     assert(level);
 102
 103     player_focus_camera(level->player, camera);
 104
 105     if (camera_clear_background(camera, level->background_color) < 0) {
 106         return -1;
 107     }
 108
 109     const rect_t view_port = camera_view_port(camera);
 110
 111     background_move_to(level->background, vec(view_port.x + view_port.w * 0.5f,
 112                                               view_port.y + view_port.h * 0.5f));
 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 (lava_render(level->lava, camera) < 0) {
 127         return -1;
 128     }
 129
 130     if (platforms_render(level->platforms, camera) < 0) {
 131         return -1;
 132     }
 133
 134     if (goals_render(level->goals, camera) < 0) {
 135         return -1;
 136     }
 137
 138     /* TODO(#157): goals_cue is not supposed to be invoked in level_render
 139      *
 140      * But I simply couldn't find a better place for it.
 141      */
 142     goals_cue(level->goals, camera);
 143
 144     return 0;
 145 }
 146
 147 int level_update(level_t *level, float delta_time)
 148 {
 149     assert(level);
 150     assert(delta_time > 0);
 151
 152     player_update(level->player, level->platforms, delta_time);
 153
 154     player_hide_goals(level->player, level->goals);
 155     player_die_from_lava(level->player, level->lava);
 156
 157     goals_update(level->goals, delta_time);
 158     goals_checkpoint(level->goals, level->player);
 159     lava_update(level->lava, delta_time);
 160
 161     return 0;
 162 }
 163
 164 int level_event(level_t *level, const SDL_Event *event)
 165 {
 166     assert(level);
 167     assert(event);
 168
 169     switch (event->type) {
 170     case SDL_KEYDOWN:
 171         switch (event->key.keysym.sym) {
 172         case SDLK_SPACE:
 173             player_jump(level->player);
 174             break;
 175         }
 176         break;
 177
 178     case SDL_JOYBUTTONDOWN:
 179         if (event->jbutton.button == 1) {
 180             player_jump(level->player);
 181         }
 182         break;
 183     }
 184
 185     return 0;
 186 }
 187
 188 int level_input(level_t *level,
 189                 const Uint8 *const keyboard_state,
 190                 SDL_Joystick *the_stick_of_joy)
 191 {
 192     assert(level);
 193     assert(keyboard_state);
 194     (void) the_stick_of_joy;
 195
 196     if (keyboard_state[SDL_SCANCODE_A]) {
 197         player_move_left(level->player);
 198     } else if (keyboard_state[SDL_SCANCODE_D]) {
 199         player_move_right(level->player);
 200     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) < 0) {
 201         player_move_left(level->player);
 202     } else if (the_stick_of_joy && SDL_JoystickGetAxis(the_stick_of_joy, 0) > 0) {
 203         player_move_right(level->player);
 204     } else {
 205         player_stop(level->player);
 206     }
 207
 208     return 0;
 209 }
 210
 211 int level_reload_preserve_player(level_t *level, const char *file_name)
 212 {
 213     lt_t * const lt = create_lt();
 214     if (lt == NULL) {
 215         return -1;
 216     }
 217
 218     /* TODO(#104): duplicate code in create_level_from_file and level_reload_preserve_player */
 219
 220     FILE * const level_file = PUSH_LT(lt, fopen(file_name, "r"), fclose);
 221     if (level_file == NULL) {
 222         throw_error(ERROR_TYPE_LIBC);
 223         RETURN_LT(lt, -1);
 224     }
 225
 226     char color[7];
 227     if (fscanf(level_file, "%6s", color) == EOF) {
 228         throw_error(ERROR_TYPE_LIBC);
 229         RETURN_LT(lt, -1);
 230     }
 231     level->background_color = color_from_hexstr(color);
 232
 233     player_t * const skipped_player = create_player_from_stream(level_file);
 234     if (skipped_player == NULL) {
 235         RETURN_LT(lt, -1);
 236     }
 237     destroy_player(skipped_player);
 238
 239     platforms_t * const platforms = create_platforms_from_stream(level_file);
 240     if (platforms == NULL) {
 241         RETURN_LT(lt, -1);
 242     }
 243     level->platforms = RESET_LT(level->lt, level->platforms, platforms);
 244
 245     goals_t * const goals = create_goals_from_stream(level_file);
 246     if (goals == NULL) {
 247         RETURN_LT(lt, -1);
 248     }
 249     level->goals = RESET_LT(level->lt, level->goals, goals);
 250
 251     lava_t * const lava = create_lava_from_stream(level_file);
 252     if (lava == NULL) {
 253         RETURN_LT(lt, -1);
 254     }
 255     level->lava = RESET_LT(level->lt, level->lava, lava);
 256
 257     platforms_t * const back_platforms = create_platforms_from_stream(level_file);
 258     if (back_platforms == NULL) {
 259         RETURN_LT(lt, -1);
 260     }
 261     level->back_platforms = RESET_LT(level->lt, level->back_platforms, back_platforms);
 262
 263     RETURN_LT(lt, 0);
 264 }
 265
 266 int level_sound(level_t *level, sound_medium_t *sound_medium)
 267 {
 268     if (goals_sound(level->goals, sound_medium) < 0) {
 269         return -1;
 270     }
 271
 272     if (player_sound(level->player, sound_medium) < 0) {
 273         return -1;
 274     }
 275
 276     return 0;
 277 }