badge/jumpnrun/enemies.h

   1 #ifndef INCLUDED_JUMPNRUN_ENEMIES_H
   2 #define INCLUDED_JUMPNRUN_ENEMIES_H
   3
   4 #include "../ui/sprite.h"
   5 #include "../util/rectangle.h"
   6
   7 #include "moveable.h"
   8 #include "tiles.h"
   9
  10 struct jumpnrun_game_state;
  11 struct jumpnrun_level;
  12 struct jumpnrun_tile_range;
  13
  14 struct jumpnrun_enemy;
  15
  16 typedef struct jumpnrun_enemy_type {
  17   unsigned            animation_ticks_per_frame;
  18   size_t              animation_length;
  19   badge_sprite const *animation_frames;
  20
  21   vec2d               extent;
  22   rectangle           hitbox;
  23   vec2d               spawn_inertia;
  24
  25   void (*collision_tiles)(struct jumpnrun_enemy             *self,
  26                           vec2d                             *desired_position,
  27                           struct jumpnrun_level             *lv,
  28                           struct jumpnrun_tile_range  const *visible_tiles);
  29   void (*collision_player)(struct jumpnrun_enemy      *self,
  30                            struct jumpnrun_game_state *state,
  31                            vec2d                      *player_inertia_mod);
  32   void (*collision_shots)(struct jumpnrun_enemy      *self,
  33                           struct jumpnrun_game_state *state);
  34
  35   void (*move_tick)(struct jumpnrun_enemy            *self,
  36                     struct jumpnrun_game_state       *state,
  37                     struct jumpnrun_level            *lv,
  38                     struct jumpnrun_tile_range const *visible_tiles,
  39                     vec2d                            *player_inertia_mod);
  40 } jumpnrun_enemy_type;
  41
  42 typedef struct jumpnrun_enemy {
  43   jumpnrun_moveable base;
  44   vec2d             spawn_pos;
  45   unsigned          flags;
  46
  47   jumpnrun_enemy_type const *type;
  48 } jumpnrun_enemy;
  49
  50 enum {
  51   JUMPNRUN_ENEMY_SPAWNED      = 1,
  52   JUMPNRUN_ENEMY_UNAVAILABLE  = 2,
  53   JUMPNRUN_ENEMY_FACING_RIGHT = 4
  54 };
  55
  56 static inline rectangle    const *enemy_box         (jumpnrun_enemy const *enemy) { return &enemy->base.current_box   ; }
  57 static inline vec2d               enemy_position    (jumpnrun_enemy const *enemy) { return enemy->base.current_box.pos; }
  58 static inline rectangle           enemy_hitbox      (jumpnrun_enemy const *enemy) { rectangle r = enemy->type->hitbox; rectangle_move_rel(&r, enemy_position(enemy)); return r; }
  59 static inline badge_sprite const *enemy_sprite      (jumpnrun_enemy const *enemy) { return &enemy->type->animation_frames[enemy->base.anim_frame]; }
  60
  61 static inline bool                enemy_facing_right(jumpnrun_enemy const *enemy) { return (enemy->flags & JUMPNRUN_ENEMY_FACING_RIGHT) || fixed_point_gt(enemy->base.inertia.x, FIXED_INT(0)); }
  62 static inline uint8_t             enemy_render_flags(jumpnrun_enemy const *enemy) { return enemy_facing_right(enemy) ? BADGE_BLT_MIRRORED : 0; }
  63
  64 enum {
  65   JUMPNRUN_ENEMY_TYPE_CAT,
  66   JUMPNRUN_ENEMY_TYPE_MUSHROOM,
  67   JUMPNRUN_ENEMY_TYPE_BUNNY,
  68   JUMPNRUN_ENEMY_TYPE_SNAKE,
  69   JUMPNRUN_ENEMY_TYPE_SPIRAL,
  70   JUMPNRUN_ENEMY_TYPE_ROTOR,
  71   JUMPNRUN_ENEMY_TYPE_DOG,
  72   JUMPNRUN_ENEMY_TYPE_GIRAFFE,
  73   JUMPNRUN_ENEMY_TYPE_BIRD,
  74
  75   JUMPNRUN_ENEMY_TYPE_COUNT
  76 };
  77
  78 extern jumpnrun_enemy_type const jumpnrun_enemy_type_data[JUMPNRUN_ENEMY_TYPE_COUNT];
  79
  80 void jumpnrun_process_enemy(jumpnrun_enemy                   *self,
  81                             badge_framebuffer                *fb,
  82                             struct jumpnrun_game_state       *state,
  83                             struct jumpnrun_level            *lv,
  84                             struct jumpnrun_tile_range const *visible_tiles,
  85                             vec2d                            *player_inertia_mod);
  86 #endif