badge/jumpnrun/enemies.h

   1 #ifndef INCLUDED_JUMPNRUN_ENEMIES_H
   2 #define INCLUDED_JUMPNRUN_ENEMIES_H
   3
   4 #include <badge/ui/sprite.h>
   5 #include <badge/util/rectangle.h>
   6
   7 #include "tiles.h"
   8
   9 struct jumpnrun_game_state;
  10 struct jumpnrun_level;
  11 struct jumpnrun_tile_range;
  12
  13 struct jumpnrun_enemy;
  14
  15 typedef struct jumpnrun_enemy_type {
  16   unsigned            animation_ticks_per_frame;
  17   size_t              animation_length;
  18   badge_sprite const *animation_frames;
  19
  20   vec2d               spawn_inertia;
  21
  22   void (*collision_tiles)(struct jumpnrun_enemy             *self,
  23                           vec2d                             *desired_position,
  24                           struct jumpnrun_level             *lv,
  25                           struct jumpnrun_tile_range  const *visible_tiles);
  26   void (*collision_player)(struct jumpnrun_enemy      *self,
  27                            struct jumpnrun_game_state *state);
  28   void (*game_tick)(struct jumpnrun_enemy            *self,
  29                     struct jumpnrun_game_state       *state,
  30                     struct jumpnrun_level            *lv,
  31                     struct jumpnrun_tile_range const *visible_tiles);
  32 } jumpnrun_enemy_type;
  33
  34 typedef struct jumpnrun_enemy {
  35   vec2d                      spawn_pos;
  36   vec2d                      current_pos;
  37   vec2d                      inertia;
  38   unsigned                   flags;
  39   unsigned                   tick_counter;
  40   unsigned                   current_frame;
  41
  42   jumpnrun_enemy_type const *type;
  43 } jumpnrun_enemy;
  44
  45 static inline rectangle rect_from_enemy(jumpnrun_enemy const *enemy) {
  46   badge_sprite const *cur_sprite = &enemy->type->animation_frames[(enemy->tick_counter / enemy->type->animation_ticks_per_frame) % enemy->type->animation_length];
  47   rectangle r = { enemy->current_pos, { FIXED_POINT(cur_sprite->width, 0), FIXED_POINT(cur_sprite->height, 0) } };
  48   return r;
  49 }
  50
  51 enum {
  52   JUMPNRUN_ENEMY_SPAWNED     = 1,
  53   JUMPNRUN_ENEMY_UNAVAILABLE = 2
  54 };
  55
  56 enum {
  57   JUMPNRUN_ENEMY_TYPE_CAT,
  58
  59   JUMPNRUN_ENEMY_TYPE_COUNT
  60 };
  61
  62 extern jumpnrun_enemy_type const jumpnrun_enemy_type_data[JUMPNRUN_ENEMY_TYPE_COUNT];
  63
  64 void jumpnrun_process_enemy(jumpnrun_enemy                   *self,
  65                             badge_framebuffer                *fb,
  66                             struct jumpnrun_game_state       *state,
  67                             struct jumpnrun_level            *lv,
  68                             struct jumpnrun_tile_range const *visible_tiles);
  69 #endif