1 files changed, 52 insertions, 0 deletions
diff --git a/src/metasprite.c b/src/metasprite.c
new file mode 100644
index 0000000..262d1c4
--- /dev/null
+++ b/src/metasprite.c
@@ -0,0 +1,52 @@
+#include "metasprite.h"
+
+inline void metasprite_init(Metasprite *metasprite) {
+  metasprite_update_tiles(metasprite);
+  metasprite_move_to(metasprite, metasprite->x, metasprite->y);
+}
+
+inline void metasprite_move_offset(Metasprite *metasprite,
+                                   ScreenCoordinate offset_x,
+                                   ScreenCoordinate offset_y) {
+  metasprite_move_to(metasprite, metasprite->x + offset_x,
+                     metasprite->y + offset_y);
+}
+
+// TODO: consider height and width
+inline void metasprite_move_to(Metasprite *metasprite, ScreenCoordinate new_x,
+                               ScreenCoordinate new_y) {
+  metasprite->x = new_x;
+  metasprite->y = new_y;
+  move_sprite(metasprite->sprite_ids[0], new_x, new_y);
+  move_sprite(metasprite->sprite_ids[1], new_x, new_y + TILE_SIZE);
+  move_sprite(metasprite->sprite_ids[2], new_x + TILE_SIZE, new_y);
+  move_sprite(metasprite->sprite_ids[3], new_x + TILE_SIZE, new_y + TILE_SIZE);
+}
+
+inline void metasprite_apply_gravity(Metasprite *metasprite) {
+  metasprite->velocity_y += GRAVITY_ACCELERATION;
+}
+
+inline void metasprite_update_position_using_velocity(Metasprite *metasprite) {
+  metasprite->x += metasprite->velocity_x;
+  metasprite->y += metasprite->velocity_y;
+  metasprite_move_to(metasprite, metasprite->x, metasprite->y);
+}
+
+inline void metasprite_jump(Metasprite *metasprite) {
+  metasprite->velocity_y = JUMP_VELOCITY;
+}
+
+inline void metasprite_update_tiles(Metasprite *metasprite) {
+  set_sprite_tile(metasprite->sprite_ids[0], metasprite->tile_ids[0]);
+  set_sprite_tile(metasprite->sprite_ids[1], metasprite->tile_ids[1]);
+  set_sprite_tile(metasprite->sprite_ids[2], metasprite->tile_ids[2]);
+  set_sprite_tile(metasprite->sprite_ids[3], metasprite->tile_ids[3]);
+}
+
+inline void metasprite_hide(Metasprite *metasprite) {
+  move_sprite(metasprite->sprite_ids[0], 0, 0);
+  move_sprite(metasprite->sprite_ids[1], 0, 0);
+  move_sprite(metasprite->sprite_ids[2], 0, 0);
+  move_sprite(metasprite->sprite_ids[3], 0, 0);
+}