+ static int ep_can_explode[] =
+ {
+ /* same elements as in 'ep_explodes_impact' */
+ EL_BOMB,
+ EL_SP_DISK_ORANGE,
+ EL_DX_SUPABOMB,
+
+ /* same elements as in 'ep_explodes_smashed' */
+ EL_SATELLITE,
+ EL_PIG,
+ EL_DRAGON,
+ EL_MOLE,
+
+ /* elements that can explode by explosion or by dragonfire */
+ EL_DYNAMITE_ACTIVE,
+ EL_DYNAMITE,
+ EL_DYNABOMB_PLAYER_1_ACTIVE,
+ EL_DYNABOMB_PLAYER_2_ACTIVE,
+ EL_DYNABOMB_PLAYER_3_ACTIVE,
+ EL_DYNABOMB_PLAYER_4_ACTIVE,
+ EL_DYNABOMB_INCREASE_NUMBER,
+ EL_DYNABOMB_INCREASE_SIZE,
+ EL_DYNABOMB_INCREASE_POWER,
+ EL_SP_DISK_RED_ACTIVE,
+ EL_BUG,
+ EL_PENGUIN,
+ EL_SP_DISK_RED,
+ EL_SP_DISK_YELLOW,
+ EL_SP_SNIKSNAK,
+ EL_SP_ELECTRON,
+
+ /* elements that can explode only by explosion */
+ EL_BLACK_ORB,
+ -1
+ };
+
+ static int ep_gravity_reachable[] =
+ {
+ EL_SAND,
+ EL_SP_BASE,
+ EL_TRAP,
+ EL_INVISIBLE_SAND,
+ EL_INVISIBLE_SAND_ACTIVE,
+ EL_SP_PORT_LEFT,
+ EL_SP_PORT_RIGHT,
+ EL_SP_PORT_UP,
+ EL_SP_PORT_DOWN,
+ EL_SP_PORT_HORIZONTAL,
+ EL_SP_PORT_VERTICAL,
+ EL_SP_PORT_ANY,
+ EL_SP_GRAVITY_PORT_LEFT,
+ EL_SP_GRAVITY_PORT_RIGHT,
+ EL_SP_GRAVITY_PORT_UP,
+ EL_SP_GRAVITY_PORT_DOWN,
+ EL_SP_GRAVITY_ON_PORT_LEFT,
+ EL_SP_GRAVITY_ON_PORT_RIGHT,
+ EL_SP_GRAVITY_ON_PORT_UP,
+ EL_SP_GRAVITY_ON_PORT_DOWN,
+ EL_SP_GRAVITY_OFF_PORT_LEFT,
+ EL_SP_GRAVITY_OFF_PORT_RIGHT,
+ EL_SP_GRAVITY_OFF_PORT_UP,
+ EL_SP_GRAVITY_OFF_PORT_DOWN,
+ -1
+ };
+