Ahora mismo, nuestro sprite de alienígena solo tiene un fotograma y, por tanto, siempre apunta en la misma dirección, se desplace hacia donde se desplace.
Esto debería ser bastante fácil de arreglar: solo tenemos que crear un fotograma para cada dirección y asegurarnos de que el fotograma 0 apunta en la Dirección 0 (Norte), el fotograma 1 apunta en la Dirección 1 (Nornoreste) y así sucesivamente.
Así es como cambié el Sprite 2, que será mi sprite de alienígena por defecto:
Vale, estos primeros cinco fotogramas representan un cuarto de vuelta, así que no hace falta dibujar cada uno de los demás: puedes usar estos y M para copiar, I para insertar un fotograma nuevo y K para pegar, y luego V para voltear verticalmente y H para voltear horizontalmente.
Por ejemplo, el fotograma 5 es igual que el fotograma 3 pero volteado verticalmente.
Cuando tengas los 16 fotogramas, abre tu evento Alien (Sprite Type 5) y actualízalo así:
EVENT SPRITETYPE5 ; FLEXI ALIENS ; ===================== SPRITEINK C ; colour the alien with C value IF SETTINGA = 0 ; Alien first appears RESTORE ; Restore the data table LET RND = L ; Store the Level number in RND ADD 50 TO RND ; and increase it by 500 WHILE DIRECTION <> RND ; While DIRECTION doesnt = RND READ DIRECTION ; Read value from DATA table READ SETTINGB ; Also read second value ENDWHILE ; Keep going until we find the value in RND LET SETTINGA = 1 ; When we find it change SA to 1 ENDIF IF SETTINGA = 1 ; Ready to get direction & reptitions READ DIRECTION ; Read the next movement into DIRECTION READ SETTINGB ; Read the repetitions into SettingB LET SETTINGA = 2 ; Got directions & reps IF IMAGE 2 ; is this image # 2? LET FRAME = DIRECTION ; yes, set its frame to its DIRECTION ENDIF ENDIF IF COLLISION 1 ; if hit by a torpedo OTHER ; switch to torpedo LET DIRECTION = 99 ; run the explosion ENDSPRITE ; return to this Alien LET TYPE = 6 ; Switch it to explosion type LET IMAGE = 4 ; Explosion image LET FRAME = 0 ; first frame LET DIRECTION = 0 ; tell explosion its an alien exploding ENDIF IF COLLISION 0 ; if enemy and player collide LET TYPE = 6 ; switch it to the explosion type LET IMAGE = 4 ; and the explosion image LET FRAME = 0 ; reset it to first frame LET DIRECTION = 0 ; this is an alen exploding OTHER LET DIRECTION = 99 ; trigger the player explosion ENDSPRITE ENDIF IF DIRECTION = 0 ; Move N SPRITEUP SPRITEUP ENDIF IF DIRECTION = 1 ; Move NNE SPRITERIGHT SPRITEUP SPRITEUP ENDIF IF DIRECTION = 2 ; Move NE SPRITERIGHT SPRITERIGHT SPRITEUP SPRITEUP ENDIF IF DIRECTION = 3 ; Move ENE SPRITERIGHT SPRITERIGHT SPRITEUP ENDIF IF DIRECTION = 4 ; Move E SPRITERIGHT SPRITERIGHT ENDIF IF DIRECTION = 5 ; Move ESE SPRITERIGHT SPRITERIGHT SPRITEDOWN ENDIF IF DIRECTION = 6 ; MOVE SE SPRITERIGHT SPRITERIGHT SPRITEDOWN SPRITEDOWN ENDIF IF DIRECTION = 7 ; MOVE SSE SPRITEDOWN SPRITEDOWN SPRITERIGHT ENDIF IF DIRECTION = 8 ; MOVE S SPRITEDOWN SPRITEDOWN ENDIF IF DIRECTION = 9 ; MOVE SSW SPRITEDOWN SPRITEDOWN SPRITELEFT ENDIF IF DIRECTION = 10 ; MOVE SW SPRITEDOWN SPRITEDOWN SPRITELEFT SPRITELEFT ENDIF IF DIRECTION = 11 ; MOVE WSW SPRITEDOWN SPRITELEFT SPRITELEFT ENDIF IF DIRECTION = 12 ; MOVE W SPRITELEFT SPRITELEFT ENDIF IF DIRECTION = 13 ; MOVE WNW SPRITELEFT SPRITELEFT SPRITEUP ENDIF IF DIRECTION = 14 ; MOVE NW SPRITELEFT SPRITELEFT SPRITEUP SPRITEUP ENDIF IF DIRECTION = 15 ; MOVE NNW SPRITELEFT SPRITEUP SPRITEUP ENDIF ; BOUNDARY CHECKING ; =================== IF X <= LEFTEDGE ; if alien reaches the left edge REMOVE ; remove it SUBTRACT 1 FROM S ; decrement the sprite counter SUBTRACT 1 FROM F ; decrement the alien counter ENDIF IF X >= RIGHTEDGE ; if alien reaches the right edge REMOVE ; remove it SUBTRACT 1 FROM S ; decrement the sprite counter SUBTRACT 1 FROM F ; decrement the alien counter ENDIF IF Y >= BOTTOMEDGE ; if alien reaches the right edge REMOVE ; remove it SUBTRACT 1 FROM S ; decrement the alien counter SUBTRACT 1 FROM F ENDIF IF Y < Q ; is alien above minimum height for releasing missiles? IF W > 0 ; yes, can alien release missiles? IF X < M ; yes, is Alien to the right of player? SUBTRACT X FROM M ; yes, how far to the right of player is alien? IF M <= 8 ; 8 or less pixels? LET AIRBORNE = 1 ; run the chance of firing routine ENDIF ADD X TO M ; reset M ELSE IF M < X ; is alien to the left of player? SUBTRACT M FROM X ; yes, how far to the left IF X < = 8 ; 8 pixels or less? LET AIRBORNE = 1; yes, run the chance of firing routine ENDIF ADD M TO X ; reset X ELSE ; enemy must be directly above player LET AIRBORNE = 1; run the chance of firing routine ENDIF ENDIF ENDIF ENDIF IF AIRBORNE = 1 ; Chance of firing routine IF S < 9 ; are there 8 or less sprites on screen? GETRANDOM H ; yes, get a random number from 0 to the aliens missile probability # IF RND = 1 ; is it 1? LET RND = DIRECTION ; yes, store aliens direction in RND SPAWN 3 6 ; spawn a missile SPAWNED ; switch to the spawned missile LET DIRECTION = RND ; set its direction to RND ENDSPRITE ; switch back to this alien ENDIF ENDIF LET AIRBORNE = 0 ; end the chance of firing routine ENDIF SUBTRACT 1 FROM SETTINGB ; decrement repetitions remaining IF SETTINGB = 0 ; has alien moved all repetitions? LET SETTINGA = 1 ; get the next direction & # of repetitions ENDIF DATA 51 0 8 20 7 8 6 8 5 8 4 16 DATA 52 0 8 20 9 8 10 8 11 8 12 16 DATA 53 0 12 48 11 2 10 2 9 2 8 2 7 2 6 2 5 2 4 40 5 2 6 2 7 2 8 2 9 2 10 40 DATA 54 0 4 48 5 2 6 2 7 2 8 2 9 2 10 2 11 2 12 40 11 2 10 2 9 2 8 2 7 2 6 40 DATA 55 0 13 26 14 4 15 4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 4 10 40 DATA 56 0 3 26 1 4 0 4 15 4 14 4 13 4 12 4 11 4 10 4 9 4 8 4 7 4 6 40 DATA 57 0 8 16 7 4 6 4 5 4 4 4 3 4 2 4 1 4 0 4 15 4 14 4 13 4 12 4 11 4 10 4 9 4 8 4 7 4 6 4 5 4 4 60 DATA 58 0 8 16 9 4 10 4 11 4 12 4 13 4 14 4 15 4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 4 10 4 11 2 12 60
Compila tu juego y ahora los alienígenas deberían apuntar en su dirección de desplazamiento.
A continuación, hay algunas cosas que quiero ordenar y luego estaremos listos para publicar MPAGD SHMUPKIT v1, ¡para que puedas empezar enseguida a construir tus propios shmups!