Adding Enemy Projectiles to MetroidVania 4.5.9

[warpedpipe]

How would I go about adding the ability for an enemy to shoot a projectile using the MetroidVania module? I dont recall seeing any tutorials on making enemies shoot.

 

[tbizzle]

Read through this tutorial. Pretty easy.

4.5.9 Bring Back Monster Weapons (Maze Module) and Others!

If your "doHandleObjectCollisions.asm" is missing the area for monster weapons or they seem to be not working for you try this: Using the script of the same name above in Maze module as a base at line 98 you'll see the end of your monster player collision section. "+notPlayerMonsterCollision:"...

www.nesmakers.com

 

[baardbi]

How would I go about adding the ability for an enemy to shoot a projectile using the MetroidVania module? I dont recall seeing any tutorials on making enemies shoot.

Here's an AI script you can use for an Enemy Shoot action:

;;; Monster shoot

CountObjects #%00010000
CMP #2 ;Limit projectiles
BCC +doEnemyShoot
    JMP +skipEnemyShoot
+doEnemyShoot

    LDA Object_x_hi,x
    CLC
    ADC #4 ;Offset
    STA tempA

    LDA Object_screen,x
    STA tempC

    LDA Object_y_hi,x
    CLC
    ADC #4 ;Offset
    STA tempB

    LDA Object_direction,x
    AND #%00000111
    STA tempD

    TXA
    PHA

    CreateObjectOnScreen tempA, tempB, #10, #0, tempC  ;;; #10 is the game object used
                                                       ;;; as an enemy projectile in
                                                       ;;; this example.
    ;;; x, y, object, starting action.
    ;;; and now with that object, copy the player's
    ;;; direction and start it moving that way.

    LDA tempD
    STA Object_direction,x
    TAY
    LDA DirectionTableOrdered,y
    STA temp1
    STX temp
    StartMoving temp, temp1

    PLA
    TAX

+skipEnemyShoot

And yes. You also need to do the thing tbizzle talked about, or else you wont be able to collide with the enemy weapons.