[SOLVED] Projectile on Maze module help 4.5.6.

[5kids2feed]

So.. I've had many errors while messing around with everything on this module.. I've tried to refrain from asking too many questions and figure out basic things on my own. I was able to fix my hud with the missing variable errors I was getting and a couple other things. All because I was adding my own pixels and such.

But..

This seems like such a simple thing and I can't understand why it's happening.. I shoot my projectile at my monster and it doesn't even register and flies right through him. I have it set as a player weapon. I have doHurtMonster inserted in the game... bounding boxes are setup on both the monster and the projectile... "monster" is checked off on the monster attributes.. I was following along on a tutorial.. They don't register each other though. The projectile will destroy itself on solid objects and the edge of the screen.. but not the monster. I've tried setting the monster health at 1 and 0 to see if that was it.. but my brain is about to explode trying to figure out this simple thing. Any help would be greatly appreciated. Thanks!

 

[jim]

Did you set your projectile to a player's weapon?

 

[5kids2feed]

Yep! Player even shoots it as a projectile. That’s why it’s boggling my mind.

 

[dale_coop]

The reason is that in the Maze module, the player projectile is not implemented (collision detection between a player weapon object and monsters).
Here's how you could add the code to destroy monsters with your projectiles:
Modify the script assigned to the "Handle Object Collisions" in your "Project Settings > Scripts Settings" (under Subroutines), and line 55, just after the comments line :

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

Add all that code for adding the player weapon object support :

        LDA Object_flags,x
        AND #%00000100
        BNE +isWeapon
            JMP +notPlayerWeapon
        +isWeapon:
                LDX #$00
                loop_objectCollision:
                    CPX selfObject
                        BNE +notSelfObject
                            JMP +skipCollision
                        +notSelfObject
                LDA Object_status,x
                AND #%10000000
                BNE +isActive
                    JMP +skipCollision
                +isActive:
                LDA Object_flags,x
                AND #%00001000
                BNE isMonsterWeaponCol
                    JMP +notAmonsterWeaponCollision
                isMonsterWeaponCol:
                    JSR getOtherColBox
                    JSR doCompareBoundingBoxes
                        ;;; if they have collided, it is a 1
                        ;;; if not, it is a zero.
                        BEQ +skipCollision
                            TXA
                            STA otherObject
                            ;; There was a collision between a monster and a weapon.
                            ;; weapon is self.
                            ;; monster is other.
                           
                            ;; HERE, what do do when the player weapon is colliding against a monster :
                            ; JSR doHandleHurtMonster
                            DestroyObject
                            AddValue #$06, myScore, #$05, #$02
                            UpdateHudElement #$03

                            JMP +done              
                    +skipCollision
                +notAmonsterWeaponCollision
                INX
                CPX #TOTAL_MAX_OBJECTS
                BEQ +lastCollisionForThisObject
                    JMP loop_objectCollision
            +lastCollisionForThisObject
            JMP +done
            +notPlayerWeapon:

 

[5kids2feed]

Omg.. Dale... I love you.. It works! That makes so much sense. Didn't think how projectiles were setup in the Maze Module.

Only one issue.. the projectile doesn't destroy itself when it hits the monster. The monster dies but not my weapon. I have it set to destroy when it hits a solid object or the edge.. could there possibly be a little line of code i'm missing for that?

Seriously, thank you so much for your help.

 

[dale_coop]

No problem, to destroy the player weapon...
Modify the script... around line 95, just before the line:

                            JMP +done

Add those lines:

                            ;; now we can destoy the player weapon
                            LDX selfObject
                            DestroyObject
                            LDX otherObject

 

[5kids2feed]

That was it! I would've never figured that one out on my own since my coding skills are non existent. You're the man. Thank you as always.

 

[dale_coop]

Glad to help
(...when/if I can)

 

[5kids2feed]

Dale... I have another issue if you're still around lol. What's an easy way to fix this? My game is so small. Like 7 spaces on the overworld along with the bottom row for start, win, and end screens. Do I have too much unnecessary code because I was adding things to the maze module? Somehow i'm at 247 bites :/

 

[5kids2feed]

WAIT. Jumped the gun again. Sorry, Dale. It's because I made one of my game object files too big by accident. Carry on

 

[dale_coop]

Yeah, space in our banks is limited... find a way to optimize your scripts

 

[5kids2feed]

Hey @dale_coop buddy ol' pal!.. say I wanted to add in the collisions for a monster weapon to hurt a player.. what would I script in it? Trying to change the code myself but messing it up lol.

 

[dale_coop]

To implement monster weapon (if not yet in your module):

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

 

[5kids2feed]

All hail King Dale!

Works! ..but one problem.. it hurts the player as soon as the monster starts to shoot projectile instead of when it touches him. hmmmm.

EDIT: Nevermind! was placing it on the top of the script instead of the bottom hahha. oh boy. Got it! You the man!

 

[egg]

Wanted to say thanks for this, I was having troubles here too. worked great