How can I add RPG combat to my game?

[NadOtavlas]

My game is designed to be a standard VN in terms of gameplay but I would there to be a quick turn based RPG battle as part of an joke scene. I heard that Ren'py can make turn based RPG combat so I'm wondering what to do.

[StarWarriorSora]

I made a simple test to see how it work work. This is what I wrote in the script:

Code: Select all

label start:

    $currenthp = 50
    $maxhp = 50
    $currenthpe = 50
    $maxhpe = 50
    show screen battle
    
label battle:
    
    menu:
        
        "Attack":
            jump attack
        
        "Defend":
            jump defend
    
label attack:
    
    "You attack!"
    "You deal 10 damage!"
    
    $currenthpe -= 10
    
    if currenthpe <= 0:
        "You win!"
        jump end
    
    "Enemy attacks!"
    "You take 5 damage!"
    
    $currenthp -= 5
    
    if currenthp <= 0:
        "You lose!"
        jump end
    
    jump battle
    
label defend:
    
    "You defend!"
    "Enemy attacks!"
    "You take 3 damage!"
    
    $currenthp -= 3
    
    if currenthp <= 0:
        "You lose!"
        jump end
    
    jump battle

label end:

And this is what I had for the screen:

Code: Select all

screen battle:
    text "Player" xalign 0.0 yalign 0.0
    text "HP: [currenthp]/[maxhp]" xalign 0.0 yalign 0.05
    bar value currenthp range maxhp xalign 0.0 yalign 0.1 xmaximum 200
    text "Enemy" xalign 1.0 yalign 0.0
    text "HP: [currenthpe]/[maxhpe]" xalign 1.0 yalign 0.05
    bar value currenthpe range maxhpe xalign 1.0 yalign 0.1 xmaximum 200

This put the player's health bar on the top left and the opponent's health bar on the top right. You can obviously change the numbers to whatever you want, but that's what I did.

[NadOtavlas]

I made a simple test to see how it work work. This is what I wrote in the script:

Code: Select all

label start:

    $currenthp = 50
    $maxhp = 50
    $currenthpe = 50
    $maxhpe = 50
    show screen battle
    
label battle:
    
    menu:
        
        "Attack":
            jump attack
        
        "Defend":
            jump defend
    
label attack:
    
    "You attack!"
    "You deal 10 damage!"
    
    $currenthpe -= 10
    
    if currenthpe <= 0:
        "You win!"
        jump end
    
    "Enemy attacks!"
    "You take 5 damage!"
    
    $currenthp -= 5
    
    if currenthp <= 0:
        "You lose!"
        jump end
    
    jump battle
    
label defend:
    
    "You defend!"
    "Enemy attacks!"
    "You take 3 damage!"
    
    $currenthp -= 3
    
    if currenthp <= 0:
        "You lose!"
        jump end
    
    jump battle

label end:

And this is what I had for the screen:

Code: Select all

screen battle:
    text "Player" xalign 0.0 yalign 0.0
    text "HP: [currenthp]/[maxhp]" xalign 0.0 yalign 0.05
    bar value currenthp range maxhp xalign 0.0 yalign 0.1 xmaximum 200
    text "Enemy" xalign 1.0 yalign 0.0
    text "HP: [currenthpe]/[maxhpe]" xalign 1.0 yalign 0.05
    bar value currenthpe range maxhpe xalign 1.0 yalign 0.1 xmaximum 200

This put the player's health bar on the top left and the opponent's health bar on the top right. You can obviously change the numbers to whatever you want, but that's what I did.

Ok so some errors have been happening. The engine is telling me that the enemyhp value is not define when I try to attack. This is the code:

label rpgbattle1:
play music "track16.mp3"
with fade
"A Dragonlord draws near! Command?"
menu:
"Attack":
$currenthpe -= 35
jump attack
"Spell":
jump spelllist
"Run":
jump run
"Item":
jump item
label attack:
"[povname] attacks!"
"The Dragonlord's Hit Points have been reduced by 35."
jump enemy1turn

[rayminator]

this might help you out more
viewtopic.php?f=51&t=37710#p408490

the reason why you getting errors is because you didn't defined the variables

default enemyhp = 50
default currenthp = 50
default maxhp = 50
default maxhpe = 50

[NadOtavlas]

So I'm trying to have a magic system but magic can't seem to kill the enemy. Here's my code:

label hurt:
if maxmp <= 1:
"Thy MP is too low."
jump spelllist
else:
"[povname] chanted the spell of HURT."
"The Dragonlord's Hit Points have been reduced by 40."
if enemyhp1 <= 0:
jump boss1defeat
else:
jump enemy1turn

[Alex]

Check this samples too:
viewtopic.php?f=51&t=18047&start=15#p395926
viewtopic.php?f=51&t=18047&start=90#p529950