Dynamic imagebuttons set

[Master Set]

Hi!

In my battle system you can choose which enemy to attack by pushing an imagebutton with a portrait of that enemy.
It can be done with a screen like:

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screen choose_enemy:
    hbox xalign 0.5 yalign 0.5:
        imagebutton auto "demon_%s.png" action Jump('demon')
        imagebutton auto "dragon_%s.png" action Jump('dreagon')  

But enemies are different each time. And in different numbers. If one enemy is dead already i dont want to show his button. Wat if the new enemy appears in reinforsments?

How can i make my set of imagebuttons to change according to situation?

[xela]

I don't know your code patterns, but think along the lines of:

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enemies = []

enemies.append("demon")
enemies.append("dreagon")

screen choose_enemy:
    hbox xalign 0.5 yalign 0.5:
        for enemy in enemies:
            imagebutton auto "".join(["%s"%enemy, "_%s.png"]) action Jump(enemy)

enemies.remove("demon") # would get rid of a demon...

[i1abnrk]

I'd use a little atl and a bit vector. It requires there be a maximum number of enemies on the screen at a time but we can also have a buffer of enemies waiting to appear. This we call enemy_formation or something. Each enemy_formation has a list of positions and a bitvector (a list of booleans) to tell us the next open position in the formation. An enemy_remove function will clear the dead guy from the screen and check if the buffer has another enemy to replace it. The list of positions is a list of screen positions as (x,y) tuples. Each battle screen can get its own formation by having a global function to call.
I don't have time to write code for you atm but I just finished something similar so I'll come back in 12 hours or so to finish this. Maybe the psuedocode above can get the wheels turning in the meantime.

[i1abnrk]

To the next step I take is to develop an algorithm that fills variables into the battle scene script.
Nouns describe the data.
Nouns: atl, bitvector, list, booleans, maximum-number, enemies, screen, time, buffer of enemies waiting, enemy_formation, list of positions, next open position, enemy_position, enemy_remove, dead guy, function, screen positions, tuples, global function
Verbs: use, require there be, can also have, call, has, tell, remove, clear, check, replace, is a list of, get its own.
I am at a friends house but It's time to scidaddle. More in a couple hours.

[i1abnrk]

So I am picturing what a battle formation might look like. For my example I'll have a row of 3 enemies in the back (top of the screen). I like to use pixels rather than relative positions. I assume the default resolution of 1028 by 800px. Enemies will be 240 by 360px.
I start with a class Battle_Formation and put that in an init -1 python block, where user classes should be.

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init -1 python:
    class Battle_Formation_Factory:
        #the top left corners of the plots
        positions=[]
        #which positions are empty
        empty=[]
        __init__(positions=[(0,0)], empty=[True]):
            self.positions=positions
            self.empty=empty
        #make a function like this for each formation
        def default_formation():
            return self([(34,80), (394,80), (754,80)], [True, True, True])

Then I need an enemy buffer and the current formation in a global in the init python phase.

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init:
    python:
        current_formation = None
        current_plot=(0,0)
        enemy_buffer = []

Next I make a transform to put baddies in position.

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    transform battleground:
        xpos current_plot[0]
        ypos current_plot[1]

Lastly, a scene which I'll call battle_screen. But the contents are unimportant to the script.
And a label where it all comes together in the script.

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label draw_enemies:
    #Use the default formation if it hasn't been set already
    if not current_formation:
        current_formation = Battle_Formation_Factory.default_formation()
    #keeps count of the plots in a formation
    $plot_index=0
    #look at each plot in the formation to check if it is empty
    for flag in current_formation.empty:
        #if this plot has no enemy in it
        if flag:
            #somewhere else we are appending and removing enemies to the list
            #if there are enemies that haven't been fought
            $if len(enemy_buffer):
                #store the top left corner of the plot (x,y)
                current_plot = (current_formation.positions[plot_index][0], current_formation.positions[plot_index][1])
                #see renpy documents function index for renpy.show
                $renpy.show('enemy healthy', [battleground], 'master', 0, None, 'plot_'+str(plot_index)+'_enemy')
        #prepare the next plot
        $plot_index=plot_index+1

[Master Set]

I belive i need more experience with python to understand this. Too complicated for me right now. (

[Master Set]

Can someone tell me how this sting works exactly?

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imagebutton auto "".join(["%s"%enemy, "_%s.png"]) action Jump(enemy)

[xela]

Can someone tell me how this sting works exactly?

Code: Select all

imagebutton auto "".join(["%s"%enemy, "_%s.png"]) action Jump(enemy)

join is a string method: http://docs.python.org/2/library/stdtypes.html#str.join