topic Re: Possible for the user to add to an array? in GDL

Possible for the user to add to an array?

JGoode — Thu, 10 Mar 2022 11:29:02 GMT

Hello,

I am creating a 2D "person" object and I would like the clothes to be randomised using an array. I currently have it working as such:

top_random = rnd(vardim1(top_colour)) pen top_colour[top_random]

The user is able to edit the current values of the array (to set the pens they want to randomise from) but I was wondering if there is any way that the user is able to add / remove lines of the array to reduce or increase potential pens as it is currently greyed out?

Many thanks

Re: Possible for the user to add to an array?

runxel — Thu, 10 Mar 2022 14:14:15 GMT

Yes, that is possible.

But you need an UI, tho. You are right, the user can't change the dimension of the array later on. Teh reason behind this is that the programmer needs to be in control of their data structure – everything else would invoke hazard sooner or later for sure.

If you have an UI you could script the adding and deleting. E.g. the old room stamp had something you could reuse (at least the german one had this feature):

You have to tie a function to the buttons basically.

Or, a completely different way I implemented in some of my objects, is to actually parse a string and populate the array afterwards.

The input could look like this "1,44, 6-17, 25, 3". A bit like printing pages from a PDF.

I also tried something totally ridiculous: Overlaying an ui_infield (to have the accurat color represenation) by an ui_pict_pushcheckbutton.... but that does not really work.

Re: Possible for the user to add to an array?

JGoode — Fri, 11 Mar 2022 11:00:03 GMT

Thanks for your help. I added in a way to add rows to the array using a boolean and it seems to work well. I was wondering if you knew of a way to then reduce the rows using a similar method. I had a look in the Zone Stamp as that has a way of adding and removing but I found it rather confusing to follow!

if (glob_modpar_name = "add_top") then if (add_top) then num_top = vardim1(top_colour) + 1 top_colour[num_top] = 1 add_top = 0 parameters add_top=add_top parameters top_colour=top_colour endif endif

Re: Possible for the user to add to an array?

runxel — Fri, 11 Mar 2022 12:38:19 GMT

Deleting rows is similar, but you'll need another temp structure.

Following your style:

dim EMPTYARRAY[] !... if GLOB_MODPAR_NAME = "del_top" then if del_top then dim temp[] for i=1 to vardim1(top_colour)-1 temp[i] = top_color[i] next i ! reset the array first top_colour = EMPTYARRAY top_colour = temp del_top = 0 parameters \ del_top = del_top, top_colour = top_colour endif endif

Re: Possible for the user to add to an array?

JGoode — Fri, 11 Mar 2022 12:58:38 GMT

You're a genius! Thank you so much for your help, that is working perfectly now.