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Problem with loop and random option.

InfectedX

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 Hello, i'm making a script but i'm having problems with the rand command

This is the error i have:
  

[Error]: buildin_rand: range (0) is too small. No randomness possible.
[Warning]: Script command 'rand' returned failure.
[Debug]: Source (NPC): test#thts at 1@thts (156,371)
[Debug]: Source (NPC): test#thts is located in: INSTANCING

And this is my script...  

	setarray 'floors[0],3,4,5,6;
	setarray 'maps$[0],instance_mapname("3@thts"),instance_mapname("4@thts"),instance_mapname("5@thts"),instance_mapname("6@thts");
	setarray 'xs[0],27,18,155,50;
	setarray 'ys[0],44,97,100,18;
	.@loop = getarraysize('floors);
	for (.@i = 1; .@i <= .@loop ; .@i++) {
		.@r = rand(getarraysize('floors));
		'order[.@i] = 'floors[.@r];
		deletearray 'floors[.@r],1;
		'wm$[.@i] = 'maps$[.@r];
		deletearray 'maps$[.@r],1;
		'wx[.@i] = 'xs[.@r];
		deletearray 'xs[.@r],1;
		'wy[.@i] = 'ys[.@r];
		deletearray 'ys[.@r],1;
	}



The purpose of the code is to randomly shuffle and assign properties (map name, X-coordinate, and Y-coordinate) to a set of floors in a tower instance i'm making. Here's a breakdown of the code:

1. Initialize arrays for floors, map names, X-coordinates, and Y-coordinates.
2. Determine the number of floors in the tower.
3. Use a loop to randomly select a floor from the remaining options and assign its properties (map name, X-coordinate, and Y-coordinate).
4. Remove the selected floor and its associated properties from the available options to avoid repetition.

Possible reasons for issues in the code:
- The algorithm relies on the 'rand' function to generate random numbers.
- Confirm that the arrays are properly initialized and that the indices match between arrays.

Could anyone here help me? what i'm doing wrong? xD

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Tokei Garling

Tokei

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Posted (edited)

There is no issue with the code sample you've provided. It's a bit hard to read, but besides that, it works fine for me. To make your life easier though, may I suggest using a command like shufflearray instead? Like so: 

BUILDIN_DEF(shufflearray,"r?"),

BUILDIN_FUNC(shufflearray)
{
	map_session_data* sd = NULL;
	int i, j;
	int array_size = script_hasdata(st, 3) ? script_getnum(st, 3) : -1;

	struct script_data* data = script_getdata(st, 2);

	if (!data_isreference(data)) {
		ShowError("buildin_shufflearray: not a variable\n");
		script_reportdata(data);
		script_pushnil(st);
		st->state = END;
		return SCRIPT_CMD_FAILURE;
	}

	const char* name = reference_getname(data);
	int32 id = reference_getid(data);

	if (not_server_variable(*name)) {
		sd = map_id2sd(st->rid);

		if (sd == NULL)
			return SCRIPT_CMD_SUCCESS;
	}

	if (array_size < 0) {
		array_size = script_array_highest_key(st, sd, reference_getname(data), reference_getref(data));
	}

	// Start shuffling the array
	if (is_string_variable(name)) {
		for (i = array_size - 1; i > 0; i--) {
			j = rnd() % (i + 1);

			const char* temp_val = get_val2_str(st, reference_uid(id, i), reference_getref(data));
			set_reg_str(st, sd, reference_uid(id, i), name, get_val2_str(st, reference_uid(id, j), reference_getref(data)), reference_getref(data));
			set_reg_str(st, sd, reference_uid(id, j), name, temp_val, reference_getref(data));
			script_removetop(st, -1, 0);
			script_removetop(st, -1, 0);
		}
	}
	else {
		for (i = array_size - 1; i > 0; i--) {
			j = rnd() % (i + 1);

			int64 temp_val = get_val2_num(st, reference_uid(id, i), reference_getref(data));
			set_reg_num(st, sd, reference_uid(id, i), name, get_val2_num(st, reference_uid(id, j), reference_getref(data)), reference_getref(data));
			set_reg_num(st, sd, reference_uid(id, j), name, temp_val, reference_getref(data));
			script_removetop(st, -1, 0);
			script_removetop(st, -1, 0);
		}
	}

	return SCRIPT_CMD_SUCCESS;
}

Then you can simply code it like this: 

1@thts,0,0,0	script	#thanatos_main	-1,{
OnInit:
	setarray .@rng_floors, 3, 4, 5, 6;
	shufflearray .@rng_floors;
	setarray 'floors, 1, 2, .@rng_floors[0], .@rng_floors[1], .@rng_floors[2], .@rng_floors[3], 7, 8;
	setarray 'maps$,
		instance_mapname("1@thts"),
		instance_mapname("2@thts"),
		instance_mapname("3@thts"),
		instance_mapname("4@thts"),
		instance_mapname("5@thts"),
		instance_mapname("6@thts"),
		instance_mapname("7@thts"),
		instance_mapname("8@thts");
	
	setarray 'coords_coords,
		0, 0,
		0, 0,
		27, 44,	// 3rd floor
		18, 97,
		155, 100,
		50, 18,
		50, 18,
		50, 18;
	
	
	// other stuff here...
	end;
}

1@thts,32,166,0	script	#setp02	45,2,2,{
	end;
OnTouch:
	.@next_floor = 3;
	warp 'maps$[.@next_floor], 'coords_coords[2 * .@next_floor + 0], 'coords_coords[2 * .@next_floor + 1];
	end;
}

As you're clearly implementing Thanatos Tower, you might find some inspiration from when I wrote the script (though it uses quite a few custom script functions and it also has a custom hard mode, but it can probably still be of use). It's from kRO replay files, so the NPC coordinates should be very accurate.

 

thanatos.txt

Edited by Tokei
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InfectedX Poporing

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Posted

Wow, i'll try the first option, Thank you...

Yeah, it's a bit hard to read 😅 but anyway, it gave me that error above... idk why, I just tried to script it like in kind of JS style lol.

maybe rathena didin't recognize the syntaxis...

I'll keep you updated in any case...

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Posted (edited)
6 hours ago, Tokei said:

 

As you're clearly implementing Thanatos Tower, you might find some inspiration from when I wrote the script (though it uses quite a few custom script functions and it also has a custom hard mode, but it can probably still be of use). It's from kRO replay files, so the NPC coordinates should be very accurate.

 

thanatos.txt 109.37 kB · 2 downloads

This script is not working for me i tried to check what's different and yes, it is very different XD

Has a lot of functions i don't have, but it could help... thx a lot... I still no success XD but i will keep trying... if i ever find a solution, i'll share...

PS: Sorry!!! i think i click on edit, it wasn't my intention to make double post!

Edited by InfectedX
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Tokei Garling

Tokei

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Posted
9 hours ago, InfectedX said:

This script is not working for me i tried to check what's different and yes, it is very different XD

Has a lot of functions i don't have, but it could help... thx a lot... I still no success XD but i will keep trying... if i ever find a solution, i'll share...

PS: Sorry!!! i think i click on edit, it wasn't my intention to make double post!

Ah no, the script I posted isn't meant to just copy paste and run. It's just if you have doubts with a mechanic or something; it's way too custom to be used and I'm too lazy to convert it to rAthena's standards.

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Posted
10 hours ago, Tokei said:

Ah no, the script I posted isn't meant to just copy paste and run. It's just if you have doubts with a mechanic or something; it's way too custom to be used and I'm too lazy to convert it to rAthena's standards.

right, thx 🙂 it's helpful anyway

 

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Posted
10 hours ago, Outlook said:

Error me too same like this

I think because after update

https://github.com/rathena/rathena/commit/7c153416bc2b69bbb515c0a3e7a90bcb216d5e4a

Script error after update

.@npc_size = rand(0, 0);

i'm not sure just i think.

That's a different issue though; rand(0, 0) doesn't make sense. You could edit the BUILDIN function to ignore such a case, since one could argue that rand(0, 0) should return 0. In the original script posted by InfectedX, it was impossible to have such a scenario so the error didn't make sense. That's why I suggested him to use an entirely different method instead.

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Posted (edited)

I see... Well as you said, I used that script to make a Thanatos tower revamped xD but if 2 of us are having this error... Then it's a bit hard to know why... Because logically is correct but idk why Rathena didn't get it... Anyway, I have 1 week working on this code... I hope I'll fix it soon 

Edited by InfectedX
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