※ Q&A/Problem Thread 5 ※ for OLD Danmakufu version (0.12m)

[Husky]

Hi... Well I'm new here D:. I've known this forum for long time since, but never registered until now. First, english is not my principal language so if you see some errors, sorry D:.

Wel... I'm here because I'm making a stage, so I made it, I'm at the boss part and I wanted to make a dialogue. I made it, but it crashes... I've tried everything so I hope you can help me t.t. Here is the dialogue code. It crashes just when it ends...

http://pastebin.com/BaMdLe6b

So what am I doing bad?

Welcome to the forum, also please use pastebin when posting big code. --Hele

[Ozzy]

Hi... Well I'm new here D:. I've known this forum for long time since, but never registered until now. First, english is not my principal language so if you see some errors, sorry D:.

Wel... I'm here because I'm making a stage, so I made it, I'm at the boss part and I wanted to make a dialogue. I made it, but it crashes... I've tried everything so I hope you can help me t.t. Here is the dialogue code. It crashes just when it ends...

So what am I doing bad?

Well first off, I suggest putting large blocks of code like that into pastebin links in the future. It's kind of a rule here.

As for your problem, I believe it's caused by the fact that your script calls GetEventStep while an event isn't running, which causes a crash immediately for some reason. Doing something like this for when you call it should fix the problem:

Code: [Select]

if(OnEvent == true) {
if(GetEventStep == 1) { DoStuff; }
}

With this, the program should only call GetEventStep when it's ok to do so.

[MMX]

I want to track if two moving straight lasers intersect, and if they do - get the coordinates of intersection. I know that it could be easily calculated cause object lasers always offer coordinates of both endpoints. The problem is how to organize laser per laser comparsion when there are a lot of them at the same time, as every laser "lives on it's own" by an instance of the same task Do i need to store a dynamic array containing coordinates of all lasers present at the moment or something?

[Ginko]

either that or create your objects outside your task.

[MMX]

either that or create your objects outside your task.

Hmm.. how do i manage them then? I always imagined that if i need some uncertain ammount of dynamic objects (that need some processing, not just creation) it should be done through calling every new object as an instance of a task. It's easy and flexible for all kind of objects from bullets to menus. And how could it be done without tasking? Through an array of objects? :wat:

[Ginko]

Either that or just be exhaustive. I dunno how many lasers at a time you need, though.

And just go to ph3, man.

[MMX]

And just go to ph3, man.

I heard that in ph3 objects are objects and you can retreive any of their data when you want. But how a swarm of independent objects could be managed there?

[Blargel]

Best answer I can give to that is arrays or a task per object.

[Husky]

Hey, I wanted to say thanks for the answer and sorry about the code I didnt know I had to use pastebin D:. Well it worked so thanks again ^^

[MMX]

Ok. I'll try to do it with array of coordinates. But i've got another question. If i use erase command to remove a certain entry from array, does that mean all entries after it will get their indexes decreased? This totally breaks the plan, cause task must keep the correct index of an array cell it refers to. The only other way to manage an uncertain "cloud" of objects that comes in mind is common data, wich is ridiculous, but might work (it works well for processing power items, but that was in case of necessity of data exchange between the scripts).

[Ginko]

Uh well instead of erasing that entry, just overwrite it then ...

[MMX]

Uh well instead of erasing that entry, just overwrite it then ...

Wat? U seem not getting the process i want to perform. Imagine i have a bunch of lasers flying and an array containing coordinates of all their endpoints. Each laser refers to a certain cell of that array and it's task updates the value until laser is gone. What do i need to do when laser is gone and it's cell is not in use? How could i overwrite it, or i mean how new instances of task for new lasers spawned could know about any unused cells? That sounds too complicated for such an easy goal. I think i'll try to use common data for it...Wait a minute... there will be the some problems too, cause that power items routine i made does just the opposite i want here. But screw it, i'll try anyway :colonveeplusalpha:

[Drake]

Use null/default values. I did this exact technique in the pixel contest, and although my entry was awful, it's basically what you're trying to do.

[Ginko]

Like Drake says, overwrite it with an arbitrary default value, like (-1000), and check if your value is (-1000) before doing your stuff.

[MMX]

Use null/default values. I did this exact technique in the pixel contest, and although my entry was awful, it's basically what you're trying to do.

Hmm.. You mean just "forget" those unused cells so array will grow with every new entry no matter of how many of them actually are? I think it will work since there will be not very much lasers spawned during the spellcard i'm working on, though it's such a waste.

Also, speaking of danmakufu contests. Will there be any new ones? Noone happened since i've joined MoTK but i want to participate so much :3

[Ginko]

Uh well no you don't *have to* always expand your array, you can just overwrite the unused indexes, especially if you know the maximal number of array at a time.

[MMX]

Uh well no you don't *have to* always expand your array, you can just overwrite the unused indexes,

But to find if there is any unused cell i have to parse the array from the beginning? Well it's not a big problem when array isnt really big. Thanks for advices, though, as i said before, i'll try "fake common data indexing" first, cause deleting an entry from CD doesnt affect the rest. It only will return "No data" on next parse.

especially if you know the maximal number of array at a time.

Do you mean length function?

[Blargel]

Instead of storing the coordinates in the array, store the object ids. You can grab the coordinates from the object ids. That way you don't need to constantly update the array, nor do you need to worry about which index belongs to what object. You can then use the erase function without worrying about the indexes.

[MMX]

Instead of storing the coordinates in the array, store the object ids. You can grab the coordinates from the object ids. That way you don't need to constantly update the array, nor do you need to worry about which index belongs to what object. You can then use the erase function without worrying about the indexes.

Oh geez! Why havent i thought about it? So an object can actually "put" itself into array? like

Code: [Select]

array=array~[obj];

How do i need to define the array first then? like

Code: [Select]

let tmp=Obj_Create(OBJ_LASER);
let array=[tmp];

Oh shi-- tried just now and it works! Thanks a lot, that was the best idea ever  :*


So now my task looks like that

Code: [Select]

task Laser(x,y,aim){
let obj=Obj_Create(OBJ_LASER);
lasers=lasers~[obj];
let laserid=length(lasers)-1;

  *  *  *

Obj_Delete(obj);
erase(lasers,laserid);
}
Hmm.. But calling erase function doesnt affect array length for some reason :wat:

[Azure Lazuline]

lasers = erase(lasers, laserid)

[MMX]

lasers = erase(lasers, laserid)

Yeah already fixed this :facepalm: It works now, but causes an error sometimes and crashes danmakufu. I smell erase decreases length of an array causing other later erases go out of bounds :qq:

Oh well. I've got it. Looks like i dont need to erase an array entry from the task, but while parsing it for laser data comparsion. Just one question: what will array cell contain when i call Obj_Delete in task? NULL? Screw this. I forgot about  Obj_BeDeleted function.

But damn again it causes error 126 and crashes danmakufu. Here's the task testing this

Code: [Select]

task ParseLasers{
let num=0;
loop{
num=length(lasers);
if (num>1){
ascent(i in 1..num){
if(Obj_BeDeleted(lasers[i])){
lasers=erase(lasers,i);
num--;
}
}
}
yield;
}
}
I'm curious, does decreasing of num affect ascent, or should i use while?
UPD: Just as planned! Replacing ascent (i in 1..num) with while (i<num) fixes the problem. Maaan, make another note on danmakufu weird bugs list
Oh and it's so fun to answer own questions in the thread yourself

[Drake]

Why did you not actually look at my entry like I advised instead of asking all these questions that would have been answered by looking at my entry.

[Blargel]

Yeah already fixed this :facepalm: It works now, but causes an error sometimes and crashes danmakufu. I smell erase decreases length of an array causing other later erases go out of bounds :qq:

Oh well. I've got it. Looks like i dont need to erase an array entry from the task, but while parsing it for laser data comparsion. Just one question: what will array cell contain when i call Obj_Delete in task? NULL?

It will be unaffected. You aren't storing the object in the array, you're storing a number that identifies the object, thus why I refer to it as an object id. When the object is deleted, the id is still stored in the array. Any attempt to use that id won't cause any errors, but won't return any meaningful information either. Instead of using erase(lasers,laserid); at the end of your task, which actually causes major problems, you can call Obj_BeDeleted on each element in the array before grabbing the coordinates. If it has been deleted, go ahead and erase it.

As a sidebar, if you do plan to erase elements in an array, make sure you are iterating through the array with descent instead of ascent. If you want to know why, imagine this scenario.

Code: [Select]

array = [0, 1, 2, 3, 4 ,5]
ascent(i in 0..length(array)){
    if(i == 3){
        array = erase(array, i);
    }
    let blah = i;
}
This would raise an error. Why? Because when i goes from 0 to 5 in order, array[5] no longer exists by the time it gets to the last iteration of the ascent loop. Incidentally, this also causes it to skip over an element in the array. However, if you replace ascent with descent, it'll start with the last element first, which definitely will not be deleted already. It also will not skip over anything anymore.

[MMX]

Why did you not actually look at my entry like I advised instead of asking all these questions that would have been answered by looking at my entry.

Because Blargel posted a more interesting idea. Thanks for your advice too
Well guys'n'gals. Seems like it works like it should for now so i wont flood the thread until some new shit happens.

And again big thanks for all suggestions and answers, it helped me a lot

[MMX]

This would raise an error. Why? Because when i goes from 0 to 5 in order, array[5] no longer exists by the time it gets to the last iteration of the ascent loop. Incidentally, this also causes it to skip over an element in the array. However, if you replace ascent with descent, it'll start with the last element first, which definitely will not be deleted already. It also will not skip over anything anymore.

Not only on the last but on every iteration. Looks like ascent limits get fixed once it's called. So yeah, descent or while cycles are needed for this.

Fuck. Doublepost. Moderators, please merge or delete this nonsense :fail:

[LupusTheWolf]

I have a question for Danmakufu 0.12
Let's say I have a script for a Spellcard. I can run it, but only if I input either REIMU or MARISA in the #PLAYER selection stuff in the script. If I put FREE, Danmakufu suddenly shut down with no message. So in shorts, I cannot use custom player script. How do I fix these kind of problem? I guess that I haven't modify something yet in Danmakufu after I installed it but i don't know. And it's worse when I need to run a full-bossfight script. I cannot play it at all.
PS: Yes, the custom player script is still in the Player folder. So I think the problem came from
Sorry, it's hard to word all of these problems easily. English isn't really my native languege. Let's just say I cannot run bossfight-script at all since Danmakufu just suddenly shut down when I select the boss-script.
Thanks for replying.

[MMX]

If I put FREE, Danmakufu suddenly shut down with no message.

That's weird. Try to reinstall danmakufu and be sure to run it through applocale.


Meanwhile: The script with intersecting lasers i was asking before is complete and works well. Though i've noticed one thing - it causes massive memory leak. Through method of exclusion i've found that it's caused by array concatenation

Code: [Select]

lasers=lasers~[obj];Even when i erase unused cells and reset array on every new wave it keeps eating megabytes like it's no thing. And dnh doesnt free them away after script ends, so it may cause some HUEG memory invasion after lots of restarts.
So i dunno, am i doing something wrong, or it's just common way danmakufu works with arrays?

[xForeverFanaticx]

How would one make a curvy laser-esque player shot? ._." If it's even possible.

[MMX]

How would one make a curvy laser-esque player shot? ._." If it's even possible.

Yes, it's possible. Use Obj_Create(OBJ_SINUATE_LASER)and then process it with proper functions

[Drake]

I have a question for Danmakufu 0.12
Let's say I have a script for a Spellcard. I can run it, but only if I input either REIMU or MARISA in the #PLAYER selection stuff in the script. If I put FREE, Danmakufu suddenly shut down with no message. So in shorts, I cannot use custom player script. How do I fix these kind of problem? I guess that I haven't modify something yet in Danmakufu after I installed it but i don't know. And it's worse when I need to run a full-bossfight script. I cannot play it at all.

The problem is likely that you aren't running Danmakufu under Japanese locale, and it's trying to read japanese characters from the Rumia scripts, but it can't.

Please go through these steps.
http://www.shrinemaiden.org/forum/index.php/topic,4138.0.html