Danmakufu Q&A/Problem Thread v3

[Naut]

I'm afraid I don't follow, I gave you info... The spell, clearly doesn't show up. If the spell didn't show up when I chose it, I would have said so, if that's what you meant.

You didn't give us anything. There are many reasons for many problems, telling us only the problem without any other information is very unhelpful. If you can't relay anything else, your best bet it to just post the script along with a brief description of your problem, as well as any possible solutions you may have already tried. Like Drake said, we can "best guess" the problem due to other people running into similar obstacles (and the very likely mistakes they made), but once you get better at scripting your problems will become more elaborate and we won't be able to guess it based off of your coding skill as we perceive it.

The best way to receive help is to post your script.

[Suikama]

Goddammit adding any comments gives me a script_enemy_main error WHY DO YOU DO THIS TO ME

Code: [Select]

#TouhouDanmakufu
#Title[Hibachi]
#Player[FREE]
#ScriptVersion[2]

script_enemy_main
{
let frame = 0;
let attack = 5;

@Initialize
{
LoadUserShotData(GetCurrentScriptDirectory ~ "supershot\supershot.txt");
SetLife(18000);
SetInvincibility(60);
MagicCircle(false);
SetRateScoreSystemEnable(false);
PlayMusic(GetCurrentScriptDirectory ~ "bgm\]-[_-34(#!.mp3");
SetMovePosition02(GetCenterX, GetCenterY - 120, 10);

}

@MainLoop
{
SetCollisionA(GetX, GetY, 32);
SetCollisionB(GetX, GetY, 16);
Bombimmunity;
if(GetLife<18000 && attack == 5)
{
pew;
attack = 6;
}
if(GetPlayerLife==1){SetLife(0);}

frame++;
yield;
}

@DrawLoop
{

}

@Finalize
{
}

function Wait(frames){loop(frames){yield;}}

task Bombimmunity
{
if(OnBomb)
{
SetDamageRate(0,0);
}
else
{
SetDamageRate(100, 0);
}
}

task pew
{
}

task pew2
{
ascent(j in 0..60)
{
ascent(i in 0..30)
{
CreateShot02(GetX+50*cos(i*360/30+j*4.5), GetY+50*sin(i*360/30+j*4.5), 4, i*360/30+j*4.5, -0.02, 2, PURPLE21, 10);
}
Wait(6);
}
Wait(30);
pew;
}
}

[空SoraのNo鏡Kagami]

You didn't give us anything. There are many reasons for many problems, telling us only the problem without any other information is very unhelpful. If you can't relay anything else, your best bet it to just post the script along with a brief description of your problem, as well as any possible solutions you may have already tried. Like Drake said, we can "best guess" the problem due to other people running into similar obstacles (and the very likely mistakes they made), but once you get better at scripting your problems will become more elaborate and we won't be able to guess it based off of your coding skill as we perceive it.

The best way to receive help is to post your script.

Well, the problem was me forgetting to put #TouhouDanmakufu...

[Drake]

There we go. That would have been solved nigh immediately if you had posted your script. Keep it in mind.

[Kylesky]

Code: [Select]

PlayMusic(GetCurrentScriptDirectory ~ "bgm]-[_-34(#!.mp3");


WTF IS THAT!?!?!? :yumemi:

[Drake]

http://www.youtube.com/watch?v=uYFmJxmMGYI

[Helepolis]

Had some inspiration and time to fool around with danmakufu, so I wanted to create a 12 sided TRIANGLEFAN magic circle. Now before everybody jumps the boat saying: DONT USE TRIANGLEFAN!!! USE STRIP. No, I need trianglefan here because the image I am using is not a strip like Fujiwara's circle tutorial.

Anyway, the vertex placing went smooth with some trig code ( /me brofists Drake & Naut ) but the UV placing is making me rage hard.

Code: [Select]

ObjEffect_SetPrimitiveType(obj, PRIMITIVE_TRIANGLEFAN);
ObjEffect_CreateVertex(obj, 13);

ObjEffect_SetVertexXY(obj, 0, 0, 0);

ascent(circx in 1..13){
ObjEffect_SetVertexXY(obj, circx, circsize*cos(circx*360/11), circsize*sin(circx*360/11));
ObjEffect_SetVertexUV(obj, circx, ????, ???);   // <------- ?????????????

}

Image used:

Basically, how do I set up the code for the UV ? =|

[Azure Lazuline]

No, I need trianglefan here because the image I am using is not a strip like Fujiwara's circle tutorial.
[...]
Basically, how do I set up the code for the UV ? =|

If you're not using the standard image, then nobody will know how to set up the vertices without seeing said image first.

[Helepolis]

If you're not using the standard image, then nobody will know how to set up the vertices without seeing said image first.

Rectangular image, 128x128. Forgot to add to my post. It is now added.

[Azure Lazuline]

Then the coordinates should be exactly the same for UV as they are for XY. Just use half the width of the image instead of the radius of the circle, and add half the width of the image to both sets of coordinates too:

Code: [Select]

   ascent(circx in 1..13){
      ObjEffect_SetVertexXY(obj, circx, circsize*cos(circx*360/11), circsize*sin(circx*360/11));
      ObjEffect_SetVertexUV(obj, circx, 64*cos(circx*360/11)+64, 64*sin(circx*360/11)+64);
     
   }


[8lue Wizard]

   ascent(circx in 1..13){
      ObjEffect_SetVertexXY(obj, circx, circsize*cos(circx*360/11), circsize*sin(circx*360/11));

typo?

[Helepolis]

Blue Basil, no it is not a typo. Else the circle won't close and leaves open a triangle.

Then the coordinates should be exactly the same for UV as they are for XY. Just use half the width of the image instead of the radius of the circle, and add half the width of the image to both sets of coordinates too:

Code: [Select]

   ascent(circx in 1..13){
      ObjEffect_SetVertexXY(obj, circx, circsize*cos(circx*360/11), circsize*sin(circx*360/11));
      ObjEffect_SetVertexUV(obj, circx, 64*cos(circx*360/11)+64, 64*sin(circx*360/11)+64);
     
   }


You are ace Azure. It worked. The only thing needed was setting ObjEffect_SetVertexUV(obj, 0, 64, 64); for the first vertex, else a small gap remained open.

Thank you =3

Question #2

New question regarding math and stuff. How do I pinpoint the angle towards the player using SetMovePosition? If I apply the "homing" code from Obj Bullets the Boss starts doing weird stuff. I basically want the boss to launch itself towards the player, but continue the angular path so it moves out of the screen. Basically it is like Marisa's Blazing Star

[Kylesky]

I basically want the boss to launch itself towards the player, but continue the angular path so it moves out of the screen. Basically it is like Marisa's Blazing Star

I tried to do that before... remember how boss/enemy scripts have SetSpeed and SetAngle?

Code: [Select]

task movement{
    SetAngle(GetAngleToPlayer);
    SetSpeed(3);
    while(GetX>GetClipMinX-30 && GetX<GetClipMaxX+30 && GetY>GetClipMinY-30 && GetY<GetClipMaxY+30){yield;}
    SetSpeed(0);
}
Change however you want...



Now for a question of my own :V

How would you detect if something's in an OVAL... circle's are easy with:

Code: [Select]

if(((x1-x2)^2+(y1-y2)^2)^0.5<=radius)but what about ovals? I'm guessing it also uses the distance function, but a value that changes depending on the length, width and angle of the oval will replace the radius...

[Naut]

Now for a question of my own :V

How would you detect if something's in an OVAL... circle's are easy with:

Code: [Select]

if(((x1-x2)^2+(y1-y2)^2)^0.5<=radius)but what about ovals? I'm guessing it also uses the distance function, but a value that changes depending on the length, width and angle of the oval will replace the radius...

This was just fucking painful. I tried out numerous prototype functions, like...

Code: [Select]

function EllipseCollision(x, y, c, d, r, s, angle, radius){
return
(s^2)(cos(angle)^2)(x^2) + (s^2)(sin(angle)^2)(y^2) - (s^2)(2)(x*cos(angle))(y*sin(angle)) - (s^2)(2)(x*c*cos(angle)) - (s^2)(2)(y*c*sin(angle)) + (s^2)(c^2) +
(r^2)(sin(angle)^2)(x^2) + (r^2)(cos(angle)^2)(y^2) + (r^2)(2)(x*cos(angle))(y*cos(angle)) - (r^2)(2)(y*d*cos(angle)) - (r^2)(2)(x*d*sin(angle)) + (r^2)(d^2) - (r^2)(d^2)
<= radius;
}
...or even...

Code: [Select]

function EllipseCollision(x, y, c, d, r, s, angle, radius){
let A = (s*s)*(cos(angle)*cos(angle)) + (r*r)*(sin(angle)*sin(angle));
let B = (s*s)*(sin(angle)*sin(angle)) + (r*r)*(cos(angle)*cos(angle));
let C = -2*((s*s)*(c*cos(angle)) + (r*r)*(d*sin(angle)));
let D = -2*((s*s)*(c*sin(angle)) + (r*r)*(d*cos(angle)));
let E = 2*((s*s)*(cos(angle)*sin(angle)) - (r*r)*(cos(angle)*sin(angle)));
let F = (s*s)*(c*c) + (r*r)*(d*d) - (r*r)*(s*s);

return A*x^2  + B*y^2  + C*x + D*y + E*x*y + F <= radius;
}
Only to find out something so fucking simple that I threw together after thinking about what we're trying to do for 30 seconds...

Code: [Select]

function EllipseCollision(x, y, c, d, r, s, angle){
return ((x-c)^2+(y-d)^2)^0.5 <= (|r*cos(angle) + s*sin(angle)|);
}
Actually works.

KILL ME NOW

[Kylesky]

KILL ME NOW

oh god :V

[Henry]

A question about the application of subdirectory.

For example, a SC script file "script\Testing\SCs\spellcard.txt" would like to use a file in "script\Testing\img\back.jpg".

From Naut I learnt that I could use .\\img\back.jpg,

however should the quotation marks be present like:

Code: [Select]

let background = ".\\img\back.jpg";
or it's omitted or any other detail since this is not working 

[Chronojet ⚙ Dragon]

A question about the application of subdirectory.

For example, a SC script file "script\Testing\SCs\spellcard.txt" would like to use a file in "script\Testing\img\back.jpg".

From Naut I learnt that I could use .\\img\back.jpg,

however should the quotation marks be present like:

Code: [Select]

let background = ".\\img\back.jpg";
or it's omitted or any other detail since this is not working 

I believe Danmakufu requires you to use the quotes.
Also, iirc it should be

Code: [Select]

let thisisastring = ".\..\..\img\back.jpg"

* Mewkyuu is probably wrong

EDIT: Hey look

[Henry]

What is the difference between . and .. ?  :ohdear:

Mukyuu?

[Kylesky]

What is the difference between .\ and ..\ ?  :ohdear:

. is same directory, while .. is previous/outer directory

[Chronojet ⚙ Dragon]

Mukyuu?

Henry is correct.

Also, Mewkyuu is the name I go by on these forums.

[Henry]

Haven't realized...

Btw, is .\..\ equivalent to ..\ then?

Since I thought "..\test.txt" is equivalent to ".\test.txt"...

[Azure Lazuline]

.\ is the same thing as using GetCurrentScriptDirectory, while ..\moves up one directory. They are completely different things. If your script is script\test\Spell.txt and you want to access script\test\image.png, you would just use ".\image.png" as the path. If you want to access script\img\image.txt however, you will need to use ".\..\img\image.png".

Edit: using just "..\img\image.png" is completely wrong, as well as not using .\ or GetCurrentScriptDirectory at the beginning. Just don't do it.

[Helepolis]

I tried to do that before... remember how boss/enemy scripts have SetSpeed and SetAngle?

Code: [Select]

task movement{
    SetAngle(GetAngleToPlayer);
    SetSpeed(3);
    while(GetX>GetClipMinX-30 && GetX<GetClipMaxX+30 && GetY>GetClipMinY-30 && GetY<GetClipMaxY+30){yield;}
    SetSpeed(0);
}
Change however you want...

You will never believe it but I totally never knew SetAngle was usable for bosses. I feel so stupid. (  '.')b Thanks. 

[Henry]

I've heard if a file is referenced like this:

**in script\testing\SC\1.txt**
A line: #include_function ".\..\func\draw.txt"

The relative directories in draw.txt will switch to those of 1.txt, right?

[Kylesky]

You will never believe it but I totally never knew SetAngle was usable for bosses. I feel so stupid. (  '.')b Thanks.

:V

[Henry]

SetAngle is only applicable to bosses, right? :]
It's just like GetX and GetY for boss 

[Kylesky]

SetAngle is only applicable to bosses, right? :]
It's just like GetX and GetY for boss 

I think SetAngle works for enemies also...

GetX and GetY also works for both bosses and enemies...

[Henry]

I think SetAngle works for enemies also...

GetX and GetY also works for both bosses and enemies...

sigh...
I barely make scripts for enemies...
thank you for telling me 

[Kingault]

Whenever I insert this into my script:

Code: [Select]

if(frame==60){
            CreateShot01(GetX, GetY, 3, GetAngleToPlayer, RED01, 10);
            frame = 0;
        }
        frame++;

This happens:




I have gone through the Error Message Troubleshooting guide, but still no change.

Here is the entire @MainLoop part of the script:

Code: [Select]

@MainLoop {
        SetCollisionA(GetX, GetY, 32);
        SetCollisionB(GetX, GetY, 24);
        if(frame==60){
            CreateShot01(GetX, GetY, 3, GetAngleToPlayer, RED01, 10);
            frame = 0;
        }
        frame++;
    }


Please help. Thanks in advance.

[Demonbman]

These sort of things belong in the Q&A thread that we have in here.


But IOW your problem is likely because you havent defined Frame as a variable