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

[Drake]

script_enemy_main{
- includes and variable inits
- script events
- SanaeTask{}
- Moriyashot{
-- ascent{
--- ascent{
--- }
-- }
- }
- loop{
-- ascent{
-- }
- }
} // end of script_enemy_main
setmovepositions
} // -1 brackets
} // -2 brackets
wait{ loop{} }
} // -3 brackets
} // -4 brackets

[TraceTheKriken]

Few questions:
1. How do I aim bullets to playfield center
2. If I create LaserA, LaserB or LaserC cetrain radius of the enemy:

Code: [Select]

CreateLaserA(1, GetEnemyX+25*cos(dir), GetEnemyY+25*sin(dir), 25);and then change angular velocity in SetLaserDataA, does the laser rotate around the point it was created or aroung the boss with the given radius (25 pixels in this case)

[Drake]

1. How do I aim bullets to playfield center

atan((240 - bullety) / (224 - bulletx)); or atan2(240 - bullety, 224 - bulletx);

2. If I create LaserA, LaserB or LaserC cetrain radius of the enemy:

Code: [Select]

CreateLaserA(1, GetEnemyX+25*cos(dir), GetEnemyY+25*sin(dir), 25);and then change angular velocity in SetLaserDataA, does the laser rotate around the point it was created or aroung the boss with the given radius (25 pixels in this case)

The laser fires from that point at the angle you specify but it turns at the angvel you specify, so probably "rotate around the point it was created"; but with careful angle planning you can get it to rotate around the boss.

[Yukari-Chan]

script_enemy_main{
- includes and variable inits
- script events
- SanaeTask{}
- Moriyashot{
-- ascent{
--- ascent{
--- }
-- }
- }
- loop{
-- ascent{
-- }
- }
} // end of script_enemy_main
setmovepositions
} // -1 brackets
} // -2 brackets
wait{ loop{} }
} // -3 brackets
} // -4 brackets

Oh. What the fuck have I just done. Guess I'll go correct it.

[TraceTheKriken]

Okay then, how do I "kill" (delete and respawn later with sub spawn) a familiar

[Helepolis]

Okay then, how do I "kill" (delete and respawn later with sub spawn) a familiar

There were two ways.

The first one by giving it SetLife(-5000) or similar, however I believe this counts as a player score, and will add score. The 2nd method without the negative life I forgot and hoping someone can refresh both our memories.

[Azure Lazuline]

VanishEnemy will delete the enemy without any additional effects (no score, no explosion).

[Helepolis]

VanishEnemy will delete the enemy without any additional effects (no score, no explosion).

* Helepolis slaps face

And how could I ever forget about that simple function. ORZ

[☆ Hinalyte]

INCOMING PROBLEM!!!this must be fit in here, oh well

Here it goes:

http://i314.photobucket.com/albums/ll403/jed9876/Touhou/tojiko_trans.png

So basically, I have a coloring problem. Looks like the 0,0,0 RGB value is transparent on danmakufu. Not just Tojiko, it also includes the shoes of other characters as well. :V
How can I fix this?(using GIMP to recolor it is a mess, it catches the other colors.)

Thanks in advance(derp)

looks like I found a solution on this by myself. I just have to adjust its brightness by 1. Oh silly me.

Anyway, how can I make those . . . what should I call on those. . . timed shots? Something like on Futo's 3rd nonspell, most of Orin's nonspells, and etc.

[Chronojet ⚙ Dragon]

[18:43:16] <HyperMario> you see, the last bullet becomes the first one to move
[18:43:24] <Kyuu> CreateShotA
[18:43:39] <Kyuu> SetShotDataA(id, frametomanipulate, speed, angle.......
[18:43:46] <Kyuu> You would want to play around with frametomanipulate
[18:44:16] <HyperMario> might need a bombard of SetShotDataA's, I guess
[18:44:39] <Kyuu> Certainly it's easy to make.
[18:44:44] <Kyuu> Come to #danmakufu why don't you sometime
[18:45:17] <HyperMario> there's no people in there
[18:45:24] <Kyuu> on ppirc
[18:45:31] <HyperMario> oh
[18:45:43] <Kyuu> it's better than #gensokyo lol
[18:45:52] <HyperMario> maybe I should wait for the answer on the forums
[18:45:56] <Kyuu> i tell you
[18:46:01] <Kyuu> it's setshotdataa
[18:46:18] <HyperMario> I know
[18:46:26] <HyperMario> but I want to reverse the frame
[18:46:30] <Kyuu> uh
[18:46:43] <Kyuu> just have frametomanipulate be lower number every time you shoot
[18:46:58] <HyperMario> as in ascent?
[18:47:10] <Kyuu> suuuuuuuuure
[18:47:15] <Kyuu> lemme try it
[18:47:28] <HyperMario> ok
[18:49:01] <Kyuu> let time = 240;
[18:49:01] <Kyuu> loop(15) {
[18:49:01] <Kyuu>    CreateShotA(0, GetX, GetY, 10);
[18:49:01] <Kyuu>    SetShotDataA(0, 0, 4, GetAngleToPlayer, 0, -4/30, 0, BLUE21);
[18:49:01] <Kyuu>    SetShotDataA(0, time, 0, NULL, 0, 2/45, 2, RED21);
[18:49:01] <Kyuu>    FireShot(0);
[18:49:01] <Kyuu>    time-=15; loop(10){yield;}
[18:49:01] <Kyuu> }
[18:49:02] <Kyuu> try this
[18:49:05] <Kyuu> i didn't test it yet
[18:51:27] <HyperMario> oh cool
[18:51:30] <HyperMario> thanks

[Drake]

Futo's 3rd nonspell (well, all her nonspells) is basically

ascent(i in 0..number_of_rings){    //
    ascent(j in 0..(360/bullets_in_ring)){
        CreateShotA(0, x, y, delay);
        SetShotDataA(0, 0, speed, 360/j, 0, negative_accel, 0, graphic);
        SetShotDataA(0, frame, NULL, NULL, 0, positive_accel), maxspeed, othergraphic;
        FireShot(0);
    }
    loop(4){yield;}
}

but sometimes the bullets fired last come first which is just like maxwait-(i*frames) and stuff

[Rin Kaenbyou]

Futo's 3rd nonspell (well, all her nonspells) is basically

ascent(i in 0..number_of_rings){    //
    ascent(j in 0..(360/bullets_in_ring)){
        CreateShotA(0, x, y, delay);
        SetShotDataA(0, 0, speed, 360/j, 0, negative_accel, 0, graphic);
        SetShotDataA(0, frame, NULL, NULL, 0, positive_accel), maxspeed, othergraphic;
        FireShot(0);
    }
    loop(4){yield;}
}

but sometimes the bullets fired last come first which is just like maxwait-(i*frames) and stuff

I tried this but only shoots a wave (and is very ugly, doesnt look like the original)... I did something wrong

btw, how I can replicate the Futo 3rd spellcard... the one of the fire? "xxxxxxxx in flames" or something ... looks hard to make

Also, how I can make the Miko's spellcard: Secret Treasure "Armillary Sphere of Ikaruga-dera"? do not even know where to start ^^U

[Ginko]

btw, how I can replicate the Futo 3rd spellcard... the one of the fire? "xxxxxxxx in flames" or something ... looks hard to make

Also, how I can make the Miko's spellcard: Secret Treasure "Armillary Sphere of Ikaruga-dera"? do not even know where to start ^^U

Try to understand this if you can for Futo's nonspells (just calling the Shots task, assuming 250 is the id graphic for an arrow) : Corresponding Video
It won't work for you though since it's ph3, but you should be able to understand the task.

Code: [Select]

task Shots{
let a=0;
loop(120){yield;}
loop{
ascent(k in 0..12){ascent(i in 0..20){CustomShotC(GetX,GetY,5,a+360/20*i,-0.08,0,90,0.03,3,0,250);}a=a+0.30*(k+4);loop(5){yield;}}
loop(180){yield}
ascent(k in 0..24){ascent(i in 0..20){CustomShotC(GetX,GetY,5,a+360/20*i,-0.08,0,90,0.03,3,0,250);}a=a+0.40*(k+4);loop(5){yield;}}
loop(180){yield}
ascent(k in 0..12){ascent(i in 0..20){CustomShotC(GetX,GetY,5,a+360/20*i,-0.08,0,150-10*k,0.03,3,0,250);}a=a+0.36*(k+4);loop(5){yield;}}
loop(240){yield}
}
}

task CustomShotC(x,y,s,a,ds,s2,delay,ds2,s3,da,g){
let obj=ObjShot_Create(OBJ_SHOT);
ObjMove_SetPosition(obj,x,y);
ObjShot_SetGraphic(obj,g);
ObjMove_SetAngle(obj,a);
ObjMove_SetSpeed(obj,s);
ObjShot_Regist(obj);
let t=0;
let ph=0;
while(GetLife>0 && !Obj_IsDeleted(obj)){
yield;
if((ds > 0 && ObjMove_GetSpeed(obj)>s2)||(ds < 0 && ObjMove_GetSpeed(obj)<s2)){
ObjMove_SetSpeed(obj,s2);loop(delay){yield;};
CreateShotA2(ObjMove_GetX(obj),ObjMove_GetY(obj),s2,a+da,ds2,s3,g,0);Obj_Delete(obj);
}
ObjMove_SetSpeed(obj,ObjMove_GetSpeed(obj)+ds);
}
Obj_Delete(obj);
}

Futo's  spellcard is very simple, the red fireballs are immobile at first, then accelerate in a random direction, and the yellow fireballs are immobile at first, then move in a increasing angle for each fireball in the column
All you need is a task with two parameters (graphics and angle) and one object shot.

Miko's fourth spellcard is also simple, just make object bullets for which you disable collision, then activate collision and change graphics, the movement is easier with position-controlled bullets.

[Drake]

I tried this but only shoots a wave (and is very ugly, doesnt look like the original)... I did something wrong

I would have been surprised if it had looked anything like the original. This is just the general format of her nonspells; all three of them are made using a similar format. Several rings of bullets fire in some increasing/decreasing offset angle, slow down to a stop, then start moving again, sometimes in a different order. That's all there is there.

[AkaoniP]

I have a question.
What return and break do?

[MMX]

I have a question.
What return and break do?

return returns a function value or ends the task. Break exits the loop (wait, loop, etc)

Corresponding Video

lololol Suwako shooting arrows :]

[Chronojet ⚙ Dragon]

return returns a function value or ends the task.

There are two versions of return.

function funcname(parameters) { dostuff; return value1; }
This does whatever dostuff; does, and then gives a return value of value1. So you can use the above code for things like:
let variable = funcname(parameters);

return when used in like a task: return;
You can use it to exit out of a loop, like break.


Also, ScarletKnives,

Code: (Ginko hates v0.12m so here's a v0.12m version of his ph3 code) [Select]

task Shots{
let a=0;
SetMovePosition02(GetCenterX, GetCenterY/2, 75);
loop(120){yield;}
loop {
ascent(k in 0..12){ascent(i in 0..20){CustomShotC(GetX,GetY,5,a+360/20*i,-0.08,0,90,0.03,3,0,BLUE21);}a=a+0.30*(k+4);loop(5){yield;}}
loop(180){yield}
ascent(k in 0..24){ascent(i in 0..20){CustomShotC(GetX,GetY,5,a+360/20*i,-0.08,0,90,0.03,3,0,BLUE21);}a=a+0.40*(k+4);loop(5){yield;}}
loop(180){yield}
ascent(k in 0..12){ascent(i in 0..20){CustomShotC(GetX,GetY,5,a+360/20*i,-0.08,0,150-10*k,0.03,3,0,BLUE21);}a=a+0.36*(k+4);loop(5){yield;}}
loop(240){yield}
}
}

task CustomShotC(x,y,s,a,ds,s2,delay,ds2,s3,da,g){
let obj=Obj_Create(OBJ_SHOT);
Obj_SetPosition(obj,x,y);
ObjShot_SetGraphic(obj,g);
Obj_SetAngle(obj,a);
Obj_SetSpeed(obj,s);
let t=0;
let ph=0;
while(!Obj_BeDeleted(obj)){
yield;
if((ds > 0 && Obj_GetSpeed(obj)>s2)||(ds < 0 && Obj_GetSpeed(obj)<s2)){
Obj_SetSpeed(obj,s2); loop(delay){yield;}
CreateShot02(Obj_GetX(obj),Obj_GetY(obj),s2,a+da,ds2,s3,g,0); Obj_Delete(obj);
}
Obj_SetSpeed(obj,Obj_GetSpeed(obj)+ds);
}
}


[Sammythebat]

I forgot the formula for calculating radius, for example I'd need it to check if an item is within a radius surrounding the character so that the item will be automatically auto route to the player.

I was wondering if anyone else uses or remembers the radius/circle collission detection formula

[Drake]

Common method is just checking distance, which naturally equates to a radius.

((oy-py)^2 + (ox-px)^2) < (distance^2)

of course there are methods to speed this stuff up though but yeah

[☆ Hinalyte]

Is there a way on how to play 2 sounds?

Let's say: PlaySE(Laser) will play Laser1 and Laser2

is that possible?

[JmLyan]

Is there a way on how to play 2 sounds?

Let's say: PlaySE(Laser) will play Laser1 and Laser2

is that possible?

Why not just play them at the same time?

[Ginko]

Or just create a function ...

[Sammythebat]

Is there a way to create gravity bullets using CreateShot02? I remember seeing something like that a long time ago. It's that my stage 3 boss's gimmick bullets make heavy use of gravity bullets when they explode.

[MMX]

Is there a way to create gravity bullets using CreateShot02? I remember seeing something like that a long time ago. It's that my stage 3 boss's gimmick bullets make heavy use of gravity bullets when they explode.

here i've answered the same question. And here is a test script i made.

[Koishi Komeiji]

What does ceil do? Just wondering.

[Naut]

Rounds up always.

ceil(1.7) = 2
ceil(1) = 1
ceil(1.1) = 2

[Koishi Komeiji]

Thanks, Naut!

[TheTeff007]

How to replicate the effect of Yukari's "Border between Humans and Youkai"?

At the Final Phase, all the lasers close towards the player. I want to do the same.

My current code is this:

Code: [Select]

let dir = 0;
let dir2 = 0;
let dir3 = 180;

wait(60);

loop
{
CreateShot01(GetX + dir3 * cos(dir), GetY + dir3 * sin(dir), 1, dir - 180, 14, 10);
CreateShot01(GetX - dir3 * cos(dir), GetY - dir3 * sin(dir), 1, dir - 180, 14, 10);
CreateShot01(GetX + dir3 * cos(dir2), GetY + dir3 * sin(dir2), 1, dir2 - 180, 14, 10);
CreateShot01(GetX - dir3 * cos(dir2), GetY - dir3 * sin(dir2), 1, dir2 - 180, 14, 10);
dir++;
dir2--;
dir3--;
wait(1);
}

Code may be wrong, as I type this from memory

[xForeverFanaticx]

Quick question on reflecting things: How would you reflect objects in a circle? As in, if a circle's center is on point X and Y, and an object bullet reached a certain distance R from the center point, what's the basic formula for bouncing them? I know that on the vertical walls it's 180-angle, while it's 360-angle for the horizontal walls... :\

<><><><>360<><><><>
 180<><><><><><>180
<><><><>360<><><><>

...180 between each 90 degree increment :\

set angle to Angle-Bullet, where Angle is the angle from X and Y, and Bullet is the trajectory of the bullet?

only i'd have to change Angle to accomodate the formula? like, Angle=2*(Angle-180)+180?

...I'm testing this on paper as I'm typing it, and it looks promising :\ Dunno yet. What I has is:

let Bullet=Obj_GetAngle(obj); //(irrelevant in real script situations probably, just using it for simpler show)
let Angle=atan2(Obj_GetY(obj)-GetCenterY,Obj_GetX(obj)-GetCenterX);
Angle=2*(Angle-180)+180; //(this is how I'm thinking of accommodating the angle calculation thing, where its 360 up and down, and 180 left and right)
SetAngle(obj,Angle-Bullet); //(final thing, basically how a reflected angle is determined)

Starting to think asking this was redundant since I've probably figured it out by now. Oh well. Test it in the morning I guess...

Another thing, I've been thinking about the hitbox thing endlessly again, and I still don't see how a bubble bullet can have such a small hitbox compared to the sprite when it was stated that a custom sprite's hitbox radius is about 1/2 to 1/3 of the rectangle's smallest dimension. If you put the borders right up close to the bubble's edges, that would make the sprite almost all hitbox, right? And if it were larger, wouldn't it make it larger than the sprite itself? Or am I confusing myself...? O.o

[Ginko]

Another thing, I've been thinking about the hitbox thing endlessly again, and I still don't see how a bubble bullet can have such a small hitbox compared to the sprite when it was stated that a custom sprite's hitbox radius is about 1/2 to 1/3 of the rectangle's smallest dimension. If you put the borders right up close to the bubble's edges, that would make the sprite almost all hitbox, right? And if it were larger, wouldn't it make it larger than the sprite itself? Or am I confusing myself...? O.o

Yeah, it's not the radius but the diameter. If your bullet definition borders match the sprite's borders, only half the radius of the bullet will be deadly.


If a bullet hits your circle at (X+R*cos(u),Y+R*sin(u)) and that bullet has angle v, it will bounce with angle 2*u-v.

You can put 2*(u-180)-v, or 2*(u-900)-v if you like that, though :?).