[Chip]

I've just seen "modvar" on the wiki but not too sure exactly what it does.

Quote

modvar <gamevar> <value>
This command sets <gamevar> to <gamevar>%<value>. It's a math operation which calculates a modulus(aka reminder) of <gamevar>/<value>.

Is this some kind of "percentage" relating var - working out a percentage of a number?

[Ryan Cordell]

No, % is the symbol (in programming) for the MOD operator, that is, it returns only the remainder of the number. IE:

3%2 = 1
5%3 = 2 (*shrug*)
2%2 = 0

3%10 = 3
2%10 = 2

and such stuff. At least, that's what I remember from my programming classes. It's a bit foggy now though.
If I understand right, it simply performs that mathematical operation of the gamevar divided/modded by value.

[Chip]

Aww, I was hoping it would be a percentage work out.
Thanks for the info.

[XThX2]

I need help at making a projectile (actor based) going where the player looks. (Up/down wise) It has to do with the zvel of the actor I'm sure, that's where I get stuck. I couldn't make it use player's up/down angle to change it's zvel. (Used horiz)

		getplayer[THISACTOR].horiz horiz
		subvar horiz 100
		mulvar horiz -2048
		setactor[THISACTOR].z horiz

I used this because I read it hitscans where player looks , thought it could be useful. But it makes actors end up looking straight at the ground when I try to look down very slowly and vice versa.

Alternatively, if there's a way to make a projectile go through actors without making it an actor (I tried event_game but it didn't work, kept working like a projectile) I could use it too.

[Hendricks266]

I believe you need to set the zvel, not the z of the actor. You may also want to use zshoot.

[MIKE SIMS]

any tips for making a "health bar" HUD rather than the numeric health? or how to get the ammo on screen like I've seen in some mods (the shells)

[XThX2]

Well I used a hud like that. In my case, I had small gemstones lined up for both health and armor, and a pointer above the first gemstone.

Basically, I checked players health and placed them according to it, they won't display if their condition is false. You can, say put a health block per 5 health the player has. (Use DISPLAYREST event)

[Dr. Kylstein]

MIKE SIMS, on Jul 31 2009, 10:47 PM, said:

any tips for making a "health bar" HUD rather than the numeric health? or how to get the ammo on screen like I've seen in some mods (the shells)

How to make a health bar

[Danukem]

Dr. Kylstein, on Aug 1 2009, 08:59 AM, said:

Assuming HEALTHBAR is the name of a 2x16 tile:

gamevar temp 0 2
gamevar xvar 0 2
onevent EVENT_DISPLAYREST {
   setvar xvar 0 // set starting x coordinate
   getactor[THISACTOR].extra temp // get the player's health
   whilevarn temp 0 { // loop for each hitpoint
	   rotatesprite xvar 184 65536 0 HEALTHBAR 0 0 16 0 0 xdim ydim // draws HEALTHBAR at (xvar,184)
	   addvar xvar 2 // move to the right
	   subvar temp 1 // next hitpoint
   }
} endevent

Edit: this would be a rather large bar, however. You could "divvar temp <number>" before starting the loop to make each bar worth more points.
I might add a more thought-out version to the wiki later.

Yep, that's pretty much what I've been doing for bars in my mods (like the air left bar in DP that appears when you go under water without scuba gear, etc)

[MIKE SIMS]

Dr. Kylstein, on Aug 1 2009, 08:59 AM, said:

How to make a health bar

i love you (no homo) So I'm assuming a um.. Kill Counter would essentially work the same?

[Dr. Kylstein]

MIKE SIMS, on Aug 2 2009, 07:09 PM, said:

i love you (no homo) So I'm assuming a um.. Kill Counter would essentially work the same?

Any number you want. Just replace "getactor[THISACTOR].extra temp" and adjust BARSCALE as needed.

[Fox]

I am trying to make an projectile (RPG) hitscan what object it will hit. Although I am unable to discovery which value I should put as vertical angle.

As I could figure, to make an RPG have the same horizontal and vertical speed (an angle of 45º) the .zvel should be 16x the xvel. But this is as far as I could get... any help, please?

[Danukem]

Ilovefoxes, on Aug 4 2009, 10:42 AM, said:

I am trying to make an projectile (RPG) hitscan what object it will hit. Although I am unable to discovery which value I should put as vertical angle.

As I could figure, to make an RPG have the same horizontal and vertical speed (an angle of 45º) the .zvel should be 16x the xvel. But this is as far as I could get... any help, please?

Take the projectile's zvel and shift it 14 to the left for the hitscan parameter. I discovered that a few years ago and it seems to work fine.

[Fox]

Hah, thanks! It's quite easy, I see... =P And I was trying to understand how to make an arctan2.

[Fox]

I am trying to make an heat-seeking weapon... although every time I shoot two times and the first shot kill the enemy, the sprites is deleted and them the second shot has an invalid sprite ID. How does can I check if an ID actually exists as specific sprite?

[Dr. Kylstein]

Ilovefoxes, on Aug 5 2009, 10:38 AM, said:

I am trying to make an heat-seeking weapon... although every time I shoot two times and the first shot kill the enemy, the sprites is deleted and them the second shot has an invalid sprite ID. How does can I check if an ID actually exists as specific sprite?

Nonexistent sprites have a statnum of 1024, or so I heard.

[Danukem]

Dr. Kylstein, on Aug 5 2009, 08:35 AM, said:

Nonexistent sprites have a statnum of 1024, or so I heard.

Yup. It's also good to check for whether the target changed picnum, because sometimes one sprite will get deleted and then another one spawns with the same ID.

[m210®]

Is possible to make a non-projectile actor which will be reflected off walls as projectiles? ( PROJECTILE_FLAG_BOUNCESOFFWALLS 4 )
Somebody can help me with code?

[Danukem]

M210, on Aug 5 2009, 11:24 AM, said:

Is possible to make a non-projectile actor which will be reflected off walls as projectiles? ( PROJECTILE_FLAG_BOUNCESOFFWALLS 4 )
Somebody can help me with code?

It's possible, but I don't know the math for making it bounce correctly and I'm too lazy to look it up. If it were me I would just make it a projectile and add code to it in EVENT_GAME to make it do whatever it needs to do.

[Jimmy]

I noticed in my mod that the kick_hit sound will sometimes not play. I've searched through my code and there are absolutely no "stopsound kick_hit" commands anywhere. I'm puzzled as to what could cause this. Anyone have any ideas?

[m210®]

DeeperThought, on Aug 5 2009, 10:56 PM, said:

It's possible, but I don't know the math for making it bounce correctly and I'm too lazy to look it up. If it were me I would just make it a projectile and add code to it in EVENT_GAME to make it do whatever it needs to do.

I think is necessary to find ID of wall and a difference of angles between the actor and a wall(delta_fi). Before reflection to develop the actor on a angle equal

 reflang=actor_ang + 2[delta fi]

Can you help?

[Danukem]

M210, on Aug 5 2009, 12:29 PM, said:

I think is necessary to find ID of wall and a difference of angles between the actor and a wall(delta_fi). Before reflection to develop the actor on a angle equal

 reflang=actor_ang + 2[delta fi]

Can you help?

What you need to do is translate this function into CON code. Good luck!

Quote

static void A_DoProjectileBounce(int32_t i)
{
int32_t dax, day, daz = 4096;
spritetype *s = &sprite[i];
int32_t hitsect = s->sectnum;
int32_t k = sector[hitsect].wallptr;
int32_t l = wall[k].point2;

int32_t xvect = mulscale10(s->xvel,sintable[(s->ang+512)&2047]);
int32_t yvect = mulscale10(s->xvel,sintable[s->ang&2047]);
int32_t zvect = s->zvel;

int32_t daang = getangle(wall[l].x-wall[k].x,wall[l].y-wall[k].y);

if (s->z < (ActorExtra[i].floorz+ActorExtra[i].ceilingz)>>1)
k = sector[hitsect].ceilingheinum;
else
k = sector[hitsect].floorheinum;

dax = mulscale14(k,sintable[(daang)&2047]);
day = mulscale14(k,sintable[(daang+1536)&2047]);

k = xvect*dax+yvect*day+zvect*daz;
l = dax*dax+day*day+daz*daz;
if ((klabs(k)>>14) < l)
{
k = divscale17(k,l);
xvect -= mulscale16(dax,k);
yvect -= mulscale16(day,k);
zvect -= mulscale16(daz,k);
}

s->zvel = zvect;
s->xvel = ksqrt(dmulscale8(xvect,xvect,yvect,yvect));
s->ang = getangle(xvect,yvect);
}

[XThX2]

I almost understood what the code there does, but a few questions about the commands.

What exactly do,

*mulscale
*divscale
*ksqrt
*&
*wallptr

these do? I understood the math part, just the commands are bugging me.

[Hendricks266]

@Ilovefoxes:
arctan2 = getangle

@Captain Awesome:
Check the sound's priority, the third number in the definesound declaration.
definesound KICK_HIT kickhit.voc 0 0 4 0 0
By default it is set 4, really low. The maximum is 255. You may also want to increase the maximum number of voices in the sound setup. I believe TX recently upped it from 32 to 96.

@XThX2:
Check the wiki, my friend.

mulscale
divscale - There's no divscale command in the CONs; see mulscale.
ksqrt - Remember that in the source code, you can directly feed commands to other commands. So for ksqrt, it's just taking the square root of the mulscale command.
& - The only &'s in that code are "&sprite[i]" and "&2047". The first one I have no clue about, but it probably doesn't matter. The second one is only used with angles, probably because the only legal values for ang are between 0 and 2047, for 2048° of rotation.
wallptr - The first wall of a sector is where a wall hinges for slopes, and it also is used to check the statuses of all the walls in a sector.

[Fox]

LA, BIGORBIT and MOONSKY use an multiple images compound when the games runs. I am trying to change the sky pic in-game... although I can't get rid of this even if I change the .ceiningpicnum... any idea? I tryied dynamicremap already and didn't worked.

[lycanox]

I don't know if this is a bug in Eduke or just bad coding.

But when I want to display a negative value on screen. It displays the steroids HUD instead of the - symbol.
Is there any way to fix this through coding?

[Jimmy]

Hendricks266, on Aug 5 2009, 10:53 PM, said:

@Captain Awesome:
Check the sound's priority, the third number in the definesound declaration.
definesound KICK_HIT kickhit.voc 0 0 4 0 0
By default it is set 4, really low. The maximum is 255. You may also want to increase the maximum number of voices in the sound setup. I believe TX recently upped it from 32 to 96.

I've already tried that, but for the sake of it I upped my setting to 96, gave it a priority of 255, played in a map that wasn't playing any sounds, and still it did the same deal. It's really nerve racking because I really don't understand it.

[Hendricks266]

@Captain Awesome
I dunno then. Try messing with WEAPON0_FIRESOUND.

@lycanox:
There is no minus digital symbol, but I have encountered this before and fixed it.

EDukeWiki: How to display negative numbers with the digital font

Attached File(s)

•  digital_minus.zip (1.67K)
  Number of downloads: 914

[XThX2]

OH, and I thought it was a bug in my code... Thanks!

[Lord Misfit]

Oh geeze, I feel like a utter n00b to ask this, seeing as it was probably asked somewhere in the distant past, but...

Well, how in the world to you force a projectile spawned by an actor/player to spawn at a fixed distance in front of them, and WITHOUT using "WEAPONx_SHOOTS" or those other properties. I'm talking about from the eshoot/ezshoot commands. I need to know this because for some reason if my player is moving too fast when firing a specfic projectile this way, the attack gets caught behind them or something and hits the player instead of traveling forward and hitting what's in front of them, because shots spawned from eshoot/ezshoot seem to spawn directly in the same x/y area as the player while "WEAPONx_SHOOTS" will spawn them a fixed enough distanced ahead of the player this problem doesn't happen [I just tested it].

The only things I can think of that are part of this is that the solution would require posx/posy and the ang of the player/actor. However from there on, I'm stumped. Rotatepoint doesn't seem to help [which I tried], and setting various projectile flags momentarily doesn't stop the projectile from hitting the shooting player when they're spawned, so I really need help, and the sad part is that's it's probably some really easy method I'll be headdesking over later in shame when I read it. X_X;

On that note, it's been near-forever since I posted on a Coding-Help topic. I hope I'm not too rusty.