AlliedModders - Laser Dot.. how?

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Laser Dot.. how?

How would i make a laser dot that goes on whatever wall your aiming at like the rocket launcher from the original half-life?
I just have to get where the user is aiming and spawn a transperent sprite wherever they aim. I think I'd use aimvec or something but im not sure how. Are there any heroes that have this that I can look at? Is it even possible?
I really need to know how to do this. Thanks for your help all.

Code:

/* Gets origin from player.
* Modes:
* 0 - current position.
* 1 - position from eyes (weapon aiming).
* 2 - end position from player position.
* 3 - end position from eyes (hit point for weapon). 
* 4 - position of last bullet hit (only CS). */
native get_user_origin(index, origin[3], mode = 0);

This is the answer you are looking for.

laser dot:

precache "sprites/laserdot.spr"

use the additive sprite 17.

get the aim vector.

then:

Code:

#define TE_SPRITE     17    // additive sprite, plays 1 cycle 



message_begin(MSG_ ,SVC_TEMPENTITY) //message begin 

write_byte(TE_) 

write_coord() // start position 

write_coord() 

write_coord() 

write_short() // sprite index 

write_byte() // scale in 0.1's 

write_byte() // brightness 

message_end()

Im kind of having a little trouble with the help you guys gave me, but it did help get me on track some more and i really appreciate it. Thanks.

I found 2 codes (on amxmodx forums) for a laser sight and I dont know which one to use or how to modify them to match what i want. Can someone help me figure out how to do this.

Here's the first example i found:

Code:

ls_dot = precache_model("sprites/laserdot.spr")

Code:

new aimvec[3]
    get_user_origin(id,aimvec,3)

    //Make the Laser Dot
    message_begin( MSG_BROADCAST,SVC_TEMPENTITY)
    write_byte( 17 )
    write_coord(aimvec[0])
    write_coord(aimvec[1])
    write_coord(aimvec[2])
    write_short( ls_dot )
    write_byte( 10 )
    write_byte( 255 )
    message_end()

And here's the 2nd one (using same precache as above):

Code:

public make_dot(vec[])
{
    message_begin( MSG_BROADCAST,SVC_TEMPENTITY)  
    write_byte( 17 ) 
    write_coord(vec[0]) 
    write_coord(vec[1]) 
    write_coord(vec[2])
    write_short( ls_dot ) 
    write_byte( 10 ) 
    write_byte( 255 ) 
    message_end()
}

So i guess they both do the same thing and they're just a tad bit different.
Here's the code im thinking of using (written by myself):

Code:

public laserAimLoop()
{
    for( new id = 1; id <= SH_MAXSLOTS; id++ ){
        if( !is_user_alive(id) || !shModActive() || !gHasHeroPower[id] ) return
        //Get origin of user
        new aimvec[3]
        get_user_origin(id,aimvec,3)

        //Make laser dot
        message_begin( MSG_BROADCAST,SVC_TEMPENTITY)
        write_byte( 17 )
        write_coord(aimvec[0])
        write_coord(aimvec[1])
        write_coord(aimvec[2])
        write_short( ls_dot )
        write_byte( 10 )
        write_byte( 255 )
        message_end()
    }
}

would that work? would that make a laser sight for all players that have the hero and have it follow there cursor no matter what? Thanks for your help all.

edit: nvm, that looks like it should work, why dont you test it yourself?

i dont have cs on this computer.
my main computer got messed up and i have to repair windows.

I changed the code around a tiny bit and made the error checking better:

Code:

ls_dot = precache_model("sprites/laserdot.spr") 

public laserAimLoop()
{
    if(!shModActive()) return
    for( new id = 1; id <= SH_MAXSLOTS; id++ ){
    if(!gHasHeroPower[id]) return
     if(is_user_alive(id))
     {
         //Get origin of user
                new aimvec[3]
                get_user_origin(id,aimvec,3)

                //Make laser dot
                message_begin( MSG_BROADCAST,SVC_TEMPENTITY)
                write_byte( 17 )
                write_coord(aimvec[0])
                write_coord(aimvec[1])
                write_coord(aimvec[2])
                write_short( ls_dot )
                write_byte( 10 )
                write_byte( 255 )
                    message_end()
    }   
    }

}

Does my code remove the laser dot when they die or do I have to add that in? I'm not sure how I would do that.
So do you guys see any errors... do you think it will work the way i want it to?
thanks for all your help guys

If the user dies, the whole laser thing doesn't get executed at all because you made the check is_user_alive(id). So it's good so far.

Quote:

Originally Posted by Gorlag/Batman

it's good so far.

what do you mean so far? that's it. that's all the code right?

if(!shModActive()) return
for( new id = 1; id <= SH_MAXSLOTS; id++ ){
if(!gHasHeroPower[id]) return
if(is_user_alive(id))

you can just do somethign like this and make it look way cleaner:

Code:

    for( new id = 1; id <= SH_MAXSLOTS; id++ ){ 
        if ( !shModActive() || !gHasHeroPower[id] || !is_user_alive(id)
        {
            // do code
          }
}

and yes, thats all the code you'll need for laser dot to loop.

yang, wouldnt that make it so it does the loop if sh is off, they dont have the power, or theyre dead?

shouldnt it be like

Code:

    for( new id = 1; id <= SH_MAXSLOTS; id++ ){ 

        if ( shModActive() && gHasHeroPower[id] && is_user_alive(id) )

        {

            // do code

        }

}