Hello,

I'm adding a muzzle flash model to be created when the gun fires. The flash is supposed to come from a specified vertex which I believe is in the code correctly.

Here is the code:

vec_for_vertex (temp.x, plyr_machinegun, 32);

ent_create (mflash_mgun_mdl, temp.x, muzzle_flash);


However, when I run the engine, there is this error message:

'temp' undeclared identifier
< vec_for_vertex (temp.x, plyr_machinegun, 32); >


Can anyone see what is causing the problem?

replace temp to other.

VECTOR* vec_your_set;
or in void
VECTOR vec_your_set;

A simple solution, thank you 20BN.

I believe temp.x worked in .wdl code but not in lite-c.

The reason is that temp was a predefined VECTOR in wdl but not in lite-C.
Just write
VECTOR temp; // don't make it a pointer (VECTOR*)
at the start of your script, in your function or directly before the commands and it will work.

Btw. the ".x" suffix is superfluous on VECTORs.

Thank you for the tips Superku.

Do you know if its possible to use vec_for_vertex on a ent_createlayer entity?

I've been trying for many hours to figure it out.

Basically the first person weapon is created at the start of the game using ent_createlayer.

When the gun is firing the intention is to create a muzzle flash at the vertex # of the tip of the gun. For some reason it is not appearing when the gun fires (bullets are surely coming out though).

The code in the gun firing function:

VECTOR mgun_tip;

vec_for_vertex(mgun_tip, plyr_machinegun, 32);

ent_create (mgun_flash_mdl, mgun_tip, muzzle_flash);

function muzzle_flash()
{
set (my, PASSABLE);
set (my, TRANSLUCENT);
my.ambient = 100;
my.roll = random(360);
my.scale_x = 5.4;
my.scale_y = my.scale_x;
wait (-0.25);
ent_remove (my);
}

Something I can't seem to figure out from the manual:

Can you use vec_for_vertex on a view entity?

Well the gun is in the camera's own coordinate system and vec_for_vertex would probably return the wrong result either way.
Just find it our yourself what it returns:
- Have the camera at 0-pos and 0-pan. Have your gun at 0-(view-)pos as well. Call vec_for_vertex on your gun and note the result (compare with MED).
- Put the gun at the right position and repeat.
- Moving and rotating the camera should return the same result.
- If so, use vec_rotate(temp,camera.pan) and vec_add(temp,camera.x) to get the world position.

I see, the vector needs to be converted to a world position. I will play around with it, thank you Superku.

Your advice worked perfectly.

Very well.