I am a programmer working with the free version of lite-c.
I am making a game where I have an entity called "rbc"
this entity is supposed to junp to the its side when it hits an entity called "awd".
I used the code:

action rbc_stuff ()
{
if (vec_dist(me.x, awd.x) < 20)
{
c_move...
}
}

my probelm is that when I put this code in SED when I run the game it just says "crash in rbc_stuff"
the part that makes it weird is if I make it the distance between an different entity called "wbc" then I don't get this error with evey other entity I do... It might be connected to the fact that rbc already has an action using vec_dist with wbc but i don't know.

here are the actions for the other two entitys:

action awd_stuff()
{
awd = me;
c_setminmax(me);
}

action wbc_stuff ()
{
wbc = me;
c_setminmax(me);
var swim = 0;
while (1)
{
if (key_cuu)
{
c_move (my, vector(0.5, 0, 0), nullvector, GLIDE);
ent_animate (my, "vert", swim, ANM_CYCLE);
swim += 0.7;
}
if (key_cuu && key_cur)
{
ent_animate (my, "diar", swim, ANM_CYCLE);
swim += 0.7;
}
if (key_cud && key_cul)
{
ent_animate (my, "diar", swim, ANM_CYCLE);
swim -= 0.7;
}
if (key_cud)
{
c_move (my, vector(-0.5, 0, 0), nullvector, GLIDE);
ent_animate (my, "vert", swim, ANM_CYCLE);
swim -= 0.7;
}
if (key_cuu && key_cul)
{
ent_animate (my, "dial", swim, ANM_CYCLE);
swim += 0.7;
}
if (key_cud && key_cur)
{
ent_animate (my, "dial", swim, ANM_CYCLE);
swim -= 0.7;
}
if (key_cul)
{
c_move (my, vector(0, 0.5,0), nullvector, GLIDE);
ent_animate (my, "hori", swim, ANM_CYCLE);
swim += 0.7;
}
if (key_cur)
{
c_move (my, vector(0, -0.5, 0), nullvector, GLIDE);
ent_animate (my, "hori", swim, ANM_CYCLE);
swim -= 0.7;
}

PLEASE HELP!
rstgamer706

The main problem here is that you cannot tell when which entity exists or rather in what order the entities are created at level start up.
So you have to implement a simple check if the entity pointer that you want to use later on in the action is valid.

So lets edit this into your rbc action:


Note:
This might _not_ be the problem if the rbc entity ist definatly created _after_ the awd entity.

Next thing that I noticed:
The rbc_stuff action does not include a while loop. Thus the vec_dist check is only executed once. After that nothing will happen.
So you may need to add this (depending on your game).

edit:
I don't quite get the following sentence:

What do you mean with "rbc already has an action using ..."?

now when I run it it says
Syntax error: while (awd)
what I meant before was that I didn't put all of rbc's action on the forum.
The distance check is in a while (1) loop and in the action I have working
code that is activated when rbc is withing a certain distance from wbc.
Sorry I wasn't clear, please help with the sytax error
rtsgamer706

Is the entity pointer "awd" declared _before_ the action rbc_stuff?

all my entity pointers are the first thing in my code.
(you mean

ENTITY* awd;

right?)

Yes thats what I meant.

Hm, I'm not sure what the problem is then.
Could maybe post all relevant code as it is now?
But please use the [ code ] ... [ /code ] tags (without the spaces)

change youre declarations for your entities to
ENTITY* awd = NULL; (because "ENTITY* awd;" DOESNT garantee awd is NULL)

Then Xarthor's code should work.

But my preferrance is this...It may look more complex, but it isnt really.
But it is more bulletproof and doesnt get upset if awd 'temporarily' is removed.

I no longer get an error
but no matter where I put it in the action rbc just no longer moves.
I have decided that its really an unimportant part of my game
and to forget about it. There is no need to respond to this relpy.
Thanks for the help anyway though.
rtsgamer706