Send a condition into script

[bangabob 45]

Hello guys.

Got a small problem with my script. I am trying to create a system that manipulates markers and part of this involves passing a condition into the script.

For example

null=["mkr","!alive obj1",[]] execVM "script.sqf";

Script.sqf

_mkr=(_this select 0);
_task=(_this select 1);

while {true} do
{
if (_task) then {//code here};
sleep 0.5;
};

Btw i know i can send the code using {} brackets. But then this doesn't work with "if" statements.

So my question is how can i retrieve code from my script call. I have looked into string manipulation to remove the "" but this is all a little above me.

Thanks for reading

[fn_Quiksilver 1636]

null = ["mkr",{if (!alive obj1) then {true} else {false};},[]] execVM "script.sqf";

Perhaps something like that.

Alternative would be to sort out the bool beforehand and contain it in a variable...

private ["_condition"];

_condition = false;

if (!alive obj1) then {
_condition = true;
};

null = ["mkr",_condition,[]] execVM "script.sqf";

Edited July 22, 2014 by MDCCLXXVI

[bangabob 45]

null = ["mkr",{if (!alive obj1) then {true} else {false};},[]] execVM "script.sqf";

Perhaps something like that.

Alternative would be to sort out the bool beforehand and contain it in a variable...

private ["_condition"];

_condition = false;

if (!alive obj1) then {
_condition = true;
};

null = ["mkr",_condition,[]] execVM "script.sqf";

This is not really what i am looking for because i already use a very similar method as a workaround.

Specifically i want to extract the code from the string by removing the "". Is this even possible?

[SilentSpike 84]

compile sounds like what you're looking for

So:

if (compile _task) then {//code here};

Nevermind, that outputs code (aka {}).

Edited July 22, 2014 by SilentSpike

[cuel 25]

Did you try to return something from the code and then execute it?

null=["mkr",{_cond = !alive obj1; _cond},[]] execVM "script.sqf";

_mkr=(_this select 0);
_task=(_this select 1);

while {true} do
{
if (call _task) then {//code here};
sleep 0.5;
};

[bangabob 45]

Did you try to return something from the code and then execute it?

null=["mkr",{!alive obj1; _cond},[]] execVM "script.sqf";

_mkr=(_this select 0);
_task=(_this select 1);

while {true} do
{
if (call _task) then {//code here};
sleep 0.5;
};

Cool, that works. Im half asleep so i am probably missing something obvious but is there a way to have the {!alive obj1;_cond} bit inside the sqf file rather than the script call

Something like

null=["mkr",{_cond = !alive obj1;},[]] execVM "script.sqf";

_mkr=(_this select 0);
_task=(_this select 1);

// special way here

while {true} do
{
if (call _task) then {//code here};
sleep 0.5;
};

Edited July 22, 2014 by BangaBob

[fight9 14]

Call compile can turn string to code without the brackets.

call compile format ["_obj = %1",_varname];

is the same as

_obj = _varname;

Edited July 22, 2014 by Fight9

[SilentSpike 84]

Call compile can turn string to code without the brackets.

call compile format ["_obj = %1",_varname];

is the same as

_obj = _varname;

You have to call it though because it is a code snippet (aka, has brackets). So it doesn't work in an if statement unless it's returning a boolean

[bangabob 45]

Ive got it. Simple really.

null=["mkr","!alive obj1"] execVM "script.sqf";

Script.sqf

_mkr=(_this select 0);
_task=(_this select 1);

while {true} do
{
if (call compile _task) then {//code here};
sleep 0.5;
};

I used call compile in the if statement.

Turns a string into code.

[tomturner 10]

Just remove the "" from around !alive obj1.

null=["mkr",!alive obj1,[]] execVM "script.sqf";

[SilentSpike 84]

Just remove the "" from around !alive obj1.

Surprised none of us even noticed this sooner :p

[IndeedPete 1038]

Ive got it. Simple really.

null=["mkr","!alive obj1"] execVM "script.sqf";

Script.sqf

_mkr=(_this select 0);
_task=(_this select 1);

while {true} do
{
if (call compile _task) then {//code here};
sleep 0.5;
};

I used call compile in the if statement.

Turns a string into code.

You could optimise it a bit by compiling it one time and then just calling it:

_mkr=(_this select 0);
_task=(_this select 1);
_cond = compile _task;

while {true} do
{
if (call _cond) then {//code here};
sleep 0.5;
};  

It's a bit cleaner since it doesn't force the engine to recompile it on each iteration. Or you could pass it already as code {} as someone mentioned before.

---------- Post added at 07:09 PM ---------- Previous post was at 07:07 PM ----------

Removing the "" will just result in a one-time-only evaluation which is not what he was looking for if he runs the condition stuff in a loop I guess. But I might be wrong, didn't test it.