Hi guys, im having some problem dealing with detecting checkpoint. I used ENABLE_IMPACT and ENABLE_ENTITY, but the problem is what if i only want the check point to detect the player?

Below is what i did:

function checkpoint1_event(){
add_laps_player();
time_left += 20;
my.flags |= PASSABLE;
wait(1000);
my.flags &= ~PASSABLE;
}

action checkpoint1(){

my.emask |= ENABLE_IMPACT | ENABLE_ENTITY;
my.event = checkpoint1_event;
}

What can i do to prevent the AI car from activating the time extension and increment of lap function?

I tried doing condition

while(player){
...
//activate checkpoint
}

but it doesn't seems to work.
What other methods can i try? Thanks.

check to see if its the player who collided


function checkpoint1_event(){
proc_kill(4);// so that there is only one instance of this function running//

if (you==player)
{
add_laps_player();
time_left += 20;
my.flags |= PASSABLE;
wait(1000);
my.flags &= ~PASSABLE;

}


}

Thanks badapple for the fast reply.

There's something wrong still, after trying the solution, the AI cars will just stopped infront of the checkpoint (because it is a little higher on level ground). So i made the check point passable when it detects anything other than the player.

function checkpoint1_event(){
proc_kill(4);// so that there is only one instance of this function running

if (you==player)
{
add_laps_player();
time_left += 20;
my.flags |= PASSABLE;
wait(1000);
my.flags &= ~PASSABLE;
}
else {
my.flags |= PASSABLE;
wait(1);
my.flags &= ~PASSABLE;
}

}

But something is wrong still. One of the AI car will still stop infront of the checkpoint, and the checkpoint does not detect the player anymore.
What are the likely cause of it? Thanks alot for the help!

hmm im not sure , maybe you could post your movement code for the players car and an ai car , this might help us find the solution

but you say ai car stops at checkpoint maybe increase wait time some in your else statement maybe 100 instead of 1 , but really
this doesnt seem to me like the best way for to do your checkpoint maybe try another way

mm.. the player car is the car demo codes, whereas the ai car is quite long and messy and linked everywhere. =\ not sure how to paste the whole chunk.

increasing the wait time does helps, but the checkpoint only detects the player occasionally, and sometimes perform time_left +=20; sometimes add_laps_player();
cranky!!

function checkpoint1_event(){
proc_kill(4);// so that there is only one instance of this function running

if (you==player)
{
add_laps_player();
time_left += 20;
my.flags |= PASSABLE;
wait(50);
my.flags &= ~PASSABLE;
}
else {
my.flags |= PASSABLE;
wait(5);
my.flags &= ~PASSABLE;
}

}

What other methods is good for detecting a checkpoint? i tried scan but it scans too many times..

there is car ai racing in the aums that uses laps maybe check into that see how checkpoint is done there , that might help

aums? Don't know what's that but will look for it. Thanks badapple!

Back from the Conitec/Gamestudio homepage there is a link
to the Acknex Magazine. Thats what Badapple means by "aum's".
Somewhere in there should be a tutorial on how do do approximatly
what you want, or there will probable be a tutorial on how to get
a door to open as a player approches it and that may be modifiable to
be the checkpoint check.