Checking if object is no longer colliding with collision event

[Daz@mbi]

Is there an efficient or simple way to check if an object is no longer colliding with another object when using the collision event?

 

[graviax]

Why do you want to do that?

 

[Daz@mbi]

I'm using the collision event to change variables that belong to the player, then changing them back when the player is no longer colliding.

 

[RangerX]

You need to think your stuff the other way around. Check if the object is colliding.

Use the "place_meeting()" function (look up the manual for arguments) in this way:

Step event in the hero:

if (place_meeting with the other object)
then
{
set stats to X
}
else
{
set stats to Y
}

 

[graviax]

If you really want to check if an object or and instance is not colliding with an other you can use the place_meeting function https://docs.yoyogames.com/source/dadiospice/002_reference/movement and collisions/collisions/place_meeting.html.
But you should re-think your code.

 

[rui.rosario]

If you still want to perform that check with the Collision Event then maybe you can do something like this (this is untested, but I believe the events happen in the expected order).

1. On the Begin Step event set a variable (e.g. collision) to false;
2. On the Collision Event set the variable to true;
3. On the End Step event see if the variable is true, if it is then a collision occurred and you can perform the remaining logic.

 

[Daz@mbi]

If you still want to perform that check with the Collision Event then maybe you can do something like this (this is untested, but I believe the events happen in the expected order).

1. On the Begin Step event set a variable (e.g. collision) to false;
2. On the Collision Event set the variable to true;
3. On the End Step event see if the variable is true, if it is then a collision occurred and you can perform the remaining logic.

That works perfectly, thank you

 

[Aura]

You can use an alarm event as well. Set the alarm to a small number of steps this way in the Step event:

if (place_meeting(x, y, obj_spike)) {
   alarm[0] = 2;
}

The alarm would keep on resetting to 2 as long as there is a collision. As soon as the collision ends, the alarm would start to count down and trigger the Alarm 0 event, producing a Collision End alternative, that is, Alarm 0.

 

[gnysek]

You can use an alarm event as well. Set the alarm to a small number of steps this way in the Step event:

if (place_meeting(x, y, obj_spike)) {
   alarm[0] = 2;
}

The alarm would keep on resetting to 2 as long as there is a collision. As soon as the collision ends, the alarm would start to count down and trigger the Alarm 0 event, producing a Collision End alternative, that is, Alarm 0.

It's important to not setting alarm to 1 in this case, as alarms generally triggers when it's equal to 0, so it may be set to 0 right before NEXT collision event in next frame, and will be executed every time before/after collision.

Generally in your case, setting variable in "begin step" to false, and in collision to true, should be enough.