Automatic Placer

[Chara]

I made an object that produces particles, and to make things simpler for myself I attempted to make an object that automatically places these emitters anywhere where there aren't walls
The code I'm using is as follows (in alarm 0):

if(!place_meeting(x,y,obj_wall)){instance_create(x,y,obj_floor)}
x+=20
if(x>room_width){y+=20;x=0}
if(y>room_height){instance_destroy(self)}
alarm[1]=1

The create event just sets the object's coordinates to be 0, 0 and activates alarm 0, alarm 1 only activates alarm 0. obj_floor is the emitter

After some testing I've determined that there must be something wrong with place_meeting, because it just places the emitter in every available space regardless of if an obj_wall is present there or not

Any idea what I'm doing wrong?

 

[ophelius]

Are the wall objects maybe on a different layer than the floor objects? I'm pretty sure an object can only check for collision on objects of the same layer.
Apart from that, the code looks fine

 

[Chara]

I haven't changed the depths for either object, so they should be on the same layer

 

[Chara]

It's not really a fix, but I just made it so that the emitters delete themselves if they collide with an obj_wall

I still wonder what went wrong though...

 

[Nidoking]

Does this object (the one you posted code from, not the obj_floor) have a sprite? Can't have collision without a bounding box.

 

[Chara]

Does this object (the one you posted code from, not the obj_floor) have a sprite? Can't have collision without a bounding box.

OH
That makes sense, thank you, it did not have a sprite

 

[ophelius]

OH
That makes sense, thank you, it did not have a sprite

If you don't need a sprite but need collision, just draw like a box for the sprite and turn off the 'visible' checkmark in the object's properties

 

[Chara]

If you don't need a sprite but need collision, just draw like a box for the sprite and turn off the 'visible' checkmark in the object's properties

Thank you!