Game maker studio place_meeting

Question

//obj 1 has that:
if (place_meeting(x,y, obj_nomatter)){
 global.points -= 1;
 moveawayfromobj_nomatter();
 // obj 1 rotates.
}

The problem is that the points drops sometimes one or seven. Any ideas for algorithms? Thank you!

Answer 1

you are using that in the step event so it calls the action one or seven times if you still collide for seven steps

one method is to use a timer or a variable

so: this is the method using the variable

var ones = false;
if(!ones) {
  if(place_meeting(x,y,obj_nomatter)) {
    global.points -= 1; 
    ones = true;
  }
}

this is the method using the timer

step event:
if(place_meeting(x,y,obj_nomatter)) {alarm[0] = room_speed;} 
//to use the room_speed, 30 for default (a second)

alarm[0]:
global.points -= 1;

//with this method if you collide more than room_speed global.points keeps going down