Graphics How to make blind spot in top down shooter

[silla]

can game maker create blind spot one the player back and behind walls?

I googled around but cannot find one.
all games i saw made by GM has only cycle around player view.

 

[DyingSilence]

This is FOV (Field Of View) algoritm, you have to make it on your own.
The game i'm currently making - Hopeless Descent - is a top down shooter with some FOV working.

Wanna some code snippets?

 

[Yal]

A really simple start is to have a "obstacle" parent object that walls, bushes/trees and other view-obscuring stuff inherits from. Then you could use some code in the draw event of enemies like this:

if(collision_line(x,y,obj_player.x,obj_player.x,parent_obstacle,false,false) != noone){
  exit
}
else{
  /*put your normal drawing code here*/
}

You could easily have a blind spot behind the player by having an invisible obstacle object move around so it's always right behind the player.

 

[silla]

just starting here, thanks. now GM win Unity for my first game.