5 replies to this topic

[mihashi]

hi

in this function

collision_circle(xc,yc,radius,obj,prec,notme)

what is the purpose of "prec" and "notme"; i know those are booleens, but apart from filling them with true, or false
i don't get what's their purpose;

i tried changing the value but no notifiable effect

so if someone could en-light me that'll be much appreciated

[johnkapid]

Game Maker help file:

"The argument prec indicates whether the check should be precise or only based on the bounding box of the instance. Precise checking is only done when the sprite for the instance has the precise collision checking set. The argument notme can be set to true to indicate that the calling instance should not be checked."

[mihashi]

what i need to do is like a radar surrounding my player and trigger an alert if other objects are
within the range of the radar.

so if i understand what you said early
i have to put notme to true for my player not being a part of the check.

[icymx]

prec is short for for "Precise". If true, it checks for precise collisions within the sprite's bounding box. If false, it will only check for collisions with the rectangular outside of the sprite.

notme is short for "Not me", which literally means "not me". If true, it won't count collisions with the object the function is called from (e.g. If the function is being called from obj_enemy and notme is set to true, if another obj_enemy enters the collision circle it won't affect the result). If false, other instances of the same object affect the output.

[SEC]

You should probably use this for a radar:

The front part is so if there are no enemys, it will not crash.

Var dist;
If round(real(insance_count(enemy))) < 1 {
dist = Point_distance(self.x,self.y,enemy.x,enemy.y)
If dist < 50 { } //Make 50 whatever you want to range of the radar to be. Inside the curly braces is whatever happens when //there is an enemy inside
}

Note: It's better to explain about your problem in the title (etc. "Radar system") and not "need help". Because this is the questions and answers forum, it's safe to assume you need help.

[mihashi]

thks for the tips