Drag stops actor?

chrisal

Hi all,

OK as the title suggests I would like to know if drag should eventually stop an actor. I have just left my game for an hour or so in the game viewer and all my actors ran off the screen. Can thins be solved or is this a problem with GS?

Many thanks

RH

The only reason that they should run off the screen is if you make them!

CodeMonkey

Drag slows actors down unless you have behaviors like Move, Move To, Accelerate that continually tell the actor to keep moving.

chrisal

So I would have to stop the actor with a rule if I want the actor to completeley stop?

i.e. If self.motion.x <0.2 and self.motion.y<0.2 = stop actor

chrisal

I have been thinking, and would like to know the difference between drag and friction? Do they accomplish the same results?

millerbrother1

From what I can tell Drag is similar to Friction and they can both work together. Drag is probably best used to slow your character down in a situation where you need him to. For example: You could create a rule that changes the Drag Physics of your character when you press the D key. In this example Pressing D applies the "brakes" (so to speak) to your character and will stop him from moving at his fullest potential. Make sense? Drag is easier to manage in this way. It's a dampener. Gravity has no effect on drag directly.

Friction on the other hand works differently - it is a relationship between objects. When Gravity is on it causes friction between your actor and the ground. The lower the number in your actor's "friction" the more "ice like" the surface will be to him.

Anyone else have a better explanation?

ORBZ

drag is that feeling you feel when you run your hand through the water really fast... the resistance force.

friction is what you feel when you rub sandpaper on your face

to detect and come to a full stop:

speed = magnitude(linearVelocity.X, linearyVelocity.Y)
rule when speed < 2
move 0