Checking distance between player and enemy

[pettygrind]

Hello again, Im trying to set up my game so that when an enemy gets within a certain distance of the player they start to chase the player. Im trying to use Math.distance but keeps telling me undefined is not a function. Right now I just want to most basic form of this to work so I tried (this is what function runs from the forEach in the update.)

[apolloarsonist]

Hello again, Im trying to set up my game so that when an enemy gets within a certain distance of the player they start to chase the player. Im trying to use Math.distance but keeps telling me undefined is not a function. Right now I just want to most basic form of this to work so I tried (this is what function runs from the forEach in the update.)

Also another question, what a the easiest or best way to determine knock back, Like when played hits an enemy how do I make player bounce back according to the direction they collide. Also same goes for the emitter is there a somewhat simple way to determine the direction of the bullet so the blood splatter makes sense?

[pettygrind]

Supposing your friend told you that he was stuck in traffic along the way and that he traveled at 50 mph whenever he could move. Therefore, although practically he never really traveled at 25 mph, you can see how the standstills due to traffic caused his average to reduce. Now, if you think about it, from the information given, you can actually tell how long he was driving and how long he was stuck due to traffic (assuming; what is false but what they never worry about in these problems; that he was either traveling at 50 mph or 0 mph). If he was traveling constantly at 50 mph, he should have reached in 2 hours. However, since he took 4 hours, he must have spent the other 2 hours stuck in traffic!

[apolloarsonist]

Supposing your friend told you that he was stuck in traffic along the way and that he traveled at 50 mph whenever he could move. Therefore, although practically he never really traveled at 25 mph, you can see how the standstills due to traffic caused his average to reduce. Now, if you think about it, from the information given, you can actually tell how long he was driving and how long he was stuck due to traffic (assuming; what is false but what they never worry about in these problems; that he was either traveling at 50 mph or 0 mph). If he was traveling constantly at 50 mph, he should have reached in 2 hours. However, since he took 4 hours, he must have spent the other 2 hours stuck in traffic!

Further, what makes them difficult is that the components they give you, or ask you to find can involve variable distances, variable times, variable speeds, or any two or three of these. How you "reassemble" all this in order to use the d = s*t formula takes some reflection that is "outside" of the formula itself. You have to think about how to use the formula.

[grubcommittee]

I will go through THIS problem with you because, since it is SO tricky, it will illustrate a way of looking at almost all the kinds of things you have to think about when working any of these kinds of problems FOR THE FIRST TIME (i.e., before you can do them mechanically because you recognize the TYPE of problem it is). check-distance Intuitively it would seem you need to drive 90, but this turns out to be wrong for reasons I will give in a minute.

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