Hi.

i dont know if this is a small or a big question beacuse
im not very good at the math things.

im looking for a line of sight for my enemies and not just a "line" but more a triangle i already tried to make it but then it was getting in trouble with the walls and stuff.

if you guys know a tutorial or some math to do this i would like to hear it

Greetings

Reaven

---

I think this is a complex question if I understand your problem well.
You want to have a (visible?) line of sight triangle for the enemies, but when they're close to a wall you don't want the line of sight to overlap the wall if I'm correct.

This is certainly not my cup of tea, but I found a little something for you:
http://sc.tri-bit.com/Computing_LOS_for_Large_Areas

---

lol. I'm quite sure he's not going to be able to implement it the way they do over there. You're right myth, it is quite the complex issue. If you want to do it reaven I'm afraid you're stuck with it not being blocked by walls. The only thing you could probably realize considering wall interaction is that you do it the following way:

You attach a view range movieclip to your enemies in the form of a triangle. You use that triangle to hittest the player in order to find out if the player has been spotted. This is a bit tricky since in order to let a triangle hittest something you're going to have to do a pointwise hittest. So like: triangle.hitTest(player._x,player._y,true). (keep in mind though that this is a very simplified way of putting it).

Now you could move those triangles around using a script to let the enemies look around instead of always looking in the same direction. That would require some additional coding.

If adding to that you'd want to let walls block sight you'd need to do some more advanced coding for the moving around of those triangles and that can be quite a hassle.

Of course there are other ways of doing it but in the end none of them is very easy.

---

"The absence of rules is the enemy of art." ~Orson Wells

AH.. right

is there something/way to this on my level?

Greetings

---

The triangle way Crisis just said.

---

but crisis also said that wassent easy too
but i already tried something like that.
but i could do it like attaching it to a enemy then hittest through an array but how do i know that way wich enemy his line of sight i have hit?
thats the tricky part of this

---

I don't know how to program using ActionScript but I have basic knowledge of Turing and Visual Basic.

Couldn't you make a triangle like Crisis said and then specify that if any part of it hits a solid object that piece of the triangle goes missing and the resulting shape (aka the triangle missing a chunk) becomes a new object (and becomes the new line of sight)?

Like I said, I don't know ActionScript or Flash but if what I said makes sense and you don't get it, I could draw a picture.

Greetings

JC-Gamer

---

Genesis 3:15-17 "And God said,'Let man be created in my image and have power over everything on earth. Brawl, Mario Kart, and even Legend of Zelda are yours to master and control..."

thanks for the reply JC.

i know what you mean but i think in flash that shloud be done with bitmaps[like in worms destroying the ground]
but im not that good in flash to do that and flash doesnt have solid or not solid objects[as far as i know]

Greetz

---

Bitmaps?

---

The best way to do it is with a lot of maths.

---

i was afraid of that..

now i got like a circle around the enemy with math and if you come closer than that pixels he attakcs you for example.... if i only could make that script dont go through walls..

Greetz

---

Maybe you could do so what you said:
reaven said:
And then draw an invisible line between the enemy and the player. Hit test with this line so you can check whether there are objects in between. Remember that the hit test should not be one with a box around the line, because that makes diagonal checks impossible. I'm not sure if such a check (hit test) exists in the standard library of actionscript.

---

Well you can do a shape focused hittest, but only if you hittest a shape with a single point. You can't hittest a shape with another shape like that. This would result in flash hittesting the bounding boxes around the shapes.

---

"The absence of rules is the enemy of art." ~Orson Wells

soo.. i need to draw a line from every enemy to the player and if the line hittests awall the line becomes like disabled or deletes and if the line hittests the player i can do the actions this way i dont need a circle but the enemy has eyes in his back this way and can look like 10.000 miles far.

soo much problems and to less skill sjeesh this is hard im glad i have flash on school lol but that wont help me with this stupit things all the time.. [ and now make a square ]

couldt you guys give me like something so i can learn all this? with draw line functions and stuff? i would realy appreciate that

Greetz

---

Hi.

i got a line of sight now! with some help of mennez

and this with no math at all!

but i only got 2 problems left now

the line of sight is a triangle but it is a movieclip
so flash makes it a square so i doesnt hittest the triangle but the movieclip around it.

and the line of sight goes trough walls.

i hope you can help me with these 2

Greetz

---