Simplest trigger

[VeTaL]

I want to make the simplest trigger, which would be triggered as player moved far from center of the map.

Which one would be the simplest?

 

1) calculate by Pythagoras theorem:

 if (sqrt( sqr (player.x - center.x) + sqr ( player.y - center.y)) > radius) then ... 

it is perfect for my needs, but i'm looking for more simple solution as this consist of two sqr's and one sqrt.

 

2) calculate by squares:

 if ((((player.x - center.x) * ( player.y - center.y)) / 2) > radius) then ...

this is lot faster, but not too precious : (player.x - center.x) can be too large, but if ( player.y - center.y) would be too small, object would be still counted as "inside" the radius even if he would be far away.

 

3) add a physical sphere and trigger event when player wouldn't be inside a sphere

 

 

any ideas about this?

[Canardia]

EntityDistance(centerpivot,player)

[VeTaL]

Well, okay, i hope this is the fastest solution, thanks.

[L B]

I guess EntityDistance does the Pythagorean algorithm anyway. And still, this allows for a low Y value and high X value or vice-versa.

The best method for your situation would really be the physical sphere, or a center inequation from the conics formulas.

[VeTaL]

I think i can use fact, that center of the trigger is map center. So, in another words, i can just check

[if ((player.x < radius) && (player.x > -radius) && (player.y < radius) && player.y > -radius))]

 

Looking like it would be the fastest solution, but it would be square, not sircle.