Making a runescape skill calculator

[tips48]

Couple of questions:

- Is there a forumla to get the xp needed for a level or do I have to hardcode it in a List?

- Is there any easy way of getting all the ways to gain xp or is that something I have to do myself?

 

I'm using Java but if you post in PHP I *should* be able to figure it out. Thanks!

- Tips

[Stev]

Edit: When I'm on my desktop I'll write it in Java if you need. I have functions writting for them in C++ and AHK_L. >.<

<?php

function experience($L) {
 $a=0;
 for($x=1; $x<$L; $x++) {
   $a += floor($x+300*pow(2, ($x/7)));
 }
 return floor($a/4);
}

for($L=1;$L<100;$L++) {
 echo 'Level '.$L.': '.experience($L).'<br />';
}
?>

[RSBDavid]

I found an experience formula here.

<?php
function experience($L) {
$a=0;
for($x=1; $x<$L; $x++) {
$a += floor($x+300*pow(2, ($x/7)));
}
return floor($a/4);
}
for($L=1;$L<100;$L++) {
echo 'Level '.$L.': '.experience($L).'<br />';
}
?>

 

After translating it to Java myself, I found it is not 100% accurate, but close. I did some Googling around and found out pretty much every site uses the same formula. I think around level 101 is where it needs to be decreased by 1. Of course, unless the XP table on tip.it is wrong. It says "104,273,166" for 120 where the formula ends up being "104,273,167".

 

As far as your second question, it would be difficult to get all possible training ways. You could just find the popular ones by navigating forums and double checking the methods they post and then leaving a form field in your calculator for a user to input custom rates.

[Hedgehog]

I'm not sure if doing that many loops every time you need the xp of a level is efficient. I'd rather just store it in an array then reference that as necessary.

 

<?php

$level = array("",0,83,174,276,388,512,650,801,969,1154,1358,1584,1833,2107,2411,2746,3115,3523,3973,4470,5018,5624,6291,7028,7842,8740,9730,10824,12031,13363,14833,16456,18247,20224,22406,24815,27473,30408,33648,37224,41171,45529,50339,55649,61512,67983,75127,83014,91721,101333,111945,123660,136594,150872,166636,184040,203254,224466,247886,273742,302288,333804,368599,407015,449428,496254,547953,605032,668051,737627,814445,899257,992895,1096278,1210421,1336443,1475581,1629200,1798808,1986068,2192818,2421087,2673114,2951373,3258594,3597792,3972294,4385776,4842295,5346332,5902831,6517253,7195629,7944614,8771558,9684577,10692629,11805606,13034431,14391160,15889109,17542976,19368992,21385073,23611006,26068632,28782069,31777943,35085654,38737661,42769801,47221641,52136869,57563718,63555443,70170840,77474828,85539082,94442737,104273167);
echo $level[120];

?>

[Stev]

Well it would depend on his program. Looping 120 times shouldn't even be noticable. :P.

[Hedgehog]

An array would be faster, though, right?

[Stev]

If you're talking hundreds of thousands of searches, then it'll make a difference of a couple milliseconds. :P.

[tips48]

I'm not sure if doing that many loops every time you need the xp of a level is efficient. I'd rather just store it in an array then reference that as necessary.

 

<?php

$level = array("",0,83,174,276,388,512,650,801,969,1154,1358,1584,1833,2107,2411,2746,3115,3523,3973,4470,5018,5624,6291,7028,7842,8740,9730,10824,12031,13363,14833,16456,18247,20224,22406,24815,27473,30408,33648,37224,41171,45529,50339,55649,61512,67983,75127,83014,91721,101333,111945,123660,136594,150872,166636,184040,203254,224466,247886,273742,302288,333804,368599,407015,449428,496254,547953,605032,668051,737627,814445,899257,992895,1096278,1210421,1336443,1475581,1629200,1798808,1986068,2192818,2421087,2673114,2951373,3258594,3597792,3972294,4385776,4842295,5346332,5902831,6517253,7195629,7944614,8771558,9684577,10692629,11805606,13034431,14391160,15889109,17542976,19368992,21385073,23611006,26068632,28782069,31777943,35085654,38737661,42769801,47221641,52136869,57563718,63555443,70170840,77474828,85539082,94442737,104273167);
echo $level[120];

?>

Thanks, I'll probably just use this just because it's so easy.

It's good to know the forumla though in case I ever need it, so thanks guys