Math Equation... help?

[NeoMarine]

Hey people,

 

I am rather silly and cannot solve this equation/math problem.

 

I am displaying the level of a user. Here's how the experience goes for each level:

 

Level 1  ==  0-9999 EXP

Level 2  ==  10000-19999 EXP

Level 3  ==  20000-39999

Level 4  ==  40000 EXP

 

Where Level 4 is the final level...

 

Now, on the screen I display XXX/XXXX EXP, where XXX = The Experience they have, and XXXX = the Experience they need to reach the next level

 

Take this example, I am level 2 and have 12000 Experience, so on the screen it displays: 12000/40000 EXP

 

Ok now for the problem area... I have a bar behind the text (12000/40000 EXP) where its width percentage is determined based on (12000/40000)*100

 

However, I need the bar to be using (0/40000)*100 BECAUSE when they are 10000/40000 for example, the bar is not displayed at the starting point (its at 10000/40000*100 percent!)

 

I have tried to use ((12000-(last levels max -- in this case its 10000))/40000)*100, which makes the bar start at the right point... but as it gets more towards 39999/40000 it also takes away 10000 so it displays the width as 29999/40000*100 which is incorrect... see?

 

Ok, I know it is complicated, hopefully someone understands what i'm trying to accomplish! I need the bar to display the width as if the exp at each level started at 0, where it really starts as the levels min amount... level 1 works fine... but everything after, the bar doesn't start from 0% width as I need it to!

 

lol... please help!

[rhodesa]

min = the lower limit of level

max = upper limit of level

cur = current amount

 

(cur - min)/(max - min) * 100

 

min = 10000

max = 19999

cur = 12000

(12000 - 10000)/(19999 - 10000) * 100 = 20%

[sasa]

try

<?php
function get_my_level($e){
$levels = array(0,10000,20000,30000,40000);
$max_level = count($levels) - 1;
$level = $max_level;
while ($levels[$level] > $e) $level--;
if ($level == $max_level){
	return array('level' => $level, 'next_level' => 'no next', 'precent' => 0);
}
$next_level = $levels[$level + 1];
$precent = ($e - $levels[$level]) / ($levels[$level + 1] - $levels[$level]) * 100;
return array('level' => $level, 'next_level' => $next_level, 'precent' => $precent);
}
$level = get_my_level(919999);
print_r($level);
?>

[NeoMarine]

Thanks sasa, but I got my own function working with the equation rhodesa provided!

 

Thank you!!!!!!!!!!!!!!  :D