Create EXP, point and stat functions
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src/math.php
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98
src/math.php
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<?php
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namespace Math;
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/*
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Internal math functions, such as to calculate EXP, HP, stats, etc.
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*/
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/**
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* Calculates the ***total*** EXP required at a particular level in order to level up.
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*/
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function calculate_exp(int $level, int $growthRate): int
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{
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if ($level < 1) throw new \InvalidArgumentException("Level must be 1 or greater");
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// Growth rates:
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// 0 = Erratic
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// 1 = Fast
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// 2 = Medium Fast
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// 3 = Medium Slow
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// 4 = Slow
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// 5 = Fluctuating
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if ($growthRate < 0 || $growthRate > 5) throw new \InvalidArgumentException("Growth rate must be between 0 and 5");
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return match($growthRate) {
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0 => calculate_erratic_exp($level),
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1 => (4 * pow($level, 3)) / 5,
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2 => pow($level, 3),
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3 => ((6 * pow($level, 3)) / 5) - (15 * pow($level, 2)) + (100 * $level) - 140,
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4 => (5 * pow($level, 3)) / 4,
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5 => calculate_fluctuating_exp($level),
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};
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}
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/**
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* Calculate the ***total*** EXP for a given level in the Erratic formula.
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*/
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function calculate_erratic_exp(int $level): int
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{
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if ($level <= 50) {
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return (pow($level, 3) * (100 - $level)) / 50;
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} elseif ($level <= 68) {
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return (pow($level, 3) * (150 - $level)) / 100;
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} elseif ($level <= 98) {
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return (pow($level, 3) * ((1911 - (10 * $level)) / 3)) / 500;
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} else {
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return (pow($level, 3) * (160 - $level)) / 100;
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}
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}
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/**
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* Calculate the ***total*** EXP for a given level in the Fluctuating formula.
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*/
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function calculate_fluctuating_exp(int $level): int
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{
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if ($level <= 15) {
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return pow($level, 3) * ((((($level + 1) / 3) + 24) / 50));
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} elseif ($level <= 36) {
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return pow($level, 3) * (($level + 14) / 50);
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} else {
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return pow($level, 3) * ((($level / 2) + 32) / 50);
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}
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}
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/**
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* Calculate a points total from a base. Modes: 1 (weak), 2 (normal), 3 (strong)
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*/
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function calculate_points(int $base_points, int $level, int $mode = 2): int
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{
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if ($level < 1) throw new \InvalidArgumentException("Level must be 1 or greater");
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$growth_multiplier = match($mode) {
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1 => 0.75,
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2 => 1.0,
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3 => 1.5,
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default => throw new \InvalidArgumentException("Invalid mode. Use 1 (weak), 2 (normal), or 3 (strong)")
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};
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return floor((2 * $base_points * $level * $growth_multiplier) / 100) + $level + 10;
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}
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/**
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* Calculate a stat total from a base. Modes: 1 (weak), 2 (normal), 3 (strong)
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*/
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function calculate_stat(int $base_stat, int $level, int $mode = 2): int
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{
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if ($level < 1) throw new \InvalidArgumentException("Level must be 1 or greater");
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$growth_multiplier = match($mode) {
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1 => 0.75,
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2 => 1.0,
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3 => 1.5,
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default => throw new \InvalidArgumentException("Invalid mode. Use 1 (weak), 2 (normal), or 3 (strong)")
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};
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return floor((2 * $base_stat * $level * $growth_multiplier) / 100) + 5;
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}
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