name : coloreasing.class.php <?php /** * @author ThemePunch <info@themepunch.com> * @link https://www.themepunch.com/ * @copyright 2022 ThemePunch */ if(!defined('ABSPATH')) exit(); if(!class_exists('RSColorEasing')) { class RSColorEasing { public function __construct() {} /** * get the distance between two r/g/b values * @since 6.0 */ public static function distColor($px, $bx, $ex, $bv, $ev) { $num = abs(((($px - $bx) / ($ex - $bx)) * ($ev - $bv)) + $bv); $num = round($num); $num = min($num, 255); return max($num, 0); } /** * get the distance between two alpha values * @since 6.0 */ public static function distAlpha($px, $bx, $ex, $bv, $ev) { $bv = floatval($bv); $num = floatval((($px - $bx) / ($ex - $bx)) * ($ev - $bv)); $num = number_format($num, 2, '.', ''); $num = abs($num + $bv); $num = min($num, 1); return max($num, 0); } /** * insert easing colors to a gradient * @since 6.0 */ public static function insertPoints($start, $end, &$ar, $easing, $strength) { $startPos = $start['position']; $endPos = $end['position']; if($startPos > $endPos) return; $positions = array(); $point; $val; $px; for($i = 0; $i < $strength; $i++) { $val = RSColorEasing::easing($i, 0, 1, $strength, $easing); $val = floatval($val); $val = number_format($val, 2, '.', ''); $val = $val * ($endPos - $startPos) + $startPos; if($val > $startPos && $val < $endPos) $positions[] = $val; } $len = count($positions); $num = floatval(($endPos - $startPos) / ($len + 1)); $count = number_format($num, 2, '.', ''); $p = $count + $startPos; for($i = 0; $i < $len; $i++) { $px = $positions[$i]; if($px === $start['position']) continue; $r = RSColorEasing::distColor($px, $startPos, $endPos, $start['r'], $end['r']); $g = RSColorEasing::distColor($px, $startPos, $endPos, $start['g'], $end['g']); $b = RSColorEasing::distColor($px, $startPos, $endPos, $start['b'], $end['b']); $a = RSColorEasing::distAlpha($px, $startPos, $endPos, $start['a'], $end['a']); $startA = RSColorpicker::sanitizeAlpha($start['a']); $endA = RSColorpicker::sanitizeAlpha($end['a']); $point = array( 'position' => $p, 'r' => $start['r'] !== $end['r'] ? round($r) : $start['r'], 'g' => $start['g'] !== $end['g'] ? round($g) : $start['g'], 'b' => $start['b'] !== $end['b'] ? round($b) : $start['b'], 'a' => $startA !== $endA ? RSColorpicker::sanitizeAlpha($a) : $startA ); $p += $count; $p = number_format(floatval($p), 2, '.', ''); $ar[] = $point; } } /** * easing equations * @since 6.0 */ public static function easing($n, $t, $e, $u, $ease = 'sine.easeinout') { $easing = array('sine, easeinout'); if(is_string($ease) && strpos($ease, '.') !== false) { $ease = explode('.', $ease); if(count($ease) === 2) $easing = [$ease[0], $ease[1]]; } switch($easing[0]) { case 'quint': switch($easing[1]) { case 'easein': return $e*(($n=$n/$u-1)*$n*$n*$n*$n+1)+$t; break; case 'easeout': return $e*($n/=$u)*$n*$n*$n*$n+$t; break; case 'easeinout': return ($n/=$u/2)<1?$e/2*$n*$n*$n*$n*$n+$t:$e/2*(($n-=2)*$n*$n*$n*$n+2)+$t; break; } break; case 'quad': switch($easing[1]) { case 'easein': return $e*($n/=$u)*$n+$t; break; case 'easeout': return -$e*($n/=$u)*($n-2)+$t; break; case 'easeinout': return ($n/=$u/2)<1?$e/2*$n*$n+$t:-$e/2*(--$n*($n-2)-1)+$t; break; } break; case 'quart': switch($easing[1]) { case 'easein': return $e*($n/=$u)*$n*$n*$n+$t; break; case 'easeout': return -$e*(($n=$n/$u-1)*$n*$n*$n-1)+$t; break; case 'easeinout': return ($n/=$u/2)<1?$e/2*$n*$n*$n*$n+$t:-$e/2*(($n-=2)*$n*$n*$n-2)+$t; break; } break; case 'cubic': switch($easing[1]) { case 'easein': return $e*($n/=$u)*$n*$n+$t; break; case 'easeout': return $e*(($n=$n/$u-1)*$n*$n+1)+$t; break; case 'easeinout': return ($n/=$u/2)<1?$e/2*$n*$n*$n+$t:$e/2*(($n-=2)*$n*$n+2)+$t; break; } break; case 'circ': switch($easing[1]) { case 'easein': return -$e*(sqrt(1-($n/=$u)*$n)-1)+$t; break; case 'easeout': return $e*sqrt(1-($n=$n/$u-1)*$n)+$t; break; case 'easeinout': return ($n/=$u/2)<1?-$e/2*(sqrt(1-$n*$n)-1)+$t:$e/2*(sqrt(1-($n-=2)*$n)+1)+$t; break; } break; case 'expo': switch($easing[1]) { case 'easein': return 0===$n?$t:$e*pow(2,10*($n/$u-1))+$t; break; case 'easeout': return $n===$u?$t+$e:$e*(1-pow(2,-10*$n/$u))+$t; break; case 'easeinout': if(0===$n){ return $t; }elseif($n===$u){ return $t+$e; }elseif(($n/=$u/2)<1){ return $e/2*pow(2,10*($n-1))+$t; }else{ return $e/2*(2-pow(2,-10*--$n))+$t; } //return 0===$n?$t:$n===$u?$t+$e:($n/=$u/2)<1?$e/2*pow(2,10*($n-1))+$t:$e/2*(2-pow(2,-10*--$n))+$t; break; } break; case 'bounce': switch($easing[1]) { case 'easein': return $e-RSColorEasing::easing($u-$n,0,$e,$u,'bounce.easeout')+$t; break; case 'easeout': if(($n/=$u)<(1/2.75)){return $e*(7.5625*$n*$n)+$t;} else if($n<(2/2.75)){return $e*(7.5625*($n-=(1.5/2.75))*$n+0.75)+$t;} else if ($n<(2.5/2.75)){return $e*(7.5625*($n-=(2.25/2.75))*$n+0.9375)+$t;} else{return $e*(7.5625*($n-=(2.625/2.75))*$n+0.984375)+$t;} break; case 'easeinout': if($n<$u/2){return RSColorEasing::easing($n*2,0,$e,$u,'bounce.easein')*0.5+$t;} else{return RSColorEasing::easing($n*2-$u,0,$e,$u,'bounce.easeout')*0.5+$e*0.5+$t;} break; } break; default: switch($easing[1]) { case 'easein': return -$e*cos($n/$u*(M_PI/2))+$e+$t; break; case 'easeout': return $e*sin($n/$u*(M_PI/2))+$t; break; default: return -$e/2*(cos(M_PI*$n/$u)-1)+$t; // end default } // end default } return 0; } } }