1, 'cm' => 0.01, 'mm' => 0.001, 'in' => 0.0254, 'px' => 0.000264583, // 0.0254 / 96, 'pt' => 0.000352778, // 0.0254 / 72, 'pc' => 0.004233333, // 0.0254 / 72 * 12 ); public static $duration = array( 's' => 1, 'ms' => 0.001 ); public static $angle = array( 'rad' => 0.1591549430919, // 1/(2*M_PI), 'deg' => 0.002777778, // 1/360, 'grad' => 0.0025, // 1/400, 'turn' => 1 ); }