/**
* =============================================================================
* Battle Notetags
* =============================================================================
*
* These note tags allow you to set the wave effect.
* You have to put the note tags in the note area of the map properties.
*
* <BATTLEBACK_WAVE : x y>
*
* These values must replace by a real value such as 0.02
* - x : the x value is the same as a waveFrequency.
* - y : the y value is the same as a waveSpeed.
*
* For Example :
* <BATTLEBACK_WAVE : 0.02 0.25>
*
* When using Yanfly's Action Sequence Pack 1, you can enable its filter too.
* This function has the pointer of the Spriteset_Battle and easy to use.
*
* eval: $gameTemp.setBattleBackWaveEffect(cond, waveAmp, waveSpeed);
* - cond : Specify true or false whether the wave effect is used.
* - waveAmp : the default value is to 0.02
* - waveSpeed : the default value is to 0.25
*
*/
$gameMap.event(x)._waveFrequency=0.05;
$gameMap.event(x)._waveSpeed=0.25;
$gameMap.event(x)._wave=true;