poly_wave3（ブログ用）

const divNum = 12;//波の分割数
const waveNum = 1;//波の数

function planeAnim(){
    for (var i = 0; i < planeGeo.vertices.length; i++) {
         
        if(Math.floor(i/(divNum+1))==1){//列ごとに処理
            planeGeo.vertices[i].y=Math.sin((clock.getElapsedTime()+(i/6))*2)*10;
        }else{
            planeGeo.vertices[i].y=Math.sin((clock.getElapsedTime()+(i/6))*2)*20;
        }
    }
    planeGeo.verticesNeedUpdate=true;
}