Анимация - scale по одной оси.

//magic scale function :D
function scale(obj, material_name, vector){
    var coords_pos = m_geom.extract_vertex_array(obj, material_name, 'a_position');
    
    var k = 1;
    
    for(var i=0; i < coords_pos.length; i+=1){
        if (k == 1)
            coords_pos[i] *= vector[0];
        else if (k == 2){
            coords_pos[i] *= vector[1];
        }
        else if (k == 3){
            coords_pos[i] *= vector[2];
        }
        k+=1;
        if(k>3) k = 1;
    }
    
    m_geom.update_vertex_array(obj, material_name, 'a_position', coords_pos);
    
    m_obj.update_boundings(obj);
}