public function testAdd()
{
$vec = new CVector(1, 1, 1);
$vec2 = new CVector(5, 6, 7);
$ret = $vec->add($vec2);
$this->assertEquals(6, $ret->x);
$this->assertEquals(7, $ret->y);
$this->assertEquals(8, $ret->z);
}
/**
* @param CVector $pos
*
* @return float
*/
public function eval_(CVector $pos)
{
return $this->abs + $this->rand * $this->noise($pos->mul($this->frequency));
}