BulkCommands busy code

    public function isInside(Vector3 $p){
        $v2 = new Vector2($p->x, $p->z);
        $hash = $this->hash($v2);
        if(isset($this->cache[$hash])){
            return $this->cache[$hash];
        }
        $intersects = 0;
        foreach($this->lines as $line){
            $intersects += $line->isAbsolutelyAbove($v2);
        }
        $this->cache[$hash] = $result = (bool) ($intersects & 1);
        return $result;
    }

    public function isAbsolutelyAbove(Vector2 $pt){
        $intercept = $this->getZInterceptByX($pt->x);
        if($intercept > $pt->y){
            return self::ABOVE;
        }
        if($intercept === $pt->y){
            return self::INTERSECT;
        }
        return self::BELOW;
    }
    public function getSlope(){
        return ($this->toz - $this->fromz) / ($this->tox - $this->fromx);
    }
    public function getZInterceptByX($x0){
        return $this->fromz - ($this->fromx - $x0) * $this->getSlope(); // c=mx-y
    }