src/Vertex/Vertex.php
public function isOnSameLine(Vertex $vertex) {
        if (is_null($this->getGradient()) && is_null($vertex->getGradient()) && $this->from->getLongitude() == $vertex->getFrom()->getLongitude()) {
            return true;
        } elseif (!is_null($this->getGradient()) && !is_null($vertex->getGradient())) {
            return (
                bccomp($this->getGradient(), $vertex->getGradient(), $this->getPrecision()) === 0
                &&
                bccomp($this->getOrdinateIntercept(), $vertex->getOrdinateIntercept(), $this->getPrecision()) ===0
            );
        } else {
            return false;
        }
    }
public function isOnSameLine(Vertex $vertex) {
        if (is_null($this->getGradient()) && is_null($vertex->getGradient()) && $this->from->getLongitude() == $vertex->getFrom()->getLongitude()) {
            return true;
        } elseif (!is_null($this->getGradient()) && !is_null($vertex->getGradient())) {
            return (
                bccomp($this->getGradient(), $vertex->getGradient(), $this->getPrecision()) === 0
                &&
                bccomp($this->getOrdinateIntercept(), $vertex->getOrdinateIntercept(), $this->getPrecision()) ===0
            );
        } else {
            return false;
        }
    }
public function isOnSameLine ( Vertex $ vertex ) { if ( is_null ( $ this -> getGradient ( ) ) && is_null ( $ vertex -> getGradient ( ) ) && $ this -> from -> getLongitude ( ) == $ vertex -> getFrom ( ) -> getLongitude ( ) ) { return true ; } elseif ( ! is_null ( $ this -> getGradient ( ) ) && ! is_null ( $ vertex -> getGradient ( ) ) ) { return ( bccomp ( $ this -> getGradient ( ) , $ vertex -> getGradient ( ) , $ this -> getPrecision ( ) ) === 0 && bccomp ( $ this -> getOrdinateIntercept ( ) , $ vertex -> getOrdinateIntercept ( ) , $ this -> getPrecision ( ) ) === 0 ) ; } else { return false ; } }
Returns true if the vertex passed on argument is on the same line as this object

@param  Vertex  $vertex The vertex to compare
@return boolean
Returns true if the vertex passed on argument is on the same line as this object