cxDistanceMetric.cpp

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/*=========================================================================
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#include "cxDistanceMetric.h"
#include "cxBoundingBox3D.h"
#include "cxTypeConversions.h"
#include "cxPlaneMetric.h"
#include "cxPointMetric.h"

#include "cxPatientModelService.h"

namespace cx
{

DistanceMetric::DistanceMetric(const QString& uid, const QString& name, PatientModelServicePtr dataManager, SpaceProviderPtr spaceProvider) :
                                DataMetric(uid, name, dataManager, spaceProvider)
{
        mArguments.reset(new MetricReferenceArgumentList(QStringList() << "line endpoint 0" << "line endpoint 1"));
        mArguments->setValidArgumentTypes(QStringList() << "pointMetric" << "planeMetric");

        connect(mArguments.get(), SIGNAL(argumentsChanged()), this, SLOT(resetCachedValues()));
        connect(mArguments.get(), SIGNAL(argumentsChanged()), this, SIGNAL(transformChanged()));
}

DistanceMetricPtr DistanceMetric::create(QString uid, QString name, PatientModelServicePtr dataManager, SpaceProviderPtr spaceProvider)
{
        return DistanceMetricPtr(new DistanceMetric(uid, name, dataManager, spaceProvider));
}

DistanceMetric::~DistanceMetric()
{
}

Vector3D DistanceMetric::getRefCoord() const
{
    return this->boundingBox().center();
}

bool DistanceMetric::isValid() const
{
    return this->getEndpoints().size()==2;
}

void DistanceMetric::addXml(QDomNode& dataNode)
{
        DataMetric::addXml(dataNode);
        mArguments->addXml(dataNode);
}

void DistanceMetric::parseXml(QDomNode& dataNode)
{
        DataMetric::parseXml(dataNode);

        mArguments->parseXml(dataNode, mDataManager->getDatas());
        this->resetCachedValues();
}

void DistanceMetric::resetCachedValues()
{
        mCachedEndPoints.reset();
}

std::vector<Vector3D> DistanceMetric::getEndpoints() const
{
        this->updateCache();
        return mCachedEndPoints.get();
}

void DistanceMetric::updateCache() const
{
        if (!mCachedEndPoints.isValid())
        {
                std::vector<Vector3D> endpoints;
                Vector3D direction;
                this->getEndpointsUncached(&endpoints, &direction);
                mCachedEndPoints.set(endpoints);
                mCachedDirection.set(direction);
        }
}

void DistanceMetric::getEndpointsUncached(std::vector<Vector3D> *endpoints, Vector3D* direction) const
{
        DataPtr a0 = mArguments->get(0);
        DataPtr a1 = mArguments->get(1);

        if (!a0 || !a1)
        {
                endpoints->clear();
                return;
        }
        std::vector<Vector3D> retval(2);
        Vector3D dir;

        // case   I: point-point
        // case  II: point-plane
        // case III: plane-plane (not implemented)

        if ((a0->getType() == "pointMetric") && (a1->getType() == "pointMetric"))
        {
                retval[0] = boost::dynamic_pointer_cast<PointMetric>(a0)->getRefCoord();
                retval[1] = boost::dynamic_pointer_cast<PointMetric>(a1)->getRefCoord();
                dir = (retval[1] - retval[0]).normal();
        }
        else if ((a0->getType() == "planeMetric") && (a1->getType() == "pointMetric"))
        {
                Plane3D plane = boost::dynamic_pointer_cast<PlaneMetric>(a0)->getRefPlane();
                Vector3D p = boost::dynamic_pointer_cast<PointMetric>(a1)->getRefCoord();

                retval[0] = plane.projection(p);
                retval[1] = p;
                dir = plane.normal();
        }
        else if ((a0->getType() == "pointMetric") && (a1->getType() == "planeMetric"))
        {
                Plane3D plane = boost::dynamic_pointer_cast<PlaneMetric>(a1)->getRefPlane();
                Vector3D p = boost::dynamic_pointer_cast<PointMetric>(a0)->getRefCoord();

                retval[1] = plane.projection(p);
                retval[0] = p;
                dir = plane.normal();
        }
        else
        {
                endpoints->clear();
        }

        *endpoints = retval;
        *direction = dir;
}

double DistanceMetric::getDistance() const
{
        std::vector<Vector3D> endpoints = this->getEndpoints();
        if (endpoints.size() != 2)
                return -1;

        Vector3D dir = this->getDirection();

        return dot(endpoints[1] - endpoints[0], dir);
}

Vector3D DistanceMetric::getDirection() const
{
        this->updateCache();
        return mCachedDirection.get();
}

QString DistanceMetric::getValueAsString() const
{
        return QString("%1 mm").arg(this->getDistance(), 0, 'f', 1);
}

DoubleBoundingBox3D DistanceMetric::boundingBox() const
{
        return DoubleBoundingBox3D::fromCloud(this->getEndpoints());
}


}