cxGraphicalAxes3D.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
All rights reserved.

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   may be used to endorse or promote products derived from this software 
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#include "cxGraphicalAxes3D.h"

#include "boost/bind.hpp"
#include <vtkAxesActor.h>
#include <vtkRenderer.h>
#include <vtkMatrix4x4.h>
#include <vtkCaptionActor2D.h>
#include <vtkTextProperty.h>
#include <vtkAssembly.h>

#include "cxTypeConversions.h"
#include "cxView.h"
#include "cxGraphicalPrimitives.h"

namespace cx
{

GraphicalAxes3D::GraphicalAxes3D(vtkRendererPtr renderer) : m_vtkAxisLength(100)
{
    mViewportListener.reset(new ViewportListener);
    mViewportListener->setCallback(boost::bind(&GraphicalAxes3D::rescale, this));

    mActor = vtkAxesActorPtr::New();
        mActor->SetAxisLabels(false);
        mActor->SetTotalLength( m_vtkAxisLength, m_vtkAxisLength, m_vtkAxisLength );

    this->setAxisLength(0.2);

    this->setShowAxesLabels(true);
    setTransform(Transform3D::Identity());
    setFontSize(0.04);

    this->setRenderer(renderer);
}

void GraphicalAxes3D::setRenderer(vtkRendererPtr renderer)
{
    if (mRenderer)
    {
                mRenderer->RemoveActor(mActor);
        for (unsigned i=0; i<mCaption.size(); ++i)
            mRenderer->RemoveActor(mCaption[i]);
        mViewportListener->stopListen();
    }

    mRenderer = renderer;

    if (mRenderer)
    {
                mRenderer->AddActor(mActor);
        for (unsigned i=0; i<mCaption.size(); ++i)
            mRenderer->AddActor(mCaption[i]);
        mViewportListener->startListen(mRenderer);
        this->rescale();
    }
}

GraphicalAxes3D::~GraphicalAxes3D()
{
    this->setRenderer(NULL);
}

void GraphicalAxes3D::setVisible(bool on)
{
        mActor->SetVisibility(on);
        this->resetAxesLabels();
}

void GraphicalAxes3D::setShowAxesLabels(bool on)
{
        mShowLabels = on;
        this->resetAxesLabels();
}

void GraphicalAxes3D::resetAxesLabels()
{
        if (mRenderer)
        {
                for (unsigned i=0; i<mCaption.size(); ++i)
                        mRenderer->RemoveActor(mCaption[i]);
        }
        mCaption.clear();
        mCaptionPos.clear();

        if (!mShowLabels)
                return;

        this->addCaption("x", Vector3D(1,0,0), Vector3D(1,0,0));
        this->addCaption("y", Vector3D(0,1,0), Vector3D(0,1,0));
        this->addCaption("z", Vector3D(0,0,1), Vector3D(0,0,1));

        if (mRenderer)
        {
                for (unsigned i=0; i<mCaption.size(); ++i)
                        mRenderer->AddActor(mCaption[i]);
        }
}

void GraphicalAxes3D::setCaption(const QString& caption, const Vector3D& color)
{
    this->addCaption(caption, Vector3D(0,0,0), color);
}

void GraphicalAxes3D::setFontSize(double size)
{
    mFontSize = size;
        this->resetAxesLabels();
}

void GraphicalAxes3D::setAxisLength(double length)
{
        mSize = length;
    this->rescale();
}

void GraphicalAxes3D::setTransform(Transform3D rMt)
{
        m_rMt = rMt;
        this->rescale();
}

void GraphicalAxes3D::rescale()
{
        if (!mViewportListener->isListening())
                return;

        double size = mViewportListener->getVpnZoom();
        double axisSize = mSize/size;
        double scale = axisSize / m_vtkAxisLength;

        // NOTE: vtkAxesActor dislikes small values for SetTotalLength, thus we
        // keep that value constant at m_vtkAxisLength and instead scale the transform.
        Transform3D rMq = m_rMt * createTransformScale(Vector3D(scale,scale,scale));

        mActor->SetUserMatrix(rMq.getVtkMatrix());

        for (unsigned i=0; i<mCaption.size(); ++i)
        {
                Vector3D pos = rMq.coord(axisSize*mCaptionPos[i]);
                mCaption[i]->SetAttachmentPoint(pos.begin());
        }
}

void GraphicalAxes3D::addCaption(const QString& label, Vector3D pos, Vector3D color)
{
    vtkCaptionActor2DPtr cap = vtkCaptionActor2DPtr::New();
    cap->SetCaption(cstring_cast(label));
    cap->GetCaptionTextProperty()->SetColor(color.begin());
    cap->LeaderOff();
    cap->BorderOff();
    cap->GetCaptionTextProperty()->ShadowOff();
        cap->SetHeight(mFontSize);
        cap->SetVisibility(mActor->GetVisibility());
        mCaption.push_back(cap);
    mCaptionPos.push_back(pos); 
}


} // namespace cx