glc_cuttingplane.cpp

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/****************************************************************************

 This file is part of the GLC-lib library.
 Copyright (C) 2005-2008 Laurent Ribon (laumaya@users.sourceforge.net)
 http://glc-lib.sourceforge.net

 GLC-lib is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; either version 3 of the License, or
 (at your option) any later version.

 GLC-lib is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with GLC-lib; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *****************************************************************************/

#include "glc_cuttingplane.h"
#include "../glc_factory.h"
#include "../maths/glc_line3d.h"
#include "../maths/glc_geomtools.h"
#include "../geometry/glc_arrow.h"
#include "../geometry/glc_disc.h"
#include "glc_pullmanipulator.h"
#include "glc_rotationmanipulator.h"

GLC_CuttingPlane::GLC_CuttingPlane(const GLC_Point3d& center, const GLC_Vector3d& normal, double l1, double l2, GLC_3DWidgetManagerHandle*  pWidgetManagerHandle)
: GLC_3DWidget(pWidgetManagerHandle)
, m_Center(center)
, m_Normal(normal)
, m_CompMatrix()
, m_L1(l1)
, m_L2(l2)
, m_Color(Qt::darkGreen)
, m_Opacity(0.3)
, m_ManipulatorOffsetFactor(1.0)
, m_ScaleFactor(1.0)
, m_SelectionIndex(-1)
, m_CurrentManipulator(TranslationManipulator)
, m_pCurrentManipulator(NULL)
, m_CurrentNavigatorPosition()
{
        if (NULL != pWidgetManagerHandle)
        {
                create3DviewInstance();
        }

        if (glc::Z_AXIS != m_Normal)
        {
                if (m_Normal != -glc::Z_AXIS)
                {
                        m_CompMatrix.setMatRot(glc::Z_AXIS, m_Normal);
                }
                else
                {
                        m_CompMatrix.setMatRot(glc::X_AXIS, glc::PI);
                }
        }

}

GLC_CuttingPlane::GLC_CuttingPlane(const GLC_CuttingPlane& cuttingPlane)
: GLC_3DWidget(cuttingPlane)
, m_Center(cuttingPlane.m_Center)
, m_Normal(cuttingPlane.m_Normal)
, m_CompMatrix(cuttingPlane.m_CompMatrix)
, m_L1(cuttingPlane.m_L1)
, m_L2(cuttingPlane.m_L2)
, m_Color(cuttingPlane.m_Color)
, m_Opacity(cuttingPlane.m_Opacity)
, m_ManipulatorOffsetFactor(cuttingPlane.m_ManipulatorOffsetFactor)
, m_ScaleFactor(cuttingPlane.m_ScaleFactor)
, m_SelectionIndex(cuttingPlane.m_SelectionIndex)
, m_CurrentManipulator(cuttingPlane.m_CurrentManipulator)
, m_pCurrentManipulator(NULL)
, m_CurrentNavigatorPosition(cuttingPlane.m_CurrentNavigatorPosition)
{
        if (NULL != cuttingPlane.m_pCurrentManipulator)
        {
                m_pCurrentManipulator= cuttingPlane.m_pCurrentManipulator->clone();
        }
}

GLC_CuttingPlane::~GLC_CuttingPlane()
{
        delete m_pCurrentManipulator;
}

GLC_CuttingPlane& GLC_CuttingPlane::operator=(const GLC_CuttingPlane& cuttingPlane)
{
        GLC_3DWidget::operator=(cuttingPlane);

        m_Center= cuttingPlane.m_Center;
        m_Normal= cuttingPlane.m_Normal;
        m_CompMatrix= cuttingPlane.m_CompMatrix;
        m_L1= cuttingPlane.m_L1;
        m_L2= cuttingPlane.m_L2;
        m_Color= cuttingPlane.m_Color;
        m_Opacity= cuttingPlane.m_Opacity;
        m_CurrentNavigatorPosition= cuttingPlane.m_CurrentNavigatorPosition;
        delete m_pCurrentManipulator;
        if (NULL != cuttingPlane.m_pCurrentManipulator)
        {
                m_pCurrentManipulator= cuttingPlane.m_pCurrentManipulator->clone();
        }

        return *this;
}

void GLC_CuttingPlane::updateLength(double l1, double l2)
{
        m_L1= l1;
        m_L2= l2;

        if (GLC_3DWidget::has3DWidgetManager())
        {
                GLC_3DWidget::remove3DViewInstance();
                create3DviewInstance();
        }
}

void GLC_CuttingPlane::updateWidgetRep()
{
        const double viewTangent= GLC_3DWidget::widgetManagerHandle()->viewportTangent();
        const GLC_Point3d eye(GLC_3DWidget::widgetManagerHandle()->cameraHandle()->eye());
        const double distanceToNormal= (m_CurrentNavigatorPosition - eye).length();
        const double viewWidth= distanceToNormal * viewTangent;

        m_ScaleFactor= viewWidth * 0.1;
        m_ManipulatorOffsetFactor= m_ScaleFactor * (-0.01);

        moveManipulatorRep(m_CurrentNavigatorPosition);
}

glc::WidgetEventFlag GLC_CuttingPlane::select(const GLC_Point3d& pos, GLC_uint)
{
        Q_ASSERT(NULL == m_pCurrentManipulator);
        Q_ASSERT(TranslationManipulator == m_CurrentManipulator);

        GLC_Viewport* pViewport= GLC_3DWidget::widgetManagerHandle()->viewport();
        m_pCurrentManipulator= new GLC_PullManipulator(pViewport, m_Normal);

        m_pCurrentManipulator->enterManipulateState(pos);
        m_CurrentNavigatorPosition= pos;

        GLC_3DWidget::set3DViewInstanceVisibility(1, true);

        updateWidgetRep();

        return glc::BlockedEvent;
}

glc::WidgetEventFlag GLC_CuttingPlane::mousePressed(const GLC_Point3d& pos, Qt::MouseButton button, GLC_uint id)
{
        glc::WidgetEventFlag returnFlag= glc::IgnoreEvent;
        if (button == Qt::LeftButton)
        {
                const int selectedInstanceIndex= GLC_3DWidget::indexOfIntsanceId(id);
                if (selectedInstanceIndex > 0)
                {
                        m_SelectionIndex= selectedInstanceIndex;
                        if (m_CurrentManipulator == RotationManipulator)
                        {
                                delete m_pCurrentManipulator;
                                m_pCurrentManipulator= rotationNavigator(selectedInstanceIndex);
                        }
                        m_pCurrentManipulator->enterManipulateState(pos);
                }
                else
                {
                        if (NULL != m_pCurrentManipulator)
                        {
                                if (m_CurrentManipulator == RotationManipulator)
                                {
                                        delete m_pCurrentManipulator;
                                        m_pCurrentManipulator= NULL;
                                }
                                else
                                {
                                        m_pCurrentManipulator->enterManipulateState(pos);
                                }

                        }
                        m_CurrentNavigatorPosition= pos;
                        updateWidgetRep();
                }

                returnFlag= glc::BlockedEvent;
        }

        return returnFlag;
}

glc::WidgetEventFlag GLC_CuttingPlane::mouseReleased(Qt::MouseButton button)
{
        glc::WidgetEventFlag returnFlag= glc::IgnoreEvent;
        if ((button == Qt::LeftButton) && (m_SelectionIndex != -1))
        {

                // get selected instance index

                if (m_CurrentManipulator == TranslationManipulator)
                {
                        GLC_3DWidget::set3DViewInstanceVisibility(1, false);
                        GLC_3DWidget::set3DViewInstanceVisibility(2, true);
                        GLC_3DWidget::set3DViewInstanceVisibility(3, true);
                        GLC_3DWidget::set3DViewInstanceVisibility(4, true);

                        returnFlag= glc::BlockedEvent;
                        m_CurrentManipulator= RotationManipulator;
                        delete m_pCurrentManipulator;
                        m_pCurrentManipulator= NULL;

                        moveManipulatorRep(m_CurrentNavigatorPosition);
                }
                else if (m_CurrentManipulator == RotationManipulator)
                {
                        GLC_3DWidget::set3DViewInstanceVisibility(1, true);
                        GLC_3DWidget::set3DViewInstanceVisibility(2, false);
                        GLC_3DWidget::set3DViewInstanceVisibility(3, false);
                        GLC_3DWidget::set3DViewInstanceVisibility(4, false);

                        returnFlag= glc::BlockedEvent;
                        m_CurrentManipulator= TranslationManipulator;

                        delete m_pCurrentManipulator;

                        GLC_Viewport* pViewport= GLC_3DWidget::widgetManagerHandle()->viewport();
                        m_pCurrentManipulator= new GLC_PullManipulator(pViewport, m_Normal);
                        m_pCurrentManipulator->enterManipulateState(m_CurrentNavigatorPosition);

                        moveManipulatorRep(m_CurrentNavigatorPosition);
                }
                m_SelectionIndex= -1;
        }
        return returnFlag;
}

glc::WidgetEventFlag GLC_CuttingPlane::unselect(const GLC_Point3d&, GLC_uint)
{
        resetViewState();
        return glc::AcceptEvent;
}

glc::WidgetEventFlag GLC_CuttingPlane::mouseMove(const GLC_Point3d& pos, Qt::MouseButtons button, GLC_uint)
{
        glc::WidgetEventFlag returnFlag= glc::IgnoreEvent;
        if (button & Qt::LeftButton)
        {
                if (NULL != m_pCurrentManipulator)
                {
                        if (m_SelectionIndex != -1)
                        {
                                moveManipulatorRep(m_CurrentNavigatorPosition);
                                m_SelectionIndex= -1;
                        }
                        GLC_Matrix4x4 moveMatrix(m_pCurrentManipulator->manipulate(pos));

                        // Update plane normal
                        if (m_CurrentManipulator == RotationManipulator)
                        {
                                m_Normal= moveMatrix.rotationMatrix() * m_Normal;
                        }
                        m_CompMatrix= moveMatrix * m_CompMatrix;
                        m_Center= moveMatrix * m_Center;
                        m_CurrentNavigatorPosition= moveMatrix * m_CurrentNavigatorPosition;

                        // Update the instance
                        for (int i= 0; i < 5; ++i)
                        {
                                GLC_3DWidget::instanceHandle(i)->multMatrix(moveMatrix);
                        }

                        // Plane throw intersection and plane normal and camera up vector
                        m_pCurrentManipulator->enterManipulateState(m_pCurrentManipulator->previousPosition());

                        emit asChanged();
                        returnFlag= glc::AcceptEvent;
                }
        }

        return returnFlag;
}

void GLC_CuttingPlane::create3DviewInstance()
{
        Q_ASSERT(GLC_3DWidget::isEmpty());
        // The cutting plane material
        GLC_Material* pMaterial= new GLC_Material(m_Color);
        pMaterial->setOpacity(m_Opacity);

        // Cutting plane 3Dview instance
        GLC_3DViewInstance cuttingPlaneInstance= GLC_Factory::instance()->createCuttingPlane(m_Center, m_Normal, m_L1, m_L2, pMaterial);
        GLC_3DWidget::add3DViewInstance(cuttingPlaneInstance);

        // Normal arrow geometry
        GLC_Arrow* pArrow= new GLC_Arrow(GLC_Point3d(), -glc::Z_AXIS, GLC_3DWidget::widgetManagerHandle()->cameraHandle()->forward().normalize());
        pArrow->setLineWidth(4.5);
        pArrow->setHeadLength(0.15);
        QColor arrowColor(Qt::red);
        arrowColor.setAlphaF(0.4);
        pArrow->setWireColor(arrowColor);

        //Base arrow disc
        pMaterial= new GLC_Material(Qt::red);
        pMaterial->setOpacity(m_Opacity);
        GLC_Disc* pDisc= new GLC_Disc(0.3);
        pDisc->replaceMasterMaterial(pMaterial);

        // Normal arrow + base instance
        GLC_3DRep normalLine(pArrow);
        normalLine.addGeom(pDisc);
        GLC_3DWidget::add3DViewInstance(GLC_3DViewInstance(normalLine));
        GLC_3DWidget::set3DViewInstanceVisibility(1, false);

        // Rotation manipulator
        const double initRadius= 1;
        // Arrond X axis
        pDisc= new GLC_Disc(initRadius);
        pMaterial= new GLC_Material(Qt::red);
        pMaterial->setOpacity(m_Opacity);
        pDisc->replaceMasterMaterial(pMaterial);
        pDisc->setAngle(glc::PI);
        GLC_3DWidget::add3DViewInstance(GLC_3DViewInstance(pDisc));
        GLC_3DWidget::set3DViewInstanceVisibility(2, false);
        // Arround Y axis
        pDisc= new GLC_Disc(initRadius);
        pMaterial= new GLC_Material(Qt::green);
        pMaterial->setOpacity(m_Opacity);
        pDisc->replaceMasterMaterial(pMaterial);
        pDisc->setAngle(glc::PI);
        GLC_3DWidget::add3DViewInstance(GLC_3DViewInstance(pDisc));
        GLC_3DWidget::set3DViewInstanceVisibility(3, false);
        // Arround Z axis
        pDisc= new GLC_Disc(initRadius);
        pMaterial= new GLC_Material(Qt::blue);
        pMaterial->setOpacity(m_Opacity);
        pDisc->replaceMasterMaterial(pMaterial);
        //pDisc->setAngle(glc::PI / 2.0);
        GLC_3DWidget::add3DViewInstance(GLC_3DViewInstance(pDisc));
        GLC_3DWidget::set3DViewInstanceVisibility(4, false);
}

void GLC_CuttingPlane::resetViewState()
{
        Q_ASSERT(m_SelectionIndex == -1);
        for (int i= 0; i < 4; ++i)
        {
                GLC_3DWidget::set3DViewInstanceVisibility(1 + i, false);
        }
        m_pCurrentManipulator= NULL;

        m_CurrentManipulator= TranslationManipulator;
}

void GLC_CuttingPlane::moveManipulatorRep(const GLC_Point3d& pos)
{
        // Create the widget rotation matrix
        const GLC_Matrix4x4 rotationMatrix(m_CompMatrix.rotationMatrix());

        const GLC_Matrix4x4 translationMatrix(pos);
        const GLC_Matrix4x4 offsetMatrix(m_Normal * m_ManipulatorOffsetFactor);
        GLC_Matrix4x4 scaleMatrix;
        scaleMatrix.setMatScaling(m_ScaleFactor, m_ScaleFactor, m_ScaleFactor);
        GLC_3DWidget::instanceHandle(1)->setMatrix(offsetMatrix * translationMatrix * rotationMatrix *scaleMatrix);

        // Rotation manipulator
        QVector<GLC_Matrix4x4> rotations(3);
        rotations[0].setMatRot(glc::Y_AXIS, glc::PI / 2.0); // X
        rotations[0]= GLC_Matrix4x4(glc::X_AXIS, -glc::PI / 2.0) * rotations[0];
        rotations[1].setMatRot(glc::X_AXIS, -glc::PI / 2.0); // Y
        // Z
        for (int i= 0; i < 3; ++i)
        {
                GLC_3DWidget::instanceHandle(2 + i)->setMatrix(offsetMatrix * translationMatrix * rotationMatrix * rotations.at(i) * scaleMatrix);
        }

        GLC_Arrow* pArrow= dynamic_cast<GLC_Arrow*>(GLC_3DWidget::instanceHandle(1)->geomAt(0));
        Q_ASSERT(NULL != pArrow);

        pArrow->setViewDir(rotationMatrix * GLC_3DWidget::widgetManagerHandle()->cameraHandle()->forward().normalize());
}

GLC_AbstractManipulator* GLC_CuttingPlane::rotationNavigator(int index)
{
        index= index - 2;
        Q_ASSERT((index > -1) && (index < 3));

        const GLC_Matrix4x4 rotationMatrix(m_CompMatrix.rotationMatrix());
        GLC_Vector3d axis;
        if (index == 0)
        {
                axis= rotationMatrix * glc::X_AXIS;
        }
        else if (index == 1)
        {
                axis= rotationMatrix * glc::Y_AXIS;
        }
        else
        {
                axis= rotationMatrix * glc::Z_AXIS;
        }
        GLC_AbstractManipulator* pManipulator= new GLC_RotationManipulator(GLC_3DWidget::widgetManagerHandle()->viewport(), GLC_Line3d(m_CurrentNavigatorPosition, axis));

        return pManipulator;
}