LineStripObject.h

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/*
 * Copyright (C) 2012 by
 *   MetraLabs GmbH (MLAB), GERMANY
 * and
 *   Neuroinformatics and Cognitive Robotics Labs (NICR) at TU Ilmenau, GERMANY
 * All rights reserved.
 *
 * Contact: info@mira-project.org
 *
 * Commercial Usage:
 *   Licensees holding valid commercial licenses may use this file in
 *   accordance with the commercial license agreement provided with the
 *   software or, alternatively, in accordance with the terms contained in
 *   a written agreement between you and MLAB or NICR.
 *
 * GNU General Public License Usage:
 *   Alternatively, this file may be used under the terms of the GNU
 *   General Public License version 3.0 as published by the Free Software
 *   Foundation and appearing in the file LICENSE.GPL3 included in the
 *   packaging of this file. Please review the following information to
 *   ensure the GNU General Public License version 3.0 requirements will be
 *   met: http://www.gnu.org/copyleft/gpl.html.
 *   Alternatively you may (at your option) use any later version of the GNU
 *   General Public License if such license has been publicly approved by
 *   MLAB and NICR (or its successors, if any).
 *
 * IN NO EVENT SHALL "MLAB" OR "NICR" BE LIABLE TO ANY PARTY FOR DIRECT,
 * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
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 */

#ifndef _MIRA_LINESTRIPOBJECT_H_
#define _MIRA_LINESTRIPOBJECT_H_

#ifndef Q_MOC_RUN
#include <OGRE/OgreMaterial.h>
#endif

#include <visualization/3d/VisualizationObject.h>


namespace Ogre {
    class BillboardChain;
}

namespace mira {


class LineStripObject : public VisualizationObject
{
public:
    LineStripObject(Ogre::SceneManager* sceneManager, Ogre::SceneNode* parent = NULL);
    virtual ~LineStripObject();

    virtual void setColor(const Ogre::ColourValue& color);

    virtual void setVisible(bool visible, bool cascade = true);
    bool isVisible() const { return mIsVisible; }

    void enableAlphaBlending(bool useAlpha=true);

    void setLineWidth(float width);

public:

    void clear();

    void begin();

    void end();

    void point(const Ogre::Vector3& point);

    void point(const Ogre::Vector3& point, const Ogre::ColourValue& color);


    void add(const Ogre::Vector3& point);

    void add(const Ogre::Vector3& point, const Ogre::ColourValue& color);

    void addLine(const Ogre::Vector3& p1,const Ogre::Vector3& p2);

    void addLine(const Ogre::Vector3& p1,const Ogre::Vector3& p2, const Ogre::ColourValue& color);

private:

    struct Point
    {
        Point() {}
        Point(const Ogre::Vector3& iP, const Ogre::ColourValue& iC) :
            p(iP), c(iC) {}

        Ogre::Vector3 p;
        Ogre::ColourValue c;
    };

    struct Strip
    {
        Strip() : pixelLineSection(-1) {}
        std::list<Point> pts;
        int pixelLineSection;
    };

private:

    void regenerateStrip(std::size_t idx);
    void regenerateAll();
    void manageVisibility();

private:

    std::vector<boost::shared_ptr<Strip>> mStrips;
    boost::shared_ptr<Strip> mActiveStrip;

    Ogre::BillboardChain* mBillboardLines; // for width >0
    Ogre::ManualObject* mPixelLines; // for width <=0

    Ogre::MaterialPtr mMaterial;
    float mWidth;
    Ogre::ColourValue mColor;

    bool mIsVisible;
};


} // namespace

#endif