CText3D.cpp

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/* +---------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)               |
   |                          http://www.mrpt.org/                             |
   |                                                                           |
   | Copyright (c) 2005-2017, Individual contributors, see AUTHORS file        |
   | See: http://www.mrpt.org/Authors - All rights reserved.                   |
   | Released under BSD License. See details in http://www.mrpt.org/License    |
   +---------------------------------------------------------------------------+ */

#include "opengl-precomp.h"  // Precompiled header

#include <mrpt/opengl/CText3D.h>
#include <mrpt/utils/CStream.h>
#include <mrpt/opengl/gl_utils.h>
#include "opengl_internals.h"

using namespace mrpt;
using namespace mrpt::opengl;
using namespace mrpt::utils;
using namespace std;

IMPLEMENTS_SERIALIZABLE( CText3D, CRenderizableDisplayList, mrpt::opengl )

CText3DPtr CText3D::Create(
        const std::string &str,
        const std::string &fontName,
        const double scale,
        const mrpt::opengl::TOpenGLFontStyle text_style,
        const double text_spacing,
        const double text_kerning )
{
        return CText3DPtr( new CText3D(str,fontName,scale,text_style,text_spacing,text_kerning) );
}
/*---------------------------------------------------------------
                                                        Constructor
  ---------------------------------------------------------------*/
CText3D::CText3D(
        const std::string &str,
        const std::string &fontName,
        const double scale ,
        const mrpt::opengl::TOpenGLFontStyle text_style,
        const double text_spacing ,
        const double text_kerning ) :
                m_str ( str ),
                m_fontName ( fontName ),
                m_text_style ( text_style ),
                m_text_spacing ( text_spacing ),
                m_text_kerning ( text_kerning )
{
        this->setScale(scale);
}

/*---------------------------------------------------------------
                                                        Destructor
  ---------------------------------------------------------------*/
CText3D::~CText3D()
{
}

/*---------------------------------------------------------------
                                                        render
  ---------------------------------------------------------------*/
void   CText3D::render_dl() const
{
#if MRPT_HAS_OPENGL_GLUT
        glColor4ub(m_color.R,m_color.G,m_color.B,m_color.A);

        mrpt::opengl::gl_utils::glSetFont(m_fontName);
        mrpt::opengl::gl_utils::glDrawText(
                m_str,
                1.0, // Scale
                m_text_style,
                m_text_spacing, m_text_kerning );

#endif
}

/*---------------------------------------------------------------
   Implements the writing to a CStream capability of
     CSerializable objects
  ---------------------------------------------------------------*/
void  CText3D::writeToStream(mrpt::utils::CStream &out,int *version) const
{
        if (version)
                *version = 0;
        else
        {
                writeToStreamRender(out);
                out << m_str
                        << m_fontName
                        << (uint32_t)m_text_style
                        << m_text_spacing
                        << m_text_kerning;
        }
}

/*---------------------------------------------------------------
        Implements the reading from a CStream capability of
                CSerializable objects
  ---------------------------------------------------------------*/
void  CText3D::readFromStream(mrpt::utils::CStream &in,int version)
{
        switch(version)
        {
        case 0:
                {
                        readFromStreamRender(in);

                        uint32_t        i;
                        in >> m_str
                                >> m_fontName
                                >> i
                                >> m_text_spacing
                                >> m_text_kerning;

                        m_text_style = TOpenGLFontStyle(i);

                } break;
        default:
                MRPT_THROW_UNKNOWN_SERIALIZATION_VERSION(version)

        };
        CRenderizableDisplayList::notifyChange();
}

void CText3D::getBoundingBox(mrpt::math::TPoint3D &bb_min, mrpt::math::TPoint3D &bb_max) const
{
        bb_min.x = 0;
        bb_min.y = 0;
        bb_min.z = 0;

        bb_max.x = m_str.size() * m_scale_x;
        bb_max.y = 1;
        bb_max.z = 0;

        // Convert to coordinates of my parent:
        m_pose.composePoint(bb_min, bb_min);
        m_pose.composePoint(bb_max, bb_max);
}