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)

CText3D::Ptr 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 CText3D::Ptr(
                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);
}