CText3D.cpp

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2020, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */

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

#include <mrpt/opengl/CText3D.h>
#include <mrpt/serialization/CArchive.h>

#include "gltext.h"

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

IMPLEMENTS_SERIALIZABLE(CText3D, CRenderizable, mrpt::opengl)

CText3D::CText3D(
    const std::string& str, const std::string& fontName, const float 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);
}

CText3D::~CText3D() = default;

void CText3D::onUpdateBuffers_Text()
{
    auto& vbd = CRenderizableShaderText::m_vertex_buffer_data;
    auto& tris = CRenderizableShaderText::m_triangles;
    auto& cbd = CRenderizableShaderText::m_color_buffer_data;
    vbd.clear();
    tris.clear();
    cbd.clear();

    mrpt::opengl::internal::glSetFont(m_fontName);
    mrpt::opengl::internal::glDrawText(
        m_str, tris, vbd, m_text_style, m_text_spacing, m_text_kerning);

    // All lines & triangles, the same color:
    cbd.assign(vbd.size(), m_color);
    for (auto& tri : m_triangles) tri.setColor(m_color);
}

uint8_t CText3D::serializeGetVersion() const { return 0; }
void CText3D::serializeTo(mrpt::serialization::CArchive& out) const
{
    writeToStreamRender(out);
    out << m_str << m_fontName << (uint32_t)m_text_style << m_text_spacing
        << m_text_kerning;
}

void CText3D::serializeFrom(mrpt::serialization::CArchive& in, uint8_t 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);
    };
    CRenderizable::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);
}