CColorBar.h

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2019, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */
#pragma once

#include <mrpt/img/color_maps.h>
#include <mrpt/math/TPoint3D.h>
#include <mrpt/opengl/CRenderizableDisplayList.h>

namespace mrpt::opengl
{
/** A colorbar indicator. This class renders a colorbar as a 3D object, in the
 * XY plane.
 * For an overlay indicator that can be easily added to any display, see
 * COpenGLScene::addColorBar()
 *
 * \sa opengl::COpenGLScene,opengl::CRenderizable, COpenGLScene::addColorBar()
 *
 *  <div align="center">
 *  <table border="0" cellspan="4" cellspacing="4" style="border-width: 1px;
 * border-style: solid;">
 *   <tr> <td> mrpt::opengl::CColorBar </td> <td> \image html
 * preview_CColorBar.png </td> </tr>
 *  </table>
 *  </div>
 *
 * \ingroup mrpt_opengl_grp
 */
class CColorBar : public CRenderizableDisplayList
{
    DEFINE_SERIALIZABLE(CColorBar)

   protected:
    mrpt::img::TColormap m_colormap;
    double m_width, m_height;
    std::string m_label_format;
    double m_min_col, m_max_col, m_min_value, m_max_value;
    double m_label_font_size;
    bool m_disable_depth_test{true};

   public:
    /** Render
     * \sa mrpt::opengl::CRenderizable
     */
    void render_dl() const override;

    void setColormap(const mrpt::img::TColormap colormap);
    void setColorAndValueLimits(
        double col_min, double col_max, double value_min, double value_max);
    void enableDepthTest(bool enable);

    /** Evaluates the bounding box of this object (including possible children)
     * in the coordinate frame of the object parent. */
    void getBoundingBox(
        mrpt::math::TPoint3D& bb_min,
        mrpt::math::TPoint3D& bb_max) const override;

    /** Basic empty constructor. Set all parameters to default. */
    CColorBar(
        /** The colormap to represent. */
        const mrpt::img::TColormap colormap = mrpt::img::cmGRAYSCALE,
        /** size of the color bar */
        double width = 0.2, double height = 1.0,
        /** limits for [0,1] colormap indices */
        double min_col = .0, double max_col = 1.0,
        /** limits for values associated to extreme colors */
        double min_value = .0, double max_value = 1.0,
        /** sprintf-like format string for values */
        const std::string& label_format = std::string("%7.02f"),
        /** Label text font size */
        double label_font_size = .05);
};
}  // namespace mrpt::opengl