class mrpt::opengl::CColorBar¶

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()

See also:

opengl::COpenGLScene, opengl::CRenderizable, COpenGLScene::addColorBar()

#include <mrpt/opengl/CColorBar.h>

class CColorBar:
    public mrpt::opengl::CRenderizableShaderTriangles,
    public mrpt::opengl::CRenderizableShaderWireFrame
{
public:
    // construction

    CColorBar(
        const mrpt::img::TColormap colormap = mrpt::img::cmGRAYSCALE,
        double width = 0.2,
        double height = 1.0,
        float min_col = .0,
        float max_col = 1.0,
        float min_value = .0,
        float max_value = 1.0,
        const std::string& label_format = std::string("%7.02f"),
        float label_font_size = .05f
        );

    //
methods

    virtual void render(const RenderContext& rc) const;
    virtual void renderUpdateBuffers() const;
    virtual shader_list_t requiredShaders() const;
    virtual void onUpdateBuffers_Wireframe();
    virtual void onUpdateBuffers_Triangles();
    void onUpdateBuffers_all();
    virtual void freeOpenGLResources();
    virtual mrpt::math::TBoundingBox getBoundingBox() const;
    void setColormap(const mrpt::img::TColormap colormap);

    void setColorAndValueLimits(
        float col_min,
        float col_max,
        float value_min,
        float value_max
        );
};

Inherited Members¶

public:
    // structs

    struct RenderContext;

    //
methods

    virtual void render(const RenderContext& rc) const = 0;
    virtual void renderUpdateBuffers() const = 0;
    virtual shader_list_t requiredShaders() const;
    virtual auto getBoundingBox() const = 0;
    virtual void freeOpenGLResources() = 0;
    virtual void onUpdateBuffers_Triangles() = 0;
    virtual void onUpdateBuffers_Wireframe() = 0;

Methods¶

virtual void render(const RenderContext& rc) const

Implements the rendering of 3D objects in each class derived from CRenderizable.

This can be called more than once (one per required shader program) if the object registered several shaders.