class mrpt::opengl::CText

Overview

A 2D text that always “faces the observer” despite it having a real 3D position, used to compute its position on the screen, and depth (so it can be occluded).

Use setString() and setFont() to change the text and its appareance.

See also:

CText3D, opengl::Scene

#include <mrpt/opengl/CText.h>

class CText: public mrpt::opengl::CRenderizableShaderText
{
public:
    // construction

    CText(const std::string& str = std::string(""));

    // methods

    void setString(const std::string& s);
    std::string getString() const;
    void setFont(const std::string& s, int height);
    std::string getFont() const;
    virtual shader_list_t requiredShaders() const;
    virtual void render(const RenderContext& rc) const;
    virtual mrpt::math::TBoundingBoxf internalBoundingBoxLocal() const;
    std::pair<double, double> computeTextExtension() const;
    virtual void toYAMLMap(mrpt::containers::yaml& propertiesMap) const;
};

Inherited Members

public:
    // structs

    struct OutdatedState;
    struct RenderContext;
    struct State;

    // methods

    virtual void render(const RenderContext& rc) const = 0;
    virtual void renderUpdateBuffers() const = 0;
    virtual shader_list_t requiredShaders() const;
    virtual void freeOpenGLResources() = 0;
    virtual shader_list_t requiredShaders() const;
    virtual void render(const RenderContext& rc) const;
    virtual void renderUpdateBuffers() const;
    virtual void onUpdateBuffers_Text() = 0;
    virtual void freeOpenGLResources();

Construction

CText(const std::string& str = std::string(""))

Constructor.

Methods

void setString(const std::string& s)

Sets the text to display.

std::string getString() const

Return the current text associated to this label.

void setFont(const std::string& s, int height)

Sets the font among “sans”, “serif”, “mono”.

virtual shader_list_t requiredShaders() const

Returns the ID of the OpenGL shader program required to render this class.