Class NBodyWidget

example/nbody.cpp:74–103

);

class NBodyWidget : public QGLWidget
{
    Q_OBJECT

public:
    NBodyWidget(std::size_t particles, float dt, QWidget* parent = 0);
    ~NBodyWidget();

    void initializeGL();
    void resizeGL(int width, int height);
    void paintGL();
    void updateParticles();
    void keyPressEvent(QKeyEvent* event);

private:
    QTimer* timer;

    compute::context m_context;
    compute::command_queue m_queue;
    compute::program m_program;
    compute::opengl_buffer m_position;
    compute::vector<float4_>* m_velocity;
    compute::kernel m_velocity_kernel;
    compute::kernel m_position_kernel;

    bool m_initial_draw;

    const uint_ m_particles;
    const float m_dt;
};

NBodyWidget::NBodyWidget(std::size_t particles, float dt, QWidget* parent)
    : QGLWidget(parent), m_initial_draw(true), m_particles(particles), m_dt(dt)