skein/src/orbiter.hpp

#pragma once

#include "gfx.hpp"
#include "icosphere.hpp"
#include "widget.hpp"

#include <GLFW/glfw3.h>
#include <skein/orbit.h>

class Orbiter
{
public:
    Orbiter(Icosphere& sphere, Orbit& orbit, GLuint shaderProgram);
    ~Orbiter();

    void render(const float time);

    void cycleAnimation();

private:
    void updateModelMatrix();
    float getMeanAnomaly();
    glm::vec3 getPosition(const float time);
    void getOrbitalElements(const float time, Vector6& keplerianElements);

    Icosphere& _sphere;
    Orbit& _orbit;
    Widget _widget;

    const float ORBITAL_PERIOD = 6.284;

    // TODO: convert these to an enum
    const int ANIM_ORBITING     = 0;
    const int ANIM_ECCENTRICITY = 1;

    int _animation = ANIM_ORBITING;
};