class Bullet{

public:
    Vector3 currentPosition;
    Vector3 currentVelocity;

    bool moving;
    bool fired;
    bool reloaded;

    void render(double timeStep){
        if(!fired) //We don't want anything to happen if bullet isn't fired yet
            return;

        if(moving){ //We only want to calculate the new position if the bullet is moving
            currentPosition += currentVelocity * timeStep;
            /* set currentVelocity with respect to air friction, gravity and magic */

            if(currentPosition.z <= 0.0){ //If the z-coordinate is 0 or less (= if it hit the ground)
                currentPosition.z = 0;
                moving = false; //We want it to stop moving
            }
        }

        //Draw
        glBegin(GL_TRIANGLE)
        glTranslate(currentPosition.x, currentPosition.y, currentPosition.z);
        DrawCube();
        glEnd();
    }

    //Constructor only sets everything to 0.
    Bullet()
        :    currentPosition(0,0,0),
            currentVelocity(0,0,0)
            moving(false),
            fired(false),
            reloaded(false),
    {}
};

Bullet g_bullet;

void main(){
    g_bullet.currentVelocity = Vector3(5,0,1); //Starting velocity
}

void Render()
{

    g_bullet.render( 0.01 ); //Bullet travels 0.01 time units every frame.

    glutSwapBuffers();
}