Lines 7-24 was generated by OpenAI's davinci-codex using Lines 1-6. Lines 27-33 were generated with only Lines 25-26

camera.c

// I have a plane of size A,B in 3D space. I have a camera, which is pointed dead-on at the plane. The camera is mapping the plane into a window of size X,Y.
// How far Z should the camera be away from the plane for the *entire* plane to be visible?
//

// Find the minimum distance where the entire plane is in view
float get_distance( float plane_width, float plane_height, float fov )
{
    float half_width = plane_width / 2.0f;
    float half_height = plane_height / 2.0f;
    float half_fov = fov / 2.0f;
    float distance = half_width / tan( half_fov );
    return distance;
}

// Find the distance where the plane is centered in the view
float get_distance_center( float plane_width, float plane_height, float fov )
{
    float half_width = plane_width / 2.0f;
    float half_height = plane_height / 2.0f;
    float half_fov = fov / 2.0f;
    float distance = half_width / tan( half_fov ) + half_height;
    return distance;
}

// Find the minimum distance where the entire plane is in view
float get_distance( float plane_width, float plane_height, float fov )
{
    float distance = 0.0f;
    float plane_diagonal = sqrt( plane_width * plane_width + plane_height * plane_height );
    float diagonal_fov = 2.0f * atanf( plane_diagonal / ( 2.0f * fov ) );
    distance = plane_diagonal / tanf( diagonal_fov / 2.0f );
    return distance;
}