/*

Copyright Eli Dupree and Isaac Dupree, 2011, 2012, 2013

This file is part of Lasercake.

Lasercake is free software: you can redistribute it and/or modify

it under the terms of the GNU Affero General Public License as

published by the Free Software Foundation, either version 3 of the

License, or (at your option) any later version.

Lasercake is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License

along with Lasercake. If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef LASERCAKE_GL_DATA_PREPARATION_HPP__

#define LASERCAKE_GL_DATA_PREPARATION_HPP__

#include "world.hpp"

#include "input_representation.hpp"

#include "gl_data_abstract.hpp"

struct gl_data_preparation_config {

gl_data_preparation_config(distance view_radius, object_identifier view_from)

: view_radius(view_radius), view_from(view_from) {}

distance view_radius;

object_identifier view_from;

// TODO do we also want the config to be able to specify

// a view *location* (that's not an object)?

// view_from is used to look up location, facing, and avoiding

// drawing the object we're viewing from.

// It is also only used when view_on_the_world::view_type is ROBOT.

};

inline std::ostream& operator<<(std::ostream& os, gl_data_preparation_config const& c) {

// TODO does the float precision we output here matter?

return os << "{view_radius=" << c.view_radius << "; view_from=" << c.view_from << "}";

}

class view_on_the_world {

public:

view_on_the_world(vector3<distance> approx_initial_center);

// Call this every frame that you want user-input to have view-related effects.

void input(input_representation::input_news_t const& input_news);

// To call, default-construct the result and then pass it as a reference.

void prepare_gl_data(world /*TODO const*/& w, gl_data_preparation_config c, abstract_gl_data& result);

// TODO make private and/or trailing underscore

vector3<distance> view_loc_for_local_display;

enum { GLOBAL, LOCAL, ROBOT } view_type;

double local_view_direction;

vector3<distance> surveilled_by_global_display;

distance global_view_dist;

bool drawing_regular_stuff;

bool drawing_debug_stuff;

};

#endif