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/* Radar.h
Copyright (c) 2014 by Michael Zahniser
Endless Sky is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later version.
Endless Sky 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "Color.h"
#include "Point.h"
#include <vector>
// Class representing all objects which should show up on radar. Each object is
// either a ring (planets) or a dot (ships) and has a color representing its status
// (owned by player, friendly, unfriendly, hostile, inactive, or special).
class Radar {
public:
static const int PLAYER;
static const int FRIENDLY;
static const int UNFRIENDLY;
static const int HOSTILE;
static const int INACTIVE;
static const int SPECIAL;
static const int ANOMALOUS;
static const int BLINK;
static const int VIEWPORT;
static const int STAR;
public:
void Clear();
void SetCenter(const Point ¢er);
// Add an object. If "inner" is 0 it is a dot; otherwise, it is a ring. The
// given position should be in world units (not shrunk to radar units).
void Add(int type, Point position, double outer, double inner = 0.);
// Add a pointer, pointing in the direction of the given vector.
void AddPointer(int type, const Point &position);
// Add a viewport vertex indicating the extent of what can be seen on screen.
void AddViewportBoundary(const Point &vertex);
// Draw the radar display at the given coordinates.
void Draw(const Point ¢er, double scale, double radius, double pointerRadius) const;
// Get the color for the given status.
static const Color &GetColor(int type);
private:
class Object {
public:
Object(const Color &color, const Point &pos, double out, double in);
Color color;
Point position;
double outer;
double inner;
};
class Pointer {
public:
Pointer(const Color &color, const Point &unit);
Color color;
Point unit;
};
class Line {
public:
Line(const Color &color, const Point &base, const Point &vector);
Color color;
Point base;
Point vector;
};
private:
Point center;
std::vector<Object> objects;
std::vector<Pointer> pointers;
std::vector<Line> lines;
};
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