lily/include/skyline.hh

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2006--2009 Joe Neeman <joeneeman@gmail.com>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #ifndef SKYLINE_HH
  21 #define SKYLINE_HH
  22
  23 #include "lily-proto.hh"
  24 #include "axis.hh"
  25 #include "box.hh"
  26 #include "interval.hh"
  27 #include "direction.hh"
  28 #include "std-vector.hh"
  29 #include "smobs.hh"
  30
  31 #include <list>
  32
  33 struct Building
  34 {
  35   Real end_;
  36   Real y_intercept_;
  37   Real slope_;
  38
  39   void precompute (Real start, Real start_height, Real end_height, Real end);
  40   Building (Real start, Real start_height, Real end_height, Real end);
  41   Building (Box const &b, Real horizon_padding, Axis a, Direction d);
  42   void print () const;
  43
  44   Real height (Real x) const;
  45   Real intersection_x (Building const &other) const;
  46   void leading_part (Real chop);
  47   bool conceals (Building const &other, Real x) const;
  48   Building sloped_neighbour (Real start, Real horizon_padding, Direction d) const;
  49 };
  50
  51 class Skyline
  52 {
  53 private:
  54   list<Building> buildings_;
  55   Direction sky_;
  56
  57   void internal_merge_skyline (list<Building>*, list<Building>*,
  58                                list<Building> *const result);
  59   list<Building> internal_build_skyline (list<Box>*, Real, Axis, Direction);
  60
  61   DECLARE_SIMPLE_SMOBS(Skyline);
  62
  63 public:
  64   Skyline ();
  65   Skyline (Skyline const &src);
  66   Skyline (Direction sky);
  67   Skyline (vector<Box> const &bldgs, Real horizon_padding, Axis a, Direction sky);
  68   Skyline (Box const &b, Real horizon_padding, Axis a, Direction sky);
  69
  70   vector<Offset> to_points (Axis) const;
  71   void merge (Skyline const &);
  72   void insert (Box const &, Real horizon_padding, Axis);
  73   void print () const;
  74   void print_points () const;
  75   void raise (Real);
  76   void shift (Real);
  77   Real distance (Skyline const &) const;
  78   Real height (Real airplane) const;
  79   Real max_height () const;
  80   void set_minimum_height (Real height);
  81   void clear ();
  82   bool is_empty () const;
  83 };
  84
  85 extern bool debug_skylines;
  86
  87 #endif /* SKYLINE_HH */
  88