/*
- box.cc -- implement Box
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1996--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1996--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ LilyPond 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.
+
+ LilyPond 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 LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "box.hh"
-#include "array.hh"
void
Box::translate (Offset o)
{
- for (Axis i=X_AXIS; i < NO_AXES; incr(i))
- interval_a_[i] += o[i];
+ for (Axis i = X_AXIS; i < NO_AXES; incr (i))
+ if (!is_empty (i))
+ interval_a_[i] += o[i];
}
void
Box::unite (Box b)
{
- for (Axis i=X_AXIS; i < NO_AXES; incr(i))
+ for (Axis i = X_AXIS; i < NO_AXES; incr (i))
interval_a_[i].unite (b[i]);
}
-/**
- Initialize to empty.
- */
-Box::Box()
-{
+Real
+Box::area () const
+{
+ return interval_a_[X_AXIS].length ()
+ * interval_a_[Y_AXIS].length ();
+}
+
+Box::Box ()
+{
}
void
Box::set_empty ()
{
interval_a_[X_AXIS].set_empty ();
- interval_a_[Y_AXIS].set_empty ();
+ interval_a_[Y_AXIS].set_empty ();
+}
+
+bool
+Box::is_empty () const
+{
+ return is_empty (X_AXIS) && is_empty (Y_AXIS);
+}
+
+bool
+Box::is_empty (Axis a) const
+{
+ Interval empty;
+ empty.set_empty ();
+ return interval_a_[a][LEFT] == empty[LEFT]
+ && interval_a_[a][RIGHT] == empty[RIGHT];
}
Box::Box (Interval ix, Interval iy)
{
- x() = ix;
- y() = iy;
+ x () = ix;
+ y () = iy;
}
Interval &
-Box::operator[] (Axis a)
+Box::operator [] (Axis a)
{
return interval_a_[a];
}
Interval
-Box::operator[] (Axis a)const
+Box::operator [] (Axis a) const
{
return interval_a_[a];
}
interval_a_[X_AXIS] *= s;
interval_a_[Y_AXIS] *= s;
}
+
+void
+Box::add_point (Offset o)
+{
+ interval_a_[X_AXIS].add_point (o[X_AXIS]);
+ interval_a_[Y_AXIS].add_point (o[Y_AXIS]);
+}
+
+Offset
+Box::center () const
+{
+ return Offset (interval_a_[X_AXIS].center (),
+ interval_a_[Y_AXIS].center ());
+}
+
+void
+Box::widen (Real x, Real y)
+{
+ interval_a_[X_AXIS].widen (x);
+ interval_a_[Y_AXIS].widen (y);
+}
+
+void
+Box::intersect (Box b)
+{
+ interval_a_[X_AXIS].intersect (b[X_AXIS]);
+ interval_a_[Y_AXIS].intersect (b[Y_AXIS]);
+}
+
+// for debugging
+
+void
+Box::print ()
+{
+ printf ("X left %4.4f right %4.4f Y down %4.4f up %4.4f\n",
+ interval_a_[X_AXIS][LEFT], interval_a_[X_AXIS][RIGHT],
+ interval_a_[Y_AXIS][DOWN], interval_a_[Y_AXIS][UP]);
+}
+
+/****************************************************************/
+
+
+const char * const Box::type_p_name_ = "ly:box?";