/*
- stencil.cc -- implement Stencil
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.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 "stencil.hh"
Stencil::is_empty () const
{
return (expr_ == SCM_EOL
- || dim_[X_AXIS].is_empty ()
- || dim_[Y_AXIS].is_empty ());
+ || dim_[X_AXIS].is_empty ()
+ || dim_[Y_AXIS].is_empty ());
}
SCM
void
Stencil::rotate (Real a, Offset off)
{
- rotate_degrees (a *180/M_PI, off);
+ rotate_degrees (a * 180 / M_PI, off);
}
/*
- Rotate this stencil around the point [x, y]
+ Rotate this stencil around the point ABSOLUTE_OFF.
+
*/
void
-Stencil::rotate_degrees (Real a, Offset off)
+Stencil::rotate_degrees_absolute (Real a, Offset absolute_off)
{
- const Real x_cen = extent (X_AXIS).center ();
- const Real y_cen = extent (Y_AXIS).center ();
-
- /*
- * Calculate the center of rotation
- */
- const Real x = x_cen + off[X_AXIS] * x_cen;
- const Real y = y_cen + off[Y_AXIS] * y_cen;
+ const Real x = absolute_off[X_AXIS];
+ const Real y = absolute_off[Y_AXIS];
/*
* Build scheme expression (processed in stencil-interpret.cc)
*/
+ /* TODO: by hanwenn 2008/09/10 14:38:56:
+ * in effect, this copies the underlying expression. It might be a
+ * little bit nicer to mirror this in the api, ie. make a
+ * Stencil::rotated()
+ * and have Stencil::rotate be an abbrev of
+ * *this = rotated()
+ */
+
expr_ = scm_list_n (ly_symbol2scm ("rotate-stencil"),
- scm_list_2 (scm_from_double (a),
- scm_cons (scm_from_double (x), scm_from_double (y))),
- expr_, SCM_UNDEFINED);
+ scm_list_2 (scm_from_double (a),
+ scm_cons (scm_from_double (x), scm_from_double (y))),
+ expr_, SCM_UNDEFINED);
/*
* Calculate the new bounding box
*/
+ Box shifted_box = extent_box ();
+ shifted_box.translate (-absolute_off);
+
vector<Offset> pts;
- pts.push_back (Offset (-x_cen, -y_cen));
- pts.push_back (Offset (x_cen, -y_cen));
- pts.push_back (Offset (x_cen, y_cen));
- pts.push_back (Offset (-x_cen, y_cen));
+ pts.push_back (Offset (shifted_box.x ().at (LEFT), shifted_box.y ().at (DOWN)));
+ pts.push_back (Offset (shifted_box.x ().at (RIGHT), shifted_box.y ().at (DOWN)));
+ pts.push_back (Offset (shifted_box.x ().at (RIGHT), shifted_box.y ().at (UP)));
+ pts.push_back (Offset (shifted_box.x ().at (LEFT), shifted_box.y ().at (UP)));
const Offset rot = complex_exp (Offset (0, a * M_PI / 180.0));
dim_.set_empty ();
for (vsize i = 0; i < pts.size (); i++)
- dim_.add_point (pts[i] * rot + Offset (x_cen, y_cen));
+ dim_.add_point (pts[i] * rot + absolute_off);
+}
+
+/*
+ Rotate this stencil around the point RELATIVE_OFF.
+
+ RELATIVE_OFF is measured in terms of the extent of the stencil, so
+ -1 = LEFT/DOWN edge, 1 = RIGHT/UP edge.
+ */
+void
+Stencil::rotate_degrees (Real a, Offset relative_off)
+{
+ /*
+ * Calculate the center of rotation
+ */
+ const Real x = extent (X_AXIS).linear_combination (relative_off[X_AXIS]);
+ const Real y = extent (Y_AXIS).linear_combination (relative_off[Y_AXIS]);
+ rotate_degrees_absolute (a, Offset (x, y));
}
void
while (a < NO_AXES)
{
if (isinf (o[a])
- || isnan (o[a])
-
- // ugh, hardcoded.
- || fabs (o[a]) > 1e6)
- {
- programming_error (String_convert::form_string ("Improbable offset for stencil: %f staff space", o[a])
- + "\n"
- + "Setting to zero.");
- o[a] = 0.0;
- if (strict_infinity_checking)
- scm_misc_error (__FUNCTION__, "Improbable offset.", SCM_EOL);
- }
+ || isnan (o[a])
+
+ // ugh, hardcoded.
+ || fabs (o[a]) > 1e6)
+ {
+ programming_error (String_convert::form_string ("Improbable offset for stencil: %f staff space", o[a])
+ + "\n"
+ + "Setting to zero.");
+ o[a] = 0.0;
+ if (strict_infinity_checking)
+ scm_misc_error (__FUNCTION__, "Improbable offset.", SCM_EOL);
+ }
incr (a);
}
expr_ = scm_list_n (ly_symbol2scm ("translate-stencil"),
- ly_offset2scm (o),
- expr_, SCM_UNDEFINED);
+ ly_offset2scm (o),
+ expr_, SCM_UNDEFINED);
if (!is_empty ())
dim_.translate (o);
}
translate (o);
}
+void
+Stencil::scale (Real x, Real y)
+{
+ expr_ = scm_list_3 (ly_symbol2scm ("scale-stencil"),
+ scm_list_2 (scm_from_double (x),
+ scm_from_double (y)),
+ expr_);
+ dim_[X_AXIS] *= x;
+ dim_[Y_AXIS] *= y;
+}
+
void
Stencil::add_stencil (Stencil const &s)
{
Real his_extent;
if (i.is_empty ())
{
- programming_error ("Stencil::moved_to_edge: adding empty stencil.");
+ programming_error ("Stencil::add_at_edge: adding empty stencil.");
his_extent = 0.0;
}
else
his_extent = i[-d];
Real offset = (my_extent.is_empty () ? 0.0 : my_extent[d] - his_extent)
- + d * padding;
+ + d * padding;
Stencil toadd (s);
toadd.translate_axis (offset, a);
Stencil::in_color (Real r, Real g, Real b) const
{
Stencil new_stencil (extent_box (),
- scm_list_3 (ly_symbol2scm ("color"),
- scm_list_3 (scm_from_double (r),
- scm_from_double (g),
- scm_from_double (b)),
- expr ()));
+ scm_list_3 (ly_symbol2scm ("color"),
+ scm_list_3 (scm_from_double (r),
+ scm_from_double (g),
+ scm_from_double (b)),
+ expr ()));
return new_stencil;
}
projects / lilypond.git / blobdiff