{
Item *me = (Item *)unsmob_grob (smob);
+ Item *left_head = get_left_head (me);
+ Item *right_head = get_right_head (me);
+ if (!left_head || !right_head)
+ {
+ warning (_ ("junking lonely porrectus"));
+ me->suicide ();
+ return SCM_EOL;
+ }
+
SCM scm_style = me->get_grob_property ("style");
String style;
if ((gh_symbol_p (scm_style)) && (scm_style != SCM_EOL))
if (!stem_direction)
stem_direction = DOWN;
- Item *left_head = get_left_head (me);
- Item *right_head = get_right_head (me);
- if (!left_head || !right_head)
+ bool auto_properties = to_boolean (me->get_grob_property ("auto-properties"));
+ if (auto_properties)
+ // determine add_stem and stem_direction automatically from durations
{
- warning (_ ("junking lonely porrectus"));
- me->suicide ();
- return SCM_EOL;
+ if (String::compare_i (style, "mensural") != 0)
+ warning (String("auto-property should be used for\r\n") +
+ String("mensural style porrectus only; trying anyway"));
+
+ int left_duration =
+ gh_scm2int (left_head->get_grob_property ("duration-log"));
+ int right_duration =
+ gh_scm2int (right_head->get_grob_property ("duration-log"));
+
+ if ((left_duration == -1) && (right_duration == -1))
+ {
+ // brevis -- brevis:
+ // cum proprietate et sine perfectione (c.s.)
+ add_stem = true;
+ stem_direction = DOWN;
+ }
+ else if ((left_duration == -2) && (right_duration == -1))
+ {
+ // longa -- brevis:
+ // sine proprietate et sine perfectione (s.s.)
+ add_stem = false;
+ }
+ else if ((left_duration == 0) && (right_duration == 0))
+ {
+ // semibrevis -- semibrevis:
+ // cum opposita proprietate (c.o.p.)
+ add_stem = true;
+ stem_direction = UP;
+ }
+ else
+ {
+ warning (String("auto-property: failed determining porrectus\r\n") +
+ String("properties due to improper durations; ") +
+ String("using user-supplied properties"));
+ }
}
Real left_position_f = Staff_symbol_referencer::position_f (left_head);
bool add_stem,
Direction stem_direction)
{
- Real space = Staff_symbol_referencer::staff_space (me);
- Molecule molecule = Molecule ();
-
if (interval >= 0.0)
{
warning (_ ("ascending vaticana style porrectus"));
}
+ Real space = Staff_symbol_referencer::staff_space (me);
+ Molecule molecule = Molecule ();
+ Real right_height = 0.6 * space;
+
+ // Compensate thickness that appears to be smaller in steep section
+ // of bend.
+ Real left_height = right_height + min (0.12 * abs(interval), 0.3) * space;
+
if (add_stem)
{
bool consider_interval =
stem_direction * interval > 0.0;
- Interval stem_box_x (-thickness/2, +thickness/2);
+ Interval stem_box_x (0, thickness);
Interval stem_box_y;
if (consider_interval)
- {
- Real y_length = interval / 2.0;
- if (y_length < 1.2 * space)
- y_length = 1.2 * space;
+ {
+ Real y_length = max (abs(interval)/2.0*space +
+ (right_height-left_height),
+ 1.2*space);
stem_box_y = Interval (0, y_length);
}
else
Real y_correction =
(stem_direction == UP) ?
- 0.3 * space :
- - 0.3 * space - stem_box_y.length();
+ +0.5*left_height :
+ -0.5*left_height - stem_box_y.length();
Box stem_box (stem_box_x, stem_box_y);
Molecule stem = Lookup::filledbox (stem_box);
molecule.add_molecule(stem);
}
- Box vertical_edge (Interval (-thickness/2, +thickness/2),
- Interval (-4*thickness/2, +4*thickness/2));
- Molecule left_edge = Lookup::filledbox (vertical_edge);
- Molecule right_edge = Lookup::filledbox (vertical_edge);
- right_edge.translate_axis (width, X_AXIS);
- right_edge.translate_axis (interval / 2.0, Y_AXIS);
- molecule.add_molecule(left_edge);
- molecule.add_molecule(right_edge);
-
- Bezier bezier;
- bezier.control_[0] = Offset (0.00 * width, 0.0);
- bezier.control_[1] = Offset (0.33 * width, interval / 2.0);
- bezier.control_[2] = Offset (0.66 * width, interval / 2.0);
- bezier.control_[3] = Offset (1.00 * width, interval / 2.0);
-
- Molecule slice;
- slice = Lookup::slur (bezier, 0.0, thickness);
- slice.translate_axis (-3 * thickness/2, Y_AXIS);
- molecule.add_molecule (slice);
+ // Compensate optical illusion regarding vertical position of left
+ // and right endings due to curved shape.
+ Real ypos_correction = -0.1*space * sign(interval);
+ Real interval_correction = 0.2*space * sign(interval);
+ Real corrected_interval = interval*space + interval_correction;
+
+ // middle curve of vaticana style porrectus
+ Bezier curve;
+ curve.control_[0] = Offset (0.00 * width, 0.0);
+ curve.control_[1] = Offset (0.33 * width, corrected_interval / 2.0);
+ curve.control_[2] = Offset (0.66 * width, corrected_interval / 2.0);
+ curve.control_[3] = Offset (1.00 * width, corrected_interval / 2.0);
+
+ Bezier top_curve = curve, bottom_curve = curve;
+ for (int i = 0; i < 4; i++)
+ {
+ Real thickness = 0.33 * ((3 - i)*left_height + i*right_height);
+ top_curve.control_[i] += Offset (0, +0.5*thickness);
+ bottom_curve.control_[i] += Offset (0, -0.5*thickness);
+ }
+
if (solid)
- for (int i = -2; i < +2; i++)
- {
- slice = Lookup::slur (bezier, 0.0, thickness);
- slice.translate_axis (i * thickness/2, Y_AXIS);
- molecule.add_molecule (slice);
- }
- slice = Lookup::slur (bezier, 0.0, thickness);
- slice.translate_axis (+3 * thickness/2, Y_AXIS);
- molecule.add_molecule (slice);
+ {
+ Molecule solid_head =
+ brew_bezier_sandwich (top_curve, bottom_curve);
+ molecule.add_molecule (solid_head);
+ }
+ else // outline
+ {
+ Bezier inner_top_curve = top_curve;
+ inner_top_curve.translate (Offset (0.0, -thickness));
+ Molecule top_edge =
+ brew_bezier_sandwich (top_curve, inner_top_curve);
+ molecule.add_molecule(top_edge);
+ Bezier inner_bottom_curve = bottom_curve;
+ inner_bottom_curve.translate (Offset (0.0, +thickness));
+ Molecule bottom_edge =
+ brew_bezier_sandwich (bottom_curve, inner_bottom_curve);
+ molecule.add_molecule(bottom_edge);
+
+ // TODO: Use horizontal slope with proper slope value rather
+ // than filled box for left edge, since the filled box stands
+ // out from the porrectus shape if the interval is big and the
+ // line thickness small. The difficulty here is to compute a
+ // proper slope value, as it should roughly be equal with the
+ // slope of the left end of the bezier curve.
+ Box left_edge_box (Interval (0, thickness),
+ Interval (-0.5*left_height, +0.5*left_height));
+ Molecule left_edge = Lookup::filledbox (left_edge_box);
+ molecule.add_molecule(left_edge);
+
+ Box right_edge_box (Interval (-thickness, 0),
+ Interval (-0.5*right_height, +0.5*right_height));
+ Molecule right_edge = Lookup::filledbox (right_edge_box);
+ right_edge.translate_axis (width, X_AXIS);
+ right_edge.translate_axis (corrected_interval / 2.0, Y_AXIS);
+ molecule.add_molecule(right_edge);
+ }
+ molecule.translate_axis (ypos_correction, Y_AXIS);
return molecule;
}
Direction stem_direction)
{
Real space = Staff_symbol_referencer::staff_space (me);
+ Real height = 0.6 * space;
Molecule molecule = Molecule ();
if (add_stem)
{
- // Uugh. This is currently the same as in
- // brew_vaticana_molecule, but may eventually be changed.
-
bool consider_interval =
stem_direction * interval > 0.0;
if (consider_interval)
{
- Real y_length = interval / 2.0;
- if (y_length < 1.2 * space)
- y_length = 1.2 * space;
+ Real y_length = max (interval/2.0*space, 1.2*space);
stem_box_y = Interval (0, y_length);
}
else
Real y_correction =
(stem_direction == UP) ?
- 0.3 * space :
- - 0.3 * space - stem_box_y.length();
+ +0.5*height :
+ -0.5*height - stem_box_y.length();
Box stem_box (stem_box_x, stem_box_y);
Molecule stem = Lookup::filledbox (stem_box);
molecule.add_molecule(stem);
}
- Real slope = (interval / 2.0) / width;
+ Real slope = (interval / 2.0 * space) / width;
// Compensate optical illusion regarding vertical position of left
// and right endings due to slope.
if (solid)
{
Molecule solid_head =
- brew_horizontal_slope (width, corrected_slope, 0.6*space);
+ brew_horizontal_slope (width, corrected_slope, height);
molecule.add_molecule (solid_head);
}
- else
+ else // outline
{
Molecule left_edge =
- brew_horizontal_slope (thickness, corrected_slope, 0.6*space);
+ brew_horizontal_slope (thickness, corrected_slope, height);
molecule.add_molecule(left_edge);
Molecule right_edge =
- brew_horizontal_slope (thickness, corrected_slope, 0.6*space);
+ brew_horizontal_slope (thickness, corrected_slope, height);
right_edge.translate_axis (width-thickness, X_AXIS);
right_edge.translate_axis (corrected_slope * (width-thickness), Y_AXIS);
molecule.add_molecule(right_edge);
Molecule bottom_edge =
brew_horizontal_slope (width, corrected_slope, thickness);
- bottom_edge.translate_axis (-0.3*space, Y_AXIS);
+ bottom_edge.translate_axis (-0.5*height, Y_AXIS);
molecule.add_molecule (bottom_edge);
Molecule top_edge =
brew_horizontal_slope (width, corrected_slope, thickness);
- top_edge.translate_axis (+0.3*space, Y_AXIS);
+ top_edge.translate_axis (+0.5*height, Y_AXIS);
molecule.add_molecule (top_edge);
}
molecule.translate_axis (ypos_correction, Y_AXIS);
return molecule;
}
+/*
+ * Bezier Sandwich:
+ *
+ * .|
+ * . |
+ * top . |
+ * . curve |
+ * . |
+ * . |
+ * . |
+ * | |
+ * | .|
+ * | .
+ * | bottom .
+ * | . curve
+ * | .
+ * | .
+ * | .
+ * | .
+ * |.
+ * |
+ *
+ */
+// TODO: Move this to class Lookup?
+Molecule
+Porrectus::brew_bezier_sandwich (Bezier top_curve, Bezier bottom_curve)
+{
+ /*
+ Need the weird order b.o. the way PS want its arguments
+ */
+ SCM list = SCM_EOL;
+ list = gh_cons (ly_offset2scm (bottom_curve.control_[3]), list);
+ list = gh_cons (ly_offset2scm (bottom_curve.control_[0]), list);
+ list = gh_cons (ly_offset2scm (bottom_curve.control_[1]), list);
+ list = gh_cons (ly_offset2scm (bottom_curve.control_[2]), list);
+ list = gh_cons (ly_offset2scm (top_curve.control_[0]), list);
+ list = gh_cons (ly_offset2scm (top_curve.control_[3]), list);
+ list = gh_cons (ly_offset2scm (top_curve.control_[2]), list);
+ list = gh_cons (ly_offset2scm (top_curve.control_[1]), list);
+
+ SCM horizontal_bend = scm_list_n (ly_symbol2scm ("bezier-sandwich"),
+ ly_quote_scm (list),
+ gh_double2scm (0.0),
+ SCM_UNDEFINED);
+
+ Interval x_extent = top_curve.extent (X_AXIS);
+ x_extent.unite (bottom_curve.extent (X_AXIS));
+ Interval y_extent = top_curve.extent (Y_AXIS);
+ y_extent.unite (bottom_curve.extent (Y_AXIS));
+ Box b (x_extent, y_extent);
+
+ return Molecule (b, horizontal_bend);
+}
+
/*
* Horizontal Slope:
*
* /| ^
* / | |
- * / | | thickness
+ * / | | height
* / | |
* / | v
* | /
* <----->
* width
*/
+// TODO: Move this to class Lookup?
Molecule
-Porrectus::brew_horizontal_slope(Real width, Real slope, Real thickness)
+Porrectus::brew_horizontal_slope (Real width, Real slope, Real height)
{
SCM width_scm = gh_double2scm (width);
SCM slope_scm = gh_double2scm (slope);
- SCM thickness_scm = gh_double2scm (thickness);
- SCM horizontal_slope = scm_listify (ly_symbol2scm ("beam"),
- width_scm, slope_scm,
- thickness_scm, SCM_UNDEFINED);
+ SCM height_scm = gh_double2scm (height);
+ SCM horizontal_slope = scm_list_n (ly_symbol2scm ("beam"),
+ width_scm, slope_scm,
+ height_scm, SCM_UNDEFINED);
Box b (Interval (0, width),
- Interval (-thickness/2, thickness/2 + width*slope));
+ Interval (-height/2, height/2 + width*slope));
return Molecule (b, horizontal_slope);
}
projects / lilypond.git / blobdiff