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index 4b41752967b6e41df92b098757565a16c89e7416..e51b03d15bf43e892c9caed579e9f7290f6269cd 100644 (file)
/*
* Authors:
* Maximilian Albert
- * Johan Engelen
*
* Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>
*
#include "live_effects/lpe-ruler.h"
#include <2geom/piecewise.h>
+#include <2geom/sbasis-geometric.h>
#include "inkscape.h"
#include "desktop.h"
+
namespace Inkscape {
namespace LivePathEffect {
};
static const Util::EnumDataConverter<MarkDirType> MarkDirTypeConverter(MarkDirData, sizeof(MarkDirData)/sizeof(*MarkDirData));
+static const Util::EnumData<BorderMarkType> BorderMarkData[] = {
+ {BORDERMARK_NONE , N_("None"), "none"},
+ {BORDERMARK_START , N_("Start"), "start"},
+ {BORDERMARK_END , N_("End"), "end"},
+ {BORDERMARK_BOTH , N_("Both"), "both"},
+};
+static const Util::EnumDataConverter<BorderMarkType> BorderMarkTypeConverter(BorderMarkData, sizeof(BorderMarkData)/sizeof(*BorderMarkData));
+
LPERuler::LPERuler(LivePathEffectObject *lpeobject) :
Effect(lpeobject),
- mark_distance(_("Mark distance"), _("Distance between successive ruler marks"), "mark_distance", &wr, this, 20.0),
- mark_length(_("Major length"), _("Length of major ruler marks"), "mark_length", &wr, this, 14.0),
- minor_mark_length(_("Minor length"), _("Length of minor ruler marks"), "minor_mark_length", &wr, this, 7.0),
- major_mark_steps(_("Major steps"), _("Draw a major mark every ... steps"), "major_mark_steps", &wr, this, 5),
- shift(_("Shift marks by"), _("Shift marks by this many steps"), "shift", &wr, this, 0),
- mark_dir(_("Mark direction"), _("Direction of marks (when viewing along the path from start to end)"), "mark_dir", MarkDirTypeConverter, &wr, this, MARKDIR_LEFT),
- offset(_("Offset"), _("Offset of first mark"), "offset", &wr, this, 0.0),
- draw_border_marks(_("Draw border marks?"), _("Check this to draw marks at the beginning and end of the path (even if this means that the distance to adjacent marks is smaller than usual)"), "draw_border_marks", &wr, this, true)
+ mark_distance(_("Mark distance:"), _("Distance between successive ruler marks"), "mark_distance", &wr, this, 20.0),
+ unit(_("Unit:"), _("Unit"), "unit", &wr, this),
+ mark_length(_("Major length:"), _("Length of major ruler marks"), "mark_length", &wr, this, 14.0),
+ minor_mark_length(_("Minor length:"), _("Length of minor ruler marks"), "minor_mark_length", &wr, this, 7.0),
+ major_mark_steps(_("Major steps:"), _("Draw a major mark every ... steps"), "major_mark_steps", &wr, this, 5),
+ shift(_("Shift marks by:"), _("Shift marks by this many steps"), "shift", &wr, this, 0),
+ mark_dir(_("Mark direction:"), _("Direction of marks (when viewing along the path from start to end)"), "mark_dir", MarkDirTypeConverter, &wr, this, MARKDIR_LEFT),
+ offset(_("Offset:"), _("Offset of first mark"), "offset", &wr, this, 0.0),
+ border_marks(_("Border marks:"), _("Choose whether to draw marks at the beginning and end of the path"), "border_marks", BorderMarkTypeConverter, &wr, this, BORDERMARK_BOTH)
{
+ registerParameter(dynamic_cast<Parameter *>(&unit));
registerParameter(dynamic_cast<Parameter *>(&mark_distance));
registerParameter(dynamic_cast<Parameter *>(&mark_length));
registerParameter(dynamic_cast<Parameter *>(&minor_mark_length));
registerParameter(dynamic_cast<Parameter *>(&shift));
registerParameter(dynamic_cast<Parameter *>(&offset));
registerParameter(dynamic_cast<Parameter *>(&mark_dir));
- registerParameter(dynamic_cast<Parameter *>(&draw_border_marks));
+ registerParameter(dynamic_cast<Parameter *>(&border_marks));
major_mark_steps.param_make_integer();
major_mark_steps.param_set_range(1, 1000);
Geom::Point LPERuler::n_minor;
Geom::Piecewise<Geom::D2<Geom::SBasis> >
-LPERuler::ruler_mark(Geom::Point const &A, Geom::Point const &n, MarkType marktype)
+LPERuler::ruler_mark(Geom::Point const &A, Geom::Point const &n, MarkType const &marktype)
{
using namespace Geom;
- n_major = mark_length * n;
- n_minor = minor_mark_length * n;
+ gboolean success;
+ double real_mark_length = mark_length;
+ success = sp_convert_distance(&real_mark_length, unit, &sp_unit_get_by_id(SP_UNIT_PX));
+ double real_minor_mark_length = minor_mark_length;
+ success = sp_convert_distance(&real_minor_mark_length, unit, &sp_unit_get_by_id(SP_UNIT_PX));
+
+ n_major = real_mark_length * n;
+ n_minor = real_minor_mark_length * n;
+ if (mark_dir == MARKDIR_BOTH) {
+ n_major = n_major * 0.5;
+ n_minor = n_minor * 0.5;
+ }
Point C, D;
switch (marktype) {
case MARK_MAJOR:
C = A;
- D = A + mark_length * n;
+ D = A + n_major;
if (mark_dir == MARKDIR_BOTH)
C -= n_major;
break;
@@ -102,40 +123,71 @@ LPERuler::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_i
{
using namespace Geom;
- Point A(pwd2_in.firstValue());
- Point B(pwd2_in.lastValue());
- double path_length = L2(B - A);
-
- Piecewise<D2<SBasis> >output(D2<SBasis>(Linear(A[X], B[X]), Linear(A[Y], B[Y])));
-
- Point dir(unit_vector(B - A));
- Point n(-rot90(dir));
- if (mark_dir == MARKDIR_RIGHT) {
- n *= -1.0;
- }
-
- int j = 0;
const int mminterval = static_cast<int>(major_mark_steps);
- const int j_shift = static_cast<int>(shift) % mminterval;
-
- /* draw the ruler */
- if (draw_border_marks && (offset != 0.0 || j_shift != 0))
- output.concat (ruler_mark(A, n, MARK_MAJOR));
- for (double i = offset; i < path_length; i += mark_distance, ++j) {
- if ((j % mminterval) == j_shift) {
- output.concat (ruler_mark(A + dir * i, n, MARK_MAJOR));
+ const int i_shift = static_cast<int>(shift) % mminterval;
+ int sign = (mark_dir == MARKDIR_RIGHT ? 1 : -1 );
+
+ Piecewise<D2<SBasis> >output(pwd2_in);
+ Piecewise<D2<SBasis> >speed = derivative(pwd2_in);
+ Piecewise<SBasis> arclength = arcLengthSb(pwd2_in);
+ double totlength = arclength.lastValue();
+
+ //find at which times to draw a mark:
+ std::vector<double> s_cuts;
+
+ double real_mark_distance = mark_distance;
+ gboolean success = sp_convert_distance(&real_mark_distance, unit, &sp_unit_get_by_id(SP_UNIT_PX));
+
+ double real_offset = offset;
+ success = sp_convert_distance(&real_offset, unit, &sp_unit_get_by_id(SP_UNIT_PX));
+ for (double s = real_offset; s<totlength; s+=real_mark_distance){
+ s_cuts.push_back(s);
+ }
+ std::vector<std::vector<double> > roots = multi_roots(arclength, s_cuts);
+ std::vector<double> t_cuts;
+ for (unsigned v=0; v<roots.size();v++){
+ //FIXME: 2geom multi_roots solver seem to sometimes "repeat" solutions.
+ //Here, we are supposed to have one and only one solution for each s.
+ if(roots[v].size()>0)
+ t_cuts.push_back(roots[v][0]);
+ }
+ //draw the marks
+ for (unsigned i=0; i<t_cuts.size(); i++){
+ Point A = pwd2_in(t_cuts[i]);
+ Point n = rot90(unit_vector(speed(t_cuts[i])))*sign;
+ if ((i % mminterval) == i_shift) {
+ output.concat (ruler_mark(A, n, MARK_MAJOR));
} else {
- output.concat (ruler_mark(A + dir * i, n, MARK_MINOR));
+ output.concat (ruler_mark(A, n, MARK_MINOR));
}
}
- if (draw_border_marks)
- output.concat (ruler_mark(B, n, MARK_MAJOR));
+ //eventually draw a mark at start
+ if ((border_marks == BORDERMARK_START || border_marks == BORDERMARK_BOTH) && (offset != 0.0 || i_shift != 0)){
+ Point A = pwd2_in.firstValue();
+ Point n = rot90(unit_vector(speed.firstValue()))*sign;
+ output.concat (ruler_mark(A, n, MARK_MAJOR));
+ }
+ //eventually draw a mark at end
+ if (border_marks == BORDERMARK_END || border_marks == BORDERMARK_BOTH){
+ Point A = pwd2_in.lastValue();
+ Point n = rot90(unit_vector(speed.lastValue()))*sign;
+ //speed.lastValue() is somtimes wrong when the path is closed: a tiny line seg might added at the end to fix rounding errors...
+ //TODO: Find a better fix!! (How do we know if the path was closed?)
+ if ( A == pwd2_in.firstValue() &&
+ speed.segs.size() > 1 &&
+ speed.segs.back()[X].size() <= 1 &&
+ speed.segs.back()[Y].size() <= 1 &&
+ speed.segs.back()[X].tailError(0) <= 1e-10 &&
+ speed.segs.back()[Y].tailError(0) <= 1e-10
+ ){
+ n = rot90(unit_vector(speed.segs[speed.segs.size()-2].at1()))*sign;
+ }
+ output.concat (ruler_mark(A, n, MARK_MAJOR));
+ }
return output;
}
-/* ######################## */
-
} //namespace LivePathEffect
} /* namespace Inkscape */