1 #define INKSCAPE_LPE_RULER_CPP
3 /** \file
4 * LPE <ruler> implementation, see lpe-ruler.cpp.
5 */
7 /*
8 * Authors:
9 * Maximilian Albert
10 *
11 * Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #include "live_effects/lpe-ruler.h"
17 #include <2geom/piecewise.h>
18 #include <2geom/sbasis-geometric.h>
19 #include "inkscape.h"
20 #include "desktop.h"
23 namespace Inkscape {
24 namespace LivePathEffect {
26 static const Util::EnumData<MarkDirType> MarkDirData[] = {
27 {MARKDIR_LEFT , N_("Left"), "left"},
28 {MARKDIR_RIGHT , N_("Right"), "right"},
29 {MARKDIR_BOTH , N_("Both"), "both"},
30 };
31 static const Util::EnumDataConverter<MarkDirType> MarkDirTypeConverter(MarkDirData, sizeof(MarkDirData)/sizeof(*MarkDirData));
33 static const Util::EnumData<BorderMarkType> BorderMarkData[] = {
34 {BORDERMARK_NONE , N_("None"), "none"},
35 {BORDERMARK_START , N_("Start"), "start"},
36 {BORDERMARK_END , N_("End"), "end"},
37 {BORDERMARK_BOTH , N_("Both"), "both"},
38 };
39 static const Util::EnumDataConverter<BorderMarkType> BorderMarkTypeConverter(BorderMarkData, sizeof(BorderMarkData)/sizeof(*BorderMarkData));
41 LPERuler::LPERuler(LivePathEffectObject *lpeobject) :
42 Effect(lpeobject),
43 mark_distance(_("Mark distance"), _("Distance between successive ruler marks"), "mark_distance", &wr, this, 20.0),
44 mark_length(_("Major length"), _("Length of major ruler marks"), "mark_length", &wr, this, 14.0),
45 minor_mark_length(_("Minor length"), _("Length of minor ruler marks"), "minor_mark_length", &wr, this, 7.0),
46 major_mark_steps(_("Major steps"), _("Draw a major mark every ... steps"), "major_mark_steps", &wr, this, 5),
47 shift(_("Shift marks by"), _("Shift marks by this many steps"), "shift", &wr, this, 0),
48 mark_dir(_("Mark direction"), _("Direction of marks (when viewing along the path from start to end)"), "mark_dir", MarkDirTypeConverter, &wr, this, MARKDIR_LEFT),
49 offset(_("Offset"), _("Offset of first mark"), "offset", &wr, this, 0.0),
50 border_marks(_("Border marks"), _("Choose whether to draw marks at the beginning and end of the path"), "border_marks", BorderMarkTypeConverter, &wr, this, BORDERMARK_BOTH)
51 {
52 registerParameter(dynamic_cast<Parameter *>(&mark_distance));
53 registerParameter(dynamic_cast<Parameter *>(&mark_length));
54 registerParameter(dynamic_cast<Parameter *>(&minor_mark_length));
55 registerParameter(dynamic_cast<Parameter *>(&major_mark_steps));
56 registerParameter(dynamic_cast<Parameter *>(&shift));
57 registerParameter(dynamic_cast<Parameter *>(&offset));
58 registerParameter(dynamic_cast<Parameter *>(&mark_dir));
59 registerParameter(dynamic_cast<Parameter *>(&border_marks));
61 major_mark_steps.param_make_integer();
62 major_mark_steps.param_set_range(1, 1000);
63 shift.param_make_integer();
65 mark_length.param_set_increments(1.0, 10.0);
66 minor_mark_length.param_set_increments(1.0, 10.0);
67 offset.param_set_increments(1.0, 10.0);
68 }
70 LPERuler::~LPERuler()
71 {
73 }
75 Geom::Point LPERuler::n_major;
76 Geom::Point LPERuler::n_minor;
78 Geom::Piecewise<Geom::D2<Geom::SBasis> >
79 LPERuler::ruler_mark(Geom::Point const &A, Geom::Point const &n, MarkType const &marktype)
80 {
81 using namespace Geom;
83 n_major = mark_length * n;
84 n_minor = minor_mark_length * n;
86 Point C, D;
87 switch (marktype) {
88 case MARK_MAJOR:
89 C = A;
90 D = A + n_major;
91 if (mark_dir == MARKDIR_BOTH)
92 C -= n_major;
93 break;
94 case MARK_MINOR:
95 C = A;
96 D = A + n_minor;
97 if (mark_dir == MARKDIR_BOTH)
98 C -= n_minor;
99 break;
100 default:
101 // do nothing
102 break;
103 }
105 Piecewise<D2<SBasis> > seg(D2<SBasis>(Linear(C[X], D[X]), Linear(C[Y], D[Y])));
106 return seg;
107 }
109 Geom::Piecewise<Geom::D2<Geom::SBasis> >
110 LPERuler::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)
111 {
112 using namespace Geom;
114 const int mminterval = static_cast<int>(major_mark_steps);
115 const int i_shift = static_cast<int>(shift) % mminterval;
116 int sign = (mark_dir == MARKDIR_RIGHT ? 1 : -1 );
118 Piecewise<D2<SBasis> >output(pwd2_in);
119 Piecewise<D2<SBasis> >speed = derivative(pwd2_in);
120 Piecewise<SBasis> arclength = arcLengthSb(pwd2_in);
121 double totlength = arclength.lastValue();
123 //find at which times to draw a mark:
124 std::vector<double> s_cuts;
125 for (double s = offset; s<totlength; s+=mark_distance){
126 s_cuts.push_back(s);
127 }
128 std::vector<std::vector<double> > roots = multi_roots(arclength, s_cuts);
129 std::vector<double> t_cuts;
130 g_warning("times:");
131 for (unsigned v=0; v<roots.size();v++){
132 //FIXME: 2geom multi_roots solver seem to sometimes "repeat" solutions.
133 //Here, we are supposed to have one and only one solution for each s.
134 if(roots[v].size()>0)
135 t_cuts.push_back(roots[v][0]);
136 }
137 //draw the marks
138 for (unsigned i=0; i<t_cuts.size(); i++){
139 Point A = pwd2_in(t_cuts[i]);
140 Point n = rot90(unit_vector(speed(t_cuts[i])))*sign;
141 if ((i % mminterval) == i_shift) {
142 output.concat (ruler_mark(A, n, MARK_MAJOR));
143 } else {
144 output.concat (ruler_mark(A, n, MARK_MINOR));
145 }
146 }
147 //eventually draw a mark at start
148 if ((border_marks == BORDERMARK_START || border_marks == BORDERMARK_BOTH) && (offset != 0.0 || i_shift != 0)){
149 Point A = pwd2_in.firstValue();
150 Point n = rot90(unit_vector(speed.firstValue()))*sign;
151 output.concat (ruler_mark(A, n, MARK_MAJOR));
152 }
153 //eventually draw a mark at end
154 if (border_marks == BORDERMARK_END || border_marks == BORDERMARK_BOTH){
155 Point A = pwd2_in.lastValue();
156 Point n = rot90(unit_vector(speed.lastValue()))*sign;
157 output.concat (ruler_mark(A, n, MARK_MAJOR));
158 }
160 return output;
161 }
163 } //namespace LivePathEffect
164 } /* namespace Inkscape */
166 /*
167 Local Variables:
168 mode:c++
169 c-file-style:"stroustrup"
170 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
171 indent-tabs-mode:nil
172 fill-column:99
173 End:
174 */
175 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :