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-#define INKSCAPE_LPE_EXPRESSION_CPP\r
-/** \file\r
- * SVG <skeleton> implementation, used as an example for a base starting class\r
- * when implementing new LivePathEffects.\r
- *\r
- */\r
-/*\r
- * Authors:\r
- * Johan Engelen\r
-*\r
-* Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>\r
- *\r
- * Released under GNU GPL, read the file 'COPYING' for more information\r
- */\r
-\r
-#include "live_effects/lpe-curvestitch.h"\r
-#include "display/curve.h"\r
-#include <libnr/n-art-bpath.h>\r
-\r
-#include <2geom/path.h>\r
-#include <2geom/piecewise.h>\r
-#include <2geom/sbasis.h>\r
-#include <2geom/sbasis-geometric.h>\r
-#include <2geom/bezier-to-sbasis.h>\r
-#include <2geom/sbasis-to-bezier.h>\r
-#include <2geom/d2.h>\r
-#include <2geom/matrix.h>\r
-\r
-\r
-#include "ui/widget/scalar.h"\r
-#include "libnr/nr-values.h"\r
-\r
-namespace Inkscape {\r
-namespace LivePathEffect {\r
-\r
-using namespace Geom;\r
-\r
-LPECurveStitch::LPECurveStitch(LivePathEffectObject *lpeobject) :\r
- Effect(lpeobject),\r
- strokepath(_("Stroke path"), _("The path that will be stroked, whatever, think of good text here."), "strokepath", &wr, this, "M0,0 L1,0"),\r
- nrofpaths(_("Nr of paths"), _("The number of paths that will be generated."), "count", &wr, this, 5),\r
- startpoint_variation(_("Startpoint variation"), _("..."), "startpoint_variation", &wr, this, 0),\r
- endpoint_variation(_("Endpoint variation"), _("..."), "endpoint_variation", &wr, this, 0),\r
- scale_y(_("Scale stroke y"), _("Scale the height of the stroke path with its length"), "scale_stroke_y", &wr, this, false)\r
-{\r
- registerParameter( dynamic_cast<Parameter *>(&nrofpaths) );\r
- registerParameter( dynamic_cast<Parameter *>(&startpoint_variation) );\r
- registerParameter( dynamic_cast<Parameter *>(&endpoint_variation) );\r
- registerParameter( dynamic_cast<Parameter *>(&strokepath) );\r
- registerParameter( dynamic_cast<Parameter *>(&scale_y) );\r
-\r
- nrofpaths.param_make_integer();\r
- nrofpaths.param_set_range(2, NR_HUGE);\r
-\r
-// startpoint_variation.param_set_range(-NR_HUGE, 1);\r
-// endpoint_variation.param_set_range(-1, NR_HUGE);\r
-}\r
-\r
-LPECurveStitch::~LPECurveStitch()\r
-{\r
-\r
-}\r
-\r
-std::vector<Geom::Path>\r
-LPECurveStitch::doEffect (std::vector<Geom::Path> & path_in)\r
-{\r
- if (path_in.size() >= 2) {\r
- startpoint_variation.resetRandomizer();\r
- endpoint_variation.resetRandomizer();\r
-\r
- D2<Piecewise<SBasis> > stroke = make_cuts_independant(strokepath);\r
- Interval bndsStroke = bounds_exact(stroke[0]);\r
- gdouble scaling = bndsStroke.max() - bndsStroke.min();\r
- Interval bndsStrokeY = bounds_exact(stroke[1]);\r
- Point stroke_origin(bndsStroke.min(), (bndsStrokeY.max()+bndsStrokeY.min())/2);\r
-\r
- std::vector<Geom::Path> path_out (nrofpaths);\r
-\r
- // do this for all permutations if there are more than 2 paths? realllly cool!\r
- Piecewise<D2<SBasis> > A = arc_length_parametrization(Piecewise<D2<SBasis> >(path_in[0].toPwSb()),2,.1);\r
- Piecewise<D2<SBasis> > B = arc_length_parametrization(Piecewise<D2<SBasis> >(path_in[1].toPwSb()),2,.1);\r
- Interval bndsA = A.domain();\r
- Interval bndsB = B.domain();\r
- gdouble incrementA = (bndsA.max()-bndsA.min()) / (nrofpaths-1);\r
- gdouble incrementB = (bndsB.max()-bndsB.min()) / (nrofpaths-1);\r
- gdouble tA = bndsA.min();\r
- gdouble tB = bndsB.min();\r
- for (int i = 0; i < nrofpaths; i++) {\r
- Point start = A(tA);\r
- Point end = B(tB);\r
- if (startpoint_variation.get_value() != 0)\r
- start = start + startpoint_variation * (end - start);\r
- if (endpoint_variation.get_value() != 0)\r
- end = end + endpoint_variation * (end - start);\r
- \r
- Matrix transform;\r
- transform.setXAxis( (end-start) / scaling );\r
- gdouble scaling_y = scale_y.get_value() ? L2(end-start)/scaling : 1.0;\r
- transform.setYAxis( rot90(unit_vector(end-start)) * scaling_y);\r
- transform.setTranslation( start );\r
- Piecewise<D2<SBasis> > pwd2_out = (strokepath-stroke_origin) * transform;\r
- // add stuff to one big pw<d2<sbasis> > and then outside the loop convert to path?\r
- std::vector<Path> result = Geom::path_from_piecewise(pwd2_out, LPE_CONVERSION_TOLERANCE);\r
- path_out[i] = result[0];\r
- tA += incrementA;\r
- tB += incrementB;\r
- }\r
-\r
- return path_out;\r
- } else {\r
- return path_in;\r
- }\r
-}\r
-\r
-} //namespace LivePathEffect\r
-} /* namespace Inkscape */\r
-\r
-/*\r
- Local Variables:\r
- mode:c++\r
- c-file-style:"stroustrup"\r
- c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))\r
- indent-tabs-mode:nil\r
- fill-column:99\r
- End:\r
-*/\r
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :\r
+#define INKSCAPE_LPE_CURVESTITCH_CPP
+/** \file
+ * LPE Curve Stitching implementation, used as an example for a base starting class
+ * when implementing new LivePathEffects.
+ *
+ */
+/*
+ * Authors:
+ * Johan Engelen
+*
+* Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "live_effects/lpe-curvestitch.h"
+#include "display/curve.h"
+#include <libnr/n-art-bpath.h>
+#include "sp-item.h"
+#include "sp-path.h"
+#include "live_effects/n-art-bpath-2geom.h"
+#include "xml/repr.h"
+
+#include <2geom/path.h>
+#include <2geom/piecewise.h>
+#include <2geom/sbasis.h>
+#include <2geom/sbasis-geometric.h>
+#include <2geom/bezier-to-sbasis.h>
+#include <2geom/sbasis-to-bezier.h>
+#include <2geom/d2.h>
+#include <2geom/matrix.h>
+
+
+#include "ui/widget/scalar.h"
+#include "libnr/nr-values.h"
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+using namespace Geom;
+
+LPECurveStitch::LPECurveStitch(LivePathEffectObject *lpeobject) :
+ Effect(lpeobject),
+ strokepath(_("Stroke path"), _("The path that will be used as stitch."), "strokepath", &wr, this, "M0,0 L1,0"),
+ nrofpaths(_("Number of paths"), _("The number of paths that will be generated."), "count", &wr, this, 5),
+ startpoint_edge_variation(_("Start edge variance"), _("The amount of random jitter to move the start points of the stitches inside & outside the guide path"), "startpoint_edge_variation", &wr, this, 0),
+ startpoint_spacing_variation(_("Start spacing variance"), _("The amount of random shifting to move the start points of the stitches back & forth along the guide path"), "startpoint_spacing_variation", &wr, this, 0),
+ endpoint_edge_variation(_("End edge variance"), _("The amount of randomness that moves the end points of the stitches inside & outside the guide path"), "endpoint_edge_variation", &wr, this, 0),
+ endpoint_spacing_variation(_("End spacing variance"), _("The amount of random shifting to move the end points of the stitches back & forth along the guide path"), "endpoint_spacing_variation", &wr, this, 0),
+ prop_scale(_("Scale width"), _("Scaling of the width of the stroke path"), "prop_scale", &wr, this, 1),
+ scale_y_rel(_("Scale width relative"), _("Scale the width of the stroke path relative to its length"), "scale_y_rel", &wr, this, false)
+{
+ registerParameter( dynamic_cast<Parameter *>(&nrofpaths) );
+ registerParameter( dynamic_cast<Parameter *>(&startpoint_edge_variation) );
+ registerParameter( dynamic_cast<Parameter *>(&startpoint_spacing_variation) );
+ registerParameter( dynamic_cast<Parameter *>(&endpoint_edge_variation) );
+ registerParameter( dynamic_cast<Parameter *>(&endpoint_spacing_variation) );
+ registerParameter( dynamic_cast<Parameter *>(&strokepath) );
+ registerParameter( dynamic_cast<Parameter *>(&prop_scale) );
+ registerParameter( dynamic_cast<Parameter *>(&scale_y_rel) );
+
+ nrofpaths.param_make_integer();
+ nrofpaths.param_set_range(2, NR_HUGE);
+
+ prop_scale.param_set_digits(3);
+ prop_scale.param_set_increments(0.01, 0.10);
+}
+
+LPECurveStitch::~LPECurveStitch()
+{
+
+}
+
+std::vector<Geom::Path>
+LPECurveStitch::doEffect_path (std::vector<Geom::Path> & path_in)
+{
+ if (path_in.size() >= 2) {
+ startpoint_edge_variation.resetRandomizer();
+ endpoint_edge_variation.resetRandomizer();
+ startpoint_spacing_variation.resetRandomizer();
+ endpoint_spacing_variation.resetRandomizer();
+
+ D2<Piecewise<SBasis> > stroke = make_cuts_independant(strokepath);
+ Interval bndsStroke = bounds_exact(stroke[0]);
+ gdouble scaling = bndsStroke.max() - bndsStroke.min();
+ Interval bndsStrokeY = bounds_exact(stroke[1]);
+ Point stroke_origin(bndsStroke.min(), (bndsStrokeY.max()+bndsStrokeY.min())/2);
+
+ std::vector<Geom::Path> path_out;
+
+ // do this for all permutations (ii,jj) if there are more than 2 paths? realllly cool!
+ for (int ii = 0 ; ii < path_in.size() - 1; ii++)
+ for (int jj = ii+1; jj < path_in.size(); jj++)
+ {
+ Piecewise<D2<SBasis> > A = arc_length_parametrization(Piecewise<D2<SBasis> >(path_in[ii].toPwSb()),2,.1);
+ Piecewise<D2<SBasis> > B = arc_length_parametrization(Piecewise<D2<SBasis> >(path_in[jj].toPwSb()),2,.1);
+ Interval bndsA = A.domain();
+ Interval bndsB = B.domain();
+ gdouble incrementA = (bndsA.max()-bndsA.min()) / (nrofpaths-1);
+ gdouble incrementB = (bndsB.max()-bndsB.min()) / (nrofpaths-1);
+ gdouble tA = bndsA.min();
+ gdouble tB = bndsB.min();
+ gdouble tAclean = tA; // the tA without spacing_variation
+ gdouble tBclean = tB; // the tB without spacing_variation
+
+ for (int i = 0; i < nrofpaths; i++) {
+ Point start = A(tA);
+ Point end = B(tB);
+ if (startpoint_edge_variation.get_value() != 0)
+ start = start + (startpoint_edge_variation - startpoint_edge_variation.get_value()/2) * (end - start);
+ if (endpoint_edge_variation.get_value() != 0)
+ end = end + (endpoint_edge_variation - endpoint_edge_variation.get_value()/2)* (end - start);
+
+ if (!Geom::are_near(start,end)) {
+ gdouble scaling_y = 1.0;
+ if (scale_y_rel.get_value()) {
+ scaling_y = (L2(end-start)/scaling)*prop_scale;
+ } else {
+ scaling_y = prop_scale;
+ }
+
+ Matrix transform;
+ transform.setXAxis( (end-start) / scaling );
+ transform.setYAxis( rot90(unit_vector(end-start)) * scaling_y);
+ transform.setTranslation( start );
+ Piecewise<D2<SBasis> > pwd2_out = (strokepath-stroke_origin) * transform;
+
+ // add stuff to one big pw<d2<sbasis> > and then outside the loop convert to path?
+ // No: this way, the separate result paths are kept separate which might come in handy some time!
+ std::vector<Geom::Path> result = Geom::path_from_piecewise(pwd2_out, LPE_CONVERSION_TOLERANCE);
+ path_out.push_back(result[0]);
+ }
+ gdouble svA = startpoint_spacing_variation - startpoint_spacing_variation.get_value()/2;
+ gdouble svB = endpoint_spacing_variation - endpoint_spacing_variation.get_value()/2;
+ tAclean += incrementA;
+ tBclean += incrementB;
+ tA = tAclean + incrementA * svA;
+ tB = tBclean + incrementB * svB;
+ if (tA > bndsA.max())
+ tA = bndsA.max();
+ if (tB > bndsB.max())
+ tB = bndsB.max();
+ }
+ }
+
+ return path_out;
+ } else {
+ return path_in;
+ }
+}
+
+void
+LPECurveStitch::resetDefaults(SPItem * item)
+{
+ if (!SP_IS_PATH(item)) return;
+
+ using namespace Geom;
+
+ // set the stroke path to run horizontally in the middle of the bounding box of the original path
+ Piecewise<D2<SBasis> > pwd2;
+ std::vector<Geom::Path> temppath = SVGD_to_2GeomPath( SP_OBJECT_REPR(item)->attribute("inkscape:original-d"));
+ for (unsigned int i=0; i < temppath.size(); i++) {
+ pwd2.concat( temppath[i].toPwSb() );
+ }
+
+ D2<Piecewise<SBasis> > d2pw = make_cuts_independant(pwd2);
+ Interval bndsX = bounds_exact(d2pw[0]);
+ Interval bndsY = bounds_exact(d2pw[1]);
+ Point start(bndsX.min(), (bndsY.max()+bndsY.min())/2);
+ Point end(bndsX.max(), (bndsY.max()+bndsY.min())/2);
+
+ if ( !Geom::are_near(start,end) ) {
+ Geom::Path path;
+ path.start( start );
+ path.appendNew<Geom::LineSegment>( end );
+ strokepath.param_set_and_write_new_value( path.toPwSb() );
+ } else {
+ // bounding box is too small to make decent path. set to default default. :-)
+ strokepath.param_set_and_write_default();
+ }
+}
+
+void
+LPECurveStitch::transform_multiply(Geom::Matrix const& postmul, bool set)
+{
+ // only take translations into account
+ if (postmul.isTranslation()) {
+ strokepath.param_transform_multiply(postmul, set);
+ } else if (!scale_y_rel.get_value()) {
+ // this basically means that for this transformation, the result should be the same as normal scaling the result path
+ // don't know how to do this yet.
+// Geom::Matrix new_postmul;
+ //new_postmul.setIdentity();
+// new_postmul.setTranslation(postmul.translation());
+// Effect::transform_multiply(new_postmul, set);
+ }
+}
+
+} //namespace LivePathEffect
+} /* namespace Inkscape */
+
+/*
+ Local Variables:
+ mode:c++
+ c-file-style:"stroustrup"
+ c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+ indent-tabs-mode:nil
+ fill-column:99
+ End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :