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index 8a532663886c7478ec659cc6b497220f51b699ee..f52ee9f696f68be524ef5527fdf67fd1b2942e6f 100644 (file)
#define INKSCAPE_LPE_VONKOCH_CPP
/*
- * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
+ * Copyright (C) JF Barraud 2007 <jf.barraud@gmail.com>
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
+#include <cstdio>
#include "live_effects/lpe-vonkoch.h"
-#include "sp-shape.h"
-#include "sp-item.h"
-#include "sp-path.h"
-#include "display/curve.h"
-#include <libnr/n-art-bpath.h>
-#include <libnr/nr-matrix-fns.h>
-#include "live_effects/n-art-bpath-2geom.h"
-#include "svg/svg.h"
-#include "ui/widget/scalar.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/piecewise.h>
-
-#include <algorithm>
-using std::vector;
-
+#include <2geom/transforms.h>
+//using std::vector;
namespace Inkscape {
namespace LivePathEffect {
+void
+VonKochPathParam::param_setup_nodepath(Inkscape::NodePath::Path *np)
+{
+ PathParam::param_setup_nodepath(np);
+ //sp_nodepath_make_straight_path(np);
+}
+
+//FIXME: a path is used here instead of 2 points to work around path/point param incompatibility bug.
+void
+VonKochRefPathParam::param_setup_nodepath(Inkscape::NodePath::Path *np)
+{
+ PathParam::param_setup_nodepath(np);
+ //sp_nodepath_make_straight_path(np);
+}
+bool
+VonKochRefPathParam::param_readSVGValue(const gchar * strvalue)
+{
+ Geom::PathVector old = _pathvector;
+ bool res = PathParam::param_readSVGValue(strvalue);
+ if (res && _pathvector.size()==1 && _pathvector.front().size()==1){
+ return true;
+ }else{
+ _pathvector = old;
+ return false;
+ }
+}
+
LPEVonKoch::LPEVonKoch(LivePathEffectObject *lpeobject) :
Effect(lpeobject),
- nbgenerations(_("Nb of generations"), _("Depth of the recursion --- keep low!!"), "nbgenerations", &wr, this, 1),
- generator(_("Generating path"), _("Path whos segments define the fractal"), "generator", &wr, this, "M0,0 L3,0 M0,1 L1,1 M 2,1 L3,1"),
- drawall(_("Draw all generations"), _("If unchecked, draw only the last generation"), "drawall", &wr, this, false),
- vertical_pattern(_("Original path is vertical"), _("Rotates the original 90 degrees, before generating the fractal"), "vertical", &wr, this, false)
+ nbgenerations(_("Nb of generations:"), _("Depth of the recursion --- keep low!!"), "nbgenerations", &wr, this, 1),
+ generator(_("Generating path:"), _("Path whose segments define the iterated transforms"), "generator", &wr, this, "M0,0 L30,0 M0,10 L10,10 M 20,10 L30,10"),
+ similar_only(_("Use uniform transforms only"), _("2 consecutive segments are used to reverse/preserve orientation only (otherwise, they define a general transform)."), "similar_only", &wr, this, false),
+ drawall(_("Draw all generations"), _("If unchecked, draw only the last generation"), "drawall", &wr, this, true),
+ //,draw_boxes(_("Display boxes"), _("Display boxes instead of paths only"), "draw_boxes", &wr, this, true)
+ ref_path(_("Reference segment:"), _("The reference segment. Defaults to the horizontal midline of the bbox."), "ref_path", &wr, this, "M0,0 L10,0"),
+ //refA(_("Ref Start"), _("Left side middle of the reference box"), "refA", &wr, this),
+ //refB(_("Ref End"), _("Right side middle of the reference box"), "refB", &wr, this),
+ //FIXME: a path is used here instead of 2 points to work around path/point param incompatibility bug.
+ maxComplexity(_("Max complexity:"), _("Disable effect if the output is too complex"), "maxComplexity", &wr, this, 1000)
{
+ //FIXME: a path is used here instead of 2 points to work around path/point param incompatibility bug.
+ registerParameter( dynamic_cast<Parameter *>(&ref_path) );
+ //registerParameter( dynamic_cast<Parameter *>(&refA) );
+ //registerParameter( dynamic_cast<Parameter *>(&refB) );
registerParameter( dynamic_cast<Parameter *>(&generator) );
+ registerParameter( dynamic_cast<Parameter *>(&similar_only) );
registerParameter( dynamic_cast<Parameter *>(&nbgenerations) );
registerParameter( dynamic_cast<Parameter *>(&drawall) );
- registerParameter( dynamic_cast<Parameter *>(&vertical_pattern) );
+ registerParameter( dynamic_cast<Parameter *>(&maxComplexity) );
+ //registerParameter( dynamic_cast<Parameter *>(&draw_boxes) );
nbgenerations.param_make_integer();
nbgenerations.param_set_range(0, NR_HUGE);
+ maxComplexity.param_make_integer();
+ maxComplexity.param_set_range(0, NR_HUGE);
}
LPEVonKoch::~LPEVonKoch()
}
-
std::vector<Geom::Path>
-LPEVonKoch::doEffect_path (std::vector<Geom::Path> & path_in)
+LPEVonKoch::doEffect_path (std::vector<Geom::Path> const & path_in)
{
using namespace Geom;
- std::vector<Geom::Path> generating_path = path_from_piecewise(generator,.01);//TODO what should that tolerance be?
- Point p = generating_path[0].pointAt(0.001);
- Point u = generating_path[0].pointAt(0.999)-generating_path[0].pointAt(0.001);
- Matrix m0 = Matrix(u[X], u[Y],-u[Y], u[X], p[X], p[Y]);
+
+ std::vector<Geom::Path> generating_path = generator.get_pathvector();
+
+ if (generating_path.size()==0) {
+ return path_in;
+ }
+
+ //Collect transform matrices.
+ Matrix m0;
+ Geom::Path refpath = ref_path.get_pathvector().front();
+ Point A = refpath.pointAt(0);
+ Point B = refpath.pointAt(refpath.size());
+ Point u = B-A;
+ m0 = Matrix(u[X], u[Y],-u[Y], u[X], A[X], A[Y]);
+
+ //FIXME: a path is used as ref instead of 2 points to work around path/point param incompatibility bug.
+ //Point u = refB-refA;
+ //m0 = Matrix(u[X], u[Y],-u[Y], u[X], refA[X], refA[Y]);
m0 = m0.inverse();
std::vector<Matrix> transforms;
for (unsigned i=0; i<generating_path.size(); i++){
- for (unsigned j = (i==0)?1:0; j<generating_path[i].size(); j++){
- p = generating_path[i].pointAt(j);
- u = generating_path[i].pointAt(j+0.999)-generating_path[i].pointAt(j+0.001);
- Matrix m = Matrix(u[X], u[Y],-u[Y], u[X], p[X], p[Y]);
+ Matrix m;
+ if(generating_path[i].size()==1){
+ Point p = generating_path[i].pointAt(0);
+ Point u = generating_path[i].pointAt(1)-p;
+ m = Matrix(u[X], u[Y],-u[Y], u[X], p[X], p[Y]);
+ m = m0*m;
+ transforms.push_back(m);
+ }else if(generating_path[i].size()>=2){
+ Point p = generating_path[i].pointAt(1);
+ Point u = generating_path[i].pointAt(2)-p;
+ Point v = p-generating_path[i].pointAt(0);
+ if (similar_only.get_value()){
+ int sign = (u[X]*v[Y]-u[Y]*v[X]>=0?1:-1);
+ v[X] = -u[Y]*sign;
+ v[Y] = u[X]*sign;
+ }
+ m = Matrix(u[X], u[Y],v[X], v[Y], p[X], p[Y]);
m = m0*m;
transforms.push_back(m);
}
}
-/*
- assert(generating_path.size()>0);
- std::vector<Matrix> transforms;
- transforms.push_back(Matrix(.5, 0., 0., .5, 0.,50.));
- transforms.push_back(Matrix(.5, 0., 0., .5, 100., 0.));
-*/
-
+ if (transforms.size()==0){
+ return path_in;
+ }
+
+ //Do nothing if the output is too complex...
+ int path_in_complexity = 0;
+ for (unsigned k = 0; k < path_in.size(); k++){
+ path_in_complexity+=path_in[k].size();
+ }
+ double complexity = pow(transforms.size(),nbgenerations)*path_in_complexity;
+ if (drawall.get_value()){
+ int k = transforms.size();
+ if(k>1){
+ complexity = (pow(k,nbgenerations+1)-1)/(k-1)*path_in_complexity;
+ }else{
+ complexity = nbgenerations*k*path_in_complexity;
+ }
+ }else{
+ complexity = pow(transforms.size(),nbgenerations)*path_in_complexity;
+ }
+ if (complexity > double(maxComplexity)){
+ g_warning("VonKoch lpe's output too complex. Effect bypassed.");
+ return path_in;
+ }
+
+ //Generate path:
std::vector<Geom::Path> pathi = path_in;
std::vector<Geom::Path> path_out = path_in;
-
+
for (unsigned i = 0; i<nbgenerations; i++){
- path_out = (drawall.get_value())? path_in : std::vector<Geom::Path>();
+ if (drawall.get_value()){
+ path_out = path_in;
+ complexity = path_in_complexity;
+ }else{
+ path_out = std::vector<Geom::Path>();
+ complexity = 0;
+ }
for (unsigned j = 0; j<transforms.size(); j++){
- for (unsigned k = 0; k<pathi.size(); k++){
+ for (unsigned k = 0; k<pathi.size() && complexity < maxComplexity; k++){
path_out.push_back(pathi[k]*transforms[j]);
+ complexity+=pathi[k].size();
}
}
pathi = path_out;
return path_out;
}
-void
-LPEVonKoch::resetDefaults(SPItem * item)
-{
- if (!SP_IS_PATH(item)) return;
+//Usefull??
+//void
+//LPEVonKoch::addCanvasIndicators(SPLPEItem */*lpeitem*/, std::vector<Geom::PathVector> &hp_vec)
+/*{
using namespace Geom;
-
- // set the bend 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() );
+ if (draw_boxes.get_value()){
+ double ratio = .5;
+ if (similar_only.get_value()) ratio = boundingbox_Y.extent()/boundingbox_X.extent()/2;
+
+ Point BB1,BB2,BB3,BB4,v;
+
+ //Draw the reference box (ref_path is supposed to consist in one line segment)
+ //FIXME: a path is used as ref instead of 2 points to work around path/point param incompatibility bug.
+ Geom::Path refpath = ref_path.get_pathvector().front();
+ if (refpath.size()==1){
+ BB1 = BB4 = refpath.front().pointAt(0);
+ BB2 = BB3 = refpath.front().pointAt(1);
+ v = rot90(BB2 - BB1)*ratio;
+ BB1 -= v;
+ BB2 -= v;
+ BB3 += v;
+ BB4 += v;
+ Geom::Path refbox(BB1);
+ refbox.appendNew<LineSegment>(BB2);
+ refbox.appendNew<LineSegment>(BB3);
+ refbox.appendNew<LineSegment>(BB4);
+ refbox.close();
+ PathVector refbox_as_vect;
+ refbox_as_vect.push_back(refbox);
+ hp_vec.push_back(refbox_as_vect);
+ }
+ //Draw the transformed boxes
+ std::vector<Geom::Path> generating_path = generator.get_pathvector();
+ for (unsigned i=0;i<generating_path.size(); i++){
+ if (generating_path[i].size()==0){
+ //Ooops! this should not happen.
+ }else if (generating_path[i].size()==1){
+ BB1 = BB4 = generating_path[i].pointAt(0);
+ BB2 = BB3 = generating_path[i].pointAt(1);
+ v = rot90(BB2 - BB1)*ratio;
+ }else{//Only tak the first 2 segments into account.
+ BB1 = BB4 = generating_path[i].pointAt(1);
+ BB2 = BB3 = generating_path[i].pointAt(2);
+ if(similar_only.get_value()){
+ v = rot90(BB2 - BB1)*ratio;
+ }else{
+ v = (generating_path[i].pointAt(0) - BB1)*ratio;
+ }
+ }
+ BB1 -= v;
+ BB2 -= v;
+ BB3 += v;
+ BB4 += v;
+ Geom::Path path(BB1);
+ path.appendNew<LineSegment>(BB2);
+ path.appendNew<LineSegment>(BB3);
+ path.appendNew<LineSegment>(BB4);
+ path.close();
+ PathVector pathv;
+ pathv.push_back(path);
+ hp_vec.push_back(pathv);
+ }
}
-
- 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);
-
- std::vector<Geom::Path> paths;
- Geom::Path path;
- path = Geom::Path();
- path.start( start );
- path.appendNew<Geom::LineSegment>( end );
- paths.push_back(path);
- paths.push_back(path * Matrix(1./3,0,0,1./3,start[X]*2./3,start[Y]*2./3 + bndsY.extent()/2));
- paths.push_back(path * Matrix(1./3,0,0,1./3, end[X]*2./3, end[Y]*2./3 + bndsY.extent()/2));
-
- //generator.param_set_and_write_new_value( path.toPwSb() );
- generator.param_set_and_write_new_value( paths_to_pw(paths) );
-
-
-// Piecewise<D2<SBasis> > default_gen;
-// default_gen.concat(Piecewise<D2<SBasis> >(D2<SBasis>(Linear(bndsX.min(),bndsX.max()),Linear((bndsY.min()+bndsY.max())/2))));
-// default_gen.concat(Piecewise<D2<SBasis> >(D2<SBasis>(Linear(bndsX.max(),bndsX.max()+bndsX.extent()/2),Linear((bndsY.min()+bndsY.max())/2))));
-// generator.param_set_and_write_new_value( default_gen );
}
+*/
void
-LPEVonKoch::transform_multiply(Geom::Matrix const& postmul, bool set)
+LPEVonKoch::doBeforeEffect (SPLPEItem *lpeitem)
{
- // TODO: implement correct transformation instead of this default behavior
- Effect::transform_multiply(postmul, set);
+ using namespace Geom;
+ original_bbox(lpeitem);
+
+ std::vector<Geom::Path> paths = ref_path.get_pathvector();
+ Geom::Point A,B;
+ if (paths.size()==0||paths.front().size()==0){
+ //FIXME: a path is used as ref instead of 2 points to work around path/point param incompatibility bug.
+ //refA.param_setValue( Geom::Point(boundingbox_X.min(), boundingbox_Y.middle()) );
+ //refB.param_setValue( Geom::Point(boundingbox_X.max(), boundingbox_Y.middle()) );
+ A = Point(boundingbox_X.min(), boundingbox_Y.middle());
+ B = Point(boundingbox_X.max(), boundingbox_Y.middle());
+ }else{
+ A = paths.front().pointAt(0);
+ B = paths.front().pointAt(paths.front().size());
+ }
+ if (paths.size()!=1||paths.front().size()!=1){
+ Geom::Path tmp_path(A);
+ tmp_path.appendNew<LineSegment>(B);
+ std::vector<Geom::Path> tmp_pathv;
+ tmp_pathv.push_back(tmp_path);
+ ref_path.set_new_value(tmp_pathv,true);
+ }
}
+void
+LPEVonKoch::resetDefaults(SPItem * item)
+{
+ Effect::resetDefaults(item);
+
+ using namespace Geom;
+ original_bbox(SP_LPE_ITEM(item));
+
+ Point A,B;
+ A[Geom::X] = boundingbox_X.min();
+ A[Geom::Y] = boundingbox_Y.middle();
+ B[Geom::X] = boundingbox_X.max();
+ B[Geom::Y] = boundingbox_Y.middle();
+
+ std::vector<Geom::Path> paths,refpaths;
+ Geom::Path path = Geom::Path(A);
+ path.appendNew<Geom::LineSegment>(B);
+
+ refpaths.push_back(path);
+ ref_path.set_new_value(refpaths, true);
+
+ paths.push_back(path * Matrix(1./3,0,0,1./3, A[X]*2./3, A[Y]*2./3 + boundingbox_Y.extent()/2));
+ paths.push_back(path * Matrix(1./3,0,0,1./3, B[X]*2./3, B[Y]*2./3 + boundingbox_Y.extent()/2));
+ generator.set_new_value(paths, true);
+
+ //FIXME: a path is used as ref instead of 2 points to work around path/point param incompatibility bug.
+ //refA[Geom::X] = boundingbox_X.min();
+ //refA[Geom::Y] = boundingbox_Y.middle();
+ //refB[Geom::X] = boundingbox_X.max();
+ //refB[Geom::Y] = boundingbox_Y.middle();
+ //std::vector<Geom::Path> paths;
+ //Geom::Path path = Geom::Path( (Point) refA);
+ //path.appendNew<Geom::LineSegment>( (Point) refB );
+ //paths.push_back(path * Matrix(1./3,0,0,1./3, refA[X]*2./3, refA[Y]*2./3 + boundingbox_Y.extent()/2));
+ //paths.push_back(path * Matrix(1./3,0,0,1./3, refB[X]*2./3, refB[Y]*2./3 + boundingbox_Y.extent()/2));
+ //paths.push_back(path);
+ //generator.set_new_value(paths, true);
+}
+
} // namespace LivePathEffect
} /* namespace Inkscape */