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#define INKSCAPE_LPE_VONKOCH_CPP
/*
* 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 "svg/svg.h"
#include "ui/widget/scalar.h"
#include "nodepath.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;
namespace Inkscape {
namespace LivePathEffect {
VonKochPathParam::~VonKochPathParam()
{
}
void
VonKochPathParam::param_setup_nodepath(Inkscape::NodePath::Path *np)
{
PathParam::param_setup_nodepath(np);
sp_nodepath_make_straight_path(np);
}
static const Util::EnumData<VonKochRefType> VonKochRefTypeData[VKREF_END] = {
{VKREF_BBOX, N_("Bounding box"), "bbox"},
{VKREF_SEG, N_("Last gen. segment"), "lastseg"},
};
static const Util::EnumDataConverter<VonKochRefType> VonKochRefTypeConverter(VonKochRefTypeData, VKREF_END);
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, true),
reftype(_("Reference"), _("Generating path segments define transforms in reference to bbox or last segment"), "reftype", VonKochRefTypeConverter, &wr, this, VKREF_BBOX),
maxComplexity(_("Max complexity"), _("Disable effect if the output is too complex"), "maxComplexity", &wr, this, 1000)
{
registerParameter( dynamic_cast<Parameter *>(&generator) );
registerParameter( dynamic_cast<Parameter *>(&nbgenerations) );
registerParameter( dynamic_cast<Parameter *>(&drawall) );
registerParameter( dynamic_cast<Parameter *>(&reftype) );
registerParameter( dynamic_cast<Parameter *>(&maxComplexity) );
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> const & path_in)
{
using namespace Geom;
std::vector<Geom::Path> generating_path = path_from_piecewise(generator.get_pwd2(),.01);//TODO what should that tolerance be?
//Collect transform matrices.
//FIXME: fusing/cutting nodes mix up component order in the path. This is why the last segment is used.
Matrix m0;
VonKochRefType type = reftype.get_value();
if (type==VKREF_BBOX){
Rect bbox = path_in[0].boundsExact();
for(unsigned i=1; i < path_in.size(); i++){
bbox.unionWith(path_in[i].boundsExact());
}
m0 = Matrix(bbox[X].extent(),0,0,bbox[X].extent(), bbox.min()[X], (bbox.min()[Y]+bbox.max()[Y])/2);
}else{
if (generating_path.size()==0) return path_in;
Point p = generating_path.back().back().pointAt(0);
Point u = generating_path.back().back().pointAt(0.999)-p;
m0 = Matrix(u[X], u[Y],-u[Y], u[X], p[X], p[Y]);
}
m0 = m0.inverse();
std::vector<Matrix> transforms;
for (unsigned i=0; i<generating_path.size(); i++){
unsigned end = generating_path[i].size();
if(type==VKREF_SEG && i==generating_path.size()-1) end-=1;
for (unsigned j=0; j<end; j++){
Point p = generating_path[i].pointAt(j);
Point 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]);
m = m0*m;
transforms.push_back(m);
}
}
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)){
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++){
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() && 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;
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() );
}
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 * 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));
paths.push_back(path);
//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)
{
// TODO: implement correct transformation instead of this default behavior
Effect::transform_multiply(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 :
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