#define INKSCAPE_LPE_VONKOCH_CPP

#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()

{

}

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),

similar_only(_("Use uniform scale/rotation only"), _("If off, 2segments component of generating path can be used to define a general rtansform. If on, they only affect the orientation preserving/reversing of the transform."), "similar_only", &wr, this, false),

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 *>(&similar_only) );

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 = Rect(boundingbox_X,boundingbox_Y);

m0 = Matrix(boundingbox_X.extent(),0,0,boundingbox_X.extent(), boundingbox_X.min(), boundingbox_Y.middle());

}else{

if (generating_path.size()==0) return path_in;

Point p = generating_path.back().back().pointAt(0);

Point u = generating_path.back().back().pointAt(1)-p;

m0 = Matrix(u[X], u[Y],-u[Y], u[X], p[X], p[Y]);

}

m0 = m0.inverse();

std::vector<Matrix> transforms;

unsigned end = generating_path.size();

if (type==VKREF_SEG) end-=1;

for (unsigned i=0; i<generating_path.size(); i++){

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){

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);

}

}

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;

}

LPEVonKoch::doBeforeEffect (SPLPEItem *lpeitem)

{

original_bbox(lpeitem);

}

LPEVonKoch::resetDefaults(SPItem * item)

{

using namespace Geom;

original_bbox(SP_LPE_ITEM(item));

Point start(boundingbox_X.min(), boundingbox_Y.middle());

Point end(boundingbox_X.max(), boundingbox_Y.middle());

std::vector<Geom::Path> paths;

Geom::Path path = Geom::Path(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 + boundingbox_Y.extent()/2));

paths.push_back(path * Matrix(1./3,0,0,1./3, end[X]*2./3, end[Y]*2./3 + boundingbox_Y.extent()/2));

paths.push_back(path);

generator.set_new_value(paths, true);

}

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 */