/* === S Y N F I G ========================================================= */
/*! \file outline.cpp
** \brief Implementation of the "Outline" layer
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2007, 2008 Chris Moore
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of
** the License, or (at your option) any later version.
**
** This package is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
** \endlegal
*/
/* ========================================================================= */
//! \note This whole file should be rewritten at some point (darco)
/* === H E A D E R S ======================================================= */
#ifdef USING_PCH
# include "pch.h"
#else
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "outline.h"
#include <synfig/string.h>
#include <synfig/time.h>
#include <synfig/context.h>
#include <synfig/paramdesc.h>
#include <synfig/renddesc.h>
#include <synfig/surface.h>
#include <synfig/value.h>
#include <synfig/valuenode.h>
#include <ETL/calculus>
#include <ETL/bezier>
#include <ETL/hermite>
#include <vector>
#include <synfig/valuenode_bline.h>
#endif
using namespace etl;
/* === M A C R O S ========================================================= */
#define SAMPLES 50
#define ROUND_END_FACTOR (4)
#define CUSP_THRESHOLD (0.40)
#define SPIKE_AMOUNT (4)
#define NO_LOOP_COOKIE synfig::Vector(84951305,7836658)
#define EPSILON (0.000000001)
#define CUSP_TANGENT_ADJUST (0.025)
/* === G L O B A L S ======================================================= */
SYNFIG_LAYER_INIT(Outline);
SYNFIG_LAYER_SET_NAME(Outline,"outline");
SYNFIG_LAYER_SET_LOCAL_NAME(Outline,N_("Outline"));
SYNFIG_LAYER_SET_CATEGORY(Outline,N_("Geometry"));
SYNFIG_LAYER_SET_VERSION(Outline,"0.2");
SYNFIG_LAYER_SET_CVS_ID(Outline,"$Id$");
/* === P R O C E D U R E S ================================================= */
// This function was adapted from what was
// described on http://www.whisqu.se/per/docs/math28.htm
Point line_intersection(
const Point& p1,
const Vector& t1,
const Point& p2,
const Vector& t2
)
{
const float& x0(p1[0]);
const float& y0(p1[1]);
const float x1(p1[0]+t1[0]);
const float y1(p1[1]+t1[1]);
const float& x2(p2[0]);
const float& y2(p2[1]);
const float x3(p2[0]+t2[0]);
const float y3(p2[1]+t2[1]);
const float near_infinity((float)1e+10);
float m1,m2; // the slopes of each line
// compute slopes, note the kluge for infinity, however, this will
// be close enough
if ((x1-x0)!=0)
m1 = (y1-y0)/(x1-x0);
else
m1 = near_infinity;
if ((x3-x2)!=0)
m2 = (y3-y2)/(x3-x2);
else
m2 = near_infinity;
// compute constants
const float& a1(m1);
const float& a2(m2);
const float b1(-1.0f);
const float b2(-1.0f);
const float c1(y0-m1*x0);
const float c2(y2-m2*x2);
// compute the inverse of the determinate
const float det_inv(1.0f/(a1*b2 - a2*b1));
// use Kramers rule to compute the intersection
return Point(
((b1*c2 - b2*c1)*det_inv),
((a2*c1 - a1*c2)*det_inv)
);
} // end Intersect_Lines
/* === M E T H O D S ======================================================= */
Outline::Outline()
{
old_version=false;
round_tip[0]=true;
round_tip[1]=true;
sharp_cusps=true;
width=1.0f;
loopyness=1.0f;
expand=0;
homogeneous_width=true;
clear();
vector<BLinePoint> bline_point_list;
bline_point_list.push_back(BLinePoint());
bline_point_list.push_back(BLinePoint());
bline_point_list.push_back(BLinePoint());
bline_point_list[0].set_vertex(Point(0,1));
bline_point_list[1].set_vertex(Point(0,-1));
bline_point_list[2].set_vertex(Point(1,0));
bline_point_list[0].set_tangent(bline_point_list[1].get_vertex()-bline_point_list[2].get_vertex()*0.5f);
bline_point_list[1].set_tangent(bline_point_list[2].get_vertex()-bline_point_list[0].get_vertex()*0.5f);
bline_point_list[2].set_tangent(bline_point_list[0].get_vertex()-bline_point_list[1].get_vertex()*0.5f);
bline_point_list[0].set_width(1.0f);
bline_point_list[1].set_width(1.0f);
bline_point_list[2].set_width(1.0f);
bline=bline_point_list;
needs_sync=true;
Layer::Vocab voc(get_param_vocab());
Layer::fill_static(voc);
}
/*! The Sync() function takes the values
** and creates a polygon to be rendered
** with the polygon layer.
*/
void
Outline::sync()
{
clear();
if (!bline.get_list().size())
{
synfig::warning(string("Outline::sync():")+N_("No vertices in outline " + string("\"") + get_description() + string("\"")));
return;
}
try {
#if 1
const bool loop(bline.get_loop());
ValueNode_BLine::Handle bline_valuenode;
if (bline.get_contained_type() == ValueBase::TYPE_SEGMENT)
{
bline_valuenode = ValueNode_BLine::create(bline);
bline = (*bline_valuenode)(0);
}
const vector<synfig::BLinePoint> bline_(bline.get_list().begin(),bline.get_list().end());
#define bline bline_
vector<BLinePoint>::const_iterator
iter,
next(bline.begin());
const vector<BLinePoint>::const_iterator
end(bline.end());
vector<Point>
side_a,
side_b;
if(loop)
iter=--bline.end();
else
iter=next++;
// iter next
// ---- ----
// looped nth 1st
// !looped 1st 2nd
Vector first_tangent=bline.front().get_tangent2();
Vector last_tangent=iter->get_tangent1();
// if we are looped and drawing sharp cusps, we'll need a value for the incoming tangent
if (loop && sharp_cusps && last_tangent.is_equal_to(Vector::zero()))
{
hermite<Vector> curve((iter-1)->get_vertex(), iter->get_vertex(), (iter-1)->get_tangent2(), iter->get_tangent1());
const derivative< hermite<Vector> > deriv(curve);
last_tangent=deriv(1.0-CUSP_TANGENT_ADJUST);
}
// `first' is for making the cusps; don't do that for the first point if we're not looped
for(bool first=!loop; next!=end; iter=next++)
{
Vector prev_t(iter->get_tangent1());
Vector iter_t(iter->get_tangent2());
Vector next_t(next->get_tangent1());
bool split_flag(iter->get_split_tangent_flag());
// if iter.t2 == 0 and next.t1 == 0, this is a straight line
if(iter_t.is_equal_to(Vector::zero()) && next_t.is_equal_to(Vector::zero()))
{
iter_t=next_t=next->get_vertex()-iter->get_vertex();
// split_flag=true;
// if the two points are on top of each other, ignore this segment
// leave `first' true if was before
if (iter_t.is_equal_to(Vector::zero()))
continue;
}
// Setup the curve
hermite<Vector> curve(
iter->get_vertex(),
next->get_vertex(),
iter_t,
next_t
);
const float
iter_w((iter->get_width()*width)*0.5f+expand),
next_w((next->get_width()*width)*0.5f+expand);
const derivative< hermite<Vector> > deriv(curve);
if (first)
first_tangent = deriv(CUSP_TANGENT_ADJUST);
// Make cusps as necessary
if(!first && sharp_cusps && split_flag && (!prev_t.is_equal_to(iter_t) || iter_t.is_equal_to(Vector::zero())) && !last_tangent.is_equal_to(Vector::zero()))
{
Vector curr_tangent(deriv(CUSP_TANGENT_ADJUST));
const Vector t1(last_tangent.perp().norm());
const Vector t2(curr_tangent.perp().norm());
Real cross(t1*t2.perp());
Real perp((t1-t2).mag());
if(cross>CUSP_THRESHOLD)
{
const Point p1(iter->get_vertex()+t1*iter_w);
const Point p2(iter->get_vertex()+t2*iter_w);
side_a.push_back(line_intersection(p1,last_tangent,p2,curr_tangent));
}
else if(cross<-CUSP_THRESHOLD)
{
const Point p1(iter->get_vertex()-t1*iter_w);
const Point p2(iter->get_vertex()-t2*iter_w);
side_b.push_back(line_intersection(p1,last_tangent,p2,curr_tangent));
}
else if(cross>0 && perp>1)
{
float amount(max(0.0f,(float)(cross/CUSP_THRESHOLD))*(SPIKE_AMOUNT-1)+1);
side_a.push_back(iter->get_vertex()+(t1+t2).norm()*iter_w*amount);
}
else if(cross<0 && perp>1)
{
float amount(max(0.0f,(float)(-cross/CUSP_THRESHOLD))*(SPIKE_AMOUNT-1)+1);
side_b.push_back(iter->get_vertex()-(t1+t2).norm()*iter_w*amount);
}
}
// Make the outline
if(homogeneous_width)
{
const float length(curve.length());
float dist(0);
Point lastpoint;
for(float n=0.0f;n<0.999999f;n+=1.0f/SAMPLES)
{
const Vector d(deriv(n>CUSP_TANGENT_ADJUST?n:CUSP_TANGENT_ADJUST).perp().norm());
const Vector p(curve(n));
if(n)
dist+=(p-lastpoint).mag();
const float w(((next_w-iter_w)*(dist/length)+iter_w));
side_a.push_back(p+d*w);
side_b.push_back(p-d*w);
lastpoint=p;
}
}
else
for(float n=0.0f;n<0.999999f;n+=1.0f/SAMPLES)
{
const Vector d(deriv(n>CUSP_TANGENT_ADJUST?n:CUSP_TANGENT_ADJUST).perp().norm());
const Vector p(curve(n));
const float w(((next_w-iter_w)*n+iter_w));
side_a.push_back(p+d*w);
side_b.push_back(p-d*w);
}
last_tangent=deriv(1.0-CUSP_TANGENT_ADJUST);
side_a.push_back(curve(1.0)+last_tangent.perp().norm()*next_w);
side_b.push_back(curve(1.0)-last_tangent.perp().norm()*next_w);
first=false;
}
if(loop)
{
reverse(side_b.begin(),side_b.end());
add_polygon(side_a);
add_polygon(side_b);
return;
}
// Insert code for adding end tip
if(round_tip[1] && !loop && side_a.size())
{
// remove the last point
side_a.pop_back();
const Point vertex(bline.back().get_vertex());
const Vector tangent(last_tangent.norm());
const float w((bline.back().get_width()*width)*0.5f+expand);
hermite<Vector> curve(
vertex+tangent.perp()*w,
vertex-tangent.perp()*w,
tangent*w*ROUND_END_FACTOR,
-tangent*w*ROUND_END_FACTOR
);
for(float n=0.0f;n<0.999999f;n+=1.0f/SAMPLES)
side_a.push_back(curve(n));
}
for(;!side_b.empty();side_b.pop_back())
side_a.push_back(side_b.back());
// Insert code for adding begin tip
if(round_tip[0] && !loop && side_a.size())
{
// remove the last point
side_a.pop_back();
const Point vertex(bline.front().get_vertex());
const Vector tangent(first_tangent.norm());
const float w((bline.front().get_width()*width)*0.5f+expand);
hermite<Vector> curve(
vertex-tangent.perp()*w,
vertex+tangent.perp()*w,
-tangent*w*ROUND_END_FACTOR,
tangent*w*ROUND_END_FACTOR
);
for(float n=0.0f;n<0.999999f;n+=1.0f/SAMPLES)
side_a.push_back(curve(n));
}
add_polygon(side_a);
#else /* 1 */
bool loop_;
if(bline.get_contained_type()==ValueBase::TYPE_BLINEPOINT)
{
ValueBase value(bline);
if(loopyness<0.5f)
{
value.set_loop(false);
loop_=false;
}
else
loop_=value.get_loop();
segment_list=convert_bline_to_segment_list(value);
width_list=convert_bline_to_width_list(value);
}
else
{
clear();
return;
}
if(segment_list.empty())
{
synfig::warning("Outline: segment_list is empty, layer disabled");
clear();
return;
}
// Repair the width list if we need to
{
Real default_width;
if(width_list.empty())
default_width=0.01;
else
default_width=width_list.back();
while(width_list.size()<segment_list.size()+1)
width_list.push_back(default_width);
while(width_list.size()>segment_list.size()+1)
width_list.pop_back();
}
// Repair the zero tangents (if any)
{
vector<Segment>::iterator iter;
for(iter=segment_list.begin();iter!=segment_list.end();++iter)
{
if(iter->t1.mag_squared()<=EPSILON && iter->t2.mag_squared()<=EPSILON)
iter->t1=iter->t2=iter->p2-iter->p1;
}
}
vector<Real>::iterator iter;
vector<Real> scaled_width_list;
for(iter=width_list.begin();iter!=width_list.end();++iter)
{
scaled_width_list.push_back((*iter*width+expand)*0.5f);
}
Vector::value_type n;
etl::hermite<Vector> curve;
vector<Point> vector_list;
Vector last_tangent(segment_list.back().t2);
clear();
if(!loop_)
last_tangent=NO_LOOP_COOKIE;
{
vector<Segment>::iterator iter;
vector<Real>::iterator witer;
for(
iter=segment_list.begin(),
witer=scaled_width_list.begin();
iter!=segment_list.end();
++iter,++witer)
{
if(iter->t1.mag_squared()<=EPSILON && iter->t2.mag_squared()<=EPSILON)
{
vector_list.push_back(iter->p1-(iter->p2-iter->p1).perp().norm()*witer[0]);
vector_list.push_back((iter->p2-iter->p1)*0.05+iter->p1-(iter->p2-iter->p1).perp().norm()*((witer[1]-witer[0])*0.05+witer[0]));
vector_list.push_back((iter->p2-iter->p1)*0.95+iter->p1-(iter->p2-iter->p1).perp().norm()*((witer[1]-witer[0])*0.95+witer[0]));
vector_list.push_back(iter->p2-(iter->p2-iter->p1).perp().norm()*witer[1]);
}
else
{
curve.p1()=iter->p1;
curve.t1()=iter->t1;
curve.p2()=iter->p2;
curve.t2()=iter->t2;
curve.sync();
etl::derivative<etl::hermite<Vector> > deriv(curve);
// without this if statement, the broken tangents would
// have boxed edges
if(sharp_cusps && last_tangent!=NO_LOOP_COOKIE && !last_tangent.is_equal_to(iter->t1))
{
//Vector curr_tangent(iter->t1);
Vector curr_tangent(deriv(CUSP_TANGENT_ADJUST));
const Vector t1(last_tangent.perp().norm());
const Vector t2(curr_tangent.perp().norm());
Point p1(iter->p1+t1*witer[0]);
Point p2(iter->p1+t2*witer[0]);
Real cross(t1*t2.perp());
if(cross>CUSP_THRESHOLD)
vector_list.push_back(line_intersection(p1,last_tangent,p2,curr_tangent));
else if(cross>0)
{
float amount(max(0.0f,(float)(cross/CUSP_THRESHOLD))*(SPIKE_AMOUNT-1)+1);
// Push back something to make it look vaguely round;
//vector_list.push_back(iter->p1+(t1*1.25+t2).norm()*witer[0]*amount);
vector_list.push_back(iter->p1+(t1+t2).norm()*witer[0]*amount);
//vector_list.push_back(iter->p1+(t1+t2*1.25).norm()*witer[0]*amount);
}
}
//last_tangent=iter->t2;
last_tangent=deriv(1.0f-CUSP_TANGENT_ADJUST);
for(n=0.0f;n<1.0f;n+=1.0f/SAMPLES)
vector_list.push_back(curve(n)+deriv(n>CUSP_TANGENT_ADJUST?n:CUSP_TANGENT_ADJUST).perp().norm()*((witer[1]-witer[0])*n+witer[0]) );
vector_list.push_back(curve(1.0)+deriv(1.0-CUSP_TANGENT_ADJUST).perp().norm()*witer[1]);
}
}
if(round_tip[1] && !loop_/* && (!sharp_cusps || segment_list.front().p1!=segment_list.back().p2)*/)
{
// remove the last point
vector_list.pop_back();
iter--;
curve.p1()=iter->p2+Vector(last_tangent[1],-last_tangent[0]).norm()*(*witer);
curve.p2()=iter->p2-(Vector(last_tangent[1],-last_tangent[0]).norm()*(*witer));
curve.t2()=-(curve.t1()=last_tangent/last_tangent.mag()*(*witer)*ROUND_END_FACTOR);
curve.sync();
for(n=0.0f;n<1.0f;n+=1.0f/SAMPLES)
vector_list.push_back(curve(n));
// remove the last point
vector_list.pop_back();
}
}
if(!loop_)
last_tangent=NO_LOOP_COOKIE;
else
{
add_polygon(vector_list);
vector_list.clear();
last_tangent=segment_list.front().t1;
}
//else
// last_tangent=segment_list.back().t2;
{
vector<Segment>::reverse_iterator iter;
vector<Real>::reverse_iterator witer;
for(
iter=segment_list.rbegin(),
witer=scaled_width_list.rbegin(),++witer;
!(iter==segment_list.rend());
++iter,++witer)
{
if(iter->t1.mag_squared()<=EPSILON && iter->t2.mag_squared()<=EPSILON)
{
vector_list.push_back(iter->p2+(iter->p2-iter->p1).perp().norm()*witer[0]);
vector_list.push_back((iter->p2-iter->p1)*0.95+iter->p1+(iter->p2-iter->p1).perp().norm()*((witer[-1]-witer[0])*0.95+witer[0]));
vector_list.push_back((iter->p2-iter->p1)*0.05+iter->p1+(iter->p2-iter->p1).perp().norm()*((witer[-1]-witer[0])*0.05+witer[0]));
vector_list.push_back(iter->p1+(iter->p2-iter->p1).perp().norm()*witer[-1]);
}
else
{
curve.p1()=iter->p1;
curve.t1()=iter->t1;
curve.p2()=iter->p2;
curve.t2()=iter->t2;
curve.sync();
etl::derivative<etl::hermite<Vector> > deriv(curve);
// without this if statement, the broken tangents would
// have boxed edges
if(sharp_cusps && last_tangent!=NO_LOOP_COOKIE && !last_tangent.is_equal_to(iter->t2))
{
//Vector curr_tangent(iter->t2);
Vector curr_tangent(deriv(1.0f-CUSP_TANGENT_ADJUST));
const Vector t1(last_tangent.perp().norm());
const Vector t2(curr_tangent.perp().norm());
Point p1(iter->p2-t1*witer[-1]);
Point p2(iter->p2-t2*witer[-1]);
Real cross(t1*t2.perp());
//if(last_tangent.perp().norm()*curr_tangent.norm()<-CUSP_THRESHOLD)
if(cross>CUSP_THRESHOLD)
vector_list.push_back(line_intersection(p1,last_tangent,p2,curr_tangent));
else if(cross>0)
{
float amount(max(0.0f,(float)(cross/CUSP_THRESHOLD))*(SPIKE_AMOUNT-1)+1);
// Push back something to make it look vaguely round;
//vector_list.push_back(iter->p2-(t1*1.25+t2).norm()*witer[-1]*amount);
vector_list.push_back(iter->p2-(t1+t2).norm()*witer[-1]*amount);
//vector_list.push_back(iter->p2-(t1+t2*1.25).norm()*witer[-1]*amount);
}
}
//last_tangent=iter->t1;
last_tangent=deriv(CUSP_TANGENT_ADJUST);
for(n=1.0f;n>CUSP_TANGENT_ADJUST;n-=1.0f/SAMPLES)
vector_list.push_back(curve(n)-deriv(1-n>CUSP_TANGENT_ADJUST?n:1-CUSP_TANGENT_ADJUST).perp().norm()*((witer[-1]-witer[0])*n+witer[0]) );
vector_list.push_back(curve(0.0f)-deriv(CUSP_TANGENT_ADJUST).perp().norm()*witer[0]);
}
}
if(round_tip[0] && !loop_/* && (!sharp_cusps || segment_list.front().p1!=segment_list.back().p2)*/)
{
// remove the last point
vector_list.pop_back();
iter--;
witer--;
curve.p1()=iter->p1+Vector(last_tangent[1],-last_tangent[0]).norm()*(*witer);
curve.p2()=iter->p1-(Vector(last_tangent[1],-last_tangent[0]).norm()*(*witer));
curve.t1()=-(curve.t2()=last_tangent/last_tangent.mag()*(*witer)*ROUND_END_FACTOR);
curve.sync();
for(n=1.0;n>0.0;n-=1.0/SAMPLES)
vector_list.push_back(curve(n));
// remove the last point
vector_list.pop_back();
}
}
//if(loop_)
// reverse(vector_list.begin(),vector_list.end());
#ifdef _DEBUG
{
vector<Point>::iterator iter;
for(iter=vector_list.begin();iter!=vector_list.end();++iter)
if(!iter->is_valid())
{
synfig::error("Outline::sync(): Bad point in vector_list!");
}
//synfig::info("BLEHH__________--- x:%f, y:%f",vector_list.front()[0],vector_list.front()[1]);
}
#endif /* _DEBUG */
add_polygon(vector_list);
#endif /* 1 */
} catch (...) { synfig::error("Outline::sync(): Exception thrown"); throw; }
}
#undef bline
bool
Outline::set_param(const String & param, const ValueBase &value)
{
if(param=="segment_list")
{
if(dynamic_param_list().count("segment_list"))
{
connect_dynamic_param("bline",dynamic_param_list().find("segment_list")->second);
disconnect_dynamic_param("segment_list");
synfig::warning("Outline::set_param(): Updated valuenode connection to use the new \"bline\" parameter.");
}
else
synfig::warning("Outline::set_param(): The parameter \"segment_list\" is deprecated. Use \"bline\" instead.");
}
if( (param=="segment_list" || param=="bline") && value.get_type()==ValueBase::TYPE_LIST)
{
//if(value.get_contained_type()!=ValueBase::TYPE_BLINEPOINT)
// return false;
bline=value;
return true;
}
/*
if( param=="seg" && value.get_type()==ValueBase::TYPE_SEGMENT)
{
if(!segment_list.empty())
segment_list.clear();
segment_list.push_back(value.get(Segment()));
loop_=false;
//sync();
return true;
}
if( param=="w[0]" && value.get_type()==ValueBase::TYPE_REAL)
{
if(width_list.size()<2)
{
width_list.push_back(value.get(Real()));
width_list.push_back(value.get(Real()));
}
else
{
width_list[0]=value.get(Real());
}
width=1;
//sync();
return true;
}
if( param=="w[1]" && value.get_type()==ValueBase::TYPE_REAL)
{
if(width_list.size()<2)
{
width_list.push_back(value.get(Real()));
width_list.push_back(value.get(Real()));
}
else
{
width_list[1]=value.get(Real());
}
width=1;
//sync();
return true;
}
if( param=="width_list" && value.same_type_as(width_list))
{
width_list=value;
//sync();
return true;
}
*/
IMPORT(round_tip[0]);
IMPORT(round_tip[1]);
IMPORT(sharp_cusps);
IMPORT_PLUS(width,if(old_version){width*=2.0;});
IMPORT(loopyness);
IMPORT(expand);
IMPORT(homogeneous_width);
if(param!="vector_list")
return Layer_Polygon::set_param(param,value);
return false;
}
void
Outline::set_time(Context context, Time time)const
{
const_cast<Outline*>(this)->sync();
context.set_time(time);
}
void
Outline::set_time(Context context, Time time, Vector pos)const
{
const_cast<Outline*>(this)->sync();
context.set_time(time,pos);
}
ValueBase
Outline::get_param(const String& param)const
{
EXPORT(bline);
EXPORT(expand);
//EXPORT(width_list);
//EXPORT(segment_list);
EXPORT(homogeneous_width);
EXPORT(round_tip[0]);
EXPORT(round_tip[1]);
EXPORT(sharp_cusps);
EXPORT(width);
EXPORT(loopyness);
EXPORT_NAME();
EXPORT_VERSION();
if(param!="vector_list")
return Layer_Polygon::get_param(param);
return ValueBase();
}
Layer::Vocab
Outline::get_param_vocab()const
{
Layer::Vocab ret(Layer_Polygon::get_param_vocab());
// Pop off the polygon parameter from the polygon vocab
ret.pop_back();
ret.push_back(ParamDesc("bline")
.set_local_name(_("Vertices"))
.set_origin("origin")
.set_hint("width")
.set_description(_("A list of BLine Points"))
);
/*
ret.push_back(ParamDesc("width_list")
.set_local_name(_("Point Widths"))
.set_origin("segment_list")
.hidden()
.not_critical()
);
*/
ret.push_back(ParamDesc("width")
.set_is_distance()
.set_local_name(_("Outline Width"))
.set_description(_("Global width of the outline"))
);
ret.push_back(ParamDesc("expand")
.set_is_distance()
.set_local_name(_("Expand"))
.set_description(_("Value to add to the global width"))
);
ret.push_back(ParamDesc("sharp_cusps")
.set_local_name(_("Sharp Cusps"))
.set_description(_("Determines cusp type"))
);
ret.push_back(ParamDesc("round_tip[0]")
.set_local_name(_("Rounded Begin"))
.set_description(_("Round off the tip"))
);
ret.push_back(ParamDesc("round_tip[1]")
.set_local_name(_("Rounded End"))
.set_description(_("Round off the tip"))
);
ret.push_back(ParamDesc("loopyness")
.set_local_name(_("Loopyness"))
);
ret.push_back(ParamDesc("homogeneous_width")
.set_local_name(_("Homogeneous"))
.set_description(_("When checked the width takes the length of the spline to interpolate"))
);
return ret;
}