virtual void draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save) {
cairo_set_source_rgba (cr, 0., 0., 0., 1);
cairo_set_line_width (cr, 1);
Piecewise<SBasis> pws;
//pws = Geom::cos(Linear(0,100)) + 3;
pws = Geom::sqrt(Linear(0,100));
//pws = log(Interval(1,8));
//Piecewise<SBasis> l(Linear(-100,100));
//Piecewise<SBasis> one(Linear(1,1));
//pws = Geom::reciprocal(l*l + one)*l + l;
//pws = xlogx(Interval(0.5,3));
//pws = Geom::reciprocal(pws);
//pws = -integral(Geom::reciprocal(Linear(1,2)))*Piecewise<SBasis>(Linear(1,2));
pws = -pws*width/4 + width/2;
pws.scaleDomain(width/2);
pws.offsetDomain(width/4);
cairo_pw(cr, pws);
cairo_stroke(cr);
cairo_set_source_rgba (cr, 0., 0., .5, 1.);
cairo_horiz(cr, 500, pws.cuts);
cairo_stroke(cr);
*notify << "total pieces: " << pws.size();
Toy::draw(cr, notify, width, height, save);
}
void draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save) {
Geom::Point dir(1,-2);
D2<Piecewise<SBasis> > B = make_cuts_independent(path_a_pw);
cairo_set_source_rgba (cr, 0., 0.125, 0, 1);
if(0) {
D2<Piecewise<SBasis> > tB(cos(B[0]*0.1)*(brush_handle.pos[0]/100) + B[0],
cos(B[1]*0.1)*(brush_handle.pos[1]/100) + B[1]);
cairo_d2_pw_sb(cr, tB);
} else {
Piecewise<SBasis> r2 = (dot(path_a_pw - brush_handle.pos, path_a_pw - brush_handle.pos));
Piecewise<SBasis> rc;
rc.push_cut(0);
rc.push(SBasis(Linear(1, 1)), 2);
rc.push(SBasis(Linear(1, 0)), 4);
rc.push(SBasis(Linear(0, 0)), 30);
rc *= 10;
rc.scaleDomain(1000);
Piecewise<SBasis> swr;
swr.push_cut(0);
swr.push(SBasis(Linear(0, 1)), 2);
swr.push(SBasis(Linear(1, 0)), 4);
swr.push(SBasis(Linear(0, 0)), 30);
swr *= 10;
swr.scaleDomain(1000);
cairo_pw(cr, swr);// + (height - 100));
D2<Piecewise<SBasis> > uB = make_cuts_independent(unitVector(path_a_pw - brush_handle.pos));
D2<Piecewise<SBasis> > tB(compose(rc, (r2))*uB[0] + B[0],
compose(rc, (r2))*uB[1] + B[1]);
cairo_d2_pw_sb(cr, tB);
//path_a_pw = sectionize(tB);
}
cairo_stroke(cr);
*notify << path_a_pw.size();
Toy::draw(cr, notify, width, height, save);
}