Approx_poly::Approx_poly
(
const ElFifo<Pt2dr> & fp,
ArgAPP arg
) :
_arg (arg)
{
_ind0 = get_best_intexe(fp,arg.InitWithEnvConv());
_circ = fp.circ();
init(fp.nb()+_circ,arg);
for (int i = 0; i<_nb; i++)
_s[i].set_pt(fp[i+_ind0]);
if (arg._freem_sup)
{
INT nb_sup = 0;
for
(
INT k0 = _nb-1;
k0>=2;
k0--
)
{
INT k1 = k0-1;
while (freem_supprimable(k1))
{
k1--;
_s[k0]._pred = _s+k1;
_s[k1]._next = _s+k0;
nb_sup++;
}
}
}
}
REAL surf_or_poly(const ElFifo<Pt2dr> & f)
{
REAL res = 0.0;
for (INT k=0; k<f.nb(); k++)
res += f[k]^f[k+1];
return res /2.0;
}
void EL_API_MAKE_VECTO::action // => Br_Vect_Action
(
const ElFifo<Pt2di> & pts,
const ElFifo<INT> * args,
INT
)
{
const ElFifo<INT> & dist = args[0];
approx_poly(_approx,pts,_arg_app);
for (INT kAp=1 ; kAp< _approx.nb() ; kAp++)
{
INT k1 = _approx[kAp-1];
INT k2 = _approx[kAp];
_pts_interm.clear();
_d_interm.clear();
for (INT k=k1 ; k<= k2 ; k++)
{
_pts_interm.push_back(Pt2d2complex(pts[k]+_dec));
_d_interm.push_back(dist[k]);
}
_call_back.ElVectoAction
(
Pt2d2complex(pts[k1]+_dec),
Pt2d2complex(pts[k2]+_dec),
_pts_interm,
_d_interm
);
}
}
void HPoly
(
ActionSeg & Act,
ElFifo<Pt2dr> & f,
Pt2dr dir,
REAL esp
)
{
REAL omax = -1e50;
REAL omin = 1e50;
SegComp s0 (Pt2dr(0,0),dir);
for (INT k=0; k<f.nb() ; k++)
{
REAL ord = s0.ordonnee(f[k]);
ElSetMax(omax,ord);
ElSetMin(omin,ord);
}
for (REAL ord = round_up(omin/esp) *esp; ord<omax; ord += esp)
{
Pt2dr p0 = s0.from_rep_loc(Pt2dr(0.0,ord));
ClipSeg(Act,f,Seg2d(p0,p0+s0.tangente()));
}
}
template <class T> INT get_best_intexe(const ElFifo<T> & fp,bool EnvConv)
{
if (! fp.circ())
return 0;
if (fp.nb() < 4)
return 0;
INT delta = EnvConv ? 1 : std::min(5,(fp.nb()-2)/2);
REAL min_cos = 10.0;
INT best_index = 0;
std::vector<INT> aVOk;
std::vector<INT> aVPrec;
std::vector<INT> aVSucc;
for(INT aK=0 ; aK<INT(fp.size()) ; aK++)
{
aVOk.push_back(EnvConv ? 0 : 1);
aVPrec.push_back(aK-delta);
aVSucc.push_back(aK+delta);
}
if (EnvConv)
{
ElFilo<Pt2dr> aFLP;
for(INT aK=0 ; aK<INT(fp.size()) ; aK++)
aFLP.pushlast(fp[aK]);
ElFifo<INT> Ind;
env_conv(Ind,aFLP,true);
for (INT aK=0 ; aK<Ind.nb() ; aK++)
{
aVOk[Ind[aK]] = 1;
aVPrec[Ind[aK]] = Ind[(aK-1+Ind.nb())%Ind.nb()];
aVSucc[Ind[aK]] = Ind[(aK+1)%Ind.nb()];
}
}
for (INT k =0 ; k<fp.nb() ; k++)
{
if (aVOk[k])
{
T u1 = fp[k]-fp[aVPrec[k]];
T u2 = fp[aVSucc[k]]-fp[k];
double d1 = euclid(u1);
double d2 = euclid(u2);
if (d1 && d2)
{
double cosin = scal(u1,u2) / (d1*d2);
if (cosin < min_cos)
{
min_cos = cosin;
best_index = k;
}
}
}
}
return best_index ;
}
void BoxPts(ElFifo<Pt2dr> & pts,Pt2dr & p0,Pt2dr & p1)
{
p0 = pts[0];
p1 = pts[0];
for (INT k=0 ; k<pts.nb() ; k++)
{
p0.SetInf(pts[k]);
p1.SetSup(pts[k]);
}
}
void action(const ElFifo<Pt2di> & pts,bool ext)
{
if (ext)
_nb_ext ++;
else
_nb_int ++;
ElList<Pt2di> l;
for (INT k=0; k<pts.nb(); k++)
l = l + pts[k];
ELISE_COPY ( polygone(l,ext), (_check.in()+1) % 2, _check.out());
}
void ClipSeg
(
ActionSeg & Act,
ElFifo<Pt2dr> & f,
SegComp seg
)
{
f.set_circ(true);
Act._events.clear();
bool OrTrig = (surf_or_poly(f) >= 0);
for (INT k=0; k<f.nb() ; k++)
{
Pt2dr p0 = seg.to_rep_loc(f[k]);
Pt2dr p1 = seg.to_rep_loc(f[k+1]);
if ((p0.y>0) != (p1.y>0))
{
bool entr = (p0.y>0);
if (!OrTrig)
entr = ! entr;
REAL absc = p0.x-p0.y*((p1.x-p0.x)/(p1.y-p0.y)) ;
Act._events.add_ev(EventInterv(absc,entr));
}
}
Act._intervs.init(Act._events);
const ElFilo<Interval> & intervs = Act._intervs.intervs();
{
for (INT k=0 ; k<intervs.nb() ; k++)
{
Pt2dr p0 (intervs[k]._v0,0.0);
Pt2dr p1 (intervs[k]._v1,0.0);
Act.action_seg
(
Seg2d
(
seg.from_rep_loc(p0),
seg.from_rep_loc(p1)
)
);
}
}
}
REAL SquareDistPointPoly(const ElFifo<Pt2dr> & f,Pt2dr pt)
{
if ( PointInPoly(f,pt))
return 0;
REAL d2 = 1e40;
for (INT k=0; k<f.nb() ; k++)
ElSetMin
(
d2,
SegComp(f[k],f[k+1]).square_dist_seg(pt)
);
return d2;
}
bool PointInterieurPoly(const ElFifo<Pt2dr> & f,Pt2dr pt,REAL d)
{
if (! PointInPoly(f,pt))
return false;
REAL d2 = ElSquare(d);
for (INT k=0; k<f.nb() ; k++)
{
Pt2dr q0 = f[k];
Pt2dr q1 = f[k+1];
if ((q0!=q1) && (SegComp(q0,q1).square_dist_seg(pt) < d2))
return false;
}
return true;
}
void bench_dist_point_seg_droite()
/*
On tire un segment vertical V et un point p, le calcul de d0 = D2(V,p)
est trivial ;
On tire une rotation affine r, soit d1 la distance r(V), r(p),
elle doit etre invariante par rotation. Ce processus donne
des pointe te sgement quelconuq
on verifie d1=d0
*/
{ INT f;
for (f =0; f< 1000; f++)
{
ElFifo<Pt2dr> poly;
poly.set_circ(NRrandom3() > 0.5);
random_polyl(poly,(INT)(2+20*NRrandom3()));
SegComp s = random_seg(true);
SegComp::ModePrim mode = ran_prim_seg();
ElFifo<Pt2dr> inters;
ElFifo<INT > index;
s.inter_polyline(mode,poly,index,inters);
for (INT k=0; k<index.nb(); k++)
{
INT ind = index[k];
Pt2dr inter = inters[k];
Pt2dr p0 = poly[ind];
Pt2dr p1 = poly[ind+1];
BENCH_ASSERT
(
(s.square_dist(mode,inter)<epsilon)
&& (SegComp(p0,p1).square_dist_seg(inter) < epsilon)
);
}
if ((mode==SegComp::droite) && poly.circ())
BENCH_ASSERT((inters.nb()%2)==0);
}
for ( f = 0; f<10000 ; f++)
{
bool ok;
SegComp::ModePrim m0 = ran_prim_seg();
SegComp::ModePrim m1 = ran_prim_seg();
SegComp s0 = random_seg(true);
SegComp s1 = SegNotPar(s0);
Pt2dr i = s0.inter(m0,s1,m1,ok);
BENCH_ASSERT
(
(s0.square_dist_droite(i) < BIG_epsilon)
&& (s1.square_dist_droite(i) < BIG_epsilon)
);
if ( pt_loin_from_bande(s0,i)
&& pt_loin_from_bande(s1,i)
)
{
BENCH_ASSERT
(
ok == ( seg_prim_inside(s0,i,m0)
&& seg_prim_inside(s1,i,m1)
)
);
}
}
for ( f = 0; f<10000 ; f++)
{
Pt2dr p1 = Pt2dr(0,NRrandom3()*1e3);
Pt2dr p2 = Pt2dr(0,p1.y +10+1e3*NRrandom3());
Pt2dr q = Pt2dr((NRrandom3()-0.5)*1e4,(NRrandom3()-0.5)*1e4);
SegComp::ModePrim mode = ran_prim_seg();
Pt2dr proj_q = Pt2dr(0,q.y);
Pt2dr projP_q = proj_q;
double d0 = ElSquare(q.x);
double dp0 = d0;
if (proj_q.y>p2.y)
{
if (mode == SegComp::seg)
{
dp0 += ElSquare(proj_q.y-p2.y);
projP_q.y = p2.y;
}
}
else if (proj_q.y<p1.y)
{
if (mode != SegComp::droite)
{
dp0 += ElSquare(proj_q.y-p1.y);
projP_q.y = p1.y;
}
}
Pt2dr tr = Pt2dr((NRrandom3()-0.5)*1e5,(NRrandom3()-0.5)*1e5);
REAL teta = NRrandom3() *100;
Pt2dr rot(cos(teta),sin(teta));
p1 = tr + p1 * rot;
p2 = tr + p2 * rot;
q = tr + q * rot;
proj_q = tr + proj_q * rot;
projP_q = tr + projP_q * rot;
SegComp s(p1,p2);
REAL d1 = s.square_dist_droite(q);
REAL dp1 = s.square_dist(mode,q);
BENCH_ASSERT(std::abs(d0 -d1) < BIG_epsilon);
BENCH_ASSERT(std::abs(dp0 -dp1) < BIG_epsilon);
Pt2dr proj_q_2 = s.proj_ortho_droite(q);
BENCH_ASSERT( euclid(proj_q-proj_q_2) < BIG_epsilon);
BENCH_ASSERT(euclid(projP_q,s.proj_ortho(mode,q))<BIG_epsilon);
}
for ( f = 0; f<10000 ; f++)
{
REAL rho = 1+NRrandom3()*1e3;
REAL teta = (NRrandom3()-0.5)*1.9999*PI;
Pt2dr p1 = Pt2dr::FromPolar(rho,teta);
REAL teta2 = angle(p1);
Pt2dr p2 = Pt2dr::FromPolar(1+NRrandom3()*1e3,NRrandom3()*1e3);
REAL teta3 = angle(p2,p1*p2);
BENCH_ASSERT(std::abs(teta2-teta)<epsilon);
BENCH_ASSERT(std::abs(teta3-teta)<epsilon);
}
for ( f =0; f< 2000; f++)
{
SegComp::ModePrim m0 = ran_prim_seg();
SegComp::ModePrim m1 = ran_prim_seg();
SegComp s0 = random_seg(true);
SegComp s1 = SegNotPar(s0);
Seg2d proj = s0.proj_ortho(m0,s1,m1);
BENCH_ASSERT
(
std::abs
(
square_euclid(proj.p0()-proj.p1())
-s0.square_dist(m0,s1,m1)
) < epsilon
);
BENCH_ASSERT
(
(s0.square_dist(m0,proj.p0())<epsilon)
&& (s1.square_dist(m1,proj.p1())<epsilon)
);
for (INT k=0; k< 8*(2+(INT)m0)*(2+(INT)m1) ; k++)
{
Pt2dr q0 = proj.p0() + s0.tangente()*((NRrandom3()-0.5) * (1<<(k%10))) ;
Pt2dr q1 = proj.p1() + s1.tangente()*((NRrandom3()-0.5) * (1<<(k%10))) ;
q0 = s0.proj_ortho(m0,q0);
q1 = s1.proj_ortho(m1,q1);
BENCH_ASSERT
(
euclid(proj.p0(),proj.p1())
< (euclid(q0,q1)+epsilon)
);
}
}
cout << "OK OK OK DIIIIIIST \n";
}
