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// 09.10.29
// 09.11.15
// 10.08.17 debug (line 66)
function Menkakusi2(Face,Nf,Ptype)
global THETA PHI EyePoint FocusPoint VELNO VELHI;
Eps0=10^(-6);
Eps=10^(-4);
Tmp1=Face(1)-Face(2);
Tmp2=Face(3)-Face(2);
if norm(Tmp1)<Eps | norm(Tmp2)<Eps
return;
end;
Vec=1/norm(Tmp1)/norm(Tmp2)*Crossprod(Tmp1,Tmp2);
if norm(Vec)<Eps
return;
end;
if Ptype==-1
W=EyePoint;
Tmp=Dotprod(Vec,W-Face(1));
else
W=[sin(THETA)*cos(PHI),sin(THETA)*sin(PHI),cos(THETA)];
W=100*W;
Tmp=Dotprod(Vec,W-Face(1));
end;
if abs(Tmp)<Eps
return;
end;
if Tmp<-Eps
Vec=-Vec;
end;
if Ptype==-1
G1=Projpers(Spaceline(Face));
else
G1=Projpara(Spaceline(Face))
end;
VL=list();
for I=1:Numptcrv(G1)
VL(I)=Ptcrv(I,G1);
end;
Out1L=list();
Out2L=VELHI;
for N=1:length(VELNO)
Out1=list();
Out2=list();
Tmp=VELNO(N);
Edge=Tmp(1);
Ne=Tmp(2);
NNe=Tmp(3);
if Member(Nf,Ne)
Out1L($+1)=list(Edge,Ne,NNe);
continue;
end;
if Ptype==-1
PtA=Perspt(Edge(1));
PtB=Perspt(Edge(2));
else
PtA=Parapt(Edge(1));
PtB=Parapt(Edge(2));
end;
if norm(PtA-PtB)<Eps continue; end;
Bdy=list(G1);
V=PtB-PtA;
TenL=KoutenList(PtA,V,Bdy);
Nten=length(TenL);
if Nten==0 // 10.08.17
Out1L($+1)=list(Edge,Ne,NNe);
continue;
end;
Te=0;
Pe3=Edge(1);
if Ptype==-1
Tmp1=Perspt(Pe3);
Tmp=Invperspt(Tmp1,Spaceline(Face));
else
Tmp1=Parapt(Pe3);
Tmp=Invparapt(Tmp1,Spaceline(Face));
end;
Qe3=Tmp(1);
Flg=0;
for I=1:Nten
TenP=TenL(I);
Ts=TenP(1);
P=TenP(2);
if Ts<-Eps
continue;
end;
Eline=Spaceline(Edge);
if Ptype==-1
Tmp=Invperspt(P,Eline);
Tmp1=Invperspt(P,Spaceline(Face));
else
Tmp=Invparapt(P,Eline)
Tmp1=Invparapt(P,Spaceline(Face));
end;
P3=Tmp(1); Q3=Tmp1(1);
if Ts>1-Eps // P3, Q3 are necessary
Flg=I;
break;
end;
if abs(Te-Ts)>Eps0 //
if modulo(I,2)==1
Out1($+1)=list(Pe3,P3);
else
if Qe3==[]
Tmp=Op(2,TenL(I-1));
if Ptype==-1
Tmp1=Invperspt(Tmp,Spaceline(Face));
else
Tmp1=Invparapt(Tmp,Spaceline(Face));
end;
Qe3=Tmp1(1);
end;
PM=0.5*(Pe3+P3); QM=0.5*(Qe3+Q3);
if Ptype==-1
Z1=Zperspt(PM); Z2=Zperspt(QM);
else
Z1=Zparapt(PM); Z2=Zparapt(QM);
end;
if Z1>Z2
Out1($+1)=list(Pe3,P3);
else
Out2($+1)=list(Pe3,P3);
end;
end;
end;
Te=Ts; Pe3=P3; Qe3=Q3;
end;
if Flg==0
if norm(Pe3-Edge(2))>Eps0
Out1($+1)=list(Pe3,Edge(2));
end;
else
if modulo(Flg,2)==1
Out1($+1)=list(Pe3,Edge(2));
else
PM=0.5*(Pe3+P3); QM=0.5*(Qe3+Q3);
if Ptype==-1
Z1=Zperspt(PM); Z2=Zperspt(QM);
else
Z1=Zparapt(PM); Z2=Zparapt(QM);
end;
if Z1>Z2
Out1($+1)=list(Pe3,Edge(2));
else
Out2($+1)=list(Pe3,Edge(2));
end;
end;
end;
for I=1:length(Out1)
Tmp=Out1(I);
if I==1
SeL=Tmp;
else
if norm(SeL(2)-Tmp(1))<Eps0
SeL(2)=Tmp(2);
else
Out1L($+1)=list(SeL,Ne,NNe);
SeL=Tmp;
end;
end;
end;
if length(Out1)>0
Out1L($+1)=list(SeL,Ne,NNe);
end;
for I=1:length(Out2)
Tmp=Out2(I);
if I==1
SeL=Tmp;
else
if norm(SeL(2)-Tmp(1))<Eps0
SeL(2)=Tmp(2);
else
Out2L($+1)=list(SeL,Ne,NNe);
SeL=Tmp;
end;
end;
end;
if length(Out2)>0
Out2L($+1)=list(SeL,Ne,NNe);
end;
end;
VELNO=Out1L;
VELHI=Out2L;
endfunction
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