virtual void onDraw(){
getMouse();
static Dls dls = Ro::dls(5.0, 0,-5,0);
Touch(interface,dls);
static Dlp dlp = Vec(0,1,1).unit() + Inf(0);
Touch(interface,dlp);
Draw(dlp,0,1,0);
//some lines
int iter = 50;
float spacing = 10;
vector<Lin> lines(iter);
int it = 0;
for ( auto &i : lines ){
it += 1;
float t = -spacing/2.0 + spacing * (float) it / iter;
//Top curvature
Par tp = Par( Tnv(0,0,amtA) ).trs(0,3,0);
auto bstA = Gen::bst( tp );
Pnt tpnt = Ro::point( t, 3, 0 );
Dll dll = (tpnt ^ Vec::y ^ Inf(1) ).dual();
Pnt pa = Ro::loc( tpnt.spin( bstA ) );
//Bottom Curvature
Par bp = Par( Tnv(0,0,amtB) ).trs(0,-3,0);
auto bstB = Gen::bst( bp );
Pnt bpnt = Ro::point( t, -3, 0 );
Pnt pb = Ro::loc( bpnt.spin( bstB ) );
i = pa ^ pb ^ Inf(1); i = i.runit();
Draw(i);
Pnt rp = ( i.dual() ^ dlp ).dual().unit().null();
Draw(rp,1,0,1);
Draw(pa,1,0,0); Draw(tpnt,0,1,0); Draw(pb,1,0,0);
// Par itp = Par( Tnv(0,0,amtA) ).trs ( Fl::loc( LN(0,1,0), rp, false ) );
// auto ibst = Gen::bst(itp);
//
VT dist = Ro::dist( pa, rp );
Pnt rpp = Ro::loc( Ro::split( ( Ro::dls( tpnt, dist ) ^ dll ).dual(), false )) ;
VT dist2 = Ro::dist( tpnt, rpp );
// cout << dist << " " << dist2 << endl;
// Pnt rpp = Ro::loc( rp.spin( !ibst ) ); //inverse operation
Draw( rpp, 1,1, 0);
auto ri = i.reflect(dlp);
Draw(ri,0,0,1);
}
// Draw(dls,0,1,1,.2);
}
