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location:: movei structure

This commit is contained in:
Zeno Rogue 2019-11-22 16:29:53 +01:00
parent 2458ec715d
commit c6bf25b5b6
1 changed files with 22 additions and 0 deletions
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22
locations.cpp
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@ -436,4 +436,26 @@ inline cellwalker operator+ (heptspin hs, cth_t) { return cellwalker(hs.at->c7,
#endif
#if HDR
/** a structure for representing movements
* mostly for 'proper' moves where s->move(d) == t,
* but also sometimes for other moves
*/
struct movei {
cell *s;
cell *t;
int d;
bool proper() const { return d >= 0 && d < s->type && s->move(d) == t; }
movei(cell *_s, int _d) : s(_s), t(_s->move(_d)), d(_d) {}
movei(cell *_s, cell *_t, int _d) : s(_s), t(_t), d(_d) {}
movei rev() const { return movei(t, s, d >= 0 && d < s->type ? s->c.spin(d) : d); }
};
#endif
EX movei match(cell *f, cell *t) {
for(int i=0; i<f->type; i++) if(f->move(i) == t) return movei(f, t, i);
return movei(f, t, -1);
}
}