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arb:: Conway notation command

This commit is contained in:
Zeno Rogue 2019-12-27 23:00:07 +01:00
parent bf80ef7451
commit bdcad95f73
1 changed files with 26 additions and 0 deletions
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26
arbitrile.cpp
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@ -175,6 +175,32 @@ void load(const string& fname) {
cc.build_from_angles_edges();
cc.connections.resize(cc.size());
}
else if(ep.eat("conway(\"")) {
string s = "";
while(true) {
int m = 0;
if(ep.eat("(")) m = 0;
else if(ep.eat("[")) m = 1;
else if(ep.eat("\"")) break;
else throw hr_parse_exception("cannot parse Conway notation");
int ai = 0;
int as = ep.iparse();
while(ep.eat("'")) ai++;
if(ep.eat("@")) ai = ep.iparse();
int bi = 0, bs = 0;
if(ep.eat(")") || ep.eat("]")) bs = as, bi = ai;
else {
bs = ep.iparse();
while(ep.eat("'")) bi++;
if(ep.eat("@")) bi = ep.iparse();
}
if(ep.eat(")") || ep.eat("]")) {}
c.shapes[ai].connections[as] = make_tuple(bi, bs, m);
c.shapes[bi].connections[bs] = make_tuple(ai, as, m);
}
ep.force_eat(")");
}
else if(ep.eat("c(")) {
int ai = ep.iparse(); verify_index(ai, c.shapes); ep.force_eat(",");
int as = ep.iparse(); verify_index(as, c.shapes[ai]); ep.force_eat(",");