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#include "region.h"
#include "utils.h"
#include "shape.h"
namespace Geom {
Region Region::operator*(Matrix const &m) const {
Region r((m.flips() ? boundary.reverse() : boundary) * m, fill);
if(box && m.onlyScaleAndTranslation()) r.box = (*box) * m;
return r;
}
bool Region::invariants() const {
return self_crossings(boundary).empty();
}
unsigned outer_index(Regions const &ps) {
if(ps.size() <= 1 || ps[0].contains(ps[1])) {
return 0;
} else {
/* Since we've already shown that chunks[0] is not outside
it can be used as an exemplar inner. */
Point exemplar = Path(ps[0]).initialPoint();
for(unsigned i = 1; i < ps.size(); i++) {
if(ps[i].contains(exemplar)) {
return i;
}
}
}
return ps.size();
}
}
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