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cellwalker difference functions

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Zeno Rogue
2025-10-07 21:52:24 +02:00
parent a9063f1c15
commit 4708d9f479
1 changed files with 17 additions and 0 deletions
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locations.cpp
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@@ -476,6 +476,23 @@ inline cellwalker operator+ (heptspin hs, cth_t) { return cellwalker(hs.at->c7,
EX bool proper(cell *c, int d) { return d >= 0 && d < c->type; } EX bool proper(cell *c, int d) { return d >= 0 && d < c->type; }
/** return b-a, as in, a number x such that a+x == b. */
EX int cwdiff(cellwalker b, cellwalker a) {
return a.mirrored ? a.spin - b.spin : b.spin - a.spin;
}
/** like cwdiff but normalize to [0..type-1) */
EX int cwdiff_fixed(cellwalker b, cellwalker a) {
return gmod(cwdiff(b, a), b.at->type);
}
/** return c+(b-a) */
EX cellwalker cw_add_diff(cellwalker c, cellwalker b, cellwalker a) {
c += cwdiff(b, a);
if(a.mirrored != b.mirrored) c += wmirror;
return c;
}
#if HDR #if HDR
constexpr int STRONGWIND = 199; constexpr int STRONGWIND = 199;