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rogueviz:: SAG did not work because of a RNG problem -- fixed
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13
rogueviz.cpp
13
rogueviz.cpp
@ -577,7 +577,7 @@ namespace sag {
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return cost;
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}
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std::mt19937 los;
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// std::mt19937 los;
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bool infullsa;
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@ -590,6 +590,15 @@ namespace sag {
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for(int i=0; i<isize(vdata[id].edges); i++)
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vdata[id].edges[i].second->orig = NULL;
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}
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bool chance(double p) {
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p *= double(hrngen.max()) + 1;
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auto l = hrngen();
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auto pv = (decltype(l)) p;
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if(l < pv) return true;
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if(l == pv) return chance(p-pv);
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return false;
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}
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void saiter() {
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aiter:
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@ -635,7 +644,7 @@ namespace sag {
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if(change < 0) chgs.push_back(-change);
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if(change > 0 && (sagmode == sagHC || los() > exp(-change * exp(-temperature)))) return;
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if(change > 0 && (sagmode == sagHC || !chance(exp(-change * exp(-temperature))))) return;
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snakenode[sid1] = t2; snakenode[sid2] = t1;
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snakeid[t1] = sid2; if(t2 >= 0) snakeid[t2] = sid1;
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