mirror of
https://github.com/zenorogue/hyperrogue.git
synced 2024-11-30 15:39:54 +00:00
268 lines
6.3 KiB
C++
268 lines
6.3 KiB
C++
// RogueViz -- SAG embedder: the implementation of Simulated Annealing
|
|
// Copyright (C) 2011-2024 Zeno Rogue, see 'hyper.cpp' for details
|
|
|
|
#include "../rogueviz.h"
|
|
|
|
namespace rogueviz {
|
|
namespace sag {
|
|
|
|
enum eSagmode { sagOff, sagHC, sagSA };
|
|
eSagmode sagmode; // 0 - off, 1 - hillclimbing, 2 - SA
|
|
const char *sagmodes[3] = {"off", "HC", "SA"};
|
|
|
|
ld temperature = 0;
|
|
|
|
int hightemp = 10;
|
|
int lowtemp = -15;
|
|
|
|
long long numiter = 0;
|
|
|
|
int vizsa_start;
|
|
int vizsa_len = 5;
|
|
|
|
bool chance(double p) {
|
|
p *= double(hrngen.max()) + 1;
|
|
auto l = hrngen();
|
|
auto pv = (decltype(l)) p;
|
|
if(l < pv) return true;
|
|
if(l == pv) return chance(p-pv);
|
|
return false;
|
|
}
|
|
|
|
bool twoway = false;
|
|
int moves, nomoves;
|
|
|
|
void saiter() {
|
|
int DN = isize(sagid);
|
|
int t1 = hrand(DN);
|
|
int sid1 = sagid[t1];
|
|
|
|
int sid2;
|
|
|
|
int s = twoway ? pick(1,4) : hrand(4)+1;
|
|
|
|
if(s == 4) sid2 = hrand(isize(sagcells));
|
|
else {
|
|
sid2 = sid1;
|
|
for(int ii=0; ii<s; ii++) sid2 = hrand_elt(neighbors[sid2]);
|
|
}
|
|
int t2 = allow_doubles ? -1 : sagnode[sid2];
|
|
|
|
sagnode[sid1] = -1; sagid[t1] = -1;
|
|
sagnode[sid2] = -1; if(t2 >= 0) sagid[t2] = -1;
|
|
|
|
double change =
|
|
costat(t1,sid2) + costat(t2,sid1) - costat(t1,sid1) - costat(t2,sid2);
|
|
|
|
sagnode[sid1] = t1; sagid[t1] = sid1;
|
|
sagnode[sid2] = t2; if(t2 >= 0) sagid[t2] = sid2;
|
|
|
|
if(change > 0 && (sagmode == sagHC || !chance(exp(-change * exp(-temperature))))) { nomoves++; return; }
|
|
moves++;
|
|
|
|
sagnode[sid1] = t2; sagnode[sid2] = t1;
|
|
sagid[t1] = sid2; if(t2 >= 0) sagid[t2] = sid1;
|
|
|
|
if(should_good) {
|
|
auto dcost = cost;
|
|
compute_cost();
|
|
println(hlog, "dcost=", dcost, " change=", change, " cost=", cost, " error = ", dcost + change - cost);
|
|
if(abs(dcost + change - cost) > .1) throw hr_exception("dcost fail");
|
|
cost = dcost;
|
|
}
|
|
|
|
cost += change;
|
|
}
|
|
|
|
ld checkmark_cost;
|
|
|
|
int hillclimb() {
|
|
int DN = isize(sagid);
|
|
int changes = 0;
|
|
vector<ld> succ;
|
|
|
|
for(int t1=0; t1<DN; t1++) {
|
|
int sid1 = sagid[t1];
|
|
for(int sid2: neighbors[sid1]) {
|
|
int t2 = allow_doubles ? -1 : sagnode[sid2];
|
|
|
|
sagnode[sid1] = -1; sagid[t1] = -1;
|
|
sagnode[sid2] = -1; if(t2 >= 0) sagid[t2] = -1;
|
|
|
|
double change =
|
|
costat(t1,sid2) + costat(t2,sid1) - (costat(t1,sid1) + costat(t2,sid2));
|
|
|
|
if(change >= -1e-10) {
|
|
sagnode[sid1] = t1; sagid[t1] = sid1;
|
|
sagnode[sid2] = t2; if(t2 >= 0) sagid[t2] = sid2;
|
|
}
|
|
else {
|
|
changes++;
|
|
sagnode[sid1] = t2; sagnode[sid2] = t1;
|
|
sagid[t1] = sid2; if(t2 >= 0) sagid[t2] = sid1;
|
|
cost += change;
|
|
succ.push_back(change);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// println(hlog, "successes = ", succ);
|
|
|
|
return changes;
|
|
}
|
|
|
|
int checkmark_hillclimb() {
|
|
compute_cost();
|
|
if(cost > checkmark_cost) {
|
|
println(hlog, "checkmark failed");
|
|
throw hr_exception("checkmark failed");
|
|
return 0;
|
|
}
|
|
checkmark_cost = cost;
|
|
return hillclimb();
|
|
}
|
|
|
|
int view_each = 1000;
|
|
|
|
void dofullsa(ld satime) {
|
|
sagmode = sagSA;
|
|
int t1 = SDL_GetTicks();
|
|
int tl = -999999;
|
|
|
|
while(true) {
|
|
int t2 = SDL_GetTicks();
|
|
double d = (t2-t1) / (1000. * satime);
|
|
if(d > 1) break;
|
|
|
|
temperature = hightemp - (d*(hightemp-lowtemp));
|
|
for(int i=0; i<10000; i++) {
|
|
numiter++;
|
|
sag::saiter();
|
|
}
|
|
|
|
if(t2 - tl > view_each * .98) {
|
|
tl = t2;
|
|
println(hlog, format("it %12lld temp %6.4f [1/e at %13.6f] cost = %f ",
|
|
numiter, double(sag::temperature), (double) exp(sag::temperature),
|
|
double(sag::cost)));
|
|
}
|
|
|
|
}
|
|
|
|
temperature = -5;
|
|
sagmode = sagOff;
|
|
create_viz();
|
|
}
|
|
|
|
/** after how many moves should we fix the values of R and T during SA */
|
|
int recost_each;
|
|
|
|
/** 2 = fix both R and T, 1 = fix only R, 0 = fix nothing, 3 = fix both R and T but avoid fixing early */
|
|
int autofix_rt;
|
|
|
|
void optimize_sag_loglik_logistic();
|
|
void compute_loglik_tab();
|
|
|
|
bool output_fullsa = true;
|
|
|
|
void dofullsa_iterations(long long saiter) {
|
|
sagmode = sagSA;
|
|
moves = 0; nomoves = 0; numiter = 0;
|
|
|
|
// decltype(SDL_GetTicks()) t1 = SDL_GetTicks();
|
|
|
|
// println(hlog, "before dofullsa_iterations, cost = ", double(sag::cost), " iterations = ", fts(saiter));
|
|
|
|
ld last_ratio;
|
|
|
|
int lpct = 0;
|
|
|
|
bool was_fixed = false;
|
|
|
|
for(int i=0; i<saiter; i++) {
|
|
|
|
temperature = hightemp - ((i+.5)/saiter*(hightemp-lowtemp));
|
|
numiter++;
|
|
sag::saiter();
|
|
|
|
if(recost_each && moves > recost_each) {
|
|
last_ratio = moves / (moves + nomoves + 0.);
|
|
if(((autofix_rt == 3 && was_fixed) || nomoves > recost_each) && autofix_rt) {
|
|
was_fixed = true;
|
|
optimize_sag_loglik_logistic();
|
|
if(autofix_rt == 1) {
|
|
lgsag.T = best.T;
|
|
compute_loglik_tab();
|
|
compute_cost();
|
|
}
|
|
}
|
|
nomoves = 0; moves = 0;
|
|
}
|
|
|
|
int cpct = numiter * 20 / (saiter-1);
|
|
|
|
if(cpct > lpct && output_fullsa) {
|
|
lpct = cpct;
|
|
println(hlog, format("it %12lld ratio %6.3f temp %8.4f step %9.3g cost %9.2f R=%8.4f T=%8.4f",
|
|
numiter, last_ratio, double(sag::temperature), (double) exp(sag::temperature), cost, lgsag.R, lgsag.T));
|
|
}
|
|
|
|
/* if(numiter % 10000 == 0) {
|
|
auto t2 = SDL_GetTicks();
|
|
if(int(t2 - t1) > view_each) {
|
|
t1 = t2;
|
|
println(hlog, format("it %12Ld temp %6.4f [1/e at %13.6f] cost = %f ",
|
|
numiter, double(sag::temperature), (double) exp(sag::temperature),
|
|
double(sag::cost)));
|
|
}
|
|
} */
|
|
}
|
|
|
|
// println(hlog, "after dofullsa_iterations, cost = ", double(sag::cost));
|
|
|
|
temperature = -5;
|
|
sagmode = sagOff;
|
|
create_viz();
|
|
}
|
|
|
|
int anneal_read_args() {
|
|
#if CAP_COMMANDLINE
|
|
using namespace arg;
|
|
|
|
if(0) ;
|
|
|
|
else if(argis("-sagtemp")) {
|
|
shift(); sag::hightemp = argi();
|
|
shift(); sag::lowtemp = argi();
|
|
}
|
|
|
|
else if(argis("-sagfull")) {
|
|
shift(); sag::dofullsa(argf());
|
|
}
|
|
else if(argis("-sagfulli")) {
|
|
shift(); sag::dofullsa_iterations(argll());
|
|
}
|
|
else if(argis("-sagmode")) {
|
|
shift();
|
|
vizsa_start = 0;
|
|
sagmode = (eSagmode) argi();
|
|
if(sagmode == sagSA) {
|
|
shift(); temperature = argf();
|
|
}
|
|
}
|
|
else if(argis("-sag-recost")) {
|
|
method = smLogistic; prepare_method();
|
|
shift(); recost_each = argi();
|
|
shift(); autofix_rt = argi();
|
|
}
|
|
|
|
else return 1;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int ahanneal = addHook(hooks_args, 100, anneal_read_args);
|
|
|
|
}
|
|
}
|