mirror of
https://github.com/zenorogue/hyperrogue.git
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285 lines
7.3 KiB
C++
285 lines
7.3 KiB
C++
// here the embeddings used in our experiments are implemented
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// Copyright (C) 2011-2022 Tehora and Zeno Rogue, see 'hyper.cpp' for details
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#include "kohonen.h"
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namespace rogueviz {
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namespace embeddings {
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embedding_type etype = eNatural;
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/** landscape embedding */
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map<cell*, kohvec> landscape_at;
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map<cellwalker, kohvec> delta_at;
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map<cellwalker, int> delta_id;
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int qdelta;
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void init_landscape(int dimensions) {
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etype = eLandscape;
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landscape_at.clear();
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delta_at.clear();
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delta_id.clear();
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qdelta = 0;
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landscape_at[currentmap->gamestart()].resize(dimensions, 0);
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println(hlog, "initialized for ", currentmap->gamestart());
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}
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kohvec& get_landscape_at(cell *h);
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void init_landscape_det(const vector<cell*>& ac) {
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etype = eLandscape;
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landscape_at.clear();
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delta_at.clear();
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delta_id.clear();
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qdelta = 0;
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landscape_at[currentmap->gamestart()].resize(0, 0);
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for(cell *c: ac) get_landscape_at(c);
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int dimensions = isize(delta_at);
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landscape_at.clear();
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landscape_at[currentmap->gamestart()].resize(dimensions, 0);
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println(hlog, "qdelta = ", qdelta, " size of delta_at = ", isize(delta_at));
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for(auto& d: delta_at) {
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d.second.resize(dimensions, 0);
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// d.second[id++] = 1;
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d.second[delta_id[d.first]] = 1;
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}
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println(hlog, "initialized for ", currentmap->gamestart(), ", dimensions = ", dimensions);
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}
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void normalize(cellwalker& cw) {
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int d = celldist(cw.at);
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back:
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if(GDIM == 3) {
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auto& da = currentmap->dirdist(cw.at);
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for(int j=0; j<S7; j++) if(da[j] == 1) {
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cellwalker str = currentmap->strafe(cw, j);
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int d1 = celldist(str.at);
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if(d1 == d+1) continue;
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else if(d1 == d-1) { d = d1; cw = str; goto back; }
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else println(hlog, tie(d, d1));
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}
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}
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else if(S3 == OINF) return;
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else if(S3 == 4) for(int s: {1, -1}) {
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cellwalker str = (cw + s) + wstep + s;
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int d1 = celldist(str.at);
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if(d1 < d) { d = d1; cw = str; goto back; }
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}
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else {
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while(true) {
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cellwalker str = (cw + 1) + wstep + 2;
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int d1 = celldist(str.at);
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if(d1 > d) break;
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d = d1; cw = str;
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}
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while(true) {
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cellwalker str = (cw - 2) + wstep - 1;
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int d1 = celldist(str.at);
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if(d1 > d) break;
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d = d1; cw = str;
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}
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}
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}
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ld hrandd() {
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return ((hrngen() & HRANDMAX) + .5) / HRANDMAX;
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}
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ld gaussian_random() {
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ld u1 = hrandd();
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ld u2 = hrandd();
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return sqrt(-2*log(u1)) * cos(2*M_PI*u2);
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}
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void apply_delta(cellwalker cw, kohvec& v) {
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normalize(cw);
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auto& da = delta_at[cw];
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if(!delta_id.count(cw)) {
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delta_id[cw] = qdelta++;
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da.resize(isize(v));
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for(int i=0; i<min(200, isize(da)); i++)
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if(i < isize(da)) da[i] = gaussian_random();
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}
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for(int i=0; i<isize(v); i++) v[i] += da[i];
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}
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kohvec& get_landscape_at(cell *h) {
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if(landscape_at.count(h)) return landscape_at[h];
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int hd = celldist(h);
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// if(hd > 2) exit(1);
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for(int i=0; i<h->type; i++) {
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cell *h1 = h->cmove(i);
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auto hd1 = celldist(h1);
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if(hd1 < hd) {
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cellwalker cw(h, i);
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auto& res = landscape_at[h];
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res = get_landscape_at(h1);
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if(S3 == 3) {
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apply_delta(cw, res);
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apply_delta(cw+1, res);
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}
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else
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apply_delta(cw, res);
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break;
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}
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}
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return landscape_at[h];
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}
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/** signposts embedding */
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vector<cell*> signposts;
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void mark_signposts(bool full, const vector<cell*>& ac) {
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etype = eSignpost;
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println(hlog, "marking signposts");
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signposts.clear();
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int maxd = 0;
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if(!closed_manifold)
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for(cell *c: ac) maxd = max(celldist(c), maxd);
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for(cell *c: ac)
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if(full || c->type != 6)
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if(closed_manifold || celldist(c) == maxd)
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signposts.push_back(c);
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}
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/** special signposts */
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void mark_signposts_subg(int a, int b, const vector<cell*>& ac) {
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etype = eSignpost;
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println(hlog, "marking bitrunc signposts");
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signposts.clear();
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int maxd = 0;
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if(!closed_manifold)
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for(cell *c: ac) maxd = max(celldist(c), maxd);
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for(cell *c: ac) {
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auto li = gp::get_local_info(c);
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auto rel = li.relative * gp::loc(a, b);
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auto rel2 = rel * gp::param.conj();
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rel2 = rel2 / (gp::param * gp::param.conj()).first;
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if(rel2 * gp::param == rel)
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signposts.push_back(c);
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}
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}
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/** rug embedding */
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map<cell*, hyperpoint> rug_coordinates;
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void generate_rug(int i, bool close) {
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etype = eHypersian;
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rug::init();
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while(rug::precision_increases < i) rug::physics();
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if(close) rug::close();
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for(auto p: rug::rug_map)
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rug_coordinates[p.first] = p.second->native;
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}
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/** main function */
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void get_coordinates(kohvec& v, cell *c, cell *c0) {
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switch(etype) {
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case eLandscape: {
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v = get_landscape_at(c);
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columns = isize(v);
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break;
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}
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case eSignpost:
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columns = isize(signposts);
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alloc(v);
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for(int i=0; i<isize(signposts); i++)
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v[i] = celldistance(signposts[i], c);
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break;
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case eHypersian: {
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columns = 3;
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alloc(v);
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auto h = rug_coordinates.at(c);
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for(int i=0; i<3; i++) v[i] = h[i];
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break;
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}
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case eNatural: {
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hyperpoint h = calc_relative_matrix(c, c0, C0) * C0;
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using namespace euc;
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auto& T0 = eu_input.user_axes;
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if(sphere) {
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columns = MDIM;
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alloc(v);
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for(int i=0; i<MDIM; i++)
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v[i] = h[i];
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}
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else if(euclid && closed_manifold && S3 == 3 && WDIM == 2 && T0[0][1] == 0 && T0[1][0] == 0 && T0[0][0] == T0[1][1]) {
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columns = 6;
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alloc(v);
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int s = T0[0][0];
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for(int i=0; i<3; i++) {
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hyperpoint h1 = spin(120*degree*i) * h;
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ld x = h1[1];
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ld alpha = 2 * M_PI * x / s / (sqrt(3) / 2);
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// println(hlog, kz(x), " -> ", kz(alpha));
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v[2*i] = cos(alpha);
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v[2*i+1] = sin(alpha);
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}
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// println(hlog, kz(h), " -> ", v);
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}
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else if(euclid && closed_manifold && WDIM == 2) {
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columns = 4;
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alloc(v);
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rug::clifford_torus ct;
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h = ct.torus_to_s4(ct.actual_to_torus(h));
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for(int i=0; i<4; i++)
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v[i] = h[i];
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}
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else if(euclid && closed_manifold && WDIM == 3) {
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columns = 6;
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alloc(v);
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using namespace euc;
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auto& T0 = eu_input.user_axes;
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for(int i=0; i<3; i++) {
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int s = T0[i][i];
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ld alpha = 2 * M_PI * h[i] / s;
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v[2*i] = cos(alpha) * s;
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v[2*i+1] = sin(alpha) * s;
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}
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}
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else if(euclid && !quotient) {
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columns = WDIM;
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alloc(v);
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for(int i=0; i<WDIM; i++)
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v[i] = h[i];
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}
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else {
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println(hlog, "error: unknown geometry to get coordinates from");
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exit(1);
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}
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break;
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}
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case eProjection: {
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hyperpoint h = calc_relative_matrix(c, c0, C0) * C0;
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hyperpoint res;
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applymodel(shiftless(h), res);
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columns = WDIM;
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if(models::is_3d(pconf)) columns = 3;
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alloc(v);
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for(int i=0; i<columns; i++) v[i] = res[i];
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}
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}
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}
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}
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}
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