christoph/cpp-masssprings
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squash merge threaded-physics into main

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This commit is contained in:
Christoph Urlacher
2026-02-24 18:45:13 +01:00
parent 3e87bbb6a5
commit 8a4e5c1ebf
15 changed files with 553 additions and 466 deletions
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30
src/puzzle.cpp
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@ -1,6 +1,8 @@
#include "puzzle.hpp"
#include "tracy.hpp"
#include <unordered_set>
auto Block::Hash() const -> int {
std::string s = std::format("{},{},{},{}", x, y, width, height);
return std::hash<std::string>{}(s);
@ -262,11 +264,16 @@ auto State::GetNextStates() const -> std::vector<State> {
return new_states;
}
auto State::Closure() const -> std::pair<std::unordered_set<State>,
std::vector<std::pair<State, State>>> {
std::unordered_set<State> states;
std::vector<std::pair<State, State>> links;
auto State::Closure() const
-> std::pair<std::vector<State>,
std::vector<std::pair<std::size_t, std::size_t>>> {
std::vector<State> states;
std::vector<std::pair<std::size_t, std::size_t>> links;
// Helper to construct the links vector
std::unordered_map<State, std::size_t> state_indices;
// Buffer for all states we want to call GetNextStates() on
std::unordered_set<State> remaining_states;
remaining_states.insert(*this);
@ -274,13 +281,18 @@ auto State::Closure() const -> std::pair<std::unordered_set<State>,
const State current = *remaining_states.begin();
remaining_states.erase(current);
std::vector<State> new_states = current.GetNextStates();
for (const State &s : new_states) {
if (!states.contains(s)) {
if (!state_indices.contains(current)) {
state_indices.emplace(current, states.size());
states.push_back(current);
}
for (const State &s : current.GetNextStates()) {
if (!state_indices.contains(s)) {
remaining_states.insert(s);
states.insert(s);
state_indices.emplace(s, states.size());
states.push_back(s);
}
links.emplace_back(current.state, s.state);
links.emplace_back(state_indices.at(current), state_indices.at(s));
}
} while (remaining_states.size() > 0);