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Got rid of the EntropyMemoisation struct as it just makes readability worse.

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Relintai 2022-04-21 20:14:31 +02:00
parent a501292046
commit fdb6ced123
2 changed files with 23 additions and 31 deletions
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36
modules/wfc/wave.cpp
View File

@ -52,20 +52,20 @@ Wave::Wave(uint32_t height, uint32_t width,
double log_base_s = log(base_s);
double entropy_base = log_base_s - base_entropy / base_s;
memoisation.plogp_sum.resize(width * height);
memoisation.plogp_sum.fill(base_entropy);
memoisation_plogp_sum.resize(width * height);
memoisation_plogp_sum.fill(base_entropy);
memoisation.sum.resize(width * height);
memoisation.sum.fill(base_s);
memoisation_sum.resize(width * height);
memoisation_sum.fill(base_s);
memoisation.log_sum.resize(width * height);
memoisation.log_sum.fill(log_base_s);
memoisation_log_sum.resize(width * height);
memoisation_log_sum.fill(log_base_s);
memoisation.nb_patterns.resize(width * height);
memoisation.nb_patterns.fill(static_cast<uint32_t>(nb_patterns));
memoisation_nb_patterns.resize(width * height);
memoisation_nb_patterns.fill(static_cast<uint32_t>(nb_patterns));
memoisation.entropy.resize(width * height);
memoisation.entropy.fill(entropy_base);
memoisation_entropy.resize(width * height);
memoisation_entropy.fill(entropy_base);
}
void Wave::set(uint32_t index, uint32_t pattern, bool value) {
@ -78,14 +78,14 @@ void Wave::set(uint32_t index, uint32_t pattern, bool value) {
// Otherwise, the memoisation should be updated.
data.get(index, pattern) = value;
memoisation.plogp_sum.write[index] -= plogp_patterns_frequencies[pattern];
memoisation.sum.write[index] -= patterns_frequencies[pattern];
memoisation.log_sum.write[index] = log(memoisation.sum[index]);
memoisation.nb_patterns.write[index]--;
memoisation.entropy.write[index] = memoisation.log_sum[index] - memoisation.plogp_sum[index] / memoisation.sum[index];
memoisation_plogp_sum.write[index] -= plogp_patterns_frequencies[pattern];
memoisation_sum.write[index] -= patterns_frequencies[pattern];
memoisation_log_sum.write[index] = log(memoisation_sum[index]);
memoisation_nb_patterns.write[index]--;
memoisation_entropy.write[index] = memoisation_log_sum[index] - memoisation_plogp_sum[index] / memoisation_sum[index];
// If there is no patterns possible in the cell, then there is a contradiction.
if (memoisation.nb_patterns[index] == 0) {
if (memoisation_nb_patterns[index] == 0) {
is_impossible = true;
}
}
@ -104,14 +104,14 @@ int Wave::get_min_entropy(std::minstd_rand &gen) const {
for (uint32_t i = 0; i < size; i++) {
// If the cell is decided, we do not compute the entropy (which is equal
// to 0).
double nb_patterns_local = memoisation.nb_patterns[i];
double nb_patterns_local = memoisation_nb_patterns[i];
if (nb_patterns_local == 1) {
continue;
}
// Otherwise, we take the memoised entropy.
double entropy = memoisation.entropy[i];
double entropy = memoisation_entropy[i];
// We first check if the entropy is less than the minimum.
// This is important to reduce noise computation (which is not

18
modules/wfc/wave.h
View File

@ -5,18 +5,6 @@
#include <random>
#include "core/vector.h"
// Struct containing the values needed to compute the entropy of all the cells.
// This struct is updated every time the wave is changed.
// p'(pattern) is equal to patterns_frequencies[pattern] if wave.get(cell,
// pattern) is set to true, otherwise 0.
struct EntropyMemoisation {
Vector<double> plogp_sum; // The sum of p'(pattern)// log(p'(pattern)).
Vector<double> sum; // The sum of p'(pattern).
Vector<double> log_sum; // The log of sum.
Vector<uint32_t> nb_patterns; // The number of patterns present
Vector<double> entropy; // The entropy of the cell.
};
// Contains the pattern possibilities in every cell.
// Also contains information about cell entropy.
class Wave {
@ -31,7 +19,11 @@ private:
// This is used to define the maximum value of the noise.
const double min_abs_half_plogp;
EntropyMemoisation memoisation;
Vector<double> memoisation_plogp_sum; // The sum of p'(pattern)// log(p'(pattern)).
Vector<double> memoisation_sum; // The sum of p'(pattern).
Vector<double> memoisation_log_sum; // The log of sum.
Vector<uint32_t> memoisation_nb_patterns; // The number of patterns present
Vector<double> memoisation_entropy; // The entropy of the cell.
// This value is set to true if there is a contradiction in the wave (all elements set to false in a cell).
bool is_impossible;