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81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
#include "propagator.h"
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#include "wave.h"
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void Propagator::init_compatible() {
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CompatibilityEntry value;
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// We compute the number of pattern compatible in all directions.
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for (uint32_t y = 0; y < wave_height; y++) {
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for (uint32_t x = 0; x < wave_width; x++) {
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for (uint32_t pattern = 0; pattern < patterns_size; pattern++) {
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for (int direction = 0; direction < 4; direction++) {
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value.direction[direction] = static_cast<uint32_t>(propagator_state[pattern].directions[get_opposite_direction(direction)].size());
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}
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compatible.get(y, x, pattern) = value;
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}
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}
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}
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}
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void Propagator::propagate(Wave &wave) {
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// We propagate every element while there is element to propagate.
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while (propagating.size() != 0) {
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// The cell and pattern that has been set to false.
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const PropagatingEntry &e = propagating[propagating.size() - 1];
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uint32_t y1 = e.data[0];
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uint32_t x1 = e.data[1];
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uint32_t pattern = e.data[2];
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propagating.resize(propagating.size() - 1);
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// We propagate the information in all 4 directions.
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for (uint32_t direction = 0; direction < 4; direction++) {
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// We get the next cell in the direction direction.
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int dx = directions_x[direction];
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int dy = directions_y[direction];
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int x2, y2;
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if (periodic_output) {
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x2 = ((int)x1 + dx + (int)wave.width) % wave.width;
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y2 = ((int)y1 + dy + (int)wave.height) % wave.height;
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} else {
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x2 = x1 + dx;
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y2 = y1 + dy;
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if (x2 < 0 || x2 >= (int)wave.width) {
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continue;
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}
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if (y2 < 0 || y2 >= (int)wave.height) {
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continue;
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}
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}
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// The index of the second cell, and the patterns compatible
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uint32_t i2 = x2 + y2 * wave.width;
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const Vector<uint32_t> &patterns = propagator_state[pattern].directions[direction];
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// For every pattern that could be placed in that cell without being in
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// contradiction with pattern1
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int size = patterns.size();
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for (int i = 0; i < size; ++i) {
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uint32_t pattern_entry = patterns[i];
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// We decrease the number of compatible patterns in the opposite
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// direction If the pattern was discarded from the wave, the element
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// is still negative, which is not a problem
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CompatibilityEntry &value = compatible.get(y2, x2, pattern_entry);
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value.direction[direction]--;
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// If the element was set to 0 with this operation, we need to remove
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// the pattern from the wave, and propagate the information
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if (value.direction[direction] == 0) {
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add_to_propagator(y2, x2, pattern_entry);
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wave.set(i2, pattern_entry, false);
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}
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}
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}
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}
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}
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