mirror of
https://github.com/Relintai/pandemonium_engine.git
synced 2024-12-26 13:47:12 +01:00
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
#include "propagator.h"
|
|
#include "wave.h"
|
|
|
|
void Propagator::init_compatible() {
|
|
std::array<int, 4> value;
|
|
// We compute the number of pattern compatible in all directions.
|
|
for (unsigned y = 0; y < wave_height; y++) {
|
|
for (unsigned x = 0; x < wave_width; x++) {
|
|
for (unsigned pattern = 0; pattern < patterns_size; pattern++) {
|
|
for (int direction = 0; direction < 4; direction++) {
|
|
value[direction] =
|
|
static_cast<unsigned>(propagator_state[pattern][get_opposite_direction(direction)]
|
|
.size());
|
|
}
|
|
compatible.get(y, x, pattern) = value;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Propagator::propagate(Wave &wave) {
|
|
// We propagate every element while there is element to propagate.
|
|
while (propagating.size() != 0) {
|
|
// The cell and pattern that has been set to false.
|
|
unsigned y1, x1, pattern;
|
|
std::tie(y1, x1, pattern) = propagating.back();
|
|
propagating.pop_back();
|
|
|
|
// We propagate the information in all 4 directions.
|
|
for (unsigned direction = 0; direction < 4; direction++) {
|
|
// We get the next cell in the direction direction.
|
|
int dx = directions_x[direction];
|
|
int dy = directions_y[direction];
|
|
int x2, y2;
|
|
if (periodic_output) {
|
|
x2 = ((int)x1 + dx + (int)wave.width) % wave.width;
|
|
y2 = ((int)y1 + dy + (int)wave.height) % wave.height;
|
|
} else {
|
|
x2 = x1 + dx;
|
|
y2 = y1 + dy;
|
|
if (x2 < 0 || x2 >= (int)wave.width) {
|
|
continue;
|
|
}
|
|
if (y2 < 0 || y2 >= (int)wave.height) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// The index of the second cell, and the patterns compatible
|
|
unsigned i2 = x2 + y2 * wave.width;
|
|
const std::vector<unsigned> &patterns =
|
|
propagator_state[pattern][direction];
|
|
|
|
// For every pattern that could be placed in that cell without being in
|
|
// contradiction with pattern1
|
|
for (auto it = patterns.begin(), it_end = patterns.end(); it < it_end;
|
|
++it) {
|
|
// We decrease the number of compatible patterns in the opposite
|
|
// direction If the pattern was discarded from the wave, the element
|
|
// is still negative, which is not a problem
|
|
std::array<int, 4> &value = compatible.get(y2, x2, *it);
|
|
value[direction]--;
|
|
|
|
// If the element was set to 0 with this operation, we need to remove
|
|
// the pattern from the wave, and propagate the information
|
|
if (value[direction] == 0) {
|
|
add_to_propagator(y2, x2, *it);
|
|
wave.set(i2, *it, false);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|