76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
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// src/gol.cpp
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#include <gdextension_interface.h>
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#include <godot_cpp/classes/ref_counted.hpp>
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#include <godot_cpp/core/class_db.hpp>
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#include <godot_cpp/core/defs.hpp>
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#include <godot_cpp/godot.hpp>
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#include <godot_cpp/variant/array.hpp>
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using namespace godot;
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class GoL : public RefCounted {
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GDCLASS(GoL, RefCounted);
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static void _bind_methods() {
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ClassDB::bind_method(D_METHOD("step_once", "arr", "n"), &GoL::step_once);
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}
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static int neighs(const Array &a, int n, int x, int y) {
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int s = 0;
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for (int dy = -1; dy <= 1; ++dy) {
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for (int dx = -1; dx <= 1; ++dx) {
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if (dx == 0 && dy == 0)
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continue;
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const int nx = ((x + dx) % n + n) % n;
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const int ny = ((y + dy) % n + n) % n;
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const Array row = a[ny];
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s += (int)row[nx];
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}
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}
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return s;
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}
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public:
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Array step_once(const Array &arr, int n) const {
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Array next;
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next.resize(n);
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for (int y = 0; y < n; ++y) {
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Array row;
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row.resize(n);
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const Array crow = arr[y];
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for (int x = 0; x < n; ++x) {
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const bool alive = ((int)crow[x]) == 1;
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const int cn = neighs(arr, n, x, y);
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row.set(x, alive ? int(cn == 2 || cn == 3) : int(cn == 3));
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}
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next.set(y, row);
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}
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return next;
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}
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};
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extern "C" GDExtensionBool GDE_EXPORT
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gol_library_init(GDExtensionInterfaceGetProcAddress get_proc_address,
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GDExtensionClassLibraryPtr library,
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GDExtensionInitialization *r_initialization) {
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static GDExtensionBinding::InitObject init(get_proc_address, library,
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r_initialization);
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init.register_initializer([](ModuleInitializationLevel p_level) {
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if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE)
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return;
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ClassDB::register_class<GoL>();
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});
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init.register_terminator([](ModuleInitializationLevel /*p_level*/) {
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// no-op
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});
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init.set_minimum_library_initialization_level(
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MODULE_INITIALIZATION_LEVEL_SCENE);
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return init.init();
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}
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