Improve(?) wildcard rules

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "third/tracy"]
+	path = third/tracy
+	url = https://github.com/wolfpld/tracy.git

CMakeLists.txt

@@ -22,6 +22,16 @@ set_target_properties(sand PROPERTIES
   CXX_STANDARD_REQUIRED ON
 )
 
+if (EXISTS third/tracy/CMakeLists.txt)
+  option(TRACY_ENABLE "Enable Tracy" ON)
+  set(TRACY_STATIC OFF)
+  set(TRACY_ON_DEMAND ON)
+  add_subdirectory(third/tracy)
+  target_link_libraries(sand PUBLIC Tracy::TracyClient)
+else()
+  target_compile_definitions(sand PUBLIC FrameMark ZoneScoped)
+endif()
+
 find_package(SDL3 CONFIG REQUIRED)
 
 add_executable(sandtest

include/sand.h

@@ -2,6 +2,7 @@
 #define SAND_H
 
 #include <cstdint>
+#include <functional>
 #include <string>
 #include <unordered_map>
 #include <vector>
@@ -22,6 +23,8 @@ class TypeBuilder
   friend RulesBuilder;
 
 public:
+  TypeBuilder();
+
   TypeBuilder& add_type(const std::string& name);
   TypeBuilder& add_type(const std::string& name,
                         const std::string& default_result);
@@ -62,7 +65,7 @@ class Rule
   friend RulesBuilder;
 
 public:
-  using match_fn = bool (*)(const std::string& name);
+  using match_fn = std::function<bool(const std::string&)>;
 
   ~Rule();
 
@@ -98,6 +101,10 @@ private:
   Sand(const RulesBuilder& builder, uint16_t width, uint16_t height,
        const std::string& initial);
 
+  uint16_t apply_rule(uint16_t tile, unsigned __int128 key) const;
+
+  static unsigned __int128 apply_mask(unsigned __int128 key, uint8_t mask);
+
   uint16_t width;
   uint16_t height;
   type_map types;

src/main.cpp

@@ -6,47 +6,109 @@
 #include <SDL3/SDL_timer.h>
 #include <SDL3/SDL_video.h>
 #include <sand.h>
+#include <tracy/Tracy.hpp>
 
-constexpr uint16_t WIDTH = 256;
+constexpr uint16_t WIDTH = 128;
-constexpr uint16_t HEIGHT = 256;
+constexpr uint16_t HEIGHT = 128;
 
 constexpr int WINDOW_WIDTH = 1024;
 constexpr int WINDOW_HEIGHT = 1024;
 
-uint8_t lookup[][3]
+struct color
-  = { { 0, 0, 0 }, { 50, 0, 0 }, { 100, 100, 100 }, { 100, 100, 100 } };
+{
+  uint8_t c[3];
+};
+
+color lookup_color(uint16_t id)
+{
+  if (id == 0)
+  {
+    return { 0, 0, 0 };
+  }
+  else if (id == 1)
+  {
+    return { 150, 150, 255 };
+  }
+  else
+  {
+    color c;
+    c.c[0] = 257 - id;
+    c.c[1] = 257 - id;
+    c.c[2] = 257 - id;
+    return c;
+  }
+}
 
 int main(int argc, char** argv)
 {
-  auto rb = sand::TypeBuilder()
+  auto tb = sand::TypeBuilder().add_type("air");
-              .add_type("offgrid")
-              .add_type("air")
-              .add_type("stone1", "stone2")
-              .add_type("stone2", "stone1")
-              .finish();
 
-  rb.add_rule("air", "stone2")
+  for (int i = 0; i < 255; i++)
-    .top_middle([](const auto& t) { return t == "stone1"; });
+  {
-  rb.add_rule("air", "stone1")
+    tb.add_type("stone" + std::to_string(i), "stone" + std::to_string(i + 1));
-    .top_middle([](const auto& t) { return t == "stone2"; });
+  }
-  rb.add_rule("air", "stone2")
-    .top_right([](const auto& t) { return t == "stone1"; })
-    .middle_right([](const auto& t) { return t != "air"; });
-  rb.add_rule("air", "stone1")
-    .top_left([](const auto& t) { return t == "stone2"; })
-    .middle_left([](const auto& t) { return t != "air"; });
 
-  rb.add_rule("stone1", "air")
+  auto rb = tb.finish();
-    .bottom_middle([](const auto& t) { return t == "air"; });
-  rb.add_rule("stone1", "air")
-    .bottom_left([](const auto& t) { return t == "air"; })
-    .bottom_middle([](const auto& t) { return t != "air"; });
 
-  rb.add_rule("stone2", "air")
+  rb.add_rule("air", "stone0")
-    .bottom_middle([](const auto& t) { return t == "air"; });
+    .bottom_middle([](const std::string& t) { return t == "offgrid"; })
-  rb.add_rule("stone2", "air")
+    .top_middle([](const std::string& t) { return t == "air"; });
-    .bottom_right([](const auto& t) { return t == "air"; })
+
-    .bottom_middle([](const auto& t) { return t != "air"; });
+  for (int i = 0; i < 128; i++)
+  {
+    auto ar = rb.add_rule("air", "stone" + std::to_string(i + 1));
+    auto afn
+      = [i](const std::string& t) { return t == "stone" + std::to_string(i); };
+
+    auto sr = rb.add_rule("stone" + std::to_string(i), "air");
+    auto sfn = [](const std::string& t) { return t == "air"; };
+
+    switch (i % 3)
+    {
+    case 0:
+      ar.bottom_left(afn);
+      sr.top_right(sfn);
+      break;
+
+    case 1:
+      ar.bottom_middle(afn);
+      sr.top_middle(sfn);
+      break;
+
+    case 2:
+      ar.bottom_right(afn);
+      sr.top_left(sfn);
+      break;
+    }
+  }
+
+  for (int i = 128; i < 255; i++)
+  {
+    auto ar = rb.add_rule("air", "stone" + std::to_string(i + 1));
+    auto afn
+      = [i](const std::string& t) { return t == "stone" + std::to_string(i); };
+
+    auto sr = rb.add_rule("stone" + std::to_string(i), "air");
+    auto sfn = [](const std::string& t) { return t == "air"; };
+
+    switch (i % 3)
+    {
+    case 0:
+      ar.top_left(afn);
+      sr.bottom_right(sfn);
+      break;
+
+    case 1:
+      ar.top_middle(afn);
+      sr.bottom_middle(sfn);
+      break;
+
+    case 2:
+      ar.top_right(afn);
+      sr.bottom_left(sfn);
+      break;
+    }
+  }
 
   auto s = rb.build(WIDTH, HEIGHT, "air");
 
@@ -77,8 +139,6 @@ int main(int argc, char** argv)
 
     float x, y;
     int state;
-    if (time > 1 / 1000.0f)
-    {
     time = 0;
     s.update();
 
@@ -89,8 +149,7 @@ int main(int argc, char** argv)
 
       if (ix >= 0 && ix < WIDTH && iy >= 0 && iy < HEIGHT)
       {
-          s.set(ix, iy, state == 1 ? "stone1" : "stone2");
+        s.set(ix, iy, "stone0");
-        }
       }
     }
 
@@ -100,13 +159,15 @@ int main(int argc, char** argv)
       for (int j = 0; j < HEIGHT; j++)
       {
         memcpy(&static_cast<uint8_t*>(surface->pixels)[3 * (i + j * WIDTH)],
-               lookup[s.get(i, j)], 3);
+               lookup_color(s.get(i, j)).c, 3);
       }
     }
     SDL_UnlockSurface(surface);
     SDL_BlitSurfaceScaled(surface, nullptr, SDL_GetWindowSurface(window),
                           nullptr, SDL_SCALEMODE_NEAREST);
     SDL_UpdateWindowSurface(window);
+
+    FrameMark;
   }
 
   SDL_DestroySurface(surface);

src/sand.cpp

@@ -1,40 +1,59 @@
 #include "sand.h"
 
 #include <algorithm>
+#include <compare>
 #include <cstdint>
+#include <tracy/Tracy.hpp>
 
 using namespace sand;
 
 namespace
 {
 
+constexpr uint16_t OFFGRID_VALUE = 0;
+
 template <typename T>
-T& binary_search(T element, T* elements, size_t begin, size_t end,
+int binary_search(T element, const T* elements, size_t begin, size_t end,
-                 auto (*fn)(T, T)->bool)
+                  auto (*fn)(T, T)->std::strong_ordering)
 {
   if (end - begin == 1)
   {
-    return elements[begin];
+    if (fn(element, elements[begin]) == std::strong_ordering::equal)
+    {
+      return begin;
+    }
+    else
+    {
+
+      return -1;
+    }
   }
 
   size_t index = begin + (end - begin) / 2;
 
-  if (!fn(element, elements[index]) && !fn(elements[index], element))
+  auto comparison_result = fn(element, elements[index]);
-  {
+
-    return elements[index];
+  if (comparison_result == std::strong_ordering::less)
-  }
-  else if (fn(element, elements[index]))
-  {
-    return binary_search<T>(element, elements, index, end, fn);
-  }
-  else
   {
     return binary_search<T>(element, elements, begin, index, fn);
   }
+
+  if (comparison_result == std::strong_ordering::greater)
+  {
+    return binary_search<T>(element, elements, index, end, fn);
+  }
+
+  return index;
 }
 
 } // namespace
 
+TypeBuilder::TypeBuilder() :
+  next_type_id(OFFGRID_VALUE)
+{
+  add_type("offgrid");
+}
+
 TypeBuilder& TypeBuilder::add_type(const std::string& name)
 {
   if (!types.contains(name))
@@ -126,28 +145,84 @@ void RulesBuilder::finish_rule(const Rule& rule)
                                 {
                                   unsigned __int128 neighbors = 0;
 
+                                  if (rule.matches[0])
+                                  {
                                     neighbors += tl_type.id;
+                                  }
+                                  else
+                                  {
+                                    neighbors += 0xFFFF;
+                                  }
                                   neighbors <<= 16;
 
+                                  if (rule.matches[1])
+                                  {
                                     neighbors += tm_type.id;
+                                  }
+                                  else
+                                  {
+                                    neighbors += 0xFFFF;
+                                  }
                                   neighbors <<= 16;
 
+                                  if (rule.matches[2])
+                                  {
                                     neighbors += tr_type.id;
+                                  }
+                                  else
+                                  {
+                                    neighbors += 0xFFFF;
+                                  }
                                   neighbors <<= 16;
 
+                                  if (rule.matches[3])
+                                  {
                                     neighbors += ml_type.id;
+                                  }
+                                  else
+                                  {
+                                    neighbors += 0xFFFF;
+                                  }
                                   neighbors <<= 16;
 
+                                  if (rule.matches[4])
+                                  {
                                     neighbors += mr_type.id;
+                                  }
+                                  else
+                                  {
+                                    neighbors += 0xFFFF;
+                                  }
                                   neighbors <<= 16;
 
+                                  if (rule.matches[5])
+                                  {
                                     neighbors += bl_type.id;
+                                  }
+                                  else
+                                  {
+                                    neighbors += 0xFFFF;
+                                  }
                                   neighbors <<= 16;
 
+                                  if (rule.matches[6])
+                                  {
                                     neighbors += bm_type.id;
+                                  }
+                                  else
+                                  {
+                                    neighbors += 0xFFFF;
+                                  }
                                   neighbors <<= 16;
 
+                                  if (rule.matches[7])
+                                  {
                                     neighbors += br_type.id;
+                                  }
+                                  else
+                                  {
+                                    neighbors += 0xFFFF;
+                                  }
 
                                   if (!rules.contains(rule.source))
                                   {
@@ -157,21 +232,61 @@ void RulesBuilder::finish_rule(const Rule& rule)
                                   rules[rule.source].push_back(
                                     { neighbors, rule.to });
                                 }
+
+                                if (!rule.matches[7])
+                                {
+                                  break;
                                 }
+                              } // bottom right
                             }
+
+                            if (!rule.matches[6])
+                            {
+                              break;
                             }
+                          } // bottom middle
                         }
+
+                        if (!rule.matches[5])
+                        {
+                          break;
                         }
+                      } // bottom left
                     }
+
+                    if (!rule.matches[4])
+                    {
+                      break;
                     }
+                  } // middle right
                 }
+
+                if (!rule.matches[3])
+                {
+                  break;
                 }
+              } // middle left
             }
+
+            if (!rule.matches[2])
+            {
+              break;
             }
+          } // top right
         }
+
+        if (!rule.matches[1])
+        {
+          break;
         }
+      } // top middle
     }
+
+    if (!rule.matches[0])
+    {
+      break;
     }
+  } // top left
 }
 
 Rule::~Rule() { builder.finish_rule(*this); }
@@ -253,6 +368,12 @@ Sand::Sand(const RulesBuilder& builder, uint16_t width, uint16_t height,
   {
     default_conversions[type.id] = type.default_result;
   }
+
+  int cnt = 0;
+  for (const auto& [key, elem] : rules)
+  {
+    cnt += elem.size();
+  }
 }
 
 void Sand::set(uint16_t x, uint16_t y, const std::string& type)
@@ -267,6 +388,8 @@ uint16_t Sand::get(uint16_t x, uint16_t y)
 
 void Sand::update()
 {
+  ZoneScoped;
+
   int n;
 #pragma omp parallel for private(n)
   for (n = 0; n < width * height; n++)
@@ -274,73 +397,133 @@ void Sand::update()
     int i = n % width;
     int j = n / height;
 
-    auto& current_rule = rules[get(i, j)];
-
     unsigned __int128 neighbors = 0;
     if (i > 0 && j > 0)
     {
       neighbors += get(i - 1, j - 1);
     }
+    else
+    {
+      neighbors += OFFGRID_VALUE;
+    }
     neighbors <<= 16;
 
     if (j > 0)
     {
       neighbors += get(i, j - 1);
     }
+    else
+    {
+      neighbors += OFFGRID_VALUE;
+    }
     neighbors <<= 16;
 
     if (i < width - 1 && j > 0)
     {
       neighbors += get(i + 1, j - 1);
     }
+    else
+    {
+      neighbors += OFFGRID_VALUE;
+    }
     neighbors <<= 16;
 
     if (i > 0)
     {
       neighbors += get(i - 1, j);
     }
+    else
+    {
+      neighbors += OFFGRID_VALUE;
+    }
     neighbors <<= 16;
 
     if (i < width - 1)
     {
       neighbors += get(i + 1, j);
     }
+    else
+    {
+      neighbors += OFFGRID_VALUE;
+    }
     neighbors <<= 16;
 
     if (i > 0 && j < height - 1)
     {
       neighbors += get(i - 1, j + 1);
     }
+    else
+    {
+      neighbors += OFFGRID_VALUE;
+    }
     neighbors <<= 16;
 
     if (j < height - 1)
     {
       neighbors += get(i, j + 1);
     }
+    else
+    {
+      neighbors += OFFGRID_VALUE;
+    }
     neighbors <<= 16;
 
     if (i < width - 1 && j < height - 1)
     {
       neighbors += get(i + 1, j + 1);
     }
-
+    else
-    uint16_t result = default_conversions[get(i, j)];
-    if (!current_rule.empty())
     {
-      std::pair<unsigned __int128, uint16_t> element = { neighbors, 0 };
+      neighbors += OFFGRID_VALUE;
-      bool (*fn)(decltype(element), decltype(element))
-        = [](decltype(element) a, decltype(element) b) -> bool
-      { return a.first > b.first; };
-      const auto& found = binary_search(element, current_rule.data(), 0,
-                                        current_rule.size(), fn);
-      if (found.first == neighbors)
-      {
-        result = found.second;
-      }
     }
 
-    elements[i + j * width + !iter * width * height] = result;
+    elements[i + j * width + !iter * width * height]
+      = apply_rule(get(i, j), neighbors);
   }
 
   iter = !iter;
 }
+
+uint16_t Sand::apply_rule(uint16_t tile, unsigned __int128 key) const
+{
+  if (rules.contains(tile))
+  {
+    auto& rules_for_tile = rules.at(tile);
+
+    if (!rules_for_tile.empty())
+    {
+      for (int mask = 0; mask < 256; mask++)
+      {
+        std::pair<unsigned __int128, uint16_t> element
+          = { apply_mask(key, mask), 0 };
+        std::strong_ordering (*fn)(decltype(element), decltype(element))
+          = [](auto a, auto b) { return a.first <=> b.first; };
+
+        auto found = binary_search(element, rules_for_tile.data(), 0,
+                                   rules_for_tile.size(), fn);
+        if (found >= 0)
+        {
+          return rules_for_tile[found].second;
+        }
+      }
+    }
+  }
+
+  return default_conversions.at(tile);
+}
+
+unsigned __int128 Sand::apply_mask(unsigned __int128 key, uint8_t mask)
+{
+  unsigned __int128 any = 0xFFFF;
+  for (int i = 0; i < 8; i++)
+  {
+    if (mask & 1)
+    {
+      key |= any;
+    }
+
+    mask >>= 1;
+    any <<= 16;
+  }
+  return key;
+}

third/tracy

@@ -0,0 +1 @@
+Subproject commit 25f09bee2cdb680d025d150188925e116fc1e8d4