Lighting now uses pathing to determine where it can go, but _distance_ to determin strength. Looks way better.

lights.cpp

@@ -5,29 +5,10 @@
 using std::vector;
 
 namespace lighting {
-
-  void LightRender::render_circle_light(LightSource source, Point at, PointList &has_light) {
-    for(matrix::circle it{$lightmap, at, source.radius}; it.next();) {
-      for(int x = it.left; x < it.right; x++) {
-        $lightmap[it.y][x] = light_level(source.strength, x, it.y);
-        has_light.push_back({(size_t)x, (size_t)it.y});
-      }
-    }
-  }
-
-  void LightRender::render_compass_light(LightSource source, Point at, PointList &has_light) {
-    for(matrix::compass it{$lightmap, at.x, at.y}; it.next();) {
-      if($paths.$paths[it.y][it.x] != WALL_PATH_LIMIT) {
-        $lightmap[it.y][it.x] = light_level(source.strength, it.x, it.y);
-        has_light.push_back({it.x, it.y});
-      }
-    }
-  }
-
   void LightRender::render_square_light(LightSource source, Point at, PointList &has_light) {
     for(matrix::in_box it{$lightmap, at.x, at.y, (size_t)floor(source.radius)}; it.next();) {
       if($paths.$paths[it.y][it.x] != WALL_PATH_LIMIT) {
-        $lightmap[it.y][it.x] = light_level(source.strength, it.x, it.y);
+        $lightmap[it.y][it.x] = light_level(source.strength, it.distance(), it.x, it.y);
         has_light.push_back({it.x, it.y});
       }
     }
@@ -38,26 +19,22 @@ namespace lighting {
     clear_light_target(at);
     PointList has_light;
 
-    if(source.radius < 1.5f) {
-      render_compass_light(source, at, has_light);
-    } else if(source.radius < 2.0f) {
-      render_square_light(source, at, has_light);
-    } else {
-      render_circle_light(source, at, has_light);
-    }
+    render_square_light(source, at, has_light);
 
     const int wall_light = source.strength + WALL_LIGHT_LEVEL;
     for(auto point : has_light) {
       for(matrix::compass it{$lightmap, point.x, point.y}; it.next();) {
         if($paths.$paths[it.y][it.x] == WALL_PATH_LIMIT) {
-            $lightmap[it.y][it.x] = light_level(wall_light, point.x, point.y);
+            // BUG: include the distance in the list of walls to light
+            // so that they will be closer to the light level at that point
+            $lightmap[it.y][it.x] = light_level(wall_light, 1.0f, point.x, point.y);
         }
       }
     }
   }
 
-  int LightRender::light_level(int level, size_t x, size_t y) {
-    size_t at = level + $paths.$paths[y][x];
+  int LightRender::light_level(int level, float distance, size_t x, size_t y) {
+    size_t at = level + ceil(distance);
     int cur_level = $lightmap[y][x];
     int new_level = at < lighting::LEVELS.size() ? lighting::LEVELS[at] : lighting::MIN;
     return cur_level < new_level ? new_level : cur_level;

lights.hpp

@@ -49,7 +49,7 @@ namespace lighting {
     void clear_light_target(const Point &at);
     void path_light(Matrix &walls);
     void light_box(LightSource source, Point from, Point &min_out, Point &max_out);
-    int light_level(int level, size_t x, size_t y);
+    int light_level(int level, float distance, size_t x, size_t y);
     void render_light(LightSource source, Point at);
     void render_square_light(LightSource source, Point at, PointList &has_light);
     void render_compass_light(LightSource source, Point at, PointList &has_light);

main.cpp

@@ -33,7 +33,7 @@ void configure_world(DinkyECS::World &world, Map &game_map) {
   world.set<Combat>(player.entity, {100, 10});
   world.set<Tile>(player.entity, {config.PLAYER_TILE});
   world.set<Inventory>(player.entity, {5});
-  world.set<LightSource>(player.entity, {6,2.1});
+  world.set<LightSource>(player.entity, {6,1.0});
 
   auto enemy = world.entity();
   world.set<Position>(enemy, {game_map.place_entity(1)});
@@ -55,7 +55,7 @@ void configure_world(DinkyECS::World &world, Map &game_map) {
 
   auto wall_torch = world.entity();
   world.set<Position>(wall_torch, {game_map.place_entity(4)});
-  world.set<LightSource>(wall_torch, {3,2.4});
+  world.set<LightSource>(wall_torch, {4,3});
   world.set<Tile>(wall_torch, {"☀"});
 }
 

matrix.cpp

@@ -53,9 +53,11 @@ namespace matrix {
     return at_end(y, height);
   }
 
-  in_box::in_box(Matrix &mat, size_t from_x, size_t from_y, size_t size) {
-    size_t h = mat.size();
-    size_t w = mat[0].size();
+  in_box::in_box(Matrix &mat, size_t at_x, size_t at_y, size_t size) :
+    from_x(at_x), from_y(at_y)
+  {
+    size_t h = matrix::height(mat);
+    size_t w = matrix::width(mat);
 
     // keeps it from going below zero
     // need extra -1 to compensate for the first next()
@@ -78,9 +80,17 @@ namespace matrix {
     // if x==0 then this moves it to min_x
     x = max(x, left);
     // and done
+
     return at_end(y, bottom);
   }
 
+  float in_box::distance() {
+    int dx = from_x - x;
+    int dy = from_y - y;
+
+    return sqrt((dx * dx) + (dy * dy));
+  }
+
   void in_box::dump() {
     println("BOX: x={},y={}; left={},right={}; top={},bottom={}",
         x, y, left, right, top, bottom);

matrix.hpp

@@ -37,6 +37,8 @@ namespace matrix {
   };
 
   struct in_box {
+    size_t from_x;
+    size_t from_y;
     size_t x = 0; // these are set in constructor
     size_t y = 0; // again, no fancy ~ trick needed
     size_t left = 0;
@@ -45,6 +47,7 @@ namespace matrix {
     size_t bottom = 0;
 
     in_box(Matrix &mat, size_t x, size_t y, size_t size);
+    float distance();
     bool next();
     void dump();
   };

systems.cpp

@@ -143,8 +143,8 @@ void System::collision(DinkyECS::World &world, Player &player) {
 
         world.send<Events::GUI>(Events::GUI::LOOT, entity, loot);
         inventory.gold += loot.amount;
-        light.strength = 4;
-        light.radius = 2.3;
+        light.strength = 5;
+        light.radius = 2;
         collider.remove(loot_pos.location);
       } else {
         println("UNKNOWN COLLISION TYPE {}", entity);

tests/lighting.cpp

@@ -10,38 +10,36 @@
 using namespace lighting;
 
 TEST_CASE("lighting a map works", "[lighting]") {
-  for(int i = 0; i < 5; i++) {
-    Map map(20+i,23+i);
-    WorldBuilder builder(map);
-    builder.generate();
+  Map map(20,23);
+  WorldBuilder builder(map);
+  builder.generate();
 
-    Point light1 = map.place_entity(0);
-    Point light2 = map.place_entity(1);
-    LightSource source1{7,1};
-    LightSource source2{3,2};
+  Point light1 = map.place_entity(0);
+  Point light2 = map.place_entity(1);
+  LightSource source1{0,2};
+  LightSource source2{1,3};
 
-    LightRender lr(map.width(), map.height());
+  LightRender lr(map.width(), map.height());
 
-    lr.reset_light();
+  lr.reset_light();
 
-    lr.set_light_target(light1);
-    lr.set_light_target(light2);
+  lr.set_light_target(light1);
+  lr.set_light_target(light2);
 
-    lr.path_light(map.walls());
+  lr.path_light(map.walls());
 
-    lr.render_light(source1, light1);
-    lr.render_light(source2, light2);
+  lr.render_light(source1, light1);
+  lr.render_light(source2, light2);
 
-    lr.clear_light_target(light1);
-    lr.clear_light_target(light2);
+  lr.clear_light_target(light1);
+  lr.clear_light_target(light2);
 
-    Matrix &lighting = lr.lighting();
+  Matrix &lighting = lr.lighting();
 
-    //matrix::dump("WALLS=====", map.walls());
-    //matrix::dump("LIGHT PATHS======", lr.$paths.$paths);
+  matrix::dump("WALLS=====", map.walls(), light1.x, light1.y);
+  matrix::dump("LIGHTING======", lighting, light1.x, light1.y);
 
-    // confirm light is set at least at and around the two points
-    REQUIRE(lighting[light1.y][light1.x] == lighting::LEVELS[source1.strength]);
-    REQUIRE(lighting[light2.y][light2.x] == lighting::LEVELS[source2.strength]);
-  }
+  // confirm light is set at least at and around the two points
+  REQUIRE(lighting[light1.y][light1.x] == lighting::LEVELS[source1.strength]);
+  REQUIRE(lighting[light2.y][light2.x] == lighting::LEVELS[source2.strength]);
 }

tests/matrix.cpp

@@ -101,6 +101,27 @@ TEST_CASE("thash matrix iterators", "[matrix]") {
   }
 }
 
+TEST_CASE("thrash box distance iterators", "[matrix:distance]") {
+  size_t width = Random::uniform<size_t>(10, 21);
+  size_t height = Random::uniform<size_t>(10, 25);
+
+  Matrix result(height, matrix::Row(width));
+  matrix::assign(result, 0);
+
+  size_t size = Random::uniform<int>(4, 10);
+
+  Point target{width/2, height/2};
+  matrix::in_box box{result, target.x, target.y, size};
+  while(box.next()) {
+    result[box.y][box.x] = box.distance();
+  }
+
+  matrix::dump(format("MAP {}x{} @ {},{}; BOX {}x{}; size: {}",
+        matrix::width(result), matrix::height(result),
+        target.x, target.y, box.right - box.left, box.bottom - box.top, size),
+        result, target.x, target.y);
+}
+
 TEST_CASE("thrash box iterators", "[matrix]") {
   for(int count = 0; count < 20; count++) {
     size_t width = Random::uniform<size_t>(1, 25);
@@ -250,7 +271,7 @@ TEST_CASE("prototype circle algorithm", "[matrix:circle]") {
         }
       }
 
-      matrix::dump(format("RESULT AFTER CIRCLE radius {}", radius), result, start.x, start.y);
+      // matrix::dump(format("RESULT AFTER CIRCLE radius {}", radius), result, start.x, start.y);
     }
   }
 }