From 547be19e68a4f1e72e903b688bbdf982baa1fa5f Mon Sep 17 00:00:00 2001
From: "Zed A. Shaw" <zed.shaw@gmail.com>
Date: Sun, 15 Dec 2024 19:54:16 -0500
Subject: [PATCH] Lighting now uses the new box iterator, although it'll be
 replaced soon by the flood or random iterator.

---
 lights.cpp | 35 ++++++-----------------------------
 1 file changed, 6 insertions(+), 29 deletions(-)

diff --git a/lights.cpp b/lights.cpp
index d5c3e68..769fceb 100644
--- a/lights.cpp
+++ b/lights.cpp
@@ -10,34 +10,19 @@ namespace lighting {
     clear_light_target(at);
     vector<Point> has_light;
 
-    matrix::in_box it{$lightmap, at.x, at.y, (size_t)source.distance};
-    light_box(source, at, min, max);
 
-    dbc::check(it.x+1 == min.x, "box min x different");
-    dbc::check(it.y == min.y, "box min y different");
-    dbc::check(it.right == max.x + 1, "box max.x/right different");
-    dbc::check(it.bottom == max.y + 1, "box max.y/bottom different");
-
-    while(it.next()) {
-      auto &light_row = $lightmap[it.y];
-      auto &path_row = $paths.$paths[it.y];
-
-      if(path_row[it.x] != WALL_PATH_LIMIT) {
-        light_row[it.x] = light_level(source.strength, it.x, it.y);
+    for(matrix::in_box it{$lightmap, at.x, at.y, (size_t)source.distance}; it.next();) {
+      if($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});
       }
     }
 
     const int wall_light = source.strength + WALL_LIGHT_LEVEL;
     for(auto point : has_light) {
-      for(int j = -1;point.y+j >= 0 && j <= 1 && point.y+j < $height; j++) {
-        auto &path_row = $paths.$paths[point.y+j];
-        auto &light_row = $lightmap[point.y+j];
-
-        for(int i = -1; point.x+i >= 0 && i <= 1 && point.x+i < $width; i++) {
-          if(path_row[point.x+i] == WALL_PATH_LIMIT) {
-            light_row[point.x+i] = light_level(wall_light, point.x, point.y);
-          }
+      for(matrix::in_box it{$lightmap, point.x, point.y, 1}; 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);
         }
       }
     }
@@ -68,12 +53,4 @@ namespace lighting {
   void LightRender::path_light(Matrix &walls) {
     $paths.compute_paths(walls);
   }
-
-  void LightRender::light_box(LightSource source, Point from, Point &min_out, Point &max_out) {
-    using std::min, std::max;
-    min_out.x = max(int(from.x), source.distance) - source.distance;
-    max_out.x = min(from.x + source.distance, $width - 1);
-    min_out.y = max(int(from.y), source.distance) - source.distance;
-    max_out.y = min(from.y + source.distance, $height - 1);
-  }
 }