Apply visibility bounds check fix to all chapters

It didn't occur to me that the bounds check problem occurred in nearly
every chapter after 5; this commit propagates that fix to every chapter.

Unfortunately, I have not read any further than chapter 5 yet, so I don't
know for certain that this issue even exists in later chapters. I
apologize in advance if this fix is inappropriate for the rest of the book.

Author: ddalcino

chapter-06-monsters/src/visibility_system.rs

@@ -18,7 +18,7 @@ impl<'a> System<'a> for VisibilitySystem {
             if viewshed.dirty {
                 viewshed.dirty = false;
                 viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
-                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width-1 && p.y >= 0 && p.y < map.height-1 );
+                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width && p.y >= 0 && p.y < map.height );
 
                 // If this is the player, reveal what they can see
                 let _p : Option<&Player> = player.get(ent);

chapter-07-damage/src/visibility_system.rs

@@ -18,7 +18,7 @@ impl<'a> System<'a> for VisibilitySystem {
             if viewshed.dirty {
                 viewshed.dirty = false;
                 viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
-                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width-1 && p.y >= 0 && p.y < map.height-1 );
+                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width && p.y >= 0 && p.y < map.height );
 
                 // If this is the player, reveal what they can see
                 let _p : Option<&Player> = player.get(ent);

chapter-08-ui/src/visibility_system.rs

@@ -18,7 +18,7 @@ impl<'a> System<'a> for VisibilitySystem {
             if viewshed.dirty {
                 viewshed.dirty = false;
                 viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
-                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width-1 && p.y >= 0 && p.y < map.height-1 );
+                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width && p.y >= 0 && p.y < map.height );
 
                 // If this is the player, reveal what they can see
                 let _p : Option<&Player> = player.get(ent);

chapter-09-items/src/visibility_system.rs

@@ -18,7 +18,7 @@ impl<'a> System<'a> for VisibilitySystem {
             if viewshed.dirty {
                 viewshed.dirty = false;
                 viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
-                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width-1 && p.y >= 0 && p.y < map.height-1 );
+                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width && p.y >= 0 && p.y < map.height );
 
                 // If this is the player, reveal what they can see
                 let _p : Option<&Player> = player.get(ent);

chapter-10-ranged/src/visibility_system.rs

@@ -18,7 +18,7 @@ impl<'a> System<'a> for VisibilitySystem {
             if viewshed.dirty {
                 viewshed.dirty = false;
                 viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
-                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width-1 && p.y >= 0 && p.y < map.height-1 );
+                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width && p.y >= 0 && p.y < map.height );
 
                 // If this is the player, reveal what they can see
                 let _p : Option<&Player> = player.get(ent);

chapter-11-loadsave/src/visibility_system.rs

@@ -18,7 +18,7 @@ impl<'a> System<'a> for VisibilitySystem {
             if viewshed.dirty {
                 viewshed.dirty = false;
                 viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
-                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width-1 && p.y >= 0 && p.y < map.height-1 );
+                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width && p.y >= 0 && p.y < map.height );
 
                 // If this is the player, reveal what they can see
                 let _p : Option<&Player> = player.get(ent);

chapter-12-delvingdeeper/src/visibility_system.rs

@@ -18,7 +18,7 @@ impl<'a> System<'a> for VisibilitySystem {
             if viewshed.dirty {
                 viewshed.dirty = false;
                 viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
-                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width-1 && p.y >= 0 && p.y < map.height-1 );
+                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width && p.y >= 0 && p.y < map.height );
 
                 // If this is the player, reveal what they can see
                 let _p : Option<&Player> = player.get(ent);

chapter-13-difficulty/src/visibility_system.rs

@@ -18,7 +18,7 @@ impl<'a> System<'a> for VisibilitySystem {
             if viewshed.dirty {
                 viewshed.dirty = false;
                 viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
-                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width-1 && p.y >= 0 && p.y < map.height-1 );
+                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width && p.y >= 0 && p.y < map.height );
 
                 // If this is the player, reveal what they can see
                 let _p : Option<&Player> = player.get(ent);

chapter-14-gear/src/visibility_system.rs

@@ -18,7 +18,7 @@ impl<'a> System<'a> for VisibilitySystem {
             if viewshed.dirty {
                 viewshed.dirty = false;
                 viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
-                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width-1 && p.y >= 0 && p.y < map.height-1 );
+                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width && p.y >= 0 && p.y < map.height );
 
                 // If this is the player, reveal what they can see
                 let _p : Option<&Player> = player.get(ent);

chapter-16-nicewalls/src/visibility_system.rs

@@ -18,7 +18,7 @@ impl<'a> System<'a> for VisibilitySystem {
             if viewshed.dirty {
                 viewshed.dirty = false;
                 viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
-                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width-1 && p.y >= 0 && p.y < map.height-1 );
+                viewshed.visible_tiles.retain(|p| p.x >= 0 && p.x < map.width && p.y >= 0 && p.y < map.height );
 
                 // If this is the player, reveal what they can see
                 let _p : Option<&Player> = player.get(ent);