From f7052943ec8ef4ddbde3e1bcf6b50487bd3cfa72 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Elias=20=C3=85str=C3=B6m?= <ryvnf@riseup.net>
Date: Sat, 1 May 2021 15:37:14 +0200
Subject: [PATCH] Fix rays not being cast in a specific direction

A bug was introduced in 679e2b1b which caused explosions to not cast
rays for environment destruction in the (+X, +Y, +Z) direction.  This
commit fixes that.
---
 mods/CORE/mcl_explosions/init.lua | 76 +++++++++++++++----------------
 1 file changed, 37 insertions(+), 39 deletions(-)

diff --git a/mods/CORE/mcl_explosions/init.lua b/mods/CORE/mcl_explosions/init.lua
index e59e3ea12..d3fb882ce 100644
--- a/mods/CORE/mcl_explosions/init.lua
+++ b/mods/CORE/mcl_explosions/init.lua
@@ -66,46 +66,44 @@ local function compute_sphere_rays(radius)
 	local rays = {}
 	local sphere = {}
 
-	for i=1, 2 do
+	local function add_ray(pos)
+		sphere[hash_node_position(pos)] = pos
+	end
+
+	for y = -radius, radius do
+		for z = -radius, radius do
+			for x = -radius, 0 do
+				local d = x * x + y * y + z * z
+				if d <= radius * radius then
+					add_ray(vector.new(x, y, z))
+					add_ray(vector.new(-x, y, z))
+					break
+				end
+			end
+		end
+	end
+
+	for x = -radius, radius do
+		for z = -radius, radius do
+			for y = -radius, 0 do
+				local d = x * x + y * y + z * z
+				if d <= radius * radius then
+					add_ray(vector.new(x, y, z))
+					add_ray(vector.new(x, -y, z))
+					break
+				end
+			end
+		end
+	end
+
+	for x = -radius, radius do
 		for y = -radius, radius do
-			for z = -radius, radius do
-				for x = -radius, 0, 1 do
-					local d = x * x + y * y + z * z
-					if d <= radius * radius then
-						local pos = { x = x, y = y, z = z }
-						sphere[hash_node_position(pos)] = pos
-						break
-					end
-				end
-			end
-		end
-	end
-
-	for i=1,2 do
-		for x = -radius, radius do
-			for z = -radius, radius do
-				for y = -radius, 0, 1 do
-					local d = x * x + y * y + z * z
-					if d <= radius * radius then
-						local pos = { x = x, y = y, z = z }
-						sphere[hash_node_position(pos)] = pos
-						break
-					end
-				end
-			end
-		end
-	end
-
-	for i=1,2 do
-		for x = -radius, radius do
-			for y = -radius, radius do
-				for z = -radius, 0, 1 do
-					local d = x * x + y * y + z * z
-					if d <= radius * radius then
-						local pos = { x = x, y = y, z = z }
-						sphere[hash_node_position(pos)] = pos
-						break
-					end
+			for z = -radius, 0 do
+				local d = x * x + y * y + z * z
+				if d <= radius * radius then
+					add_ray(vector.new(x, y, z))
+					add_ray(vector.new(x, y, -z))
+					break
 				end
 			end
 		end