From e0e64dc6b96561d41cb48c740c8d47156ab7897d Mon Sep 17 00:00:00 2001
From: Starbeamrainbowlabs <sbrl@starbeamrainbowlabs.com>
Date: Sun, 20 Sep 2020 18:03:29 +0100
Subject: [PATCH] Start ellipseapply, but it isn't  finished

---
 worldeditadditions/lib/ellipseapply.lua | 53 +++++++++++++++++++++++++
 worldeditadditions/lib/ellipsoid.lua    |  7 +++-
 2 files changed, 58 insertions(+), 2 deletions(-)
 create mode 100644 worldeditadditions/lib/ellipseapply.lua

diff --git a/worldeditadditions/lib/ellipseapply.lua b/worldeditadditions/lib/ellipseapply.lua
new file mode 100644
index 0000000..5aeadf3
--- /dev/null
+++ b/worldeditadditions/lib/ellipseapply.lua
@@ -0,0 +1,53 @@
+-- ███████ ██      ██      ██ ██████  ███████ ███████  █████  ██████  ██████  ██   ██    ██
+-- ██      ██      ██      ██ ██   ██ ██      ██      ██   ██ ██   ██ ██   ██ ██    ██  ██
+-- █████   ██      ██      ██ ██████  ███████ █████   ███████ ██████  ██████  ██     ████
+-- ██      ██      ██      ██ ██           ██ ██      ██   ██ ██      ██      ██      ██
+-- ███████ ███████ ███████ ██ ██      ███████ ███████ ██   ██ ██      ██      ███████ ██
+
+--- Similar to cubeapply, except that it takes 2 positions and only keeps an ellipsoid-shaped area defined by the boundaries of the defined region.
+-- Takes a backup copy of the defined region, runs the given function, and then
+-- restores the bits around the edge that aren't inside the largest ellipsoid that will fit inside the defined region.
+-- @param	{Position}	pos1	The 1st position defining the region boundary
+-- @param	{Position}	pos2	The 2nd positioon defining the region boundary 
+-- @param	{Function}	func	The function to call that performs the action in question. It is expected that the given function will accept no arguments.
+function worldeditadditions.ellipseapply(pos1, pos2, func)
+	pos1, pos2 = worldedit.sort_pos(pos1, pos2)
+	-- pos2 will always have the highest co-ordinates now
+	
+	-- Fetch the nodes in the specified area
+	local manip_before, area_before = worldedit.manip_helpers.init(pos1, pos2)
+	local data_before = manip:get_data()
+	
+	func()
+	
+	local manip_after, area_after = worldedit.manip_helpers.init(pos1, pos2)
+	local data_after = manip:get_data()
+	
+	local radius = {
+		x = (pos2.x - pos1.x) / 2,
+		y = (pos2.y - pos1.y) / 2,
+		z = (pos2.z - pos1.z) / 2
+	}
+	local e_centre = {
+		x = pos2.x - radius.x,
+		y = pos2.y - radius.y,
+		z = pos2.z - radius.z
+	}
+	
+	for z = pos2.z, pos1.z, -1 do
+		for y = pos2.y, pos1.y, -1 do
+			for x = pos2.x, pos1.x, -1 do
+				local comp_x = (x - e_centre.x) / radius.x
+				local comp_y = (y - e_centre.y) / radius.y
+				local comp_z = (z - e_centre.z) / radius.z
+				
+				-- TODO finish this
+			end
+		end
+	end
+	
+	-- Save the modified nodes back to disk & return
+	-- No need to save - this function doesn't actually change anything
+	worldedit.manip_helpers.finish(manip_after, data_after)
+	
+end
diff --git a/worldeditadditions/lib/ellipsoid.lua b/worldeditadditions/lib/ellipsoid.lua
index 3577cfc..d63fdb8 100644
--- a/worldeditadditions/lib/ellipsoid.lua
+++ b/worldeditadditions/lib/ellipsoid.lua
@@ -1,5 +1,8 @@
---- Overlap command. Places a specified node on top of 
--- @module worldeditadditions.overlay
+-- ███████ ██      ██      ██ ██████  ███████ ███████
+-- ██      ██      ██      ██ ██   ██ ██      ██
+-- █████   ██      ██      ██ ██████  ███████ █████
+-- ██      ██      ██      ██ ██           ██ ██
+-- ███████ ███████ ███████ ██ ██      ███████ ███████
 
 function worldeditadditions.ellipsoid(position, radius, target_node, hollow)
 	-- position = { x, y, z }