From a66d5449f25fd01eed5d5beb19031077c6a07990 Mon Sep 17 00:00:00 2001
From: oilboi <47129783+oilboi@users.noreply.github.com>
Date: Sun, 19 Apr 2020 08:06:27 -0400
Subject: [PATCH] Add in much better nether teleport effect

---
 nether.lua | 45 ++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 38 insertions(+), 7 deletions(-)

diff --git a/nether.lua b/nether.lua
index 43720f5..f5028f6 100644
--- a/nether.lua
+++ b/nether.lua
@@ -7,6 +7,8 @@ local nether_id = nil --the nether incoming
 local cool_off_timer = 0 --use this to stop players teleporting back and forth
 local init_sound = nil
 local teleport_sound = nil
+local opacity = 0
+
 minetest.register_globalstep(function(dtime)
 	if not minetest.localplayer or not minetest.camera then
 		return
@@ -25,31 +27,32 @@ minetest.register_globalstep(function(dtime)
 	local node = minetest.get_node_or_nil(pos)
 	
 	if node and node.name == "nether:portal" and cool_off_timer == 0 then
+		if init_sound == nil then
+			init_sound = minetest.sound_play("portal_initialize",{gain=0,pitch=math.random(70,90)/100})
+			minetest.sound_fade(init_sound, 0.34, 1)
+		end
 		if hud_bg_id == nil then
 			hud_bg_id = minetest.localplayer:hud_add({
 				hud_elem_type = "image", -- see HUD element types, default "text"
 				position = {x=0.5, y=0.5},
 				name = "",    -- default ""
 				scale = {x=-100, y=-100}, -- default {x=0,y=0}
-				text = "darkness.png",    -- default ""
+				text = "darkness.png^[opacity:"..opacity,    -- default ""
 			})
 			hud_id = minetest.localplayer:hud_add({
 				hud_elem_type = "image", -- see HUD element types, default "text"
 				position = {x=0.5, y=0.5},
 				name = "",    -- default ""
 				scale = {x=-1, y=-1}, -- default {x=0,y=0}
-				text = "nether_portal_gui.png",    -- default ""
+				text = "nether_portal_gui.png^[opacity:"..opacity,    -- default ""
 			})
 			nether_id = minetest.localplayer:hud_add({
 				hud_elem_type = "image", -- see HUD element types, default "text"
 				position = {x=0.5, y=0.5},
 				name = "",    -- default ""
 				scale = {x=0, y=0}, -- default {x=0,y=0}
-				text = "darkness.png",    -- default ""
+				text = "darkness.png^[opacity:"..opacity,    -- default ""
 			})
-			init_sound = minetest.sound_play("portal_initialize",{gain=0,pitch=math.random(70,90)/100})
-			minetest.sound_fade(init_sound, 0.34, 1)
-			
 		else
 			--make the hud zoom in
 			local scale = minetest.localplayer:hud_get(hud_id).scale.x
@@ -58,7 +61,13 @@ minetest.register_globalstep(function(dtime)
 			elseif scale < -100 then	
 				scale = -100
 			end
+			opacity = -scale * 2.55
 			minetest.localplayer:hud_change(hud_id, "scale", {x=scale,y=scale})
+			minetest.localplayer:hud_change(hud_id, "text", "nether_portal_gui.png^[opacity:"..opacity)
+			
+			minetest.localplayer:hud_change(hud_bg_id, "text", "darkness.png^[opacity:"..opacity)
+			
+			minetest.localplayer:hud_change(nether_id, "text", "darkness.png^[opacity:"..opacity)
 		end
 	elseif hud_bg_id and hud_id then
 		--play spooky sounds
@@ -78,8 +87,15 @@ minetest.register_globalstep(function(dtime)
 			elseif scale > -1 then	
 				scale = -1
 			end
+			opacity = -scale * 2.55
 			minetest.localplayer:hud_change(hud_id, "scale", {x=scale,y=scale})
 			
+			minetest.localplayer:hud_change(hud_id, "text", "nether_portal_gui.png^[opacity:"..opacity)
+			
+			minetest.localplayer:hud_change(hud_bg_id, "text", "darkness.png^[opacity:"..opacity)
+			
+			minetest.localplayer:hud_change(nether_id, "text", "darkness.png^[opacity:"..opacity)
+			
 			if scale == -1 then
 				minetest.localplayer:hud_remove(hud_bg_id)
 				minetest.localplayer:hud_remove(hud_id)
@@ -87,9 +103,10 @@ minetest.register_globalstep(function(dtime)
 				nether_id = nil
 				hud_bg_id = nil
 				hud_id = nil
+				opacity = 0
 			end
 		--teleport complete animation
-		else
+		elseif cool_off_timer > 0 then
 			local scale = minetest.localplayer:hud_get(nether_id).scale.x
 			if scale == 0 then scale = -1 end
 			if scale > -100 then
@@ -97,7 +114,18 @@ minetest.register_globalstep(function(dtime)
 			elseif scale < -100 then	
 				scale = -100
 			end
+			
+			opacity = (100+scale) * 2.55
 			minetest.localplayer:hud_change(nether_id, "scale", {x=scale,y=scale})
+			
+			
+			minetest.localplayer:hud_change(hud_id, "text", "nether_portal_gui.png^[opacity:"..opacity)
+			
+			minetest.localplayer:hud_change(hud_bg_id, "text", "darkness.png^[opacity:"..opacity)
+			
+			minetest.localplayer:hud_change(nether_id, "text", "darkness.png^[opacity:"..opacity)
+			
+			
 			if scale == -100 then
 				minetest.localplayer:hud_remove(hud_bg_id)
 				minetest.localplayer:hud_remove(hud_id)
@@ -105,7 +133,10 @@ minetest.register_globalstep(function(dtime)
 				nether_id = nil
 				hud_bg_id = nil
 				hud_id = nil
+				opacity = 0
 			end
+		else
+			init_sound = nil
 		end
 	elseif hud_bg_id and hud_id then
 		minetest.localplayer:hud_remove(hud_bg_id)
-- 
2.44.0