From 495303a5202f37c3d4d0aa023ce68a3e50db437b Mon Sep 17 00:00:00 2001
From: Wuzzy <almikes@aol.com>
Date: Mon, 16 Jan 2017 11:36:30 +0100
Subject: [PATCH] Add playerplus variant (suffocation + cactus dmg)

---
 API.md                          |   7 ++
 mods/playerplus/README.md       |  28 +++++++
 mods/playerplus/depends.txt     |   2 +
 mods/playerplus/description.txt |   1 +
 mods/playerplus/init.lua        | 134 ++++++++++++++++++++++++++++++++
 mods/playerplus/license.txt     |  21 +++++
 6 files changed, 193 insertions(+)
 create mode 100644 mods/playerplus/README.md
 create mode 100644 mods/playerplus/depends.txt
 create mode 100644 mods/playerplus/description.txt
 create mode 100644 mods/playerplus/init.lua
 create mode 100644 mods/playerplus/license.txt

diff --git a/API.md b/API.md
index 4335a1cac..fadd8a045 100644
--- a/API.md
+++ b/API.md
@@ -15,6 +15,13 @@ This section explains all the used groups in this subgame.
 * `soil_sapling=2`: Soil for saplings. Intended to be natural soil. All saplings will grow on this
 * `soil_sapling=1`: Artificial soil (such as farmland) for saplings. Some saplings will not grow on this
 * `soil_sugarcane=1`: Sugar canes will grow on this near water
+* `disable_suffocation=1`: Disables suffocation for full solid cubes (1)
+
+### Footnotes
+
+1. Normally, all walkable blocks with the default 1×1×1 cube as a collision box (e.g. sand,
+   gravel, stone, but not fences) will damage the players while their head is inside. This
+   is called “suffocation”. Setting this group disables this behaviour
 
 ### Groups (mostly) used for crafting recipes
 
diff --git a/mods/playerplus/README.md b/mods/playerplus/README.md
new file mode 100644
index 000000000..5a077fc79
--- /dev/null
+++ b/mods/playerplus/README.md
@@ -0,0 +1,28 @@
+# PlayerPlus mod for MineClone 2
+
+## Features
+
+- Hurt players touching cacti (0.5 hearts / 0.5s)
+- Suffocation: Hurt players who have their head inside a solid block (0.5 hearts / 0.5s)
+
+Suffocation *not* dealt to player with the `noclip` privilege.
+
+## Notes
+This mod is based on PlayerPlus [`playerplus`] by TenPlus1. It behaves a bit
+differently than the original, but the API is fully compatible.
+
+## API
+
+Every half second the mod checks which node the player is standing on, which
+node is at foot and head level and stores inside a global table to be used by mods:
+
+- `playerplus[name].nod_stand`
+- `playerplus[name].nod_foot`
+- `playerplus[name].nod_head`
+
+Setting the group `disable_suffocation=1` disables suffocation for nodes which
+would otherwise deal suffocation damage.
+
+## License
+WTFPL.
+
diff --git a/mods/playerplus/depends.txt b/mods/playerplus/depends.txt
new file mode 100644
index 000000000..c12cc51ba
--- /dev/null
+++ b/mods/playerplus/depends.txt
@@ -0,0 +1,2 @@
+default
+3d_armor?
diff --git a/mods/playerplus/description.txt b/mods/playerplus/description.txt
new file mode 100644
index 000000000..c1c9097f3
--- /dev/null
+++ b/mods/playerplus/description.txt
@@ -0,0 +1 @@
+Hurts players touching a cactus and when with the head inside solid blocks.
diff --git a/mods/playerplus/init.lua b/mods/playerplus/init.lua
new file mode 100644
index 000000000..568388091
--- /dev/null
+++ b/mods/playerplus/init.lua
@@ -0,0 +1,134 @@
+--[[
+	PlayerPlus by TenPlus1
+]]
+
+playerplus = {}
+
+-- get node but use fallback for nil or unknown
+local function node_ok(pos, fallback)
+
+	fallback = fallback or "air"
+
+	local node = minetest.get_node_or_nil(pos)
+
+	if not node then
+		return fallback
+	end
+
+	if minetest.registered_nodes[node.name] then
+		return node.name
+	end
+
+	return fallback
+end
+
+local armor_mod = minetest.get_modpath("3d_armor")
+local def = {}
+local time = 0
+
+minetest.register_globalstep(function(dtime)
+
+	time = time + dtime
+
+	-- every 0.5 seconds
+	if time < 0.5 then
+		return
+	end
+
+	-- reset time for next check
+	-- FIXME: Make sure a regular check interval applies
+	time = 0
+
+	-- check players
+	for _,player in pairs(minetest.get_connected_players()) do
+
+		-- who am I?
+		local name = player:get_player_name()
+
+		-- where am I?
+		local pos = player:getpos()
+
+		-- what is around me?
+		pos.y = pos.y - 0.1 -- standing on
+		playerplus[name].nod_stand = node_ok(pos)
+
+		pos.y = pos.y + 1.5 -- head level
+		playerplus[name].nod_head = node_ok(pos)
+	
+		pos.y = pos.y - 1.2 -- feet level
+		playerplus[name].nod_feet = node_ok(pos)
+
+		pos.y = pos.y - 0.2 -- reset pos
+
+		-- set defaults
+		def.speed = 1
+		def.jump = 1
+		def.gravity = 1
+
+		-- is 3d_armor mod active? if so make armor physics default
+		if armor_mod and armor and armor.def then
+			-- get player physics from armor
+			def.speed = armor.def[name].speed or 1
+			def.jump = armor.def[name].jump or 1
+			def.gravity = armor.def[name].gravity or 1
+		end
+
+		-- standing on soul sand? if so walk slower
+--		if playerplus[name].nod_stand == "mcl_nether:soul_sand" then
+			-- TODO: Fix walk speed
+--			def.speed = def.speed - 0.4
+--		end
+
+		-- set player physics
+		-- TODO: Resolve conflict
+		player:set_physics_override(def.speed, def.jump, def.gravity)
+
+		-- Is player suffocating inside node? (Only for solid full cube type nodes without damage
+		-- and without group disable_suffocation=1.)
+		local ndef = minetest.registered_nodes[playerplus[name].nod_head]
+
+		if (ndef.walkable == nil or ndef.walkable == true)
+		and (ndef.drowning == nil or ndef.drowning == 0)
+		and (ndef.damage_per_second == nil or ndef.damage_per_second <= 0)
+		and (ndef.collision_box == nil or ndef.collision_box.type == "regular")
+		and (ndef.node_box == nil or ndef.node_box.type == "regular")
+		and (ndef.groups.disable_suffocation ~= 1)
+		-- Check privilege, too
+		and (not minetest.check_player_privs(name, {noclip = true})) then
+			if player:get_hp() > 0 then
+				player:set_hp(player:get_hp() - 1)
+			end
+		end
+
+		-- am I near a cactus?
+		local near = minetest.find_node_near(pos, 1, "default:cactus")
+
+		if near then
+			-- am I touching the cactus? if so it hurts
+			for _,object in pairs(minetest.get_objects_inside_radius(near, 1.1)) do
+				if object:get_hp() > 0 then
+					object:set_hp(object:get_hp() - 1)
+				end
+			end
+
+		end
+
+	end
+
+end)
+
+-- set to blank on join (for 3rd party mods)
+minetest.register_on_joinplayer(function(player)
+	local name = player:get_player_name()
+
+	playerplus[name] = {}
+	playerplus[name].nod_head = ""
+	playerplus[name].nod_feet = ""
+	playerplus[name].nod_stand = ""
+end)
+
+-- clear when player leaves
+minetest.register_on_leaveplayer(function(player)
+
+	playerplus[ player:get_player_name() ] = nil
+end)
diff --git a/mods/playerplus/license.txt b/mods/playerplus/license.txt
new file mode 100644
index 000000000..fec6f6aa5
--- /dev/null
+++ b/mods/playerplus/license.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 TenPlus1
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.