Rename mcl_playerphysics to playerphysics

mods/PLAYER/playerphysics/init.lua

@@ -0,0 +1,43 @@
+playerphysics = {}
+
+local function calculate_physic_product(player, physic)
+	local a = minetest.deserialize(player:get_attribute("playerphysics:physics"))
+	local product = 1
+	if a == nil or a[physic] == nil then
+		return product
+	end
+	local factors = a[physic]
+	if type(factors) == "table" then
+		for id, factor in pairs(factors) do
+			product = product * factor
+		end
+	end
+	return product
+end
+
+function playerphysics.add_physics_factor(player, physic, id, value)
+	local a = minetest.deserialize(player:get_attribute("playerphysics:physics"))
+	if a == nil then
+		a = { [physic] = { [id] = value } }
+	elseif a[physic] == nil then
+		a[physic] = { [id] = value }
+	else
+		a[physic][id] = value
+	end
+	player:set_attribute("playerphysics:physics", minetest.serialize(a))
+	local raw_value = calculate_physic_product(player, physic)
+	player:set_physics_override({[physic] = raw_value})
+end
+
+function playerphysics.remove_physics_factor(player, physic, id)
+	local a = minetest.deserialize(player:get_attribute("playerphysics:physics"))
+	if a == nil or a[physic] == nil then
+		-- Nothing to remove
+		return
+	else
+		a[physic][id] = nil
+	end
+	player:set_attribute("playerphysics:physics", minetest.serialize(a))
+	local raw_value = calculate_physic_product(player, physic)
+	player:set_physics_override({[physic] = raw_value})
+end