-hangglider = {}
+-- Hangglider mod for Minetest
+-- Original code by Piezo_ (orderofthefourthwall@gmail.com)
+-- 2018-11-14
+
+-- Modifications by David G (kestral246@gmail.com)
+-- 2018-11-24
+-- For Minetest 5.x, glider's set_attach needs to be offset by 1 node
+-- Switch to alternate commented line below with correct offset.
+-- Additional tuning of parameters.
+-- Commented out debug hud display code, prefixed with "--debug:".
+
+-- 2018-11-22
+-- Give visual indication that hangglider is equiped.
+-- Display simple overlay with blurred struts when equiped.
+-- Issue: don't know how to disable overlay in third person view.
+-- Also Unequip hangglider when landing on water.
+-- Attempt to linearize parabolic flight path.
+-- Start gravity stronger, but gradually reduce it as descent velocity increases.
+-- Don't use airstopper when equipped from the ground (descent velocity is low).
+-- Slightly increase flight speed to 1.25.
+-- Unequip/equip cycling mid-flight should not fly farther than continuous flight.
+-- When equipping mid-air (descent velocity higher), use airstopper but increase descent slope afterwards.
+-- Create airbreak flag so all equips mid-flight use faster descent.
+-- Reset airbreak flag only when land (canExist goes false).
+-- Issue: it wouldn't reset if land in water, use fly, and launch from air, before I added test for water,
+-- not sure if there are other such cases.
+-- Temporarily add hud debug display to show descent velocity, gravity override, and airbreak flag.
+-- Still in process of tuning all the parameters.
+
+
+-- Modifications by Piezo_
+-- 2018-11-25
+-- hud overlay and debug can be enabled/disabled
+-- Added blender-rendered overlay for struts using the actual model.
+-- Reduced airbreak penalty severity
+-- gave glider limited durability.
+
+
+local HUD_Overlay = true --show glider struts as overlay on HUD
+local debug = false --show debug info in top-center of hud
+hangglider = {} --Make this global, so other mods can tell if hangglider exists.
hangglider.use = {}
+if HUD_Overlay then
+hangglider.id = {} -- hud id for displaying overlay with struts
+end
+if debug then hangglider.debug = {} end -- hud id for debug data
+hangglider.airbreak = {} -- true if falling fast when equip
minetest.register_entity("hangglider:airstopper", { --A one-instant entity that catches the player and slows them down.
hp_max = 3,
local player = self.object:get_attach("parent")
if player then
local pos = player:getpos()
- if hangglider.use[player:get_player_name()] then
- if minetest.registered_nodes[minetest.get_node(vector.new(pos.x, pos.y-0.5, pos.z)).name] then
- if not minetest.registered_nodes[minetest.get_node(vector.new(pos.x, pos.y-0.5, pos.z)).name].walkable then
+ local pname = player:get_player_name()
+ if hangglider.use[pname] then
+ local mrn_name = minetest.registered_nodes[minetest.get_node(vector.new(pos.x, pos.y-0.5, pos.z)).name]
+ if mrn_name then
+ if not (mrn_name.walkable or (mrn_name.drowning and mrn_name.drowning == 1)) then
canExist = true
- if player:get_player_velocity().y > -4.5 and player:get_physics_override().gravity < 0 then
- player:set_physics_override({
- gravity = 0.02,
- })
- elseif player:get_player_velocity().y < -5 and player:get_physics_override().gravity > 0 then
- player:set_physics_override({
- gravity = -0.02,
- })
+ local vel = player:get_player_velocity()
+ local grav = player:get_physics_override().gravity
+ if debug then player:hud_change(hangglider.debug[pname].id, "text", vel.y..', '..grav..', '..tostring(hangglider.airbreak[pname])) end
+ -- If airbreaking used, increase the descent progression to not give
+ -- mid-flight unequip/equip cycles a distance advantage.
+ if hangglider.airbreak[pname] then
+ if vel.y <= -4.0 then
+ grav = -0.2 --Extreme measures are needed, as sometimes speed will get a bit out of control
+ elseif vel.y <= -2.0 then
+ grav = -0.02
+ elseif vel.y <= -1.75 then
+ grav = 0.00125 -- *1
+ elseif vel.y <= -1.5 then
+ grav = 0.0025 -- *2
+ elseif vel.y <= -1.25 then
+ grav = 0.005 -- *2
+ elseif vel.y <= -1 then
+ grav = 0.015 -- *3
+ elseif vel.y <= -0.75 then
+ grav = 0.04 -- *4
+ elseif vel.y <= -0.5 then
+ grav = 0.08 -- *4
+ elseif vel.y <= -0.25 then
+ grav = 0.12 -- *3
+ elseif vel.y <= 0 then
+ grav = 0.3 -- *3
+ else -- vel.y > 0
+ grav = 0.75 -- *1.5
+ end
+ else -- normal descent progression
+ if vel.y <= -4.0 then
+ grav = -0.2
+ elseif vel.y <= -2.0 then
+ grav = -0.02
+ elseif vel.y <= -1.5 then
+ grav = 0.00125
+ elseif vel.y <= -1.25 then
+ grav = 0.0025
+ elseif vel.y <= -1 then
+ grav = 0.005
+ elseif vel.y <= -0.75 then
+ grav = 0.01
+ elseif vel.y <= -0.5 then
+ grav = 0.02
+ elseif vel.y <= -0.25 then
+ grav = 0.04
+ elseif vel.y <= 0 then
+ grav = 0.1
+ else -- vel.y > 0
+ grav = 0.5
+ end
end
+ player:set_physics_override({gravity = grav})
end
end
end
player:set_physics_override({
gravity = 1,
jump = 1,
+ speed = 1,
})
- hangglider.use[player:get_player_name()] = false
+ hangglider.use[pname] = false
+ if HUD_Overlay then
+ player:hud_change(hangglider.id[pname], "text", "blank.png")
+ end
+ hangglider.airbreak[pname] = false
end
end
end
minetest.register_on_joinplayer(function(player)
+ local pname = player:get_player_name()
player:set_physics_override({
gravity = 1,
jump = 1,
})
- hangglider.use[player:get_player_name()] = false
+ hangglider.use[pname] = false
+ if HUD_Overlay then
+ hangglider.id[pname] = player:hud_add({
+ hud_elem_type = "image",
+ text = "blank.png",
+ position = {x=0, y=0},
+ scale = {x=-100, y=-100},
+ alignment = {x=1, y=1},
+ offset = {x=0, y=0}
+ }) end
+ if debug then
+ hangglider.debug[pname] = {id = player:hud_add({hud_elem_type = "text",
+ position = {x=0.5, y=0.1},
+ text = "-",
+ number = 0xFF0000}), -- red text
+ -- ht = {50,50,50},
+ }
+ end
+ hangglider.airbreak[pname] = false
end)
minetest.register_on_leaveplayer(function(player)
- hangglider.use[player:get_player_name()] = nil
+ local pname = player:get_player_name()
+ hangglider.use[pname] = nil
+ if HUD_Overlay then hangglider.id[pname] = nil end
+ if debug then hangglider.debug[pname] = nil end
+ hangglider.airbreak[pname] = nil
end)
-minetest.register_craftitem("hangglider:hangglider", {
+minetest.register_tool("hangglider:hangglider", {
description = "Glider",
inventory_image = "glider_item.png",
-
+ stack_max=1,
on_use = function(itemstack, user, pointed_thing)
if not user then
return
end
local pos = user:get_pos()
- if minetest.get_node(pos).name == "air" and not hangglider.use[user:get_player_name()] then --Equip
+ local pname = user:get_player_name()
+ if minetest.get_node(pos).name == "air" and not hangglider.use[pname] then --Equip
minetest.sound_play("bedsheet", {pos=pos, max_hear_distance = 8, gain = 1.0})
- user:set_physics_override({
- gravity = 0.02,
- jump = 0,
- })
- local stopper = minetest.add_entity(pos, "hangglider:airstopper")
- stopper:get_luaentity().attach = user
- user:set_attach( stopper, "", {x=0,y=0,z=0}, {x=0,y=0,z=0})
- hangglider.use[user:get_player_name()] = true
+ if HUD_Overlay then user:hud_change(hangglider.id[pname], "text", "glider_struts.png") end
+ local vel = user:get_player_velocity().y
+ if vel < -2 then -- engage mid-air, falling fast, so stop but ramp velocity more quickly
+ hangglider.airbreak[pname] = true
+ user:set_physics_override({
+ gravity = 1,
+ jump = 0,
+ speed = 1.75,
+ })
+ local stopper = minetest.add_entity(pos, "hangglider:airstopper")
+ stopper:get_luaentity().attach = user
+ user:set_attach( stopper, "", {x=0,y=0,z=0}, {x=0,y=0,z=0})
+ else
+ user:set_physics_override({
+ gravity = 0.02,
+ jump = 0,
+ speed = 1.75,
+ })
+ end
+ hangglider.use[pname] = true
+ -- if minetest 0.4.x use this:
minetest.add_entity(user:get_pos(), "hangglider:glider"):set_attach(user, "", {x=0,y=0,z=0}, {x=0,y=0,z=0})
-
- elseif hangglider.use[user:get_player_name()] then --Unequip
- hangglider.use[user:get_player_name()] = false
+ -- if minetest 5.x use this:
+ -- minetest.add_entity(user:get_pos(), "hangglider:glider"):set_attach(user, "", {x=0,y=10,z=0}, {x=0,y=0,z=0})
+ itemstack:set_wear(itemstack:get_wear() + 255)
+ return itemstack
+ elseif hangglider.use[pname] then --Unequip
+ if HUD_Overlay then user:hud_change(hangglider.id[pname], "text", "blank.png") end
+ hangglider.use[pname] = false
end
- end
+ end,
+ sound = {breaks = "default_tool_breaks"},
})
minetest.register_craft({
projects / hangglider.git / commitdiff
