forked from minetest-mods/camera
393 lines
12 KiB
Lua
393 lines
12 KiB
Lua
local recordings = {}
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-- [function] Load recordings
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local path = minetest.get_worldpath()
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local function load()
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local res = io.open(path.."/recordings.txt", "r")
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if res then
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res = minetest.deserialize(res:read("*all"))
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if type(res) == "table" then
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recordings = res
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end
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end
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end
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-- Call load
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load()
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-- [function] Save recordings
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function save()
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io.open(path.."/recordings.txt", "w"):write(minetest.serialize(recordings))
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end
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-- [function] Get recording list per-player for chat
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function get_recordings(name)
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local recs = recordings[name]
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local list = ""
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if recs then
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for name, path in pairs(recs) do
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list = list..name..", "
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end
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return list
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else
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return "You do not saved any recordings."
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end
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end
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-- [event] On shutdown save recordings
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minetest.register_on_shutdown(save)
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-- Table for storing unsaved temporary recordings
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local temp = {}
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-- Table and functions for storing params per players
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local player_params = {}
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local function get_player_params(playern)
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if not player_params[playern] then
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player_params[playern] = {}
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end
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return player_params[playern]
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end
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-- Camera definition
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local camera = {
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description = "Camera",
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visual = "wielditem",
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textures = {},
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is_visible = false,
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collide_with_objects = false,
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collisionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
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physical = false,
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visual = "cube",
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driver = nil,
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mode = 0,
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velocity = {x=0, y=0, z=0},
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old_pos = nil,
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old_velocity = nil,
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pre_stop_dir = nil,
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MAX_V = 20,
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init = function(self, player, mode)
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self.driver = player
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self.mode = mode
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self.path = {}
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self.look_dir_init = player:get_look_dir()
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self.speed = 0
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end,
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}
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-- [event] On step
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function camera:on_step(dtime)
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-- if not driver, remove object
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if not self.driver then
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self.object:remove()
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return
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end
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local pos = self.object:getpos()
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local vel = self.object:getvelocity()
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-- if record mode
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if self.mode == 0 or self.mode > 1 then
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-- Calculate pitch and yaw if look target of player is defined
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local look_target = player_params[self.driver:get_player_name()].look_target
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if look_target then
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local vec_pos = vector.subtract(look_target, pos)
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-- Pitch
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if math.abs(vec_pos.z) > math.abs(vec_pos.x) then
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self.driver:set_look_vertical(-math.atan2(vec_pos.y, math.abs(vec_pos.z)))
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else
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self.driver:set_look_vertical(-math.atan2(vec_pos.y, math.abs(vec_pos.x)))
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end
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-- Yaw
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self.driver:set_look_horizontal(-math.atan2(vec_pos.x, vec_pos.z))
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end
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-- Update path
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self.path[#self.path + 1] = {
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pos = pos,
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velocity = vel,
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pitch = self.driver:get_look_vertical(),
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yaw = self.driver:get_look_horizontal()
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}
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-- Modify yaw and pitch to match driver (player)
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self.object:set_look_vertical(self.driver:get_look_vertical())
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self.object:set_look_horizontal(self.driver:get_look_horizontal())
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local params = get_player_params(self.driver:get_player_name())
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-- Get controls
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local ctrl = self.driver:get_player_control()
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-- Initialize speed
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--local speed = vector.distance(vector.new(), vel)
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local speed = self.speed
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-- if up, accelerate forward
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if ctrl.up then
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speed = math.min(speed + (params.speed_step or 0.1), 20)
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end
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-- if down, accelerate backward
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if ctrl.down then
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speed = math.max(speed - (params.speed_step or 0.1), -20)
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end
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-- if jump, brake
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if ctrl.jump then
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speed = math.max(speed * 0.9, 0.0)
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params.rotate_speed = math.max((params.rotate_speed or 0) * 0.9, 0.0)
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end
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-- if aux1 (aka key 'e'), stop recording
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if ctrl.aux1 then
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self.driver:set_detach()
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minetest.chat_send_player(self.driver:get_player_name(), "Recorded stopped after " .. #self.path .. " points")
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temp[self.driver:get_player_name()] = table.copy(self.path)
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self.object:remove()
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return
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end
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-- if sneak, stop rotation
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if ctrl.sneak then
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params.rotate = false
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params.rotate_speed = 0.0
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end
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-- if right, accelerate rotation to right
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if ctrl.right and params.look_target then
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params.rotate = true
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params.rotate_speed = math.min((params.rotate_speed or 0.0) + (params.speed_step or 0.1), 0.5)
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speed = 0
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end
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-- if left, accelerate rotation to left
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if ctrl.left and params.look_target then
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params.rotate = true
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params.rotate_speed = math.max((params.rotate_speed or 0.0) - (params.speed_step or 0.1), -1)
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speed = 0
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end
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-- Set updated velocity
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-- Normal Velocity mode
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if self.mode == 0 then
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self.object:setvelocity(vector.multiply(self.driver:get_look_dir(), speed))
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elseif self.mode > 1 then
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-- Rotation Velocity mode
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if params.rotate then
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self.object:setvelocity(
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vector.multiply(
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{
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x = self.object:get_velocity().x + math.cos(self.driver:get_look_horizontal()),
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y = speed,
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z = self.object:get_velocity().z + math.sin(self.driver:get_look_horizontal())
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},
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{
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x = params.rotate_speed,
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y = 1,
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z = params.rotate_speed
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}
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))
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-- if mode 3 then look target up or down at the same time of the camera during rotation
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if self.mode == 3 then
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-- First step (old_pos = pos)
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if not self.old_pos then self.old_pos = pos end
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look_target.y = look_target.y + (pos.y - self.old_pos.y)
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player_params[self.driver:get_player_name()].look_target = look_target
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-- memorize pos as old_pos for next steps
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self.old_pos = pos
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end
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else
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-- Looking target Velocity mode
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self.object:setvelocity(vector.multiply(self.look_dir_init, speed))
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end
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end
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-- memorize speed for next step
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self.speed = speed
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elseif self.mode == 1 then -- elseif playback mode
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-- Get controls
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local ctrl = self.driver:get_player_control()
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-- if aux1 or no path, stop playback
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if ctrl.aux1 or #self.path < 1 then
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self.driver:set_detach()
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minetest.chat_send_player(self.driver:get_player_name(), "Playback stopped")
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self.object:remove()
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return
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end
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-- Update position
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self.object:moveto(self.path[1].pos, true)
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-- Update yaw/pitch
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self.driver:set_look_horizontal(self.path[1].yaw)
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self.driver:set_look_vertical(self.path[1].pitch)
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-- Update velocity
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self.object:setvelocity(self.path[1].velocity)
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-- Remove path table
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table.remove(self.path, 1)
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end
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end
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-- Register entity
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minetest.register_entity("camera:camera", camera)
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-- Register chatcommand
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minetest.register_chatcommand("camera", {
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description = "Manipulate recording",
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params = "<option> <value>",
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func = function(name, param)
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local player = minetest.get_player_by_name(name)
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local param1, param2 = param:split(" ")[1], param:split(" ")[2]
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-- if play, begin playback preperation
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if param1 == "play" then
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local function play(path)
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local object = minetest.add_entity(player:getpos(), "camera:camera")
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object:get_luaentity():init(player, 1)
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object:setyaw(player:get_look_horizontal())
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player:set_attach(object, "", {x=5,y=10,z=0}, {x=0,y=0,z=0})
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object:get_luaentity().path = path
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end
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-- Check for param2 (recording name)
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if param2 and param2 ~= "" then
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-- if recording exists, start
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if recordings[name][param2] then
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play(table.copy(recordings[name][param2]))
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else -- else, return error
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return false, "Invalid recording "..param2..". Use /camera list to list recordings."
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end
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else -- else, check temp for a recording path
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if temp[name] then
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play(table.copy(temp[name]))
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else
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return false, "No recordings could be found"
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end
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end
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return true, "Playback started"
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elseif param1 == "save" then -- elseif save, prepare to save path
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-- if no table for player in recordings, initialize
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if not recordings[name] then
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recordings[name] = {}
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end
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-- if param2 is not blank, save
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if param2 and param2 ~= "" then
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recordings[name][param2] = temp[name]
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return true, "Saved recording as "..param2
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else -- else, return error
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return false, "Missing name to save recording under (/camera save <name>)"
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end
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elseif param1 == "list" then -- elseif list, list recordings
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return true, "Recordings: "..get_recordings(name)
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elseif param1 == "look" then
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if param2 and param2 ~= "" then
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if param2 == "nil" then
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get_player_params(name).look_target = nil
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return true, "Looking target removed"
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elseif param2 == "here" then
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local player_params = get_player_params(name)
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if (not player_params.mode) then
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player_params.mode = 2
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end
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player_params.look_target = player:getpos()
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return true, "Looking target fixed"
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else
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local look_target = string.split(param2, ",")
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if #look_target == 3 then
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local player_params = get_player_params(name)
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player_params.mode = 2
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player_params.look_target =
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{ x = tonumber(look_target[1]),
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y = tonumber(look_target[2]),
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z = tonumber(look_target[3])
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}
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return true, "Looking target fixed"
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else
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return false, "Looking target wrong format (/camera look <x,y,z>)"
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end
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end
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else
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return false, "Parameters of looking target are missing (/camera look <nil|here|x,y,z>)"
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end
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elseif param1 == "speed" then
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if param2 and param ~= "" then
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local speed = tonumber(param2)
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if speed then
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get_player_params(name).speed_step = 1/speed
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return true, "Speed step fixed to "..get_player_params(name).speed_step
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else
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return false, "Invalid speed step (/camera speed <number>)"
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end
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else return false, "Missing speed step parameter (/camera speed <number>)"
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end
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elseif param1 == "mode" then
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if param2 and param2 ~= "" then
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local mode = tonumber(param2)
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if mode == 0 or mode > 1 then
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get_player_params(name).mode = mode
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if mode == 0 then
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get_player_params(name).look_target = nil
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end
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return true, "Record mode is set"
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else return false, "Invalid mode (0: Velocity follow mouse (default), 2: Velocity locked to player first look direction, 3: Same as 2 but looking target can up/down when rotating)"
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end
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else return false, "Missing mod parameter (/camera mode <0|2|3>)"
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end
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elseif param1 == "help" then
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local str = "Usage: /camera\n"..
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"Execute command to start recording.\n"..
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"While recording:\n"..
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"- use up/down to accelerate/decelerate\n"..
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" - when rotating (mode 2 or 3) the camera up or down on Y axis\n"..
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"- use jump to brake\n"..
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"- use aux1 to stop recording\n"..
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"- use left/right to rotate if looking target is set\n"..
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"- use crouch to stop rotating\n"..
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"Use /camera play to play back the last recording. While playing back:\n"..
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"- use aux1 to stop playing back\n"..
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"Use /camera play <name> to play a specific recording\n"..
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"Use /camera save <name> to save the last recording\n"..
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"- saved recordings exist through game restarts\n"..
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"Use /camera list to show all saved recording\n"..
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"Use /camera mode <0|2|3> to change the velocity behaviour\n"..
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"- 0: Velocity follow mouse (default),\n"..
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"- 2: Velocity locked to player's first look direction with released mouse\n"..
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"- 3: Same that 2 but if you up or down when rotating then looking target will up or down too\n"..
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"Use /camera look <nil|here|x,y,z>\n"..
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"- nil: remove looking target,\n"..
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"- here: set looking target to player position,\n"..
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"- x,y,z: Coords to look at\n"..
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"Use /camera speed <speed>\n"..
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"- 10 is default speed,\n"..
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"- > 10 decrease speed factor,\n"..
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"- < 10 increase speed factor"
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return true, str
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else -- else, begin recording
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local object = minetest.add_entity(player:getpos(), "camera:camera")
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object:get_luaentity():init(player, get_player_params(name).mode)
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object:setyaw(player:get_look_horizontal())
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player:set_attach(object, "", {x=0,y=10,z=0}, {x=0,y=0,z=0})
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return true, "Recording started"
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end
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end,
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})
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minetest.log("action", "[camera] loaded.")
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