Initial commit.

init.lua

@@ -0,0 +1,133 @@
+
+--[[
+
+Copyright 2016 - Auke Kok <sofar@foo-projects.org>
+
+License:
+    - Code: WTFPL
+    - Models and textures: CC-BY-SA-3.0
+
+Usage: /give <name> camera:camera
+
+    left click a camera item to start recording. While recording:
+    - use up/down to accelerate/decelerate
+    - use jump to brake
+    - use crouch to stop recording
+
+    right click a camera item to play back a recording. While playing back:
+    - use crouch to stop playing back
+
+--]]
+
+local recordings = {}
+
+local camera = {
+	description = "Camera",
+	physical = false,
+	visual = "mesh",
+	mesh = "camera.obj",
+	textures = { "camera_camera.png" },
+	collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
+	driver = nil,
+	mode = 0,
+	velocity = {x=0, y=0, z=0},
+	old_pos = nil,
+	old_velocity = nil,
+	pre_stop_dir = nil,
+	MAX_V = 20,
+	init = function(self, player, mode)
+		self.driver = player
+		self.mode = mode
+		self.path = {}
+	end,
+}
+
+function camera:on_step(dtime)
+	if not self.driver then
+		self.object:remove()
+		return
+	end
+	local pos = self.object:getpos()
+	local vel = self.object:getvelocity()
+	local dir = self.driver:get_look_dir()
+
+	if self.mode == 0 then
+		-- record
+		self.path[#self.path + 1] = {
+			pos = pos,
+			velocity = vel,
+			pitch = self.driver:get_look_pitch(),
+			yaw = self.driver:get_look_yaw()
+		}
+
+		-- player control of vehicle
+		-- always modify yaw/pitch to match player
+		self.object:set_look_pitch(self.driver:get_look_pitch())
+		self.object:set_look_yaw(self.driver:get_look_yaw())
+	
+		-- accel/decel/stop
+		local ctrl = self.driver:get_player_control()
+		local speed = vector.distance(vector.new(), vel)
+		if ctrl.up then
+			-- forward accelerate
+			speed = math.min(speed + 0.1, 20)
+		end
+		if ctrl.down then
+			-- backward acccelerate
+			speed = math.max(speed - 0.1, -20)
+		end
+		if ctrl.jump then
+			-- brake
+			speed = math.max(speed * 0.9, 0.0)
+		end
+		if ctrl.sneak then
+			-- stop recording!
+			self.driver:set_detach()
+			minetest.chat_send_player(self.driver:get_player_name(), "Recorded stopped after " .. #self.path .. " points")
+			recordings[self.driver:get_player_name()] = table.copy(self.path)
+			self.object:remove()
+			return
+		end
+		self.object:setvelocity(vector.multiply(self.driver:get_look_dir(), speed))
+	elseif self.mode == 1 then
+		-- stop playback ?
+		local ctrl = self.driver:get_player_control()
+		if ctrl.sneak or #self.path < 1 then
+			-- stop playback
+			self.driver:set_detach()
+			minetest.chat_send_player(self.driver:get_player_name(), "Playback stopped")
+			self.object:remove()
+			return
+		end
+
+		-- playback
+		self.object:moveto(self.path[1].pos, true)
+		self.driver:set_look_yaw(self.path[1].yaw - (math.pi/2))
+		self.driver:set_look_pitch(0 - self.path[1].pitch)
+		self.object:setvelocity(self.path[1].velocity)
+		table.remove(self.path, 1)
+	end
+end
+
+minetest.register_entity("camera:camera", camera)
+
+minetest.register_craftitem("camera:camera", {
+	description = "Camera",
+	inventory_image = "camera_item.png",
+	on_use = function(itemstack, player, pointed_thing)
+		local object = minetest.add_entity(player:getpos(), "camera:camera")
+		object:get_luaentity():init(player, 0)
+		object:setyaw(player:get_look_yaw())
+		player:set_attach(object, "", {x=0,y=10,z=0}, {x=0,y=0,z=0})
+	end,
+	on_secondary_use = function(itemstack, player, pointed_thing)
+		if not recordings[player:get_player_name()] then
+			return
+		end
+		local object = minetest.add_entity(player:getpos(), "camera:camera")
+		object:get_luaentity():init(player, 1)
+		object:setyaw(player:get_look_yaw())
+		player:set_attach(object, "", {x=5,y=10,z=0}, {x=0,y=0,z=0})
+		object:get_luaentity().path = table.copy(recordings[player:get_player_name()])
+	end,
+})