updated scripting api a bit

--HG--
rename : data/luaobjects/test/client.lua => data/scripts/objects/test/client.lua
rename : data/luaobjects/test/server.lua => data/scripts/objects/test/server.lua

data/scripts/objects/test/client.lua

@@ -0,0 +1,137 @@
+-- Client-side code of the test lua object
+
+--
+-- Some helper functions and classes
+--
+
+function split(str, pat)
+   local t = {}  -- NOTE: use {n = 0} in Lua-5.0
+   local fpat = "(.-)" .. pat
+   local last_end = 1
+   local s, e, cap = str:find(fpat, 1)
+   while s do
+      if s ~= 1 or cap ~= "" then
+	 table.insert(t,cap)
+      end
+      last_end = e+1
+      s, e, cap = str:find(fpat, last_end)
+   end
+   if last_end <= #str then
+      cap = str:sub(last_end)
+      table.insert(t, cap)
+   end
+   return t
+end
+
+-- For debugging
+function dump(o)
+    if type(o) == 'table' then
+        local s = '{ '
+        for k,v in pairs(o) do
+                if type(k) ~= 'number' then k = '"'..k..'"' end
+                s = s .. '['..k..'] = ' .. dump(v) .. ','
+        end
+        return s .. '} '
+    else
+        return tostring(o)
+    end
+end
+
+function vector_subtract(a, b)
+	return {X=a.X-b.X, Y=a.Y-b.Y, Z=a.Z-b.Z}
+end
+
+function vector_add(a, b)
+	return {X=a.X+b.X, Y=a.Y+b.Y, Z=a.Z+b.Z}
+end
+
+function vector_multiply(a, d)
+	return {X=a.X*d, Y=a.Y*d, Z=a.Z*d}
+end
+
+SmoothTranslator = {}
+SmoothTranslator.__index = SmoothTranslator
+
+function SmoothTranslator.create()
+	local obj = {}
+	setmetatable(obj, SmoothTranslator)
+	obj.vect_old = {X=0, Y=0, Z=0}
+	obj.anim_counter = 0
+	obj.anim_time = 0
+	obj.anim_time_counter = 0
+	obj.vect_show = {X=0, Y=0, Z=0}
+	obj.vect_aim = {X=0, Y=0, Z=0}
+	return obj
+end
+
+function SmoothTranslator:update(vect_new)
+	self.vect_old = self.vect_show
+	self.vect_aim = vect_new
+	if self.anim_time < 0.001 or self.anim_time > 1.0 then
+		self.anim_time = self.anim_time_counter
+	else
+		self.anim_time = self.anim_time * 0.9 + self.anim_time_counter * 0.1
+	end
+	self.anim_time_counter = 0
+	self.anim_counter = 0
+end
+
+function SmoothTranslator:translate(dtime)
+	self.anim_time_counter = self.anim_time_counter + dtime
+	self.anim_counter = self.anim_counter + dtime
+	vect_move = vector_subtract(self.vect_aim, self.vect_old)
+	moveratio = 1.0
+	if self.anim_time > 0.001 then
+		moveratio = self.anim_time_counter / self.anim_time
+	end
+	-- Move a bit less than should, to avoid oscillation
+	moveratio = moveratio * 0.8
+	if moveratio > 1.5 then
+		moveratio = 1.5
+	end
+	self.vect_show = vector_add(self.vect_old, vector_multiply(vect_move, moveratio))
+end
+
+--
+-- Actual code
+--
+
+pos_trans = SmoothTranslator.create()
+rot_trans = SmoothTranslator.create()
+
+-- Callback functions
+
+function on_step(self, dtime)
+	pos_trans:translate(dtime)
+	rot_trans:translate(dtime)
+	object_set_position(self, pos_trans.vect_show)
+	object_set_rotation(self, rot_trans.vect_show)
+end
+
+function on_process_message(self, data)
+	--print("client got message: " .. data)
+
+	-- Receive our custom messages
+
+	sp = split(data, " ")
+	if sp[1] == "pos" then
+		pos_trans:update({X=sp[2], Y=sp[3], Z=sp[4]})
+	end
+	if sp[1] == "rot" then
+		rot_trans:update({X=sp[2], Y=sp[3], Z=sp[4]})
+	end
+end
+
+function on_initialize(self, data)
+	print("client object got initialization: " .. data)
+
+	corners = {
+		{-1/2,-1/2, 0},
+		{ 1/2,-1/2, 0},
+		{ 1/2, 0, 0},
+		{-1/2, 0, 0},
+	}
+	object_add_to_mesh(self, "rat.png", corners, false)
+
+end
+