Remove vector_extras dependency

functions.lua

@@ -17,3 +17,22 @@ else
 	function riesenpilz.inform()
 	end
 end
+
+local circle_tables = {}
+function riesenpilz.circle(r)
+	local circle = circle_tables[r]
+	if circle then
+		return circle
+	end
+	local circle, n = {}, 1
+	for i = -r, r do
+		for j = -r, r do
+			if math.floor(math.sqrt(i * i + j * j) + 0.5) == r then
+				circle[n] = {x=i, y=0, z=j}
+				n = n+1
+			end
+		end
+	end
+	circle_tables[r] = circle
+	return circle
+end

init.lua

@@ -67,7 +67,8 @@ local function set_vm_data(manip, pznodes, pos, t1, name)
 		return
 	end
 	manip:write_to_map()
-	riesenpilz.inform("a giant "..name.." mushroom grew at "..vector.pos_to_string(pos), 3, t1)
+	riesenpilz.inform("a giant " .. name .. " mushroom grew at " ..
+		minetest.pos_to_string(pos), 3, t1)
 	local t1 = os.clock()
 	manip:update_map()
 	riesenpilz.inform("map updated", 3, t1)
@@ -191,7 +192,8 @@ local function riesenpilz_minecraft_fliegenpilz(pos)
 	manip:set_param2_data(param2s)
 	manip:write_to_map()
 	manip:update_map()
-	riesenpilz.inform("a fly agaric grew at "..vector.pos_to_string(pos), 3, t1)
+	riesenpilz.inform("a fly agaric grew at " .. minetest.pos_to_string(pos),
+		3, t1)
 end
 
 
@@ -501,7 +503,7 @@ local function riesenpilz_apple(pos)
 		return
 	end
 	manip:write_to_map()
-	riesenpilz.inform("an apple grew at "..vector.pos_to_string(pos), 3, t1)
+	riesenpilz.inform("an apple grew at " .. minetest.pos_to_string(pos), 3, t1)
 	manip:update_map()
 end
 
@@ -816,7 +818,7 @@ for name,i in pairs({
 
 			-- witch circles
 				local ps = {}
-				for _,p in pairs(vector.circle(math.random(rmin, rmax))) do
+				for _,p in pairs(riesenpilz.circle(math.random(rmin, rmax))) do
 					local p = vector.add(pos, p)
 
 				-- currently 3 is used here, approved by its use in the mapgen

mapgen.lua

@@ -79,8 +79,8 @@ end
 
 local data = {}
 local area, pr
-function riesenpilz_circle(nam, pos, radius, chance)
+local function make_circle(nam, pos, radius, chance)
-	local circle = vector.circle(radius)
+	local circle = riesenpilz.circle(radius)
 	for i = 1, #circle do
 		if pr:next(1, chance) == 1 then
 			local vi = area:indexp(vector.add(pos, circle[i]))
@@ -231,13 +231,13 @@ minetest.register_on_generated(function(minp, maxp, seed)
 					if pr:next(1,15) == 1 then
 						data[vi + area.ystride] = c.dry_shrub
 					elseif pr:next(1,80) == 1 then
-						riesenpilz_circle(c.riesenpilz_brown, boden, pr:next(3,4), 3)
+						make_circle(c.riesenpilz_brown, boden, pr:next(3,4), 3)
 					elseif pr:next(1,85) == 1 then
-						riesenpilz_circle(c.riesenpilz_parasol, boden, pr:next(3,5), 3)
+						make_circle(c.riesenpilz_parasol, boden, pr:next(3,5), 3)
 					elseif pr:next(1,90) == 1 then
-						riesenpilz_circle(c.riesenpilz_red, boden, pr:next(4,5), 3)
+						make_circle(c.riesenpilz_red, boden, pr:next(4,5), 3)
 					elseif pr:next(1,100) == 1 then
-						riesenpilz_circle(c.riesenpilz_fly_agaric, boden, 4, 3)
+						make_circle(c.riesenpilz_fly_agaric, boden, 4, 3)
 					elseif pr:next(1,340) == 10 then
 						bigtype = 2
 					elseif pr:next(1,380) == 1 then
@@ -247,9 +247,9 @@ minetest.register_on_generated(function(minp, maxp, seed)
 					elseif pr:next(1,800) == 7 then
 						bigtype = 5
 					elseif pr:next(1,4000) == 1 then
-						riesenpilz_circle(c.riesenpilz_lavashroom, boden, pr:next(5,6), 3)
+						make_circle(c.riesenpilz_lavashroom, boden, pr:next(5,6), 3)
 					elseif pr:next(1,5000) == 1 then
-						riesenpilz_circle(c.riesenpilz_glowshroom, boden, 3, 3)
+						make_circle(c.riesenpilz_glowshroom, boden, 3, 3)
 					elseif pr:next(1,6000) == 2 then
 						if pr:next(1,200) == 15 then
 							bigtype = 4

mod.conf

@@ -1,3 +1,3 @@
 name = riesenpilz
-depends = default,vector_extras
+depends = default
 optional_depends = digilines,fence_registration,technic