add signs_lib placement rules

only works on signs_lib commit dcdee222 or later.

7 files changed, 266 insertions, 5 deletions

diff --git a/depends.txt b/depends.txt
index d84e224..efa0b33 100644
--- a/depends.txt
+++ b/depends.txt
@@ -4,3 +4,4 @@ screwdriver
 mesecons?
 mesecons_mvps?
 digilines?
+signs_lib?
diff --git a/devices.lua b/devices.lua
index 340fc4d..3d23210 100644
--- a/devices.lua
+++ b/devices.lua
@@ -706,7 +706,9 @@ minetest.register_node(nodename_sp_empty, {
 	end,
 	selection_box = sp_cbox,
 	collision_box = sp_cbox,
-	on_rotate = pipeworks.fix_after_rotation
+	on_rotate = pipeworks.fix_after_rotation,
+	check_for_pole = pipeworks.check_for_vert_pipe,
+	check_for_horiz_pole = pipeworks.check_for_horiz_pipe
 })
 
 local nodename_sp_loaded = "pipeworks:straight_pipe_loaded"
@@ -727,7 +729,9 @@ minetest.register_node(nodename_sp_loaded, {
 	selection_box = sp_cbox,
 	collision_box = sp_cbox,
 	drop = "pipeworks:straight_pipe_empty",
-	on_rotate = pipeworks.fix_after_rotation
+	on_rotate = pipeworks.fix_after_rotation,
+	check_for_pole = pipeworks.check_for_vert_pipe,
+	check_for_horiz_pole = pipeworks.check_for_horiz_pipe
 })
 
 new_flow_logic_register.directional_horizonal_rotate(nodename_sp_empty, true)
diff --git a/init.lua b/init.lua
index 445a8d4..ed93dd5 100644
--- a/init.lua
+++ b/init.lua
@@ -102,6 +102,10 @@ if pipeworks.toggles.finite_water == nil then
 	dofile(pipeworks.modpath.."/autodetect-finite-water.lua")
 end
 
+if minetest.get_modpath("signs_lib") then
+	dofile(pipeworks.modpath.."/signs_compat.lua")
+end
+
 dofile(pipeworks.modpath.."/common.lua")
 dofile(pipeworks.modpath.."/models.lua")
 dofile(pipeworks.modpath.."/autoplace_pipes.lua")
diff --git a/pipes.lua b/pipes.lua
index 04988ca..3201d79 100644
--- a/pipes.lua
+++ b/pipes.lua
@@ -82,7 +82,10 @@ for index, connects in ipairs(cconnects) do
 		after_dig_node = function(pos)
 			pipeworks.scan_for_pipe_objects(pos)
 		end,
-		on_rotate = false
+		on_rotate = false,
+		check_for_pole = pipeworks.check_for_vert_pipe,
+		check_for_horiz_pole = pipeworks.check_for_horiz_pipe,
+		pipenumber = index
 	})
 	
 	local pgroups = {snappy = 3, pipe = 1, not_in_creative_inventory = 1}
@@ -114,7 +117,10 @@ for index, connects in ipairs(cconnects) do
 		after_dig_node = function(pos)
 			pipeworks.scan_for_pipe_objects(pos)
 		end,
-		on_rotate = false
+		on_rotate = false,
+		check_for_pole = pipeworks.check_for_vert_pipe,
+		check_for_horiz_pole = pipeworks.check_for_horiz_pipe,
+		pipenumber = index
 	})
 	
 	local emptypipe = "pipeworks:pipe_"..index.."_empty"
diff --git a/routing_tubes.lua b/routing_tubes.lua
index 45fcea8..3a69c0a 100644
--- a/routing_tubes.lua
+++ b/routing_tubes.lua
@@ -162,6 +162,8 @@ if pipeworks.enable_one_way_tube then
 		after_place_node = pipeworks.after_place,
 		after_dig_node = pipeworks.after_dig,
 		on_rotate = pipeworks.on_rotate,
+		check_for_pole = pipeworks.check_for_vert_tube,
+		check_for_horiz_pole = pipeworks.check_for_horiz_tube
 	})
 	minetest.register_craft({
 		output = "pipeworks:one_way_tube 2",
diff --git a/signs_compat.lua b/signs_compat.lua
new file mode 100644
index 0000000..cf86f70
--- /dev/null
+++ b/signs_compat.lua
@@ -0,0 +1,241 @@
+-- This file adds placement rules for signs_lib, if present
+
+local spv = {
+	[4] = true,
+	[6] = true,
+	[8] = true,
+	[10] = true,
+	[13] = true,
+	[15] = true,
+	[17] = true,
+	[19] = true
+}
+
+local sphns = {
+	[1] = true,
+	[3] = true,
+	[5] = true,
+	[7] = true,
+	[9] = true,
+	[11] = true,
+	[21] = true,
+	[23] = true
+}
+
+local sphew = {
+	[0] = true,
+	[2] = true,
+	[12] = true,
+	[14] = true,
+	[16] = true,
+	[18] = true,
+	[20] = true,
+	[22] = true
+}
+
+local owtv = {
+	[5] = true,
+	[7] = true,
+	[9] = true,
+	[11] = true,
+	[12] = true,
+	[14] = true,
+	[16] = true,
+	[18] = true
+}
+
+local owtns = {
+	[0] = true,
+	[2] = true,
+	[4] = true,
+	[6] = true,
+	[8] = true,
+	[10] = true,
+	[20] = true,
+	[22] = true
+}
+
+local owtew = {
+	[1] = true,
+	[3] = true,
+	[13] = true,
+	[15] = true,
+	[17] = true,
+	[19] = true,
+	[21] = true,
+	[23] = true
+}
+
+local vert_n = {
+	[3] = {[5] = true},
+	[6] = {[9] = true, [12] = true, [16] = true},
+	[7] = {[9] = true, [11] = true},
+}
+
+local vert_e = {
+	[3] = {[5] = true},
+	[6] = {[5] = true, [9] = true, [16] = true},
+	[7] = {[7] = true, [11] = true},
+}
+
+local vert_s = {
+	[3] = {[5] = true},
+	[6] = {[5] = true, [12] = true, [16] = true},
+	[7] = {[5] = true, [7] = true},
+}
+
+local vert_w = {
+	[3] = {[5] = true},
+	[6] = {[5] = true, [9] = true, [12] = true},
+	[7] = {[5] = true, [9] = true},
+}
+
+local horiz_n = {
+	[3] = {[0] = true},
+	[6] = {[0] = true, [4] = true, [20] = true},
+	[7] = {[2] = true, [10] = true},
+	[8] = {[0] = true},
+	[9] = {[2] = true},
+}
+
+local horiz_e = {
+	[3] = {[1] = true},
+	[6] = {[1] = true, [17] = true, [21] = true},
+	[7] = {[3] = true, [19] = true},
+	[8] = {[1] = true},
+	[9] = {[3] = true},
+}
+
+local horiz_s = {
+	[3] = {[0] = true},
+	[6] = {[0] = true, [8] = true, [20] = true},
+	[7] = {[0] = true, [4] = true},
+	[8] = {[0] = true},
+	[9] = {[0] = true},
+}
+
+local horiz_w = {
+	[3] = {[1] = true},
+	[6] = {[1] = true, [13] = true, [21] = true},
+	[7] = {[1] = true, [13] = true},
+	[8] = {[1] = true},
+	[9] = {[1] = true},
+}
+
+local function get_sign_dir(node, def)
+	if (node.param2 == 4 and def.paramtype2 == "wallmounted")
+	  or (node.param2 == 0 and def.paramtype2 ~= "wallmounted") then
+		return {["N"] = true}
+	elseif (node.param2 == 2 and def.paramtype2 == "wallmounted")
+	  or (node.param2 == 1 and def.paramtype2 ~= "wallmounted") then
+		return {["E"] = true}
+	elseif (node.param2 == 5 and def.paramtype2 == "wallmounted")
+	  or (node.param2 == 2 and def.paramtype2 ~= "wallmounted") then
+		return {["S"] = true}
+	elseif node.param2 == 3 then
+		return {["W"] = true}
+	end
+	return {}
+end
+
+--[[
+In the functions below:
+
+ pos: the (real) position of the placed sign
+ node: the sign node itself
+ def: its definition
+
+ ppos: the position of the pointed node (pipe/tube)
+ pnode: the node itself
+ pdef: its definition
+
+--]]
+
+
+-- pipes
+
+function pipeworks.check_for_vert_pipe(pos, node, def, ppos, pnode, pdef)
+	local signdir = get_sign_dir(node, def)
+	local pipenumber = pdef.pipenumber
+	local pipedir = pnode.param2
+	if string.find(pnode.name, "straight_pipe") and spv[pipedir] then
+		return true
+	elseif signdir["N"] and vert_n[pipenumber] and vert_n[pipenumber][pipedir] then
+		return true
+	elseif signdir["E"] and vert_e[pipenumber] and vert_e[pipenumber][pipedir] then
+		return true
+	elseif signdir["S"] and vert_s[pipenumber] and vert_s[pipenumber][pipedir] then
+		return true
+	elseif signdir["W"] and vert_w[pipenumber] and vert_w[pipenumber][pipedir] then
+		return true
+	end
+end
+
+function pipeworks.check_for_horiz_pipe(pos, node, def, ppos, pnode, pdef)
+	local signdir = get_sign_dir(node, def)
+	local pipenumber = pdef.pipenumber
+	local pipedir = pnode.param2
+	if string.find(pnode.name, "straight_pipe") then
+		if (signdir["N"] or signdir["S"]) and sphns[pipedir] then
+			return true
+		elseif (signdir["E"] or signdir["W"]) and sphew[pipedir] then
+			return true
+		end
+	elseif signdir["N"] and horiz_n[pipenumber] and horiz_n[pipenumber][pipedir] then
+		return true
+	elseif signdir["E"] and horiz_e[pipenumber] and horiz_e[pipenumber][pipedir] then
+		return true
+	elseif signdir["S"] and horiz_s[pipenumber] and horiz_s[pipenumber][pipedir] then
+		return true
+	elseif signdir["W"] and horiz_w[pipenumber] and horiz_w[pipenumber][pipedir] then
+		return true
+	end
+end
+
+-- tubes
+
+function pipeworks.check_for_vert_tube(pos, node, def, ppos, pnode, pdef)
+	local signdir = get_sign_dir(node, def)
+	local tubenumber = pdef.tubenumber
+	local tubedir = pnode.param2
+	if pnode.name == "pipeworks:one_way_tube" and owtv[tubedir] then
+		return true
+	elseif tubenumber == 2 and (tubedir == 5 or tubedir == 7) then -- it's a stub pointing up or down
+		return true
+	elseif signdir["N"] and vert_n[tubenumber] and vert_n[tubenumber][tubedir] then
+		return true
+	elseif signdir["E"] and vert_e[tubenumber] and vert_e[tubenumber][tubedir] then
+		return true
+	elseif signdir["S"] and vert_s[tubenumber] and vert_s[tubenumber][tubedir] then
+		return true
+	elseif signdir["W"] and vert_w[tubenumber] and vert_w[tubenumber][tubedir] then
+		return true
+	end
+end
+
+function pipeworks.check_for_horiz_tube(pos, node, def, ppos, pnode, pdef)
+	local signdir = get_sign_dir(node, def)
+	local tubenumber = pdef.tubenumber
+	local tubedir = pnode.param2
+	if tubenumber == 2 then -- it'a a stub pointing sideways
+		if (tubedir == 0 or tubedir == 2) and (signdir["N"] or signdir["S"]) then
+			return true
+		elseif (tubedir == 1 or tubedir == 3) and (signdir["E"] or signdir["W"]) then
+			return true
+		end
+	elseif pnode.name == "pipeworks:one_way_tube" then
+		if (signdir["N"] or signdir["S"]) and owtns[tubedir] then
+			return true
+		elseif (signdir["E"] or signdir["W"]) and owtew[tubedir] then
+			return true
+		end
+	elseif signdir["N"] and horiz_n[tubenumber] and horiz_n[tubenumber][tubedir] then
+		return true
+	elseif signdir["E"] and horiz_e[tubenumber] and horiz_e[tubenumber][tubedir] then
+		return true
+	elseif signdir["S"] and horiz_s[tubenumber] and horiz_s[tubenumber][tubedir] then
+		return true
+	elseif signdir["W"] and horiz_w[tubenumber] and horiz_w[tubenumber][tubedir] then
+		return true
+	end
+end
diff --git a/tube_registration.lua b/tube_registration.lua
index 7bef10e..e92e676 100644
--- a/tube_registration.lua
+++ b/tube_registration.lua
@@ -116,7 +116,10 @@ local register_one_tube = function(name, tname, dropname, desc, plain, noctrs, e
 			end
 			minetest.swap_node(pos, {name = "pipeworks:broken_tube_1"})
 			pipeworks.scan_for_tube_objects(pos)
-		end
+		end,
+		check_for_pole = pipeworks.check_for_vert_tube,
+		check_for_horiz_pole = pipeworks.check_for_horiz_tube,
+		tubenumber = tonumber(tname)
 	}
 	if style == "6d" then
 		nodedef.paramtype2 = "facedir"