make bathroom taps use the new particles code

also make shower tray turn off taps above it, if any
minor tweak to particles function to add Y velocity
added more detailed collision boxes to the sinks to accommodate particles

homedecor/bathroom_sanitation.lua

@@ -95,13 +95,44 @@ homedecor.register("sink", {
 	},
 	inventory_image="homedecor_bathroom_sink_inv.png",
 	selection_box = sink_cbox,
-	collision_box = sink_cbox,
 	groups = {cracky=3},
 	sounds = default.node_sound_stone_defaults(),
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{ -5/16,  5/16, 1/16, -4/16, 8/16, 8/16 },
+			{  5/16,  5/16, 1/16,  4/16, 8/16, 8/16 },
+			{ -5/16,  5/16, 1/16,  5/16, 8/16, 2/16 },
+			{ -5/16,  5/16, 6/16,  5/16, 8/16, 8/16 },
+			{ -4/16, -8/16, 1/16,  4/16, 5/16, 6/16 }
+		}
+	},
+	on_destruct = function(pos)
+		homedecor.stop_particle_spawner({x=pos.x, y=pos.y+1, z=pos.z})
+	end
 })
 
 --Taps
 
+local function taps_on_rightclick(pos, node, clicker)
+	local below = minetest.get_node_or_nil({x=pos.x, y=pos.y-1, z=pos.z})
+	if below and
+	  string.find(below.name, "homedecor:shower_tray") or
+	  string.find(below.name, "homedecor:sink") or
+	  string.find(below.name, "homedecor:kitchen_cabinet_with_sink") then
+		local particledef = {
+			outlet_x    = 0,
+			outlet_y    = -0.44,
+			outlet_z    = 0.28,
+			velocity_x  = { min = -0.1, max = 0.1 },
+			velocity_y  = -0.3,
+			velocity_z  = { min = -0.1, max = 0 },
+			spread      = 0
+		}
+		homedecor.start_particle_spawner(pos, node, particledef, "homedecor_shower")
+	end
+end
+
 homedecor.register("taps", {
 	description = S("Bathroom taps/faucet"),
 	mesh = "homedecor_bathroom_faucet.obj",
@@ -120,6 +151,8 @@ homedecor.register("taps", {
 	walkable = false,
 	groups = {cracky=3},
 	sounds = default.node_sound_stone_defaults(),
+	on_rightclick = taps_on_rightclick,
+	on_destruct = homedecor.stop_particle_spawner
 })
 
 homedecor.register("taps_brass", {
@@ -140,6 +173,8 @@ homedecor.register("taps_brass", {
 	walkable = false,
 	groups = {cracky=3},
 	sounds = default.node_sound_stone_defaults(),
+	on_rightclick = taps_on_rightclick,
+	on_destruct = homedecor.stop_particle_spawner
 })
 
 --Shower Tray
@@ -167,8 +202,8 @@ homedecor.register("shower_tray", {
 	groups = {cracky=2},
 	sounds = default.node_sound_stone_defaults(),
 	on_destruct = function(pos)
-		headpos = {x=pos.x, y=pos.y+2, z=pos.z}
+		homedecor.stop_particle_spawner({x=pos.x, y=pos.y+2, z=pos.z}) -- the showerhead
-		homedecor.stop_particle_spawner(headpos)
+		homedecor.stop_particle_spawner({x=pos.x, y=pos.y+1, z=pos.z}) -- the taps, if any
 	end
 })
 
@@ -200,6 +235,7 @@ homedecor.register("shower_head", {
 				outlet_y    = -0.42,
 				outlet_z    = 0.1,
 				velocity_x  = { min = -0.15, max = 0.15 },
+				velocity_y  = -2,
 				velocity_z  = { min = -0.3,  max = 0.1 },
 				spread      = 0.12
 			}

homedecor/handlers/water_particles.lua

@@ -7,8 +7,9 @@
 -- outletx/y/z are the exact coords of the starting point
 --     for the spawner, relative to the center of the node
 --
--- velocityx/y are the speed of the particles,
+-- velocityx/y/z are the speed of the particles,
---     relative to a node placed while looking north (facedir 0)
+--    (x and z are relative to a node placed while looking north/facedir 0)
+--    negative Y values flow downward.
 --
 -- spread is the radius from the starting point,
 -- along X and Z only, to randomly spawn particles.
@@ -42,6 +43,7 @@ function homedecor.start_particle_spawner(pos, node, particledef, soundname)
 		local outlety    = particledef.outlet_y
 		local outletz    = particledef.outlet_z
 		local velocityx  = particledef.velocity_x
+		local velocityy  = particledef.velocity_y
 		local velocityz  = particledef.velocity_z
 		local spread     = particledef.spread
 
@@ -71,8 +73,8 @@ function homedecor.start_particle_spawner(pos, node, particledef, soundname)
 			collisiondetection = true,
 			minpos = {x=pos.x - minx, y=pos.y + outlety, z=pos.z - minz},
 			maxpos = {x=pos.x - maxx, y=pos.y + outlety, z=pos.z - maxz},
-			minvel = {x = minvelx, y=-2, z = minvelz},
+			minvel = {x = minvelx, y = velocityy, z = minvelz},
-			maxvel = {x = maxvelx, y=-2, z = maxvelz},
+			maxvel = {x = maxvelx, y = velocityy, z = maxvelz},
 			minacc = {x=0, y=0, z=0},
 			maxacc = {x=0, y=-0.05, z=0},
 			minexptime = 2,

homedecor/kitchen_furniture.lua

@@ -69,6 +69,19 @@ homedecor.register("kitchen_cabinet_with_sink", {
 	inventory = {
 		size=16,
 	},
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{ -8/16, -8/16, -8/16,  8/16, 6/16,  8/16 },
+			{ -8/16,  6/16, -8/16, -6/16, 8/16,  8/16 },
+			{  6/16,  6/16, -8/16,  8/16, 8/16,  8/16 },
+			{ -8/16,  6/16, -8/16,  8/16, 8/16, -6/16 },
+			{ -8/16,  6/16,  6/16,  8/16, 8/16,  8/16 },
+		}
+	},
+	on_destruct = function(pos)
+		homedecor.stop_particle_spawner({x=pos.x, y=pos.y+1, z=pos.z})
+	end
 })
 
 local cp_cbox = {