Add portal ignition sparks

init.lua

@@ -23,7 +23,8 @@ local S = minetest.get_translator("nether")
 
 -- Global Nether namespace
 nether                = {}
-nether.path = minetest.get_modpath("nether")
+nether.modname        = minetest.get_current_modname()
+nether.path           = minetest.get_modpath(nether.modname)
 nether.get_translator = S
 
 -- Settings
@@ -108,5 +109,31 @@ The expedition parties have found no diamonds or gold, and after an experienced
 			destination_pos.y = nether.find_surface_target_y(destination_pos.x, destination_pos.z, "nether_portal")
 			return destination_pos
 		end
+	end,
+
+	on_ignite = function(portalDef, anochorPos, orientation)
+
+		local make_sparks_fly = function(pos)
+			minetest.add_particlespawner({
+				amount = 14,
+				time   = 0.1,
+				minpos = {x = pos.x - 0.25, y = pos.y - 0.25, z = pos.z - 0.25},
+				maxpos = {x = pos.x + 0.25, y = pos.y + 0.25, z = pos.z + 0.25},
+				minvel = {x = -5, y = -1, z = -5},
+				maxvel = {x =  5, y =  1, z =  5},
+				minacc = {x =  0, y =  0, z =  0},
+				maxacc = {x =  0, y =  0, z =  0},
+				minexptime = 0.1,
+				maxexptime = 0.5,
+				minsize = 0.2,
+				maxsize = 0.8,
+				collisiondetection = false,
+				texture = portalDef.particle_texture .. "^[colorize:#F4F:alpha",
+				glow = 8
+			})
 		end
+
+		portalDef.shape.apply_func_to_wormhole_nodes(anochorPos, orientation, make_sparks_fly)
+	end
+	
 })

portal_api.txt

@@ -68,11 +68,19 @@ Used by `nether.register_portal`.
 
 		wormhole_node_color = 0,
         -- A value from 0 to 7 corresponding to the color of pixels in 
-        -- nether_portals_palette.png
+        -- nether_portals_palette.png:
+	    --     0 traditional/magenta
+	    --     1 black
+	    --     2 blue
+	    --     3 green
+	    --     4 cyan
+	    --     5 red
+	    --     6 yellow
+	    --     7 white
 
 		particle_color      = "#808",
-        -- Optional. Will default to the same colour as wormhole_node_color if
+        -- Optional. Will default to a colour matching the wormhole_node_color
-        -- not specified.
+        -- if not specified.
 
 		frame_node_name     = "default:obsidian",
         -- Required. For best results, have your portal constructed of a 
@@ -98,6 +106,9 @@ Used by `nether.register_portal`.
         -- Return an anchorPos or anchorPos, orientation
         -- If orientation is not specified then the orientation of the surface
         -- portal will be used.
+        -- If the location of an existing portal is returned then include the
+        -- orientation, otherwise the existing portal could be overwritten by
+        -- a new one with the orientation of the surface portal.
 
 		find_surface_anchorPos = function(realm_anchorPos),
         -- Optional. If you don't implement this then a position near the
@@ -105,6 +116,9 @@ Used by `nether.register_portal`.
         -- Return an anchorPos or (anchorPos, orientation)
         -- If orientation is not specified then the orientation of the realm
         -- portal will be used. 
+        -- If the location of an existing portal is returned then include the
+        -- orientation, otherwise the existing portal could be overwritten by
+        -- a new one with the orientation of the realm portal.
 
 		on_run_wormhole      = function(portalDef, anochorPos, orientation),
         -- invoked once per second per portal