Play simple effect when laser destroys nodes

mods/lzr_laser/physics.lua

@@ -1,8 +1,9 @@
 -- Max. number of steps in the laser travel algorithm
 local MAX_LASER_ITERATIONS = 10000
 
--- TODO: Don't use this variable, instead transport it between functions
+-- TODO: Don't use these variables, instead transport it between functions
 local burning_cache = {}
+local destroy_cache = {}
 
 -- Add a laser node to pos with the direction `dir`.
 -- Dir is a direction vector, and only one direction must be set
@@ -22,6 +23,9 @@ function lzr_laser.add_laser(pos, dir, varea, vdata)
 		local dirs = lzr_laser.vector_to_dirs(dir)
 		local dirstring = lzr_laser.dirs_to_dirstring(dirs)
 		vdata[vi] = minetest.get_content_id("lzr_laser:laser_"..dirstring)
+		if ld == 1 then
+			table.insert(destroy_cache, {pos=pos, nodename=nodename})
+		end
 		pos = vector.add(pos, dir)
 		return {{pos, dir}}
 	elseif ld == 2 then
@@ -270,6 +274,7 @@ function lzr_laser.full_laser_update(pos1, pos2)
 	local benchmark_time_1 = minetest.get_us_time()
 
 	burning_cache = {}
+	destroy_cache = {}
 
 	local vmanip = minetest.get_voxel_manip(pos1, pos2)
 	local vpos1, vpos2 = vmanip:get_emerged_area()
@@ -284,6 +289,7 @@ function lzr_laser.full_laser_update(pos1, pos2)
 	vmanip:set_param2_data(vdata_p2)
 	vmanip:write_to_map()
 
+	-- Trigger node burning for nodes burned by laser
 	for b=1, #burning_cache do
 		local node = minetest.get_node(burning_cache[b])
 		local def = minetest.registered_nodes[node.name]
@@ -292,6 +298,31 @@ function lzr_laser.full_laser_update(pos1, pos2)
 		end
 	end
 	burning_cache = {}
+	-- Trigger animation and sound effect for nodes destroyed by laser
+	for d=1, #destroy_cache do
+		local dpos = destroy_cache[d].pos
+		local nodename = destroy_cache[d].nodename
+		local def = minetest.registered_nodes[nodename]
+		if def and def.sounds and def.sounds.dug then
+			minetest.sound_play(def.sounds.dug, {pos=dpos}, true)
+		end
+		minetest.add_particlespawner({
+			amount = 12,
+			time = 0.001,
+			minpos = vector.subtract(dpos, vector.new(0.5, 0.5, 0.5)),
+			maxpos = vector.add(dpos, vector.new(0.5, 0.5, 0.5)),
+			minvel = vector.new(-0.5, -0.2, -0.5),
+			maxvel = vector.new(0.5, 0.2, 0.5),
+			minacc = vector.new(0, -lzr_globals.GRAVITY, 0),
+			maxacc = vector.new(0, -lzr_globals.GRAVITY, 0),
+			minsize = 0.8,
+			maxsize = 0.8,
+			minexptime = 0.5,
+			maxexptime = 0.55,
+			node = {name=nodename},
+		})
+	end
+	destroy_cache = {}
 
 	-- Print benchmark time
 	local benchmark_time_2 = minetest.get_us_time()