Add crystal (spread laser in all dirs)

mods/lzr_laser/blocks.lua

@@ -229,6 +229,28 @@ register_element("transmissive_mirror", {
 	})
 }, { allow_take = true })
 
+register_element("crystal", {
+	description = S("Crystal"),
+	paramtype2 = "facedir",
+	tiles_takable_off = {
+		"lzr_laser_crystal.png",
+	},
+	tiles_takable_on = {
+		"lzr_laser_crystal_on.png",
+	},
+	tiles_off = {
+		"lzr_laser_crystal.png^lzr_laser_fixed.png",
+	},
+	tiles_on = {
+		"lzr_laser_crystal_on.png^lzr_laser_fixed.png",
+	},
+	groups = { laser_block = 1 },
+	sounds = lzr_sounds.node_sound_glass_defaults({
+		_rotate = {name = "lzr_laser_mirror_rotate", gain = 1.0},
+	})
+}, { allow_take = true })
+
+
 
 
 register_element("emitter", {

mods/lzr_laser/physics.lua

@@ -36,6 +36,9 @@ function lzr_laser.add_laser(pos, dir)
 		if mirror_dir then
 			local def = minetest.registered_nodes[node.name]
 			local active = def._lzr_active
+			if not active then
+				return false
+			end
 			-- Activate mirror node
 			minetest.set_node(pos, {name=def._lzr_active, param2 = node.param2})
 			-- Set new pos and dir
@@ -51,6 +54,9 @@ function lzr_laser.add_laser(pos, dir)
 		if mirror_dir then
 			local def = minetest.registered_nodes[node.name]
 			local active = def._lzr_active
+			if not active then
+				return false
+			end
 			-- Activate mirror node
 			minetest.set_node(pos, {name=active, param2 = node.param2})
 			-- Set new pos and dir
@@ -58,12 +64,39 @@ function lzr_laser.add_laser(pos, dir)
 			local dir_straight = dir
 			local pos_mirrored = vector.add(pos, mirror_dir)
 			local dir_mirrored = mirror_dir
-			--return {{pos_straight, dir_straight}}
-			--return {{pos_mirrored, dir_mirrored}}
 			return {{pos_straight, dir_straight}, {pos_mirrored, dir_mirrored}}
 		else
 			return false
 		end
+	-- Spread laser to all directions
+	elseif minetest.get_item_group(node.name, "crystal") > 0 then
+		local def = minetest.registered_nodes[node.name]
+		local active = def._lzr_active
+		if not active then
+			return false
+		end
+		-- Activate node
+		minetest.set_node(pos, {name=active, param2 = node.param2})
+		-- Set dirs
+		local dirs = {
+			{ x = 0, y = -1, z = 0 },
+			{ x = 0, y = 1, z = 0 },
+			{ x = -1, y = 0, z = 0 },
+			{ x = 1, y = 0, z = 0 },
+			{ x = 0, y = 0, z = -1 },
+			{ x = 0, y = 0, z = 1 },
+		}
+		for d=1, #dirs do
+			if vector.equals(dirs[d], dirs) then
+				table.remove(dirs, d)
+				break
+			end
+		end
+		local output = {}
+		for d=1, #dirs do
+			table.insert(output, { vector.add(pos, dirs[d]), dirs[d] })
+		end
+		return output
 	-- Detector
 	elseif minetest.get_item_group(node.name, "detector") > 0 then
 		local detected = lzr_laser.check_detector(pos, dir)