Mining laser fixes (#421)

Do not remove air and group:hot nodes instead of using a fixed list
Abort mining when encountering an unknown node
Add random to the smoke puff particle
Set mining laser tool range to 0

Author: HybridDog

technic/tools/mining_lasers.lua

@@ -4,43 +4,43 @@ local mining_lasers_list = {
 	{"2", 14, 200000, 2000},
 	{"3", 21, 650000, 3000},
 }
+local allow_entire_discharging = true
 
 local S = technic.getter
 
 minetest.register_craft({
-	output = 'technic:laser_mk1',
+	output = "technic:laser_mk1",
 	recipe = {
-		{'default:diamond', 'technic:brass_ingot',        'default:obsidian_glass'},
-		{'',                'technic:brass_ingot',        'technic:red_energy_crystal'},
-		{'',                '',                           'default:copper_ingot'},
+		{"default:diamond", "technic:brass_ingot",        "default:obsidian_glass"},
+		{"",                "technic:brass_ingot",        "technic:red_energy_crystal"},
+		{"",                "",                           "default:copper_ingot"},
 	}
 })
 minetest.register_craft({
-	output = 'technic:laser_mk2',
+	output = "technic:laser_mk2",
 	recipe = {
-		{'default:diamond', 'technic:carbon_steel_ingot', 'technic:laser_mk1'},
-		{'',                'technic:carbon_steel_ingot', 'technic:green_energy_crystal'},
-		{'',                '',                           'default:copper_ingot'},
+		{"default:diamond", "technic:carbon_steel_ingot", "technic:laser_mk1"},
+		{"",                "technic:carbon_steel_ingot", "technic:green_energy_crystal"},
+		{"",                "",                           "default:copper_ingot"},
 	}
 })
 minetest.register_craft({
-	output = 'technic:laser_mk3',
+	output = "technic:laser_mk3",
 	recipe = {
-		{'default:diamond', 'technic:carbon_steel_ingot', 'technic:laser_mk2'},
-		{'',                'technic:carbon_steel_ingot', 'technic:blue_energy_crystal'},
-		{'',                '',                           'default:copper_ingot'},
+		{"default:diamond", "technic:carbon_steel_ingot", "technic:laser_mk2"},
+		{"",                "technic:carbon_steel_ingot", "technic:blue_energy_crystal"},
+		{"",                "",                           "default:copper_ingot"},
 	}
 })
 
 local function laser_node(pos, node, player)
 	local def = minetest.registered_nodes[node.name]
-	if def and def.liquidtype ~= "none" then
+	if def.liquidtype ~= "none" and def.buildable_to then
 		minetest.remove_node(pos)
 		minetest.add_particle({
 			pos = pos,
-			velocity = {x=0, y=2, z=0},
-			acceleration = {x=0, y=-1, z=0},
-			expirationtime = 1.5,
+			velocity = {x = 0, y = 1.5 + math.random(), z = 0},
+			acceleration = {x = 0, y = -1, z = 0},
 			size = 6 + math.random() * 2,
 			texture = "smoke_puff.png^[transform" .. math.random(0, 7),
 		})
@@ -49,24 +49,28 @@ local function laser_node(pos, node, player)
 	minetest.node_dig(pos, node, player)
 end
 
-local no_destroy = {
-	["air"] = true,
-	["default:lava_source"] = true,
-	["default:lava_flowing"] = true,
-}
+local keep_node = {air = true}
+local function can_keep_node(name)
+	if keep_node[name] ~= nil then
+		return keep_node[name]
+	end
+	keep_node[name] = minetest.get_item_group(name, "hot") ~= 0
+	return keep_node[name]
+end
+
 local function laser_shoot(player, range, particle_texture, sound)
 	local player_pos = player:getpos()
 	local player_name = player:get_player_name()
 	local dir = player:get_look_dir()
 
 	local start_pos = vector.new(player_pos)
 	-- Adjust to head height
-	start_pos.y = start_pos.y + 1.6
+	start_pos.y = start_pos.y + (player:get_properties().eye_height or 1.625)
 	minetest.add_particle({
-		pos = startpos,
+		pos = start_pos,
 		velocity = dir,
 		acceleration = vector.multiply(dir, 50),
-		expirationtime = range / 11,
+		expirationtime = (math.sqrt(1 + 100 * (range + 0.4)) - 1) / 50,
 		size = 1,
 		texture = particle_texture .. "^[transform" .. math.random(0, 7),
 	})
@@ -76,42 +80,48 @@ local function laser_shoot(player, range, particle_texture, sound)
 			minetest.record_protection_violation(pos, player_name)
 			break
 		end
-		local node = minetest.get_node_or_nil(pos)
-		if not node then
+		local node = minetest.get_node(pos)
+		if node.name == "ignore"
+				or not minetest.registered_nodes[node.name] then
 			break
 		end
-		if not no_destroy[node.name] then
+		if not can_keep_node(node.name) then
 			laser_node(pos, node, player)
 		end
 	end
 end
 
-
 for _, m in pairs(mining_lasers_list) do
 	technic.register_power_tool("technic:laser_mk"..m[1], m[3])
 	minetest.register_tool("technic:laser_mk"..m[1], {
 		description = S("Mining Laser Mk%d"):format(m[1]),
 		inventory_image = "technic_mining_laser_mk"..m[1]..".png",
+		range = 0,
 		stack_max = 1,
 		wear_represents = "technic_RE_charge",
 		on_refill = technic.refill_RE_charge,
 		on_use = function(itemstack, user)
 			local meta = minetest.deserialize(itemstack:get_metadata())
-			if not meta or not meta.charge then
+			if not meta or not meta.charge or meta.charge == 0 then
 				return
 			end
 
-			-- If there's enough charge left, fire the laser
-			if meta.charge >= m[4] then
-				laser_shoot(user, m[2], "technic_laser_beam_mk"..m[1]..".png", "technic_laser_mk"..m[1])
-				if not technic.creative_mode then
-					meta.charge = meta.charge - m[4]
-					technic.set_RE_wear(itemstack, meta.charge, m[3])
-					itemstack:set_metadata(minetest.serialize(meta))
+			local range = m[2]
+			if meta.charge < m[4] then
+				if not allow_entire_discharging then
+					return
 				end
+				-- If charge is too low, give the laser a shorter range
+				range = range * meta.charge / m[4]
+			end
+			laser_shoot(user, range, "technic_laser_beam_mk" .. m[1] .. ".png",
+				"technic_laser_mk" .. m[1])
+			if not technic.creative_mode then
+				meta.charge = math.max(meta.charge - m[4], 0)
+				technic.set_RE_wear(itemstack, meta.charge, m[3])
+				itemstack:set_metadata(minetest.serialize(meta))
 			end
 			return itemstack
 		end,
 	})
 end
-