Make nuclear reactor core harder to break

With breaking an active reactor core now causing instant meltdown, having
it breakable by hand is too hazardous.  Change it to match steel block,
which constitutes the main part of the rest of the reactor structure.

diff --git a/technic/machines/HV/nuclear_reactor.lua b/technic/machines/HV/nuclear_reactor.lua
index c4587bbae55c56ed5d54c049f6c4251710ebef61..b57faa744e578e3dab822660a4544cf4fe2aaed0 100644 (file)
--- a/technic/machines/HV/nuclear_reactor.lua
+++ b/technic/machines/HV/nuclear_reactor.lua
@@ -259,7 +259,7 @@ minetest.register_node("technic:hv_nuclear_reactor_core", {
        tiles = {"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
                 "technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
                 "technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png"},
-       groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2, technic_machine=1},
+       groups = {cracky=1, technic_machine=1},
        legacy_facedir_simple = true,
        sounds = default.node_sound_wood_defaults(),
        drawtype="nodebox",
@@ -293,7 +293,7 @@ minetest.register_node("technic:hv_nuclear_reactor_core_active", {
        tiles = {"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
                 "technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
                 "technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png"},
-       groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2, technic_machine=1, radioactive=7, not_in_creative_inventory=1},
+       groups = {cracky=1, technic_machine=1, radioactive=7, not_in_creative_inventory=1},
        legacy_facedir_simple = true,
        sounds = default.node_sound_wood_defaults(),
        drop="technic:hv_nuclear_reactor_core",