Fix rare(?) lua null access error

EleutherAI · Sep 3, 2023 · dcd2264 · dcd2264
1 parent deb7379
commit dcd2264
Showing 1 changed file with 32 additions and 30 deletions.
diff --git a/clientmods/treechop_shaped_v0/init.lua b/clientmods/treechop_shaped_v0/init.lua
@@ -16,40 +16,42 @@ minetest.register_on_dignode(function(pos, node)
 end)
 
 minetest.register_globalstep(function(dtime)
- -- reward looking at trees
- local player_pos = core.localplayer:get_pos()
- local cam_pos = core.camera:get_pos()
- local pos2 = vector.add(cam_pos, vector.multiply(core.camera:get_look_dir(), 30))
- local rc = core.raycast(cam_pos, pos2, false, false)
- local thing = rc:next()
- while thing do
- if thing.type == "node" then
- local pos = thing.under
- local node = minetest.get_node_or_nil(pos)
- local node_name = node.name
- if string.find(node_name, "tree") then
- --minetest.debug("Looking at a tree!")
- REWARD = REWARD + 0.01
+ if core.localplayer then
+ -- reward looking at trees
+ local player_pos = core.localplayer:get_pos()
+ local cam_pos = core.camera:get_pos()
+ local pos2 = vector.add(cam_pos, vector.multiply(core.camera:get_look_dir(), 30))
+ local rc = core.raycast(cam_pos, pos2, false, false)
+ local thing = rc:next()
+ while thing do
+ if thing.type == "node" then
+ local pos = thing.under
+ local node = minetest.get_node_or_nil(pos)
+ local node_name = node.name
+ if string.find(node_name, "tree") then
+ --minetest.debug("Looking at a tree!")
+ REWARD = REWARD + 0.01
+ end
  end
+ thing = rc:next()
  end
- thing = rc:next()
- end
 
- if MAX_TREE_DISTANCE > 0 then
- -- rewards being closer to tree nodes
- local tree_pos = minetest.find_node_near(
- player_pos,
- MAX_TREE_DISTANCE,
- -- TODO why does group:tree not work for all tree nodes?
- {"group:tree", "default:tree", "default:acacia_tree", "default:jungle_tree", "default:pine_tree", "default:aspen_tree"},
- true
- )
- local dist = MAX_TREE_DISTANCE 
- if tree_pos ~= nil then
- --minetest.debug("Tree within range!")
- dist = vector.distance(tree_pos, player_pos)
+ if MAX_TREE_DISTANCE > 0 then
+ -- rewards being closer to tree nodes
+ local tree_pos = minetest.find_node_near(
+ player_pos,
+ MAX_TREE_DISTANCE,
+ -- TODO why does group:tree not work for all tree nodes?
+ {"group:tree", "default:tree", "default:acacia_tree", "default:jungle_tree", "default:pine_tree", "default:aspen_tree"},
+ true
+ )
+ local dist = MAX_TREE_DISTANCE 
+ if tree_pos ~= nil then
+ --minetest.debug("Tree within range!")
+ dist = vector.distance(tree_pos, player_pos)
+ end
+ REWARD = REWARD - 0.01 * dist
  end
- REWARD = REWARD - 0.01 * dist
  end
 end)