I'm trying to put together a simple game in which the player must avoid obstacles. I'm trying to put together a table that holds all the obstacles, with their x/y positions, as tables within tables, so that the table structure looks like this:
ActorsTable *Wall1 1.Wall1's X 2.Wall1's Y *Wall2 1.Wall2's X 2.Wall2's Y |
However, when I want to get--for instance--ActorsTable.Wall1.X, I get an error:
"ATTEMPT TO INDEX FIELD '?' (A NIL VALUE)". |
I know that this means something's not initialized. But what exactly hasn't been initialized?
For reference, the code so far. I'm working on making a series of walls for the player to fly past. Error occurs at line 86.
http://pastebin.com/4k7DBv2X
Gerard_02 :: When you use:
"i" is not an index, but the object in the collection itself. |
Well, that makes the whole thing a lot clearer. No wonder I was getting errors, I was trying to use the content of the table as an index to access the table!
akilism :: you can also use
then you can keep your walls as one set of tables and other types of objects as another. |
That could shave some code off my _update and _draw functions. Definitely gonna try it.
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