nethack-gwaa-kiwi/nethack
1
0
Fork 0
Code Pull Requests Activity

Implement selection addition and difference

Browse Source 
Selection difference is something I have found myself wanting a lot when
working on levels, and have had to defer to a clunkier xor-then-and
approach. This commit implements the TODO-ed addition and subtraction
operators on two sets.

I don't see how the addition operator would be any different from
logical or, so it just calls l_selection_or rather than implement a new
function.
This commit is contained in:
copperwater
2022-03-14 11:14:46 -04:00
committed by Pasi Kallinen
parent a61a97856b
commit b4a460f81b
2 changed files with 41 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
doc/lua.adoc
View File

@@ -793,11 +793,13 @@ Example:
=== Logical or
Choose locations that are selected in either or both selections.
Choose locations that are selected in either or both selections. The
addition operator also does this.
Example:
local sel = selection.area(4,5, 40,10) | selection.rect(7,8, 60,14);
local sel = selection.area(4,5, 40,10) + selection.rect(7,8, 60,14);
=== Logical xor
@@ -809,6 +811,15 @@ Example:
local sel = selection.area(4,5, 40,10) ~ selection.rect(7,8, 60,14);
=== Logical difference
Choose locations in the first selection but not in the second selection.
Example:
local sel = selection.area(10,10, 20,20) - selection.area(14,14, 17,17);
=== area
Alias for <<_fillrect>>.