From 4b7005f8560b565c28b940ad257756d4ed4f2a54 Mon Sep 17 00:00:00 2001
From: alexbobp <alexbobp@gmail.com>
Date: Mon, 29 Apr 2024 16:51:32 -0500
Subject: [PATCH] add pseudoexponential decay to last-move smoke intensity (so
 it doesn't stay intense indefinitely after a large capture)

---
 abm.lua | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/abm.lua b/abm.lua
index 42d9cc1..c5ec8ad 100644
--- a/abm.lua
+++ b/abm.lua
@@ -1,6 +1,6 @@
 -- LUALOCALS < ---------------------------------------------------------
-local include, nodecore
-= include, nodecore
+local include, nodecore, math
+= include, nodecore, math
 -- LUALOCALS > ---------------------------------------------------------
 
 minetest.register_abm({
@@ -10,6 +10,12 @@ minetest.register_abm({
                 nodenames = {"group:go_stone"},
                 action = function(pos, node)
                     if not (node.param2 == 0) then
+                        -- if smoke level is higher than 1, it can decay (lazy pseudoexponential decay)
+                        if math.random() < (0.01 * (node.param2 - 1)) then
+                            node.param2 = node.param2 - 1
+                            minetest.swap_node(pos, node)
+                        end
+
                         nodecore.smokefx(pos, 60, node.param2)
                     end
                 end