From 90bd793227f02c83c20286091ab363832c99ea52 Mon Sep 17 00:00:00 2001
From: 1n17 <59138068+1n17@users.noreply.github.com>
Date: Mon, 20 Jan 2020 07:49:44 +0100
Subject: [PATCH] [MOD] INT Based Learning (#37075)

---
 data/json/game_balance.json             |  7 +++++++
 data/mods/intbasedlearning/modinfo.json | 22 ++++++++++++++++++++++
 src/avatar.cpp                          |  4 ++++
 src/player.cpp                          |  3 +++
 4 files changed, 36 insertions(+)
 create mode 100644 data/mods/intbasedlearning/modinfo.json

diff --git a/data/json/game_balance.json b/data/json/game_balance.json
index c75869e9be708..df8a8a0226738 100644
--- a/data/json/game_balance.json
+++ b/data/json/game_balance.json
@@ -194,5 +194,12 @@
     "info": "Stats through Kills.  A mod that allows your stats to increase by killing zombies.",
     "stype": "bool",
     "value": false
+  },
+  {
+    "type": "EXTERNAL_OPTION",
+    "name": "INT_BASED_LEARNING",
+    "info": "INT Based Learning mod. Enables rebalance of practice and reading gains.",
+    "stype": "bool",
+    "value": false
   }
 ]
diff --git a/data/mods/intbasedlearning/modinfo.json b/data/mods/intbasedlearning/modinfo.json
new file mode 100644
index 0000000000000..7a1bb54a30d38
--- /dev/null
+++ b/data/mods/intbasedlearning/modinfo.json
@@ -0,0 +1,22 @@
+[
+  {
+    "type": "MOD_INFO",
+    "ident": "intbasedlearning",
+    "name": "INT Based Learning",
+    "authors": [ "1n17" ],
+    "maintainers": [ "1n17" ],
+    "description": "Learning through practice and reading is highly dependent on INT and focus. Respective traits are disabled.",
+    "category": "rebalance",
+    "dependencies": [ "dda" ]
+  },
+  {
+    "type": "EXTERNAL_OPTION",
+    "name": "INT_BASED_LEARNING",
+    "stype": "bool",
+    "value": true
+  },
+  {
+    "type": "TRAIT_BLACKLIST",
+    "traits": [ "SLOWLEARNER", "FASTLEARNER" ]
+  }
+]
diff --git a/src/avatar.cpp b/src/avatar.cpp
index dd71f8450ea96..16f13562d92e1 100644
--- a/src/avatar.cpp
+++ b/src/avatar.cpp
@@ -776,6 +776,10 @@ void avatar::do_read( item &book )
             if( has_active_bionic( bio_memory ) ) {
                 min_ex += 2;
             }
+            if( get_option<bool>( "INT_BASED_LEARNING" ) ) {
+                min_ex = adjust_for_focus( min_ex );
+                max_ex = adjust_for_focus( max_ex );
+            }
             if( max_ex < 2 ) {
                 max_ex = 2;
             }
diff --git a/src/player.cpp b/src/player.cpp
index 47ffe2eb7a81f..3603aba2ecf46 100644
--- a/src/player.cpp
+++ b/src/player.cpp
@@ -5575,6 +5575,9 @@ int player::adjust_for_focus( int amount ) const
     if( has_trait( trait_SLOWLEARNER ) ) {
         effective_focus -= 15;
     }
+    if( get_option<bool>( "INT_BASED_LEARNING" ) ) {
+        effective_focus += ( get_int_base() - 8 ) * 5;
+    }
     double tmp = amount * ( effective_focus / 100.0 );
     return roll_remainder( tmp );
 }