From 7717ee18c92880b110491980c29f30ef00e1cf55 Mon Sep 17 00:00:00 2001
From: Maleclypse <54345792+Maleclypse@users.noreply.github.com>
Date: Fri, 4 Dec 2020 19:04:22 -0600
Subject: [PATCH] Adding a NO_SHOOT terrain Flag and example of use (#45730)

---
 data/mods/Magiclysm/terrain.json | 2 +-
 src/map.cpp                      | 9 ++++++---
 src/mapdata.cpp                  | 1 +
 src/mapdata.h                    | 1 +
 4 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/data/mods/Magiclysm/terrain.json b/data/mods/Magiclysm/terrain.json
index 61db387ca61df..b41dbaf4dff7c 100644
--- a/data/mods/Magiclysm/terrain.json
+++ b/data/mods/Magiclysm/terrain.json
@@ -72,7 +72,7 @@
     "color": "light_cyan",
     "move_cost": 0,
     "roof": "t_flat_roof",
-    "flags": [ "TRANSPARENT", "ALARMED", "NOITEM", "WALL", "NO_SCENT", "AUTO_WALL_SYMBOL", "BLOCK_WIND" ],
+    "flags": [ "TRANSPARENT", "ALARMED", "NOITEM", "WALL", "NO_SCENT", "AUTO_WALL_SYMBOL", "BLOCK_WIND", "NO_SHOOT" ],
     "bash": {
       "str_min": 200,
       "str_max": 600,
diff --git a/src/map.cpp b/src/map.cpp
index d76543d6e1fd2..e96eaa22fac79 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -3668,9 +3668,12 @@ void map::shoot( const tripoint &p, projectile &proj, const bool hit_items )
     };
 
     ter_id terrain = ter( p );
-    if( terrain == t_wall_wood_broken ||
-        terrain == t_wall_log_broken ||
-        terrain == t_door_b ) {
+    if( terrain->has_flag( TFLAG_NO_SHOOT ) ) {
+        dam = 0.0f;
+        add_msg( _( "The shot is stopped by the %s" ), terrain->name() );
+    } else if( terrain == t_wall_wood_broken ||
+               terrain == t_wall_log_broken ||
+               terrain == t_door_b ) {
         if( hit_items || one_in( 8 ) ) { // 1 in 8 chance of hitting the door
             dam -= rng( 20, 40 );
             if( dam > 0 ) {
diff --git a/src/mapdata.cpp b/src/mapdata.cpp
index 2b4aca9a45468..01108afb80d59 100644
--- a/src/mapdata.cpp
+++ b/src/mapdata.cpp
@@ -158,6 +158,7 @@ static const std::unordered_map<std::string, ter_bitflags> ter_bitflags_map = {
         { "NO_SIGHT",                 TFLAG_NO_SIGHT },       // Sight reduced to 1 on this tile
         { "FLAMMABLE_ASH",            TFLAG_FLAMMABLE_ASH },  // oh hey fire. again.
         { "WALL",                     TFLAG_WALL },           // connects to other walls
+        { "NO_SHOOT",                 TFLAG_NO_SHOOT },       // terrain cannot be damaged by ranged attacks
         { "NO_SCENT",                 TFLAG_NO_SCENT },       // cannot have scent values, which prevents scent diffusion through this tile
         { "DEEP_WATER",               TFLAG_DEEP_WATER },     // Deep enough to submerge things
         { "SHALLOW_WATER",            TFLAG_SHALLOW_WATER },  // Water, but not deep enough to submerge the player
diff --git a/src/mapdata.h b/src/mapdata.h
index b22ccf9f3ea66..d9cb445aab855 100644
--- a/src/mapdata.h
+++ b/src/mapdata.h
@@ -194,6 +194,7 @@ enum ter_bitflags : int {
     TFLAG_WALL,
     TFLAG_DEEP_WATER,
     TFLAG_SHALLOW_WATER,
+    TFLAG_NO_SHOOT,
     TFLAG_CURRENT,
     TFLAG_HARVESTED,
     TFLAG_PERMEABLE,