commit df957e1e1d77a28035457679b1b067104bee57aa
Author: /dev/humancontroller <devhc@example.com>
Date:   Fri May 13 17:55:48 2011 +0200

    functionality for players to use trigger_multiples by holding +buttons

diff --git a/src/game/g_local.h b/src/game/g_local.h
index 72b04c9..585d4d4 100644
--- a/src/game/g_local.h
+++ b/src/game/g_local.h
@@ -244,6 +244,7 @@ struct gentity_s
   int               usesBuildPointZone;             // does it use a zone?
 
   int               resetValue;
+  int               buttonMask;
 };
 
 typedef enum
diff --git a/src/game/g_trigger.c b/src/game/g_trigger.c
index fa215bf..79bca29 100644
--- a/src/game/g_trigger.c
+++ b/src/game/g_trigger.c
@@ -91,10 +91,12 @@ void Use_Multi( gentity_t *ent, gentity_t *other, gentity_t *activator )
 
 void Touch_Multi( gentity_t *self, gentity_t *other, trace_t *trace )
 {
-  if( !other->client && other->s.eType != ET_BUILDABLE )
-    return;
-
-  multi_trigger( self, other );
+  if( ( other->client && ( self->buttonMask == -1 ||
+        ( other->client->buttons & self->buttonMask ) ) ) ||
+      ( other->s.eType == ET_BUILDABLE && self->buttonMask == -1 ) )
+  {
+    multi_trigger( self, other );
+  }
 }
 
 /*QUAKED trigger_multiple (.5 .5 .5) ?
@@ -108,6 +110,7 @@ void SP_trigger_multiple( gentity_t *ent )
 {
   G_SpawnFloat( "wait", "0.5", &ent->wait );
   G_SpawnFloat( "random", "0", &ent->random );
+  G_SpawnInt( "buttonmask", "-1", &ent->buttonMask );
 
   if( ent->random >= ent->wait && ent->wait >= 0 )
   {