Characters rotate to who they're talking to

main.c

@@ -1711,6 +1711,10 @@ void cause_action_side_effects(Entity *from, Action a)
 		assert(to);
 	}
 
+	if(to)
+	{
+		from->target_rotation = AngleOfV2(SubV2(to->pos, from->pos));
+	}
 
 	if(a.kind == ACT_join)
 	{
@@ -5911,6 +5915,8 @@ void frame(void)
 							if(it->dialog_fade > 0.0f)
 								it->dialog_fade -= dt/DIALOG_FADE_TIME;
 
+							it->rotation = lerp_angle(it->rotation, unwarped_dt*8.0f, it->target_rotation);
+
 							if (it->gen_request_id != 0 && !gs.stopped_time)
 							{
 								assert(it->gen_request_id > 0);

makeprompt.h

@@ -229,6 +229,7 @@ typedef struct Entity
 	// npcs
 	NpcKind npc_kind;
 	EntityRef joined;
+	float target_rotation; // turns towards this angle in conversation
 	bool being_hovered;
 	bool perceptions_dirty;
 	float dialog_fade;