From 9dc3cc532820349a0f0e087afb60132927fd3411 Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Sun, 10 Nov 2013 01:48:41 +0000
Subject: Corrected a bug which prevented the patrol profile from being set
 correctly, corrected a bug where 'give ship' would forget the last spawn,
 have NPC ships fire on nearby enemies, made patrol leaders hunt nearby
 enemies.

---
 src/game/base/npc.cc | 90 ++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 77 insertions(+), 13 deletions(-)

(limited to 'src/game/base/npc.cc')

diff --git a/src/game/base/npc.cc b/src/game/base/npc.cc
index fa0ef44..992ba6c 100644
--- a/src/game/base/npc.cc
+++ b/src/game/base/npc.cc
@@ -4,6 +4,8 @@
    the terms of the GNU General Public License version 2
 */
 
+#include "core/range.h"
+
 #include "base/npc.h"
 #include "base/game.h"
 #include "base/patrol.h"
@@ -99,6 +101,79 @@ void NPC::set_patrol(Patrol *patrol)
 	npc_patrol = patrol;
 }
 
+Ship *NPC::target_closest_enemy()
+{
+	// scan for enemies
+	Ship *current_enemy = 0;
+	float current_distance = 0.0f;
+	
+
+	for (core::Zone::Content::iterator zit = zone()->content().begin(); zit != zone()->content().end(); ++zit) {
+		if (((*zit)->moduletype() == ship_enttype) && ((*zit) != this)) {
+			Ship *ship = static_cast<Ship *>((*zit));
+			
+			if ((ship->state() != Normal) && (ship->state() != ImpulseInitiate) && (ship->state() != Impulse)) {
+				continue;
+			}
+			
+			const float d = math::distance(location(), ship->location());
+			const float r = radius() + ship->radius();
+			
+			// too far
+			if (d > r + core::range::fxdistance * 2.0f) {
+				continue;
+			}
+			
+			// further than current target
+			if ((current_distance > 0.0f) && (d > current_distance)) {
+				continue;
+			}
+			
+			float reputation = 0.0f;
+			if (ship->owner()) {
+				// check owner reputation for the faction the NPC belongs to
+				reputation = ship->owner()->reputation(faction());
+				
+			} else if (faction() && (faction()->type() == Faction::infotype())) {
+				//check NPC faction reputation for the other ships's faction
+				reputation = static_cast<const Faction *>(faction())->reputation(ship->faction());
+			}
+			
+			// reputation threshold to get attacked
+			if (reputation >= -50.0f) {
+				continue;
+			}
+			
+			// reputation threshold to get hunted
+			if (d > core::range::fxdistance + r) {
+				
+				if ((!ship->owner()) || (reputation > -100.0f)) {
+					continue;;
+				}
+			}
+			
+			current_enemy = ship;
+			current_distance = d;
+		}
+	}
+	
+	// FIXME calculate weaposn range, arbitrarily set to 10 km
+	const float weapons_range = COMBAT_DISTANCE;
+	
+	// set aim
+	if ((state() == Normal) && current_enemy && (current_distance <= weapons_range)) {
+		// activate weapons
+		set_target_controlflag(core::EntityControlable::ControlFlagFire);
+		// rudimentary aim currention
+		target_aim.assign(current_enemy->location() + current_enemy->axis().forward() * (current_enemy->radius() * 0.25f) );
+	} else {
+		// deactivate weapons
+		unset_target_controlflag(core::EntityControlable::ControlFlagFire);
+	}
+	
+	return current_enemy;
+}
+
 void NPC::frame(const unsigned long elapsed)
 {
 	if (state() == core::Entity::Destroyed) {
@@ -107,13 +182,11 @@ void NPC::frame(const unsigned long elapsed)
 			npc_destroyed_timestamp = core::game()->time();
 			
 		} else if (npc_destroyed_timestamp + 10.0f < core::game()->time()) {
-		// stay alive for 10 more seconds while explosion particles are drawn
-		
+			// stay alive for 10 more seconds while explosion particles are drawn		
 			die();
 		}
 
 	} else {
-		
 		// TODO pilot magic and mood witchcraft		
 		if (leader()) {
 			
@@ -154,7 +227,6 @@ void NPC::frame(const unsigned long elapsed)
 				} else {
 					
 					if (state() == core::Entity::Docked) {
-						
 						// FIXME check launch conditions when docked at another player's ship
 						launch();
 						
@@ -166,14 +238,7 @@ void NPC::frame(const unsigned long elapsed)
 						unset_autopilot_flag(Ship::AutoPilotDock);
 						set_autopilot_flag(Ship::AutoPilotFormation);
 						
-						/*
-						if (leader()->has_target_controlflag(core::EntityControlable::ControlFlagFire)) {
-							set_target_controlflag(core::EntityControlable::ControlFlagFire);
-							target_aim.assign(leader()->aim());
-						} else {
-							unset_target_controlflag(core::EntityControlable::ControlFlagFire);
-						}
-						*/
+						target_closest_enemy();
 					}
 				}
 				
@@ -218,7 +283,6 @@ void NPC::frame(const unsigned long elapsed)
 				target_thrust = 0;
 				
 				if (state() == core::Entity::Impulse) {
-
 					func_impulse();
 				}
 
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