From 7afa635b4728e504ca6ec3bf64223efe0f991f67 Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Mon, 18 Nov 2013 18:44:16 +0000
Subject: Have the autopilot disable impulse druve at 10km from a planet,
 preventing AI ships to seemingly dock at impulse speed.

---
 src/game/base/ship.cc | 56 ++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 42 insertions(+), 14 deletions(-)

diff --git a/src/game/base/ship.cc b/src/game/base/ship.cc
index 7fae769..03c44aa 100644
--- a/src/game/base/ship.cc
+++ b/src/game/base/ship.cc
@@ -1272,13 +1272,28 @@ void Ship::frame_autopilot_goto(const unsigned long elapsed, core::Entity *targe
 	target_roll = 0.0f;
 
 	// impulse or thruster
-	if (distance > r + PLANET_SAFE_DISTANCE) {
+	if (distance > r + 2.0f * PLANET_SAFE_DISTANCE) {
 		
 		if (state() == core::Entity::Normal) {
-			// enable impulse drive
+			// far away, enable impulse drive
 			func_impulse();
 		}
 		
+	} else if (distance > r + PLANET_SAFE_DISTANCE) {
+		
+		if (autopilot_target()->moduletype() == planet_enttype) {
+			if ((state() == core::Entity::Impulse) || (state() == core::Entity::ImpulseInitiate)) {
+				// near planet, disable impulse drive
+				func_impulse();
+			}
+		
+		} else {
+			if (state() == core::Entity::Normal) {
+				// still far enough, enable impulse drive
+				func_impulse();
+			}
+		}
+		
 	} else {
 		
 		if (target->type() == core::Entity::Controlable) {
@@ -1287,8 +1302,8 @@ void Ship::frame_autopilot_goto(const unsigned long elapsed, core::Entity *targe
 		
 			if (state() == core::Entity::Impulse) {
 				
-				if (controlable->state() != core::Entity::Impulse) {
-					// disbable impulse drive
+				if (controlable->state() == core::Entity::Normal) {
+					// disable impulse drive
 					func_impulse();
 				}
 				
@@ -1302,22 +1317,35 @@ void Ship::frame_autopilot_goto(const unsigned long elapsed, core::Entity *targe
 			
 		} else {
 			
-			if (state() == core::Entity::Impulse) {
+			if ((state() == core::Entity::Impulse) || (state() == core::Entity::ImpulseInitiate)){
 				func_impulse();
 			}
 		}
 	}
 	
-	// thruster
-	if (distance > 4.0f * r) {
-		target_thrust = 1.0f;
-		
-	} else if (distance > r ) {
-		target_thrust = math::max(0.1f, (distance - r ) / (3.0f * r));
-		
+	if (autopilot_target()->moduletype() == planet_enttype) {
+		// thrust rules for planet approaches
+		if (distance > r + 2.0f * PLANET_SAFE_DISTANCE) {
+			target_thrust = 1.0f;
+					
+		} else if (distance > r + PLANET_SAFE_DISTANCE) {
+			target_thrust = math::max(0.1f, (distance - r - PLANET_SAFE_DISTANCE)  / PLANET_SAFE_DISTANCE);
+		} else {
+			target_thrust = 0.0f;
+			// TODO autolevel
+		}		
 	} else {
-		target_thrust = 0.0f;
-		// TODO autolevel
+		// thruster
+		if (distance > 4.0f * r) {
+			target_thrust = 1.0f;
+			
+		} else if (distance > r ) {
+			target_thrust = math::max(0.1f, (distance - r ) / (3.0f * r));
+			
+		} else {
+			target_thrust = 0.0f;
+			// TODO autolevel
+		}
 	}
 }
 
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