[Add] Start of ship ai.

src/Makefile.am

@@ -10,7 +10,7 @@ include_HEADERS = body.h frame.h generic_system_view.h glfreetype.h gui_button.h
 		planet.h player.h dynamic_body.h sector.h sector_view.h ship_cpanel.h ship.h space.h star.h star_system.h system_info_view.h \
 		system_view.h vector3.h view.h world_view.h date.h space_station.h space_station_view.h model_body.h gui_iselectable.h \
 		ship_type.h object.h info_view.h model_coll_mesh_data.h object_viewer_view.h fixed.h custom_starsystems.h gameconsts.h \
-		aabb.h serializer.h sfx.h
+		aabb.h serializer.h sfx.h ai_ship.h
 
 libgui_a_SOURCES = gui_button.cpp gui.cpp gui_fixed.cpp gui_screen.cpp gui_label.cpp gui_toggle_button.cpp gui_radio_button.cpp \
 									 gui_radio_group.cpp gui_image_button.cpp gui_image.cpp gui_image_radio_button.cpp gui_multi_state_image_button.cpp gui_widget.cpp \
@@ -20,7 +20,7 @@ Lephisto3D_SOURCES	= main.cpp glfreetype.cpp body.cpp space.cpp ship.cpp player.
 											star.cpp frame.cpp ship_cpanel.cpp sector_view.cpp mtrand.cpp world_view.cpp system_view.cpp \
 											star_system.cpp sector.cpp system_info_view.cpp generic_system_view.cpp date.cpp space_station.cpp \
 											space_station_view.cpp model_body.cpp ship_type.cpp info_view.cpp model_coll_mesh_data.cpp \
-											object_viewer_view.cpp custom_starsystems.cpp serializer.cpp sfx.cpp
+											object_viewer_view.cpp custom_starsystems.cpp serializer.cpp sfx.cpp ai_ship.cpp
 Lephisto3D_LDADD = sbre/libsbre.a collider/libcollider.a libgui.a
 
 ModelViewer_SOURCES = sbre_viewer.cpp glfreetype.cpp

src/ai_ship.cpp

@@ -0,0 +1,77 @@
+#include "libs.h"
+#include "ai_ship.h"
+#include "serializer.h"
+#include "l3d.h"
+
+bool AIShip::DoKill(const Ship* enemy) {
+  /* Need to deal with frames, large distances, and success! */
+  if(GetFrame() == enemy->GetFrame()) {
+    vector3d dir = vector3d::Normalize(enemy->GetPosition() - GetPosition());
+    AIFaceDirection(dir);
+  }
+  return false;
+}
+
+void AIShip::TimeStepUpdate(const float timeStep) {
+  bool done = false;
+
+  if(m_todo.size() != 0) {
+    Instruction& inst = m_todo.front();
+    switch(inst.cmd) {
+      case DO_KILL:
+        done = DoKill(static_cast<const Ship*>(inst.arg));
+        break;
+      case DO_NOTHING: done = true; break;
+    }
+  }
+  if(done) {
+    printf("AI '%s' successfully executed %d:'%s'\n", GetLabel().c_str(), m_todo.front().cmd,
+        static_cast<Ship*>(m_todo.front().arg)->GetLabel().c_str());
+    m_todo.pop_front();
+  }
+
+  Ship::TimeStepUpdate(timeStep);
+}
+
+void AIShip::Save(void) {
+  using namespace Serializer::Write;
+  Ship::Save();
+  wr_int(m_todo.size());
+  for(std::list<Instruction>::iterator i = m_todo.begin(); i != m_todo.end(); ++i) {
+    wr_int((int)(*i).cmd);
+    switch((*i).cmd) {
+      case DO_KILL:
+        wr_int(Serializer::LookupBody(static_cast<Ship*>((*i).arg)));
+      case DO_NOTHING: wr_int(0); break;
+    }
+  }
+}
+
+void AIShip::Load(void) {
+  using namespace Serializer::Read;
+  Ship::Load();
+  int num = rd_int();
+  while(num-- > 0) {
+    Command c= (Command)rd_int();
+    void* arg = (void*)rd_int();
+    printf("COMMAND %d:%p\n", c, arg);
+    m_todo.push_back(Instruction(c, arg));
+  }
+}
+
+void AIShip::PostLoadFixup(void) {
+  Ship::PostLoadFixup();
+  for(std::list<Instruction>::iterator i = m_todo.begin(); i != m_todo.end(); ++i) {
+    switch((*i).cmd) {
+      case DO_KILL:
+        (*i).arg = Serializer::LookupBody((size_t)(*i).arg);
+        break;
+      case DO_NOTHING: break;
+    }
+  }
+}
+
+void AIShip::Instruct(enum Command cmd, void* arg) {
+  m_todo.push_back(Instruction(cmd, arg));
+}
+

src/ai_ship.h

@@ -0,0 +1,32 @@
+#pragma once
+#include <list>
+#include "ship.h"
+#include "ship_type.h"
+
+class AIShip: public Ship {
+public:
+  OBJDEF(AIShip, Ship, AISHIP);
+  AIShip(ShipType::Type shipType): Ship(shipType) { }
+  AIShip(void): Ship() { }
+  void TimeStepUpdate(const float timeStep);
+
+  enum Command { DO_NOTHING, DO_KILL };
+  void Instruct(enum Command, void* arg);
+  void ClearInstructions(void) { m_todo.clear(); }
+  virtual void PostLoadFixup(void);
+
+protected:
+  virtual void Save(void);
+  virtual void Load(void);
+private:
+  bool DoKill(const Ship*);
+  class Instruction {
+  public:
+    Command cmd;
+    void* arg;
+    Instruction(Command c, void* a): cmd(c), arg(a) { }
+  };
+
+  std::list<Instruction> m_todo;
+};
+

src/body.cpp

@@ -6,6 +6,7 @@
 #include "planet.h"
 #include "space_station.h"
 #include "ship.h"
+#include "ai_ship.h"
 #include "player.h"
 #include "sfx.h"
 
@@ -48,6 +49,7 @@ void Body::Serialize(void) {
     case Object::PLANET:
     case Object::SPACESTATION:
     case Object::SHIP:
+    case Object::AISHIP:
     case Object::PLAYER:
     case Object::SFX:
       Save();
@@ -74,6 +76,8 @@ Body* Body::Unserialize(void) {
       b = new SpaceStation(); break;
     case Object::SHIP:
       b = new Ship(); break;
+    case Object::AISHIP:
+      b = new AIShip(); break;
     case Object::PLAYER:
       b = new Player(); break;
     case Object::SFX:

src/main.cpp

@@ -19,6 +19,7 @@
 #include "space_station_view.h"
 #include "info_view.h"
 #include "serializer.h"
+#include "ai_ship.h"
 
 float             L3D::timeAccel = 1.0f;
 int               L3D::scrWidth;
@@ -201,11 +202,12 @@ void L3D::HandleEvents(void) {
           station->SetPosition(L3D::player->GetPosition()+5000.0*dir);
           Space::AddBody(station);
         } else {
-          Ship* body = new Ship(ShipType::LADYBIRD);
-          body->SetLabel("A Friend");
-          body->SetFrame(L3D::player->GetFrame());
-          body->SetPosition(L3D::player->GetPosition()+1000.0*dir);
-          Space::AddBody(body);
+          AIShip* ship = new AIShip(ShipType::LADYBIRD);
+          ship->Instruct(AIShip::DO_KILL, L3D::player);
+          ship->SetLabel("A friend?");
+          ship->SetFrame(L3D::player->GetFrame());
+          ship->SetPosition(L3D::player->GetPosition()+100.0*dir);
+          Space::AddBody(ship);
         }
       }
 #endif

src/object.h

@@ -2,7 +2,7 @@
 
 class Object {
 public:
-  enum Type { OBJECT, BODY, MODELBODY, DYNAMICBODY, SHIP, PLAYER, SPACESTATION, PLANET, STAR, SFX };
+  enum Type { OBJECT, BODY, MODELBODY, DYNAMICBODY, SHIP, PLAYER, SPACESTATION, PLANET, STAR, SFX, AISHIP };
   virtual Type GetType(void) { return OBJECT; }
   virtual bool IsType(Type c) { return GetType() == c; }
 };

src/serializer.h

@@ -1,6 +1,7 @@
 #pragma once
 #include <vector>
 #include "libs.h"
+#include "star_system.h"
 
 #define SAVEFILE_VERSION 1
 

src/ship.cpp

@@ -397,6 +397,28 @@ void Ship::SetCombatTarget(Body* const target) {
   L3D::worldView->UpdateCommsOptions();
 }
 
+/* Orient so our -ve z axis == dir. ie.. So that direction points forwards. */
+void Ship::AIFaceDirection(const vector3d& dir) {
+  matrix4x4d rot;
+  GetRotMatrix(rot);
+  rot = rot.InverseOf();
+  const vector3d zaxis = vector3d(-rot[2], -rot[6], -rot[10]);
+  vector3d rotaxis = vector3d::Cross(zaxis, dir);
+  const float dot = vector3d::Dot(dir, zaxis);
+  /* If facing > 90 degrees away then max turn rate.. */
+  if(dot < 0) rotaxis.Normalize();
+  rotaxis = rot*rotaxis;
+  ClearThrusterState();
+  /* We still must apply rotation damping. */
+  rotaxis -= CalcRotDamping();
+  SetAngThrusterState(0, rotaxis.x);
+  SetAngThrusterState(1, rotaxis.y);
+  SetAngThrusterState(2, rotaxis.z);
+  if(dot > 0) SetThrusterState(ShipType::THRUSTER_REAR, 1.0);
+  if(dot > 0.95f) SetGunState(0,1);
+  else SetGunState(0,0);
+}
+
 bool Ship::IsFiringLasers(void) {
   for(int i = 0; i < ShipType::GUNMOUNT_MAX; i++) {
     if(m_gunState[i]) return true;

src/ship.h

@@ -46,6 +46,7 @@ public:
   enum FlightState { FLYING, LANDED };
   FlightState GetFlightState(void) const { return m_flightState; }
   float GetWheelState(void) const { return m_wheelState; }
+  void AIFaceDirection(const vector3d& dir);
 
   EquipSet m_equipment;
 

src/ship_type.cpp

@@ -21,8 +21,8 @@ const ShipType ShipType::types[] = {
      * I should outsource name choosing, or this happens..
      */
     "Ladybird Starfighter",
-    13,
-    { 1e7, -1e7, 1e6, -1e6, -1e6, 1e6 },
+    62,
+    { 1e8, -1e8, 1e8, -1e8, -1e8, 1e8 },
     1e7,
     {
       { vector3f(0, -0.5, 0), vector3f(0, 0, -1) },