Patch by Matt McCutchen to prevent division by zero when Tux spawns exactly at a...
[supertux.git] / src / badguy / willowisp.cpp
index 00f0c74..db467e7 100644 (file)
@@ -1,5 +1,5 @@
-//  $Id: willowisp.cpp 3117 2006-03-25 17:19:54Z sommer $
-// 
+//  $Id$
+//
 //  SuperTux - "Will-O-Wisp" Badguy
 //  Copyright (C) 2006 Christoph Sommer <christoph.sommer@2006.expires.deltadevelopment.de>
 //
@@ -12,7 +12,7 @@
 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 //  GNU General Public License for more details.
-// 
+//
 //  You should have received a copy of the GNU General Public License
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 #include <config.h>
 
 #include "willowisp.hpp"
-#include "msg.hpp"
+
+#include "log.hpp"
 #include "game_session.hpp"
+#include "object/lantern.hpp"
+#include "object/player.hpp"
+#include "scripting/squirrel_util.hpp"
+#include "object/path.hpp"
+#include "object/path_walker.hpp"
+#include "audio/sound_source.hpp"
+#include "lisp/writer.hpp"
+#include "object_factory.hpp"
+#include "audio/sound_manager.hpp"
+#include "sector.hpp"
+#include "sprite/sprite.hpp"
 
 static const float FLYSPEED = 64; /**< speed in px per second */
 static const float TRACK_RANGE = 384; /**< at what distance to start tracking the player */
 static const float VANISH_RANGE = 512; /**< at what distance to stop tracking and vanish */
+static const std::string SOUNDFILE = "sounds/willowisp.wav";
 
 WillOWisp::WillOWisp(const lisp::Lisp& reader)
-  : mystate(STATE_IDLE), target_sector("main"), target_spawnpoint("main"), soundSource(0)
+  : BadGuy(reader, "images/creatures/willowisp/willowisp.sprite", LAYER_FLOATINGOBJECTS), mystate(STATE_IDLE), target_sector("main"), target_spawnpoint("main")
 {
-  reader.get("x", start_position.x);
-  reader.get("y", start_position.y);
+  bool running = false;
+  flyspeed     = FLYSPEED;
+  track_range  = TRACK_RANGE;
+  vanish_range = VANISH_RANGE;
+
   reader.get("sector", target_sector);
   reader.get("spawnpoint", target_spawnpoint);
+  reader.get("name", name);
+  reader.get("flyspeed", flyspeed);
+  reader.get("track-range", track_range);
+  reader.get("vanish-range", vanish_range);
+  reader.get("hit-script", hit_script);
+  reader.get("running", running);
+
+  const lisp::Lisp* pathLisp = reader.get_lisp("path");
+  if(pathLisp != NULL) {
+    path.reset(new Path());
+    path->read(*pathLisp);
+    walker.reset(new PathWalker(path.get(), running));
+    if(running)
+      mystate = STATE_PATHMOVING_TRACK;
+  }
 
-  bbox.set_size(32, 32);  
-  sprite = sprite_manager->create("images/creatures/willowisp/willowisp.sprite");
   countMe = false;
-}
+  sound_manager->preload(SOUNDFILE);
+  sound_manager->preload("sounds/warp.wav");
 
-WillOWisp::~WillOWisp()
-{
-  delete soundSource;
+  sprite->set_action("idle");
 }
 
 void
-WillOWisp::write(lisp::Writer& writer)
+WillOWisp::draw(DrawingContext& context)
 {
-  writer.start_list("willowisp");
+  sprite->draw(context, get_pos(), layer);
 
-  writer.write_float("x", start_position.x);
-  writer.write_float("y", start_position.y);
-  writer.write_string("sector", target_sector);
-  writer.write_string("spawnpoint", target_spawnpoint);
+  context.push_target();
+  context.set_target(DrawingContext::LIGHTMAP);
 
-  writer.end_list("willowisp");
+  sprite->draw(context, get_pos(), layer);
+
+  context.pop_target();
 }
 
 void
@@ -67,81 +95,198 @@ WillOWisp::active_update(float elapsed_time)
   Vector p2 = player->get_pos() + (player->get_bbox().p2 - player->get_bbox().p1) / 2;
   Vector dist = (p2 - p1);
 
-  if (mystate == STATE_IDLE) {
-    if (dist.norm() <= TRACK_RANGE) {
+  switch(mystate) {
+  case STATE_STOPPED:
+    break;
+
+  case STATE_IDLE:
+    if (dist.norm() <= track_range) {
       mystate = STATE_TRACKING;
     }
-  }
-  
-  if (mystate == STATE_TRACKING) {
-    if (dist.norm() <= VANISH_RANGE) {
+    break;
+
+  case STATE_TRACKING:
+    if (dist.norm() > vanish_range) {
+      vanish();
+    } else if (dist.norm() >= 1) {
       Vector dir = dist.unit();
-      movement = dir*elapsed_time*FLYSPEED;
+      movement = dir * elapsed_time * flyspeed;
     } else {
-      mystate = STATE_VANISHING;
-      sprite->set_action("vanishing", 1);
+      /* We somehow landed right on top of the player without colliding.
+       * Sit tight and avoid a division by zero. */
     }
-    soundSource->set_position(get_pos());
-  }
+    sound_source->set_position(get_pos());
+    break;
 
-  if (mystate == STATE_WARPING) {
+  case STATE_WARPING:
     if(sprite->animation_done()) {
       remove_me();
     }
-  }
 
-  if (mystate == STATE_VANISHING) {
+  case STATE_VANISHING: {
+    Vector dir = dist.unit();
+    movement = dir * elapsed_time * flyspeed;
     if(sprite->animation_done()) {
       remove_me();
     }
+    break;
+  }
+
+  case STATE_PATHMOVING:
+  case STATE_PATHMOVING_TRACK:
+    if(walker.get() == NULL)
+      return;
+    movement = walker->advance(elapsed_time) - get_pos();
+    if(mystate == STATE_PATHMOVING_TRACK && dist.norm() <= track_range) {
+      mystate = STATE_TRACKING;
+    }
+    break;
+
+  default:
+    assert(false);
   }
-  
 }
 
 void
 WillOWisp::activate()
 {
-  sprite->set_action("idle");
-
-  delete soundSource;
-  soundSource = sound_manager->create_sound_source("sounds/rain.wav");
-  if(!soundSource) {
-    msg_warning("Couldn't start WillOWisp sound");
-    return;
-  }
-  soundSource->set_position(get_pos());
-  soundSource->set_looping(true);
-  soundSource->set_gain(2.0);
-  soundSource->set_reference_distance(32);
-  soundSource->play();
+  sound_source.reset(sound_manager->create_sound_source(SOUNDFILE));
+  sound_source->set_position(get_pos());
+  sound_source->set_looping(true);
+  sound_source->set_gain(2.0);
+  sound_source->set_reference_distance(32);
+  sound_source->play();
 }
 
 void
 WillOWisp::deactivate()
 {
-  delete soundSource;
-  soundSource = 0;
+  sound_source.reset(NULL);
+
+  switch (mystate) {
+    case STATE_STOPPED:
+    case STATE_IDLE:
+    case STATE_PATHMOVING:
+    case STATE_PATHMOVING_TRACK:
+      break;
+    case STATE_TRACKING:
+      mystate = STATE_IDLE;
+      break;
+    case STATE_WARPING:
+    case STATE_VANISHING:
+      remove_me();
+      break;
+  }
 }
 
 void
-WillOWisp::kill_fall()
+WillOWisp::vanish()
 {
+  mystate = STATE_VANISHING;
+  sprite->set_action("vanishing", 1);
+  set_colgroup_active(COLGROUP_DISABLED);
+}
+
+bool
+WillOWisp::collides(GameObject& other, const CollisionHit& ) {
+  Lantern* lantern = dynamic_cast<Lantern*>(&other);
+
+  if (lantern && lantern->is_open())
+    return true;
+
+  if (dynamic_cast<Player*>(&other))
+    return true;
+
+  return false;
 }
 
 HitResponse
 WillOWisp::collision_player(Player& player, const CollisionHit& ) {
-  if(player.is_invincible()) return ABORT_MOVE;
+  if(player.is_invincible())
+    return ABORT_MOVE;
 
-  if (mystate != STATE_TRACKING) return ABORT_MOVE;
+  if (mystate != STATE_TRACKING)
+    return ABORT_MOVE;
 
   mystate = STATE_WARPING;
   sprite->set_action("warping", 1);
 
-  GameSession::current()->respawn(target_sector, target_spawnpoint);
+  if(hit_script != "") {
+    std::istringstream stream(hit_script);
+    Sector::current()->run_script(stream, "hit-script");
+  } else {
+    GameSession::current()->respawn(target_sector, target_spawnpoint);
+  }
   sound_manager->play("sounds/warp.wav");
 
   return CONTINUE;
 }
 
-IMPLEMENT_FACTORY(WillOWisp, "willowisp")
+void
+WillOWisp::goto_node(int node_no)
+{
+  walker->goto_node(node_no);
+  if(mystate != STATE_PATHMOVING && mystate != STATE_PATHMOVING_TRACK) {
+    mystate = STATE_PATHMOVING;
+  }
+}
 
+void
+WillOWisp::start_moving()
+{
+  walker->start_moving();
+}
+
+void
+WillOWisp::stop_moving()
+{
+  walker->stop_moving();
+}
+
+void
+WillOWisp::set_state(const std::string& new_state)
+{
+  if(new_state == "stopped") {
+    mystate = STATE_STOPPED;
+  } else if(new_state == "idle") {
+    mystate = STATE_IDLE;
+  } else if(new_state == "move_path") {
+    mystate = STATE_PATHMOVING;
+    walker->start_moving();
+  } else if(new_state == "move_path_track") {
+    mystate = STATE_PATHMOVING_TRACK;
+    walker->start_moving();
+  } else if(new_state == "normal") {
+    mystate = STATE_IDLE;
+  } else if(new_state == "vanish") {
+    vanish();
+  } else {
+    std::ostringstream msg;
+    msg << "Can't set unknown willowisp state '" << new_state << "', should "
+                "be stopped, move_path, move_path_track or normal";
+    throw new std::runtime_error(msg.str());
+  }
+}
+
+void
+WillOWisp::expose(HSQUIRRELVM vm, SQInteger table_idx)
+{
+  if (name.empty())
+    return;
+
+  std::cout << "Expose me '" << name << "'\n";
+  Scripting::WillOWisp* interface = static_cast<Scripting::WillOWisp*> (this);
+  expose_object(vm, table_idx, interface, name);
+}
+  
+void
+WillOWisp::unexpose(HSQUIRRELVM vm, SQInteger table_idx)
+{
+  if (name.empty())
+    return;
+
+  std::cout << "UnExpose me '" << name << "'\n";
+  Scripting::unexpose_object(vm, table_idx, name);
+}
+
+IMPLEMENT_FACTORY(WillOWisp, "willowisp")