New GameObject SpriteParticle

[supertux.git] / src / badguy / flyingsnowball.cpp

diff --git a/src/badguy/flyingsnowball.cpp b/src/badguy/flyingsnowball.cpp
index 1fa4374..e7bd28a 100644 (file)
--- a/src/badguy/flyingsnowball.cpp
+++ b/src/badguy/flyingsnowball.cpp
@@ -1,7 +1,7 @@
 //  $Id$
-// 
+//
 //  SuperTux
-//  Copyright (C) 2005 Matthias Braun <matze@braunis.de>
+//  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
 //
 //  This program is free software; you can redistribute it and/or
 //  modify it under the terms of the GNU General Public License
@@ -12,26 +12,34 @@
 //  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
-//  02111-1307, USA.
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
 #include <config.h>
 
 #include <stdio.h>
 
 #include "flyingsnowball.hpp"
+#include "random_generator.hpp"
+#include "object/sprite_particle.hpp"
 
 static const float FLYTIME = 1.0;
 static const float FLYSPEED = 100.0;
 
+namespace {
+  const float PUFF_PROBABILITY = 0.1; /**< chanche of puffs being spawned in the current cycle */
+  const float PUFF_INTERVAL_MIN = 0.1; /**< spawn new puff of smoke at most that often */
+  const float PUFF_INTERVAL_MAX = 1.1; /**< spawn new puff of smoke at least that often */
+}
+
 FlyingSnowBall::FlyingSnowBall(const lisp::Lisp& reader)
 {
   reader.get("x", start_position.x);
   reader.get("y", start_position.y);
-  bbox.set_size(31.8, 31.8);
   sprite = sprite_manager->create("images/creatures/flying_snowball/flying_snowball.sprite");
+  bbox.set_size(sprite->get_current_hitbox_width(), sprite->get_current_hitbox_height());
   physic.enable_gravity(false);
 }
 
@@ -39,8 +47,8 @@ FlyingSnowBall::FlyingSnowBall(float pos_x, float pos_y)
 {
   start_position.x = pos_x;
   start_position.y = pos_y;
-  bbox.set_size(31.8, 31.8);
   sprite = sprite_manager->create("images/creatures/flying_snowball/flying_snowball.sprite");
+  bbox.set_size(sprite->get_current_hitbox_width(), sprite->get_current_hitbox_height());
   physic.enable_gravity(false);
 }
 
@@ -62,6 +70,7 @@ FlyingSnowBall::activate()
   mode = FLY_UP;
   physic.set_velocity_y(FLYSPEED);
   timer.start(FLYTIME/2);
+  puff_timer.start(systemRandom.randf(PUFF_INTERVAL_MIN, PUFF_INTERVAL_MAX));
 }
 
 bool
@@ -89,9 +98,19 @@ FlyingSnowBall::active_update(float elapsed_time)
     if(mode == FLY_UP) {
       mode = FLY_DOWN;
       physic.set_velocity_y(-FLYSPEED);
+
+      // stop puffing
+      puff_timer.stop();
+      
     } else if(mode == FLY_DOWN) {
       mode = FLY_UP;
       physic.set_velocity_y(FLYSPEED);
+
+      // roll a dice whether to start puffing
+      if (systemRandom.randf(0, 1) < PUFF_PROBABILITY) {
+        puff_timer.start(systemRandom.randf(PUFF_INTERVAL_MIN, PUFF_INTERVAL_MAX));
+      }
+
     }
     timer.start(FLYTIME);
   }
@@ -102,6 +121,15 @@ FlyingSnowBall::active_update(float elapsed_time)
     dir = (player->get_pos().x > get_pos().x) ? RIGHT : LEFT;
     sprite->set_action(dir == LEFT ? "left" : "right");
   }
+
+  // spawn smoke puffs
+  if (puff_timer.check()) {
+    Vector ppos = bbox.get_middle();
+    Vector pspeed = Vector(systemRandom.randf(-10, 10), 150);
+    Vector paccel = Vector(0,0);
+    Sector::current()->add_object(new SpriteParticle("images/objects/particles/smoke.sprite", ppos, pspeed, paccel, LAYER_OBJECTS-1));
+    puff_timer.start(systemRandom.randf(PUFF_INTERVAL_MIN, PUFF_INTERVAL_MAX));
+  }
 }
 
 IMPLEMENT_FACTORY(FlyingSnowBall, "flyingsnowball")