From: Ricardo Cruz <rick2@aeiou.pt>
Date: Fri, 13 Aug 2004 22:32:42 +0000 (+0000)
Subject: Added support for one time animations to Sprite.
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=72b0d5692f64afdf2d097bf96637f5c55fe4413b;p=supertux.git

Added support for one time animations to Sprite.
I'll port the one-time animations hacks - if nobody else does - later.

SVN-Revision: 1770
---

diff --git a/lib/special/sprite.cpp b/lib/special/sprite.cpp
index 5e43dc679..3f28031c9 100644
--- a/lib/special/sprite.cpp
+++ b/lib/special/sprite.cpp
@@ -82,8 +82,6 @@ Sprite::parse_action(LispReader& lispreader)
           new Surface(datadir + "/images/" + images[i], true));
     }        
 
-  action->frame_delay = 1000.0f/action->fps;
-
   actions[action->name] = action;
 }
 
@@ -93,8 +91,9 @@ Sprite::init_defaults(Action* act)
   act->x_hotspot = 0;
   act->y_hotspot = 0;
   act->fps = 10;
-  act->frame_delay = 1000.0f/act->fps;
-  time = 0;
+
+  act->animation_loops = 0;
+  last_tick = 0;
 }
 
 void
@@ -105,27 +104,49 @@ action = i->second;
 }
 
 void
-Sprite::update(float /*delta*/)
+Sprite::start_animation(int loops)
 {
-  //time += 10*delta;
-  //std::cout << "Delta: " << delta << std::endl;
+action->animation_loops = loops;
+reset();
 }
 
 void
-Sprite::draw(DrawingContext& context, const Vector& pos, int layer,
-    Uint32 drawing_effect)
+Sprite::reset()
 {
-  time = SDL_GetTicks();
-  unsigned int frame = get_current_frame();
+frame = 0;
+last_tick = SDL_GetTicks();
+}
 
-  if (frame < action->surfaces.size())
+bool
+Sprite::check_animation()
+{
+return action->animation_loops;
+}
+
+void
+Sprite::update()
+{
+frame += (action->fps/1000) * (SDL_GetTicks() - last_tick);
+last_tick = SDL_GetTicks();
+
+if((unsigned int)frame >= action->surfaces.size())
   {
-    Surface* surface = action->surfaces[frame];
-    
-    context.draw_surface(surface, pos - Vector(action->x_hotspot, action->y_hotspot), layer, drawing_effect);
+  frame = 0;
+  if(action->animation_loops > 0)
+    action->animation_loops--;
   }
 }
 
+void
+Sprite::draw(DrawingContext& context, const Vector& pos, int layer,
+    Uint32 drawing_effect)
+{
+  update();
+
+  context.draw_surface(action->surfaces[(int)frame],
+          pos - Vector(action->x_hotspot, action->y_hotspot), layer, drawing_effect);
+}
+
 #if 0
 void
 Sprite::draw_part(float sx, float sy, float x, float y, float w, float h)
@@ -138,27 +159,14 @@ Sprite::draw_part(float sx, float sy, float x, float y, float w, float h)
 }
 #endif
 
-void
-Sprite::reset()
-{
-  time = 0;
-}
-
-int
-Sprite::get_current_frame() const
-{
-  unsigned int frame = static_cast<int>(fmodf(time, action->surfaces.size()*action->frame_delay)/action->frame_delay);
-  return frame % action->surfaces.size();
-}
-
 int
-Sprite::get_width() const
+Sprite::get_width()
 {
   return action->surfaces[get_current_frame()]->w;
 }
 
 int
-Sprite::get_height() const
+Sprite::get_height()
 {
   return action->surfaces[get_current_frame()]->h;
 }
diff --git a/lib/special/sprite.h b/lib/special/sprite.h
index 5837bc63c..05db0c60a 100644
--- a/lib/special/sprite.h
+++ b/lib/special/sprite.h
@@ -45,9 +45,7 @@ namespace SuperTux
         /** Frames per second */
         float fps;
 
-        /** Number of seconds that a frame is displayed until it is switched
-            to the next frame */
-        float frame_delay;
+        int animation_loops;
 
         std::vector<Surface*> surfaces;
         };
@@ -58,33 +56,28 @@ namespace SuperTux
       Sprite(lisp_object_t* cur);
       ~Sprite();
 
-      void reset();
-
-      /** Update the sprite and process to the next frame */
-      void update(float delta);
+      /** Draw sprite, automatically calculates next frame */
       void draw(DrawingContext& context, const Vector& pos, int layer,
                 Uint32 drawing_effect = NONE_EFFECT);
-      int get_current_frame() const;
 
       /** Set action (or state) */
       void set_action(std::string act);
 
+      /* Handling animations */
+      void start_animation(int loops);
+      bool check_animation();
+
       float get_fps()
-      {
-        return action->fps;
-      } ;
+        { return action->fps; }
       int get_frames()
-      {
-        return action->surfaces.size();
-      } ;
-
+        { return action->surfaces.size(); }
       std::string get_name() const
-        {
-          return name;
-        }
-      int get_width() const;
-      int get_height() const;
+        { return name; }
+      int get_width();
+      int get_height();
 
+      int get_current_frame()
+        { return (int)frame; }
       Surface* get_frame(unsigned int frame)
       {
         if(frame < action->surfaces.size())
@@ -96,9 +89,13 @@ namespace SuperTux
       void init_defaults(Action* act);
       void parse_action(LispReader& lispreader);
 
+      void update();
+      void reset();
+
       std::string name;
 
-      float time;
+      float frame;
+      float last_tick;
 
       typedef std::map <std::string, Action*> Actions;
       Actions actions;