Renamed code variables, as well.

[supertux.git] / lib / special / sprite.cpp

diff --git a/lib/special/sprite.cpp b/lib/special/sprite.cpp
index 94e0153..d27ae05 100644 (file)
--- a/lib/special/sprite.cpp
+++ b/lib/special/sprite.cpp
@@ -39,6 +39,8 @@ Sprite::Sprite(lisp_object_t* cur)
       name = lisp_string(data);
     else if(token == "action")
       parse_action(reader);
+    else
+      std::cerr << "Warning: Unknown sprite field: " << token << std::endl;
     }
 
   if(name.empty())
@@ -68,8 +70,8 @@ Sprite::parse_action(LispReader& lispreader)
   if(!lispreader.read_string("name", action->name))
     if(!actions.empty())
       Termination::abort("Error: If there are more than one action, they need names!", "");
-  lispreader.read_int("x-hotspot", action->x_hotspot);
-  lispreader.read_int("y-hotspot", action->y_hotspot);
+  lispreader.read_int("x-offset", action->x_offset);
+  lispreader.read_int("y-offset", action->y_offset);
   lispreader.read_float("fps",     action->fps);
 
   std::vector<std::string> images;
@@ -82,48 +84,138 @@ Sprite::parse_action(LispReader& lispreader)
           new Surface(datadir + "/images/" + images[i], true));
     }        
 
-  action->frame_delay = 1000.0f/action->fps;
-
   actions[action->name] = action;
 }
 
 void
 Sprite::init_defaults(Action* act)
 {
-  act->x_hotspot = 0;
-  act->y_hotspot = 0;
+  act->x_offset = 0;
+  act->y_offset = 0;
   act->fps = 10;
-  act->frame_delay = 1000.0f/act->fps;
-  time = 0;
+
+  start_animation(-1);
 }
 
 void
-Sprite::set_action(std::string& act)
+Sprite::set_action(std::string act)
 {
+if(!next_action.empty() && animation_loops > 0)
+  {
+  next_action = act;
+  return;
+  }
 Actions::iterator i = actions.find(act);
+if(i == actions.end())
+  {
+  std::cerr << "Warning: Action '" << act << "' not found on Sprite '" << name << "'\n";
+  return;
+  }
 action = i->second;
 }
 
 void
-Sprite::update(float /*delta*/)
+Sprite::start_animation(int loops)
 {
-  //time += 10*delta;
-  //std::cout << "Delta: " << delta << std::endl;
+reset();
+animation_loops = loops;
 }
 
 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();
+animation_reversed = false;
+next_action.clear();
+}
+
+bool
+Sprite::check_animation()
+{
+return animation_loops;
+}
+
+void
+Sprite::reverse_animation(bool reverse)
+{
+animation_reversed = reverse;
+
+if(animation_reversed)
+  frame = get_frames()-1;
+else
+  frame = 0;
+}
+
+void
+Sprite::update()
+{
+if(animation_loops == 0)
+  return;
 
-  if (frame < action->surfaces.size())
+float frame_inc = (action->fps/1000.0) * (SDL_GetTicks() - last_tick);
+last_tick = SDL_GetTicks();
+
+if(animation_reversed)
+  frame -= frame_inc;
+else
+  frame += frame_inc;
+
+if(animation_reversed)
   {
-    Surface* surface = action->surfaces[frame];
-    
-    context.draw_surface(surface, pos - Vector(action->x_hotspot, action->y_hotspot), layer, drawing_effect);
+  float excedent = frame - 0;
+  if((int)excedent < 0 || excedent >= get_frames())
+    {  // last case can happen when not used reverse_animation()
+    frame = get_frames() - 1;
+    if(animation_loops > 0)
+      {
+      animation_loops--;
+      if(animation_loops == 0 && !next_action.empty())
+        {
+        set_action(next_action);
+        start_animation(-1);
+        }
+      }
+
+    if(fabsf(excedent) < get_frames())
+      frame += excedent;
+    }
   }
+else
+  {
+  float excedent = frame - action->surfaces.size();
+  if((int)excedent >= 0)
+    {
+    frame = 0;
+    if(animation_loops > 0)
+      {
+      animation_loops--;
+      if(animation_loops == 0 && !next_action.empty())
+        {
+        set_action(next_action);
+        start_animation(-1);
+        }
+      }
+
+    if(excedent < get_frames())
+      frame += excedent;
+    }
+  }
+}
+
+void
+Sprite::draw(DrawingContext& context, const Vector& pos, int layer,
+    Uint32 drawing_effect)
+{
+  update();
+
+  if((int)frame >= get_frames() || (int)frame < 0)
+    std::cerr << "Warning: frame out of range: " << (int)frame
+              << "/" << get_frames() << " at sprite: " << get_name()
+              << "/" << get_action_name() << std::endl;
+  else
+    context.draw_surface(action->surfaces[(int)frame],
+            pos - Vector(action->x_offset, action->y_offset), layer, drawing_effect);
 }
 
 #if 0
@@ -134,33 +226,20 @@ Sprite::draw_part(float sx, float sy, float x, float y, float w, float h)
   unsigned int frame = get_current_frame();
 
   if (frame < surfaces.size())
-    surfaces[frame]->draw_part(sx, sy, x - x_hotspot, y - y_hotspot, w, h);
+    surfaces[frame]->draw_part(sx, sy, x - x_offset, y - y_offset, w, 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;
+  return action->surfaces[get_frame()]->w;
 }
 
 int
-Sprite::get_height() const
+Sprite::get_height()
 {
-  return action->surfaces[get_current_frame()]->h;
+  return action->surfaces[get_frame()]->h;
 }
 
 /* EOF */