Changed hotspot keyword by offset, as asked by Benjamin.

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

diff --git a/lib/special/sprite.cpp b/lib/special/sprite.cpp
index 3f28031..9bd8a98 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_hotspot);
+  lispreader.read_int("y-offset", action->y_hotspot);
   lispreader.read_float("fps",     action->fps);
 
   std::vector<std::string> images;
@@ -92,22 +94,31 @@ Sprite::init_defaults(Action* act)
   act->y_hotspot = 0;
   act->fps = 10;
 
-  act->animation_loops = 0;
-  last_tick = 0;
+  start_animation(-1);
 }
 
 void
 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::start_animation(int loops)
 {
-action->animation_loops = loops;
 reset();
+animation_loops = loops;
 }
 
 void
@@ -115,25 +126,80 @@ Sprite::reset()
 {
 frame = 0;
 last_tick = SDL_GetTicks();
+animation_reversed = false;
+next_action.clear();
 }
 
 bool
 Sprite::check_animation()
 {
-return action->animation_loops;
+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()
 {
-frame += (action->fps/1000) * (SDL_GetTicks() - last_tick);
+if(animation_loops == 0)
+  return;
+
+float frame_inc = (action->fps/1000.0) * (SDL_GetTicks() - last_tick);
 last_tick = SDL_GetTicks();
 
-if((unsigned int)frame >= action->surfaces.size())
+if(animation_reversed)
+  frame -= frame_inc;
+else
+  frame += frame_inc;
+
+if(animation_reversed)
   {
-  frame = 0;
-  if(action->animation_loops > 0)
-    action->animation_loops--;
+  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;
+    }
   }
 }
 
@@ -143,8 +209,13 @@ Sprite::draw(DrawingContext& context, const Vector& pos, int layer,
 {
   update();
 
-  context.draw_surface(action->surfaces[(int)frame],
-          pos - Vector(action->x_hotspot, action->y_hotspot), layer, drawing_effect);
+  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_hotspot, action->y_hotspot), layer, drawing_effect);
 }
 
 #if 0
@@ -162,13 +233,13 @@ Sprite::draw_part(float sx, float sy, float x, float y, float w, float h)
 int
 Sprite::get_width()
 {
-  return action->surfaces[get_current_frame()]->w;
+  return action->surfaces[get_frame()]->w;
 }
 
 int
 Sprite::get_height()
 {
-  return action->surfaces[get_current_frame()]->h;
+  return action->surfaces[get_frame()]->h;
 }
 
 /* EOF */