From 70f26d626c6e0f7717be209438341987ae38ddfc Mon Sep 17 00:00:00 2001
From: Ricardo Cruz <rick2@aeiou.pt>
Date: Sat, 14 Aug 2004 11:32:51 +0000
Subject: [PATCH] Improved Sprites animations.

SVN-Revision: 1773
---
 lib/special/sprite.cpp | 60 ++++++++++++++++++++++++++++++++++++++++----------
 lib/special/sprite.h   | 23 +++++++++++++++----
 2 files changed, 67 insertions(+), 16 deletions(-)

diff --git a/lib/special/sprite.cpp b/lib/special/sprite.cpp
index 3f28031c9..d9134885e 100644
--- a/lib/special/sprite.cpp
+++ b/lib/special/sprite.cpp
@@ -92,7 +92,7 @@ Sprite::init_defaults(Action* act)
   act->y_hotspot = 0;
   act->fps = 10;
 
-  act->animation_loops = 0;
+  animation_loops = -1;
   last_tick = 0;
 }
 
@@ -106,7 +106,7 @@ action = i->second;
 void
 Sprite::start_animation(int loops)
 {
-action->animation_loops = loops;
+animation_loops = loops;
 reset();
 }
 
@@ -115,25 +115,58 @@ Sprite::reset()
 {
 frame = 0;
 last_tick = SDL_GetTicks();
+animation_reversed = false;
 }
 
 bool
 Sprite::check_animation()
 {
-return action->animation_loops;
+return animation_loops;
+}
+
+void
+Sprite::reverse_animation()
+{
+animation_reversed = !animation_reversed;
+
+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 inc_frame = (action->fps/1000) * (SDL_GetTicks() - last_tick);
+
+if(animation_reversed)
+  frame -= inc_frame;
+else
+  frame += inc_frame;
+
 last_tick = SDL_GetTicks();
 
-if((unsigned int)frame >= action->surfaces.size())
+if(!animation_reversed)
   {
-  frame = 0;
-  if(action->animation_loops > 0)
-    action->animation_loops--;
+  if((unsigned int)frame >= action->surfaces.size())
+    {
+    frame = 0;
+    if(animation_loops > 0)
+      animation_loops--;
+    }
+  }
+else
+  {
+  if((unsigned int)frame < 0)
+    {
+    frame = get_frames()-1;
+    if(animation_loops > 0)
+      animation_loops--;
+    }
   }
 }
 
@@ -143,8 +176,11 @@ 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())
+    std::cerr << "Warning: frame higher than total frames!\n";
+  else
+    context.draw_surface(action->surfaces[(int)frame],
+            pos - Vector(action->x_hotspot, action->y_hotspot), layer, drawing_effect);
 }
 
 #if 0
@@ -162,13 +198,13 @@ 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 */
diff --git a/lib/special/sprite.h b/lib/special/sprite.h
index 05db0c60a..f84894582 100644
--- a/lib/special/sprite.h
+++ b/lib/special/sprite.h
@@ -45,8 +45,6 @@ namespace SuperTux
         /** Frames per second */
         float fps;
 
-        int animation_loops;
-
         std::vector<Surface*> surfaces;
         };
 
@@ -63,21 +61,36 @@ namespace SuperTux
       /** Set action (or state) */
       void set_action(std::string act);
 
-      /* Handling animations */
+      /* Start an animation
+          -1 - for infinite
+          0  - stopped
+          1,2,3  - one, two, three times... */
       void start_animation(int loops);
+      /** Check if animation is stopped or not */
       bool check_animation();
+      /** Reverse the animation */
+      void reverse_animation();
 
       float get_fps()
         { return action->fps; }
+      /** Get current action total frames */
       int get_frames()
         { return action->surfaces.size(); }
+      /** Get sprite's name */
       std::string get_name() const
         { return name; }
+      /** Get current action name */
+      std::string get_action_name() const
+        { return action->name; }
       int get_width();
       int get_height();
 
-      int get_current_frame()
+      /** Get current frame */
+      int get_frame()
         { return (int)frame; }
+      /** Set current frame */
+      void set_frame(int frame_)
+        { frame = frame_; }
       Surface* get_frame(unsigned int frame)
       {
         if(frame < action->surfaces.size())
@@ -95,6 +108,8 @@ namespace SuperTux
       std::string name;
 
       float frame;
+      int animation_loops;
+      bool animation_reversed;
       float last_tick;
 
       typedef std::map <std::string, Action*> Actions;
-- 
2.11.0