Updates to the alpha-test animation class

simgear/scene/model/animation.cxx

@@ -872,10 +872,8 @@ SGTexMultipleAnimation::update()
 // Implementation of SGAlphaTestAnimation
 ////////////////////////////////////////////////////////////////////////
 
-SGAlphaTestAnimation::SGAlphaTestAnimation (SGPropertyNode *prop_root,
+SGAlphaTestAnimation::SGAlphaTestAnimation(SGPropertyNode_ptr props)
-                                    SGPropertyNode_ptr props)
+  : SGAnimation(props, new ssgBranch)
-  : SGAnimation(props, new ssgBranch),
-    _done(false)
 {
   _alpha_clamp = props->getFloatValue("alpha-factor", 0.0);
 }
@@ -884,12 +882,9 @@ SGAlphaTestAnimation::~SGAlphaTestAnimation ()
 {
 }
 
-void SGAlphaTestAnimation::update()
+void SGAlphaTestAnimation::init()
 {
-  if (!_done) {
+  setAlphaClampToBranch(_branch,_alpha_clamp);
-    _done = true;
-    setAlphaClampToBranch(_branch,_alpha_clamp);
-  }
 }
 
 void SGAlphaTestAnimation::setAlphaClampToBranch(ssgBranch *b, float clamp)

simgear/scene/model/animation.hxx

@@ -387,10 +387,9 @@ private:
 class SGAlphaTestAnimation : public SGAnimation
 {
 public:
-  SGAlphaTestAnimation (SGPropertyNode *prop_root,
+  SGAlphaTestAnimation(SGPropertyNode_ptr props);
-                        SGPropertyNode_ptr props);
   virtual ~SGAlphaTestAnimation ();
-  virtual void update();
+  virtual void init();
 private:
   void setAlphaClampToBranch(ssgBranch *b, float clamp);
   bool _done;

simgear/scene/model/model.cxx

@@ -131,7 +131,7 @@ sgMakeAnimation( ssgBranch * model,
   } else if (!strcmp("blend", type)) {
     animation = new SGBlendAnimation(prop_root, node);
   } else if (!strcmp("alpha-test", type)) {
-    animation = new SGAlphaTestAnimation(prop_root, node);
+    animation = new SGAlphaTestAnimation(node);
   } else {
     animation = new SGNullAnimation(node);
     SG_LOG(SG_INPUT, SG_WARN, "Unknown animation type " << type);