Add update invisible parameter to RibbonTrail and use it on the samples.

Source/Samples/44_RibbonTrailDemo/RibbonTrailDemo.cpp

@@ -109,6 +109,7 @@ void RibbonTrailDemo::CreateScene()
     boxTrail1->SetStartColor(Color(1.0f, 0.5f, 0.0f, 1.0f));
     boxTrail1->SetEndColor(Color(1.0f, 1.0f, 0.0f, 0.0f));
     boxTrail1->SetWidth(0.5f);
+    boxTrail1->SetUpdateInvisible(true);
 
     // Create second box for face camera trail demo with 4 column.
     // This will produce less distortion than first trail.
@@ -122,6 +123,7 @@ void RibbonTrailDemo::CreateScene()
     boxTrail2->SetEndColor(Color(1.0f, 1.0f, 0.0f, 0.0f));
     boxTrail2->SetWidth(0.5f);
     boxTrail2->SetTailColumn(4);
+    boxTrail2->SetUpdateInvisible(true);
 
     // Load ninja animated model for bone trail demo.
     Node* ninjaNode = scene_->CreateChild("Ninja");
@@ -147,6 +149,7 @@ void RibbonTrailDemo::CreateScene()
     swordTrail_->SetStartColor(Color(1.0f, 1.0f, 1.0f, 0.75f));
     swordTrail_->SetEndColor(Color(0.2f, 0.5f, 1.0f, 0.0f));
     swordTrail_->SetTailColumn(4);
+    swordTrail_->SetUpdateInvisible(true);
 
     // Add floating text for info.
     Node* boxTextNode1 = scene_->CreateChild("BoxText1");

Source/Urho3D/AngelScript/GraphicsAPI.cpp

@@ -1640,6 +1640,8 @@ static void RegisterRibbonTrail(asIScriptEngine* engine)
     engine->RegisterObjectMethod("RibbonTrail", "float get_lifetime() const", asMETHOD(RibbonTrail, GetLifetime), asCALL_THISCALL);
     engine->RegisterObjectMethod("RibbonTrail", "void set_emitting(bool)", asMETHOD(RibbonTrail, SetEmitting), asCALL_THISCALL);
     engine->RegisterObjectMethod("RibbonTrail", "bool get_emitting() const", asMETHOD(RibbonTrail, IsEmitting), asCALL_THISCALL);
+    engine->RegisterObjectMethod("RibbonTrail", "void set_updateInvisible(bool)", asMETHOD(RibbonTrail, SetUpdateInvisible), asCALL_THISCALL);
+    engine->RegisterObjectMethod("RibbonTrail", "bool get_updateInvisible() const", asMETHOD(RibbonTrail, GetUpdateInvisible), asCALL_THISCALL);
     engine->RegisterObjectMethod("RibbonTrail", "void set_tailColumn(uint)", asMETHOD(RibbonTrail, SetTailColumn), asCALL_THISCALL);
     engine->RegisterObjectMethod("RibbonTrail", "uint get_tailColumn() const", asMETHOD(RibbonTrail, GetTailColumn), asCALL_THISCALL);
     engine->RegisterObjectMethod("RibbonTrail", "void set_animationLodBias(float)", asMETHOD(RibbonTrail, SetAnimationLodBias), asCALL_THISCALL);

Source/Urho3D/Graphics/RibbonTrail.cpp

@@ -77,6 +77,7 @@ RibbonTrail::RibbonTrail(Context* context) :
     forceUpdate_(false),
     trailType_(TT_FACE_CAMERA),
     tailColumn_(1),
+    updateInvisible_(false),
     emitting_(true)
 {
     geometry_->SetVertexBuffer(0, vertexBuffer_);
@@ -103,6 +104,7 @@ void RibbonTrail::RegisterObject(Context* context)
     URHO3D_COPY_BASE_ATTRIBUTES(Drawable);
     URHO3D_MIXED_ACCESSOR_ATTRIBUTE("Material", GetMaterialAttr, SetMaterialAttr, ResourceRef, ResourceRef(Material::GetTypeStatic()), AM_DEFAULT);
     URHO3D_ACCESSOR_ATTRIBUTE("Emitting", IsEmitting, SetEmitting, bool, true, AM_DEFAULT);
+    URHO3D_ACCESSOR_ATTRIBUTE("Update Invisible", GetUpdateInvisible, SetUpdateInvisible, bool, false, AM_DEFAULT);
     URHO3D_ENUM_ACCESSOR_ATTRIBUTE("Trail Type", GetTrailType, SetTrailType, TrailType, trailTypeNames, TT_FACE_CAMERA, AM_DEFAULT);
     URHO3D_ACCESSOR_ATTRIBUTE("Tail Lifetime", GetLifetime, SetLifetime, float, 1.0f, AM_DEFAULT);
     URHO3D_ACCESSOR_ATTRIBUTE("Tail Column", GetTailColumn, SetTailColumn, unsigned, 0, AM_DEFAULT);
@@ -174,7 +176,7 @@ void RibbonTrail::HandleScenePostUpdate(StringHash eventType, VariantMap& eventD
     lastTimeStep_ = eventData[P_TIMESTEP].GetFloat();
 
     // Update if frame has changed
-    if (viewFrameNumber_ != lastUpdateFrameNumber_)
+    if (updateInvisible_ || viewFrameNumber_ != lastUpdateFrameNumber_)
     {
         // Reset if ribbon trail is too small and too much difference in frame
         if (points_.Size() < 3 && viewFrameNumber_ - lastUpdateFrameNumber_ > 1)
@@ -871,6 +873,11 @@ void RibbonTrail::SetAnimationLodBias(float bias)
     MarkNetworkUpdate();
 }
 
+void RibbonTrail::SetUpdateInvisible(bool enable)
+{
+    updateInvisible_ = enable;
+}
+
 void RibbonTrail::Commit()
 {
     MarkPositionsDirty();

Source/Urho3D/Graphics/RibbonTrail.h

@@ -104,6 +104,8 @@ public:
     void SetLifetime(float time);
     /// Set whether trail should be emitting.
     void SetEmitting(bool emitting);
+    /// Set whether to update when trail emiiter are not visible.
+    void SetUpdateInvisible(bool enable);
     /// Set number of column for every tails. Can be useful for fixing distortion at high angle.
     void SetTailColumn(unsigned tailColumn);
     /// Set animation LOD bias.
@@ -153,6 +155,9 @@ public:
     /// Return whether is currently emitting.
     bool IsEmitting() const { return emitting_ ; }
 
+    /// Return whether to update when trail emitter are not visible.
+    bool GetUpdateInvisible() const { return updateInvisible_; }
+
 protected:
     /// Handle node being assigned.
     virtual void OnSceneSet(Scene* scene);
@@ -227,6 +232,8 @@ private:
     bool forceUpdate_;
     /// Currently emitting flag.
     bool emitting_;
+    /// Update when invisible flag.
+    bool updateInvisible_;
 
     /// End of trail point for smoother tail disappearance.
     TrailPoint endTail_;

Source/Urho3D/LuaScript/pkgs/Graphics/RibbonTrail.pkg

@@ -19,6 +19,7 @@ class RibbonTrail : public Drawable
     void SetSorted(bool enable);
     void SetLifetime(float time);
     void SetEmitting(bool emitting);
+    void SetUpdateInvisible(bool updateInvisible);
     void SetTailColumn(unsigned tailColumn);
     void SetAnimationLodBias(float bias);
 
@@ -36,6 +37,7 @@ class RibbonTrail : public Drawable
     float GetLifetime() const;
     unsigned GetTailColumn() const;
     bool IsEmitting() const;
+    bool GetUpdateInvisible() const;
     float GetAnimationLodBias() const;
 
     tolua_property__get_set Material* material;
@@ -50,5 +52,6 @@ class RibbonTrail : public Drawable
     tolua_property__get_set float lifetime;
     tolua_property__get_set unsigned tailColumn;
     tolua_property__is_set bool emitting;
+    tolua_property__get_set bool updateInvisible;
     tolua_property__get_set float animationLodBias;
 }

bin/Data/LuaScripts/44_RibbonTrailDemo.lua

@@ -64,6 +64,7 @@ function CreateScene()
     boxTrail1.startColor = Color(1.0, 0.5, 0.0, 1.0)
     boxTrail1.endColor = Color(1.0, 1.0, 0.0, 0.0)
     boxTrail1.width = 0.5
+    boxTrail1.updateInvisible = true
 
     -- Create second box for face camera trail demo with 4 column.
     -- This will produce less distortion than first trail.
@@ -77,6 +78,7 @@ function CreateScene()
     boxTrail2.endColor = Color(1.0, 1.0, 0.0, 0.0)
     boxTrail2.width = 0.5
     boxTrail2.tailColumn = 4
+    boxTrail2.updateInvisible = true
 
     -- Load ninja animated model for bone trail demo.
     local ninjaNode = scene_:CreateChild("Ninja")
@@ -102,6 +104,7 @@ function CreateScene()
     swordTrail.startColor = Color(1.0, 1.0, 1.0, 0.75)
     swordTrail.endColor = Color(0.2, 0.5, 1.0, 0.0)
     swordTrail.tailColumn = 4
+    swordTrail.updateInvisible = true
 
     -- Add floating text for info.
     local boxTextNode1 = scene_:CreateChild("BoxText1")

bin/Data/Scripts/44_RibbonTrailDemo.as

@@ -66,6 +66,7 @@ void CreateScene()
     boxTrail1.startColor = Color(1.0f, 0.5f, 0.0f, 1.0f);
     boxTrail1.endColor = Color(1.0f, 1.0f, 0.0f, 0.0f);
     boxTrail1.width = 0.5f;
+    boxTrail1.updateInvisible = true;
     
     // Create second box for face camera trail demo with 4 column.
     // This will produce less distortion than first trail.
@@ -79,6 +80,7 @@ void CreateScene()
     boxTrail2.endColor = Color(1.0f, 1.0f, 0.0f, 0.0f);
     boxTrail2.width = 0.5f;
     boxTrail2.tailColumn = 4;
+    boxTrail2.updateInvisible = true;
     
     // Load ninja animated model for bone trail demo.
     Node@ ninjaNode = scene_.CreateChild("Ninja");
@@ -104,6 +106,7 @@ void CreateScene()
     swordTrail.startColor = Color(1.0f, 1.0f, 1.0f, 0.75f);
     swordTrail.endColor = Color(0.2, 0.5f, 1.0f, 0.0f);
     swordTrail.tailColumn = 4;
+    swordTrail.updateInvisible = true;
     
     // Add floating text for info.
     Node@ boxTextNode1 = scene_.CreateChild("BoxText1");