First effective implementation of LayerView (both GUI, sorting and

storing in session)

Scene.cpp

@@ -206,6 +206,15 @@ void Group::attach(Node *child)
 }
 
 
+void Group::sort()
+{
+    // reorder list of nodes
+    NodeSet ordered_children;
+    for(auto it = children_.begin(); it != children_.end(); it++)
+        ordered_children.insert(*it);
+    children_.swap(ordered_children);
+}
+
 void Group::detatch(Node *child)
 {
     // find the node with this id, and erase it out of the list of children

Scene.h

@@ -167,12 +167,12 @@ public:
     virtual void clear();
     virtual void attach (Node *child);
     virtual void detatch (Node *child);
+    virtual void sort();
 
     NodeSet::iterator begin();
     NodeSet::iterator end();
     uint numChildren() const;
 
-
 protected:
     NodeSet children_;
 

Session.cpp

@@ -5,6 +5,8 @@
 #include "Session.h"
 #include "GarbageVisitor.h"
 
+#include "Log.h"
+
 Session::Session()
 {
     config_[View::RENDERING] = new Group;
@@ -30,7 +32,10 @@ void Session::update(float dt)
 {
     // pre-render of all sources
     for( SourceList::iterator it = sources_.begin(); it != sources_.end(); it++){
-        (*it)->render( );
+        // render the source
+        (*it)->render();
+        // update the source
+        (*it)->update(dt);
     }
 
     // update the scene tree

SessionCreator.cpp

@@ -193,6 +193,9 @@ void SessionCreator::visit (Source& s)
     xmlCurrent_ = sourceNode->FirstChildElement("Geometry");
     s.groupNode(View::GEOMETRY)->accept(*this);
 
+    xmlCurrent_ = sourceNode->FirstChildElement("Layer");
+    s.groupNode(View::LAYER)->accept(*this);
+
     xmlCurrent_ = sourceNode->FirstChildElement("Blending");
     s.blendingShader()->accept(*this);
 

SessionVisitor.cpp

@@ -311,6 +311,10 @@ void SessionVisitor::visit (Source& s)
     sourceNode->InsertEndChild(xmlCurrent_);
     s.groupNode(View::GEOMETRY)->accept(*this);
 
+    xmlCurrent_ = xmlDoc_->NewElement( "Layer" );
+    sourceNode->InsertEndChild(xmlCurrent_);
+    s.groupNode(View::LAYER)->accept(*this);
+
     xmlCurrent_ = xmlDoc_->NewElement( "Blending" );
     sourceNode->InsertEndChild(xmlCurrent_);
     s.blendingShader()->accept(*this);

Source.cpp

@@ -14,8 +14,9 @@
 #include "MediaPlayer.h"
 #include "SearchVisitor.h"
 
+#include "Log.h"
 
-Source::Source(const std::string &name) : name_(name), initialized_(false)
+Source::Source(const std::string &name) : name_(name), initialized_(false), need_update_(true)
 {
     sprintf(initials_, "__");
 
@@ -107,6 +108,30 @@ void Source::setOverlayVisible(bool on)
         (*o).second->visible_ = on;
 }
 
+void Source::update(float dt)
+{
+    if (need_update_)
+    {
+        // ADJUST alpha based on MIXING node
+        // read position of the mixing node and interpret this as transparency of render output
+        glm::vec2 dist = glm::vec2(groups_[View::MIXING]->translation_);
+        float alpha = 1.0 - CLAMP( SQUARE( glm::length(dist) ), 0.f, 1.f );
+        blendingshader_->color.a = alpha;
+
+        // MODIFY geometry based on GEOMETRY node
+        groups_[View::RENDERING]->translation_ = groups_[View::GEOMETRY]->translation_;
+        groups_[View::RENDERING]->scale_ = groups_[View::GEOMETRY]->scale_;
+        groups_[View::RENDERING]->rotation_ = groups_[View::GEOMETRY]->rotation_;
+
+        // MODIFY DEPTH
+        groups_[View::MIXING]->translation_.z = groups_[View::LAYER]->translation_.z;
+        groups_[View::GEOMETRY]->translation_.z = groups_[View::LAYER]->translation_.z;
+        groups_[View::RENDERING]->translation_.z = groups_[View::LAYER]->translation_.z;
+
+        need_update_ = false;
+    }
+}
+
 Handles *Source::handleNode(Handles::Type t) const
 {
     if ( t == Handles::ROTATE )
@@ -285,17 +310,6 @@ void MediaSource::render()
         renderbuffer_->begin();
         mediasurface_->draw(glm::identity<glm::mat4>(), projection);
         renderbuffer_->end();
-
-        // ADJUST alpha based on MIXING node
-        // read position of the mixing node and interpret this as transparency of render output
-        float alpha = 1.0 - CLAMP( SQUARE( glm::length(groups_[View::MIXING]->translation_) ), 0.f, 1.f );
-        blendingshader_->color.a = alpha;
-
-        // MODIFY geometry based on GEOMETRY node
-        groups_[View::RENDERING]->translation_ = groups_[View::GEOMETRY]->translation_;
-        groups_[View::RENDERING]->scale_ = groups_[View::GEOMETRY]->scale_;
-        groups_[View::RENDERING]->rotation_ = groups_[View::GEOMETRY]->rotation_;
-
     }
 }
 

Source.h

@@ -37,24 +37,32 @@ public:
     inline Node *groupNode(View::Mode m) const { return static_cast<Node*>(groups_.at(m)); }
     Handles *handleNode(Handles::Type t) const;
 
-    // every Source has a shader to control image processing effects
+    // a Source has a shader to control image processing effects
     inline ImageProcessingShader *processingShader() const { return rendershader_; }
 
-    // every Source has a shader to control mixing effects
+    // a Source has a shader to control mixing effects
     inline ImageShader *blendingShader() const { return blendingshader_; }
 
-    // every Source shall have a frame buffer
-    virtual FrameBuffer *frame() const = 0;
+    // a Source shall be updated before displayed (Mixing, Geometry and Layer)
+    void update (float dt);
 
-    // every Source shall be rendered before draw
-    virtual void render() = 0;
+    // touch to request update
+    inline void touch() { need_update_ = true; }
 
     // accept all kind of visitors
     virtual void accept (Visitor& v);
 
-    // every Source shall informs if the source failed (i.e. shall be deleted)
+    // SPECIFIC implementation for subtypes
+
+    // a Source shall informs if the source failed (i.e. shall be deleted)
     virtual bool failed() const { return false; }
 
+    // every Source shall have a frame buffer
+    virtual FrameBuffer *frame() const = 0;
+
+    // every Source shall be rendered into the frame buffer
+    virtual void render() = 0;
+
 protected:
     // name
     std::string name_;
@@ -84,6 +92,9 @@ protected:
     // overlay to be displayed on top of source
     std::map<View::Mode, Group*> overlays_;
     Handles *resize_handle_, *resize_H_handle_, *resize_V_handle_, *rotate_handle_;
+
+    // update need
+    bool need_update_;
 };
 
 // TODO SourceSet sorted by shader

View.cpp

@@ -42,6 +42,9 @@ void View::update(float dt)
 {
     // recursive update from root of scene
     scene.update( dt );
+
+    // reorder depth
+    scene.fg()->sort();
 }
 
 void View::drag (glm::vec2 from, glm::vec2 to)
@@ -126,6 +129,8 @@ void MixingView::grab (glm::vec2 from, glm::vec2 to, Source *s, std::pair<Node *
     // compute delta translation
     sourceNode->translation_ = start_translation + gl_Position_to - gl_Position_from;
 
+    // request update
+    s->touch();
 }
 
 
@@ -323,6 +328,8 @@ void GeometryView::grab (glm::vec2 from, glm::vec2 to, Source *s, std::pair<Node
         sourceNode->translation_ = start_translation + gl_Position_to - gl_Position_from;
     }
 
+    // request update
+    s->touch();
 }
 
 LayerView::LayerView() : View(LAYER), aspect_ratio(1.f)
@@ -379,7 +386,6 @@ void LayerView::zoom (float factor)
     z = CLAMP( z + 0.1f * factor, 0.2f, 10.f);
     scene.root()->scale_.x = z;
     scene.root()->scale_.y = z;
-    Log::Info("scale layer %f", scene.root()->scale_.x );
 }
 
 
@@ -409,6 +415,10 @@ void LayerView::grab (glm::vec2 from, glm::vec2 to, Source *s, std::pair<Node *,
     sourceNode->translation_.x = CLAMP( sourceNode->translation_.x, -10.f, 0.f);
     sourceNode->translation_.y = sourceNode->translation_.x / aspect_ratio;
 
+    // change depth
+    sourceNode->translation_.z = -sourceNode->translation_.x;
 
+    // request update
+    s->touch();
 }