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Extend mechanism of visitor for all important classes that has

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attributes of a scene (for saving in XML, or other visitors)
This commit is contained in:
brunoherbelin
2020-04-01 14:41:42 +02:00
parent 178bf45f08
commit 37a6754de2
13 changed files with 176 additions and 101 deletions
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166
SessionVisitor.cpp
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@@ -3,6 +3,7 @@
#include "Log.h"
#include "Scene.h"
#include "Primitives.h"
#include "ImageShader.h"
#include "MediaPlayer.h"
#include "GstToolkit.h"
@@ -21,110 +22,113 @@ SessionVisitor::SessionVisitor(std::string filename) : filename_(filename)
xmlCurrent_ = nullptr;
}
void SessionVisitor::visit(Group &n)
{
XMLElement *xmlParent = xmlCurrent_;
xmlCurrent_ = xmlDoc_->NewElement("Group");
visit( (Node&) n);
for (int node = 0; node < n.numChildren(); ++node)
{
Node *child = n.getChild(node);
Group *g = dynamic_cast<Group *>(child);
if (g != nullptr) {
g->accept(*this);
continue;
}
TexturedRectangle *tr = dynamic_cast<TexturedRectangle *>(child);
if (tr != nullptr) {
tr->accept(*this);
continue;
}
MediaRectangle *mr = dynamic_cast<MediaRectangle *>(child);
if (mr != nullptr) {
mr->accept(*this);
continue;
}
LineStrip *ls = dynamic_cast<LineStrip *>(child);
if (ls != nullptr) {
ls->accept(*this);
continue;
}
Primitive *p = dynamic_cast<Primitive *>(child);
if (p != nullptr) {
p->accept(*this);
continue;
}
}
// recursive
xmlParent->InsertEndChild(xmlCurrent_);
xmlCurrent_ = xmlParent;
}
void SessionVisitor::visit(Node &n)
{
XMLElement *newelement = xmlDoc_->NewElement("Node");
// xmlCurrent_->SetAttribute("type", "Undefined");
XMLElement *transform = XMLElementGLM(xmlDoc_, n.transform_);
xmlCurrent_->InsertEndChild(transform);
newelement->InsertEndChild(transform);
// insert into hierarchy
xmlCurrent_->InsertEndChild(newelement);
xmlCurrent_ = newelement; // parent for next visits
}
void SessionVisitor::visit(Group &n)
{
// Node of a different type
xmlCurrent_->SetAttribute("type", "Group");
// loop over members of a group
XMLElement *group = xmlCurrent_;
for (int i = 0; i < n.numChildren(); ++i)
{
// recursive
n.getChild(i)->accept(*this);
// revert to group as current
xmlCurrent_ = group;
}
}
void SessionVisitor::visit(Primitive &n)
{
visit( (Node&) n);
// Node of a different type
xmlCurrent_->SetAttribute("type", "Primitive");
// go over members of a primitive
XMLElement *Primitive = xmlCurrent_;
xmlCurrent_ = xmlDoc_->NewElement("Shader");
n.getShader()->accept(*this);
Primitive->InsertEndChild(xmlCurrent_);
// revert to primitive as current
xmlCurrent_ = Primitive;
}
void SessionVisitor::visit(TexturedRectangle &n)
{
// type specific
XMLElement *xmlParent = xmlCurrent_;
xmlCurrent_ = xmlDoc_->NewElement("TexturedRectangle");
// Node of a different type
xmlCurrent_->SetAttribute("type", "TexturedRectangle");
XMLElement *image = xmlDoc_->NewElement("filename");
xmlCurrent_->InsertEndChild(image);
XMLText *filename = xmlDoc_->NewText( n.getResourcePath().c_str() );
XMLElement *image = xmlDoc_->NewElement("filename");
image->InsertEndChild(filename);
// inherited from Primitive
visit( (Primitive&) n);
// recursive
xmlParent->InsertEndChild(xmlCurrent_);
xmlCurrent_ = xmlParent;
xmlCurrent_->InsertEndChild(image);
}
void SessionVisitor::visit(MediaRectangle &n)
{
// type specific
XMLElement *xmlParent = xmlCurrent_;
xmlCurrent_ = xmlDoc_->NewElement("MediaRectangle");
// Node of a different type
xmlCurrent_->SetAttribute("type", "MediaRectangle");
XMLElement *media = xmlDoc_->NewElement("filename");
xmlCurrent_->InsertEndChild(media);
XMLText *filename = xmlDoc_->NewText( n.getMediaPath().c_str() );
XMLElement *media = xmlDoc_->NewElement("filename");
media->InsertEndChild(filename);
xmlCurrent_->InsertEndChild(media);
// TODO : visit MediaPlayer
n.getMediaPlayer()->accept(*this);
// inherited from Primitive
visit( (Primitive&) n);
}
void SessionVisitor::visit(MediaPlayer &n)
{
XMLElement *newelement = xmlDoc_->NewElement("MediaPlayer");
newelement->SetAttribute("play", n.isPlaying());
newelement->SetAttribute("loop", (int) n.Loop());
newelement->SetAttribute("speed", n.PlaySpeed());
xmlCurrent_->InsertEndChild(newelement);
}
void SessionVisitor::visit(Shader &n)
{
// Shader of a simple type
xmlCurrent_->SetAttribute("type", "DefaultShader");
XMLElement *color = XMLElementGLM(xmlDoc_, n.color);
color->SetAttribute("type", "RGBA");
xmlCurrent_->InsertEndChild(color);
}
void SessionVisitor::visit(ImageShader &n)
{
// Shader of a textured type
xmlCurrent_->SetAttribute("type", "ImageShader");
XMLElement *filter = xmlDoc_->NewElement("filter");
filter->SetAttribute("brightness", n.brightness);
filter->SetAttribute("contrast", n.contrast);
xmlCurrent_->InsertEndChild(filter);
// recursive
xmlParent->InsertEndChild(xmlCurrent_);
xmlCurrent_ = xmlParent;
}
void SessionVisitor::visit(LineStrip &n)
{
// type specific
XMLElement *xmlParent = xmlCurrent_;
xmlCurrent_ = xmlDoc_->NewElement("LineStrip");
// Node of a different type
xmlCurrent_->SetAttribute("type", "LineStrip");
XMLElement *color = XMLElementGLM(xmlDoc_, n.getColor());
color->SetAttribute("type", "RGBA");
@@ -137,13 +141,6 @@ void SessionVisitor::visit(LineStrip &n)
p->SetAttribute("point", (int) i);
xmlCurrent_->InsertEndChild(p);
}
// inherited from Primitive
visit( (Primitive&) n);
// recursive
xmlParent->InsertEndChild(xmlCurrent_);
xmlCurrent_ = xmlParent;
}
void SessionVisitor::visit(Scene &n)
@@ -158,10 +155,11 @@ void SessionVisitor::visit(Scene &n)
XMLComment *pComment = xmlDoc_->NewComment(s.c_str());
pRoot->InsertEndChild(pComment);
// save scene
// start recursive traverse from root node
xmlCurrent_ = pRoot;
n.getRoot()->accept(*this);
// save scene
XMLError eResult = xmlDoc_->SaveFile(filename_.c_str());
XMLCheckResult(eResult);
}