irrlicht/source/Irrlicht/CSceneLoaderIrr.cpp

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// Copyright (C) 2010-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "CSceneLoaderIrr.h"
#include "ISceneNodeAnimatorFactory.h"
#include "ISceneUserDataSerializer.h"
#include "ISceneManager.h"
#include "IVideoDriver.h"
#include "IFileSystem.h"
#include "os.h"
namespace irr
{
namespace scene
{
//! Constructor
CSceneLoaderIrr::CSceneLoaderIrr(ISceneManager *smgr, io::IFileSystem* fs)
: SceneManager(smgr), FileSystem(fs),
IRR_XML_FORMAT_SCENE(L"irr_scene"), IRR_XML_FORMAT_NODE(L"node"), IRR_XML_FORMAT_NODE_ATTR_TYPE(L"type"),
IRR_XML_FORMAT_ATTRIBUTES(L"attributes"), IRR_XML_FORMAT_MATERIALS(L"materials"),
IRR_XML_FORMAT_ANIMATORS(L"animators"), IRR_XML_FORMAT_USERDATA(L"userData")
{
}
//! Destructor
CSceneLoaderIrr::~CSceneLoaderIrr()
{
}
//! Returns true if the class might be able to load this file.
bool CSceneLoaderIrr::isALoadableFileExtension(const io::path& filename) const
{
return core::hasFileExtension(filename, "irr");
}
//! Returns true if the class might be able to load this file.
bool CSceneLoaderIrr::isALoadableFileFormat(io::IReadFile *file) const
{
// todo: check inside the file
return true;
}
//! Loads the scene into the scene manager.
bool CSceneLoaderIrr::loadScene(io::IReadFile* file, ISceneUserDataSerializer* userDataSerializer,
ISceneNode* rootNode)
{
if (!file)
{
os::Printer::log("Unable to open scene file", ELL_ERROR);
return false;
}
io::IXMLReader* reader = FileSystem->createXMLReader(file);
if (!reader)
{
os::Printer::log("Scene is not a valid XML file", file->getFileName().c_str(), ELL_ERROR);
return false;
}
// TODO: COLLADA_CREATE_SCENE_INSTANCES can be removed when the COLLADA loader is a scene loader
bool oldColladaSingleMesh = SceneManager->getParameters()->getAttributeAsBool(COLLADA_CREATE_SCENE_INSTANCES);
SceneManager->getParameters()->setAttribute(COLLADA_CREATE_SCENE_INSTANCES, false);
// read file
while (reader->read())
{
readSceneNode(reader, rootNode, userDataSerializer);
}
// restore old collada parameters
SceneManager->getParameters()->setAttribute(COLLADA_CREATE_SCENE_INSTANCES, oldColladaSingleMesh);
// clean up
reader->drop();
return true;
}
//! Reads the next node
void CSceneLoaderIrr::readSceneNode(io::IXMLReader* reader, ISceneNode* parent,
ISceneUserDataSerializer* userDataSerializer)
{
if (!reader)
return;
scene::ISceneNode* node = 0;
if (!parent && IRR_XML_FORMAT_SCENE==reader->getNodeName())
node = SceneManager->getRootSceneNode();
else if (parent && IRR_XML_FORMAT_NODE==reader->getNodeName())
{
// find node type and create it
core::stringc attrName = reader->getAttributeValue(IRR_XML_FORMAT_NODE_ATTR_TYPE.c_str());
node = SceneManager->addSceneNode(attrName.c_str(), parent);
if (!node)
os::Printer::log("Could not create scene node of unknown type", attrName.c_str());
}
else
node=parent;
// read attributes
while(reader->read())
{
bool endreached = false;
const wchar_t* name = reader->getNodeName();
switch (reader->getNodeType())
{
case io::EXN_ELEMENT_END:
if ((IRR_XML_FORMAT_NODE == name) ||
(IRR_XML_FORMAT_SCENE == name))
{
endreached = true;
}
break;
case io::EXN_ELEMENT:
if (IRR_XML_FORMAT_ATTRIBUTES == name)
{
// read attributes
io::IAttributes* attr = FileSystem->createEmptyAttributes(SceneManager->getVideoDriver());
attr->read(reader, true);
if (node)
node->deserializeAttributes(attr);
attr->drop();
}
else
if (IRR_XML_FORMAT_MATERIALS == name)
readMaterials(reader, node);
else
if (IRR_XML_FORMAT_ANIMATORS == name)
readAnimators(reader, node);
else
if (IRR_XML_FORMAT_USERDATA == name)
readUserData(reader, node, userDataSerializer);
else
if ((IRR_XML_FORMAT_NODE == name) ||
(IRR_XML_FORMAT_SCENE == name))
{
readSceneNode(reader, node, userDataSerializer);
}
else
{
os::Printer::log("Found unknown element in irrlicht scene file",
core::stringc(name).c_str());
}
break;
default:
break;
}
if (endreached)
break;
}
if (node && userDataSerializer)
userDataSerializer->OnCreateNode(node);
}
//! reads materials of a node
void CSceneLoaderIrr::readMaterials(io::IXMLReader* reader, ISceneNode* node)
{
u32 nr = 0;
while(reader->read())
{
const wchar_t* name = reader->getNodeName();
switch(reader->getNodeType())
{
case io::EXN_ELEMENT_END:
if (IRR_XML_FORMAT_MATERIALS == name)
return;
break;
case io::EXN_ELEMENT:
if (IRR_XML_FORMAT_ATTRIBUTES == name)
{
// read materials from attribute list
io::IAttributes* attr = FileSystem->createEmptyAttributes(SceneManager->getVideoDriver());
attr->read(reader);
if (node && node->getMaterialCount() > nr)
{
SceneManager->getVideoDriver()->fillMaterialStructureFromAttributes(
node->getMaterial(nr), attr);
}
attr->drop();
++nr;
}
break;
default:
break;
}
}
}
//! reads animators of a node
void CSceneLoaderIrr::readAnimators(io::IXMLReader* reader, ISceneNode* node)
{
while(reader->read())
{
const wchar_t* name = reader->getNodeName();
switch(reader->getNodeType())
{
case io::EXN_ELEMENT_END:
if (IRR_XML_FORMAT_ANIMATORS == name)
return;
break;
case io::EXN_ELEMENT:
if (IRR_XML_FORMAT_ATTRIBUTES == name)
{
// read animator data from attribute list
io::IAttributes* attr = FileSystem->createEmptyAttributes(SceneManager->getVideoDriver());
attr->read(reader);
if (node)
{
core::stringc typeName = attr->getAttributeAsString("Type");
ISceneNodeAnimator* anim = SceneManager->createSceneNodeAnimator(typeName.c_str(), node);
if (anim)
{
anim->deserializeAttributes(attr);
anim->drop();
}
}
attr->drop();
}
break;
default:
break;
}
}
}
//! reads user data of a node
void CSceneLoaderIrr::readUserData(io::IXMLReader* reader, ISceneNode* node, ISceneUserDataSerializer* userDataSerializer)
{
while(reader->read())
{
const wchar_t* name = reader->getNodeName();
switch(reader->getNodeType())
{
case io::EXN_ELEMENT_END:
if (IRR_XML_FORMAT_USERDATA == name)
return;
break;
case io::EXN_ELEMENT:
if (IRR_XML_FORMAT_ATTRIBUTES == name)
{
// read user data from attribute list
io::IAttributes* attr = FileSystem->createEmptyAttributes(SceneManager->getVideoDriver());
attr->read(reader);
if (node && userDataSerializer)
{
userDataSerializer->OnReadUserData(node, attr);
}
attr->drop();
}
break;
default:
break;
}
}
}
} // scene
} // irr