NvCloth 1.1.4 Release. (24070740)

1 files changed, 1488 insertions, 0 deletions

diff --git a/NvCloth/samples/external/assimp-4.1.0/code/IRRLoader.cpp b/NvCloth/samples/external/assimp-4.1.0/code/IRRLoader.cpp
new file mode 100644
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+++ b/NvCloth/samples/external/assimp-4.1.0/code/IRRLoader.cpp
@@ -0,0 +1,1488 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2017, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file  IRRLoader.cpp
+ *  @brief Implementation of the Irr importer class
+ */
+
+
+
+#ifndef ASSIMP_BUILD_NO_IRR_IMPORTER
+
+#include "IRRLoader.h"
+#include "ParsingUtils.h"
+#include "fast_atof.h"
+#include "GenericProperty.h"
+
+#include <assimp/SceneCombiner.h>
+#include "StandardShapes.h"
+#include "Importer.h"
+
+// We need MathFunctions.h to compute the lcm/gcd of a number
+#include "MathFunctions.h"
+#include <memory>
+#include <assimp/DefaultLogger.hpp>
+#include <assimp/mesh.h>
+#include <assimp/material.h>
+#include <assimp/scene.h>
+#include <assimp/IOSystem.hpp>
+#include <assimp/postprocess.h>
+#include <assimp/importerdesc.h>
+
+using namespace Assimp;
+using namespace irr;
+using namespace irr::io;
+
+static const aiImporterDesc desc = {
+    "Irrlicht Scene Reader",
+    "",
+    "",
+    "http://irrlicht.sourceforge.net/",
+    aiImporterFlags_SupportTextFlavour,
+    0,
+    0,
+    0,
+    0,
+    "irr xml"
+};
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+IRRImporter::IRRImporter()
+    : fps(),
+    configSpeedFlag()
+{}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+IRRImporter::~IRRImporter()
+{}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the class can handle the format of the given file.
+bool IRRImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const
+{
+    /* NOTE: A simple check for the file extension is not enough
+     * here. Irrmesh and irr are easy, but xml is too generic
+     * and could be collada, too. So we need to open the file and
+     * search for typical tokens.
+     */
+    const std::string extension = GetExtension(pFile);
+
+    if (extension == "irr")return true;
+    else if (extension == "xml" || checkSig)
+    {
+        /*  If CanRead() is called in order to check whether we
+         *  support a specific file extension in general pIOHandler
+         *  might be NULL and it's our duty to return true here.
+         */
+        if (!pIOHandler)return true;
+        const char* tokens[] = {"irr_scene"};
+        return SearchFileHeaderForToken(pIOHandler,pFile,tokens,1);
+    }
+    return false;
+}
+
+// ------------------------------------------------------------------------------------------------
+const aiImporterDesc* IRRImporter::GetInfo () const
+{
+    return &desc;
+}
+
+// ------------------------------------------------------------------------------------------------
+void IRRImporter::SetupProperties(const Importer* pImp)
+{
+    // read the output frame rate of all node animation channels
+    fps = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_IRR_ANIM_FPS,100);
+    if (fps < 10.)  {
+        DefaultLogger::get()->error("IRR: Invalid FPS configuration");
+        fps = 100;
+    }
+
+    // AI_CONFIG_FAVOUR_SPEED
+    configSpeedFlag = (0 != pImp->GetPropertyInteger(AI_CONFIG_FAVOUR_SPEED,0));
+}
+
+// ------------------------------------------------------------------------------------------------
+// Build a mesh tha consists of a single squad (a side of a skybox)
+aiMesh* IRRImporter::BuildSingleQuadMesh(const SkyboxVertex& v1,
+    const SkyboxVertex& v2,
+    const SkyboxVertex& v3,
+    const SkyboxVertex& v4)
+{
+    // allocate and prepare the mesh
+    aiMesh* out = new aiMesh();
+
+    out->mPrimitiveTypes = aiPrimitiveType_POLYGON;
+    out->mNumFaces = 1;
+
+    // build the face
+    out->mFaces    = new aiFace[1];
+    aiFace& face   = out->mFaces[0];
+
+    face.mNumIndices = 4;
+    face.mIndices    = new unsigned int[4];
+    for (unsigned int i = 0; i < 4;++i)
+        face.mIndices[i] = i;
+
+    out->mNumVertices = 4;
+
+    // copy vertex positions
+    aiVector3D* vec = out->mVertices = new aiVector3D[4];
+    *vec++ = v1.position;
+    *vec++ = v2.position;
+    *vec++ = v3.position;
+    *vec   = v4.position;
+
+    // copy vertex normals
+    vec = out->mNormals = new aiVector3D[4];
+    *vec++ = v1.normal;
+    *vec++ = v2.normal;
+    *vec++ = v3.normal;
+    *vec   = v4.normal;
+
+    // copy texture coordinates
+    vec = out->mTextureCoords[0] = new aiVector3D[4];
+    *vec++ = v1.uv;
+    *vec++ = v2.uv;
+    *vec++ = v3.uv;
+    *vec   = v4.uv;
+    return out;
+}
+
+// ------------------------------------------------------------------------------------------------
+void IRRImporter::BuildSkybox(std::vector<aiMesh*>& meshes, std::vector<aiMaterial*> materials)
+{
+    // Update the material of the skybox - replace the name and disable shading for skyboxes.
+    for (unsigned int i = 0; i < 6;++i) {
+        aiMaterial* out = ( aiMaterial* ) (*(materials.end()-(6-i)));
+
+        aiString s;
+        s.length = ::ai_snprintf( s.data, MAXLEN, "SkyboxSide_%u",i );
+        out->AddProperty(&s,AI_MATKEY_NAME);
+
+        int shading = aiShadingMode_NoShading;
+        out->AddProperty(&shading,1,AI_MATKEY_SHADING_MODEL);
+    }
+
+    // Skyboxes are much more difficult. They are represented
+    // by six single planes with different textures, so we'll
+    // need to build six meshes.
+
+    const ai_real l = 10.0; // the size used by Irrlicht
+
+    // FRONT SIDE
+    meshes.push_back( BuildSingleQuadMesh(
+        SkyboxVertex(-l,-l,-l,  0, 0, 1,   1.0,1.0),
+        SkyboxVertex( l,-l,-l,  0, 0, 1,   0.0,1.0),
+        SkyboxVertex( l, l,-l,  0, 0, 1,   0.0,0.0),
+        SkyboxVertex(-l, l,-l,  0, 0, 1,   1.0,0.0)) );
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-6u);
+
+    // LEFT SIDE
+    meshes.push_back( BuildSingleQuadMesh(
+        SkyboxVertex( l,-l,-l,  -1, 0, 0,   1.0,1.0),
+        SkyboxVertex( l,-l, l,  -1, 0, 0,   0.0,1.0),
+        SkyboxVertex( l, l, l,  -1, 0, 0,   0.0,0.0),
+        SkyboxVertex( l, l,-l,  -1, 0, 0,   1.0,0.0)) );
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-5u);
+
+    // BACK SIDE
+    meshes.push_back( BuildSingleQuadMesh(
+        SkyboxVertex( l,-l, l,  0, 0, -1,   1.0,1.0),
+        SkyboxVertex(-l,-l, l,  0, 0, -1,   0.0,1.0),
+        SkyboxVertex(-l, l, l,  0, 0, -1,   0.0,0.0),
+        SkyboxVertex( l, l, l,  0, 0, -1,   1.0,0.0)) );
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-4u);
+
+    // RIGHT SIDE
+    meshes.push_back( BuildSingleQuadMesh(
+        SkyboxVertex(-l,-l, l,  1, 0, 0,   1.0,1.0),
+        SkyboxVertex(-l,-l,-l,  1, 0, 0,   0.0,1.0),
+        SkyboxVertex(-l, l,-l,  1, 0, 0,   0.0,0.0),
+        SkyboxVertex(-l, l, l,  1, 0, 0,   1.0,0.0)) );
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-3u);
+
+    // TOP SIDE
+    meshes.push_back( BuildSingleQuadMesh(
+        SkyboxVertex( l, l,-l,  0, -1, 0,   1.0,1.0),
+        SkyboxVertex( l, l, l,  0, -1, 0,   0.0,1.0),
+        SkyboxVertex(-l, l, l,  0, -1, 0,   0.0,0.0),
+        SkyboxVertex(-l, l,-l,  0, -1, 0,   1.0,0.0)) );
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-2u);
+
+    // BOTTOM SIDE
+    meshes.push_back( BuildSingleQuadMesh(
+        SkyboxVertex( l,-l, l,  0,  1, 0,   0.0,0.0),
+        SkyboxVertex( l,-l,-l,  0,  1, 0,   1.0,0.0),
+        SkyboxVertex(-l,-l,-l,  0,  1, 0,   1.0,1.0),
+        SkyboxVertex(-l,-l, l,  0,  1, 0,   0.0,1.0)) );
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-1u);
+}
+
+// ------------------------------------------------------------------------------------------------
+void IRRImporter::CopyMaterial(std::vector<aiMaterial*>& materials,
+    std::vector< std::pair<aiMaterial*, unsigned int> >& inmaterials,
+    unsigned int& defMatIdx,
+    aiMesh* mesh)
+{
+    if (inmaterials.empty())    {
+        // Do we have a default material? If not we need to create one
+        if (UINT_MAX == defMatIdx)
+        {
+            defMatIdx = (unsigned int)materials.size();
+            //TODO: add this materials to someone?
+            /*aiMaterial* mat = new aiMaterial();
+
+            aiString s;
+            s.Set(AI_DEFAULT_MATERIAL_NAME);
+            mat->AddProperty(&s,AI_MATKEY_NAME);
+
+            aiColor3D c(0.6f,0.6f,0.6f);
+            mat->AddProperty(&c,1,AI_MATKEY_COLOR_DIFFUSE);*/
+        }
+        mesh->mMaterialIndex = defMatIdx;
+        return;
+    }
+    else if (inmaterials.size() > 1)    {
+        DefaultLogger::get()->info("IRR: Skipping additional materials");
+    }
+
+    mesh->mMaterialIndex = (unsigned int)materials.size();
+    materials.push_back(inmaterials[0].first);
+}
+
+
+// ------------------------------------------------------------------------------------------------
+inline int ClampSpline(int idx, int size)
+{
+    return ( idx<0 ? size+idx : ( idx>=size ? idx-size : idx ) );
+}
+
+// ------------------------------------------------------------------------------------------------
+inline void FindSuitableMultiple(int& angle)
+{
+    if (angle < 3)angle = 3;
+    else if (angle < 10) angle = 10;
+    else if (angle < 20) angle = 20;
+    else if (angle < 30) angle = 30;
+    else
+    {
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+void IRRImporter::ComputeAnimations(Node* root, aiNode* real, std::vector<aiNodeAnim*>& anims)
+{
+    ai_assert(NULL != root && NULL != real);
+
+    // XXX totally WIP - doesn't produce proper results, need to evaluate
+    // whether there's any use for Irrlicht's proprietary scene format
+    // outside Irrlicht ...
+
+    if (root->animators.empty()) {
+        return;
+    }
+    unsigned int total = 0;
+    for (std::list<Animator>::iterator it = root->animators.begin();it != root->animators.end(); ++it)  {
+        if ((*it).type == Animator::UNKNOWN || (*it).type == Animator::OTHER)   {
+            DefaultLogger::get()->warn("IRR: Skipping unknown or unsupported animator");
+            continue;
+        }
+        ++total;
+    }
+    if (!total)return;
+    else if (1 == total)    {
+        DefaultLogger::get()->warn("IRR: Adding dummy nodes to simulate multiple animators");
+    }
+
+    // NOTE: 1 tick == i millisecond
+
+    unsigned int cur = 0;
+    for (std::list<Animator>::iterator it = root->animators.begin();
+        it != root->animators.end(); ++it)
+    {
+        if ((*it).type == Animator::UNKNOWN || (*it).type == Animator::OTHER)continue;
+
+        Animator& in = *it ;
+        aiNodeAnim* anim = new aiNodeAnim();
+
+        if (cur != total-1) {
+            // Build a new name - a prefix instead of a suffix because it is
+            // easier to check against
+            anim->mNodeName.length = ::ai_snprintf(anim->mNodeName.data, MAXLEN,
+                "$INST_DUMMY_%i_%s",total-1,
+                (root->name.length() ? root->name.c_str() : ""));
+
+            // we'll also need to insert a dummy in the node hierarchy.
+            aiNode* dummy = new aiNode();
+
+            for (unsigned int i = 0; i < real->mParent->mNumChildren;++i)
+                if (real->mParent->mChildren[i] == real)
+                    real->mParent->mChildren[i] = dummy;
+
+            dummy->mParent = real->mParent;
+            dummy->mName = anim->mNodeName;
+
+            dummy->mNumChildren = 1;
+            dummy->mChildren = new aiNode*[dummy->mNumChildren];
+            dummy->mChildren[0] = real;
+
+            // the transformation matrix of the dummy node is the identity
+
+            real->mParent = dummy;
+        }
+        else anim->mNodeName.Set(root->name);
+        ++cur;
+
+        switch (in.type)    {
+        case Animator::ROTATION:
+            {
+                // -----------------------------------------------------
+                // find out how long a full rotation will take
+                // This is the least common multiple of 360.f and all
+                // three euler angles. Although we'll surely find a
+                // possible multiple (haha) it could be somewhat large
+                // for our purposes. So we need to modify the angles
+                // here in order to get good results.
+                // -----------------------------------------------------
+                int angles[3];
+                angles[0] = (int)(in.direction.x*100);
+                angles[1] = (int)(in.direction.y*100);
+                angles[2] = (int)(in.direction.z*100);
+
+                angles[0] %= 360;
+                angles[1] %= 360;
+                angles[2] %= 360;
+
+                if ( (angles[0]*angles[1]) != 0 && (angles[1]*angles[2]) != 0 )
+                {
+                    FindSuitableMultiple(angles[0]);
+                    FindSuitableMultiple(angles[1]);
+                    FindSuitableMultiple(angles[2]);
+                }
+
+                int lcm = 360;
+
+                if (angles[0])
+                    lcm  = Math::lcm(lcm,angles[0]);
+
+                if (angles[1])
+                    lcm  = Math::lcm(lcm,angles[1]);
+
+                if (angles[2])
+                    lcm  = Math::lcm(lcm,angles[2]);
+
+                if (360 == lcm)
+                    break;
+
+#if 0
+                // This can be a division through zero, but we don't care
+                float f1 = (float)lcm / angles[0];
+                float f2 = (float)lcm / angles[1];
+                float f3 = (float)lcm / angles[2];
+#endif
+
+                // find out how many time units we'll need for the finest
+                // track (in seconds) - this defines the number of output
+                // keys (fps * seconds)
+                float max  = 0.f;
+                if (angles[0])
+                    max = (float)lcm / angles[0];
+                if (angles[1])
+                    max = std::max(max, (float)lcm / angles[1]);
+                if (angles[2])
+                    max = std::max(max, (float)lcm / angles[2]);
+
+                anim->mNumRotationKeys = (unsigned int)(max*fps);
+                anim->mRotationKeys = new aiQuatKey[anim->mNumRotationKeys];
+
+                // begin with a zero angle
+                aiVector3D angle;
+                for (unsigned int i = 0; i < anim->mNumRotationKeys;++i)
+                {
+                    // build the quaternion for the given euler angles
+                    aiQuatKey& q = anim->mRotationKeys[i];
+
+                    q.mValue = aiQuaternion(angle.x, angle.y, angle.z);
+                    q.mTime = (double)i;
+
+                    // increase the angle
+                    angle += in.direction;
+                }
+
+                // This animation is repeated and repeated ...
+                anim->mPostState = anim->mPreState = aiAnimBehaviour_REPEAT;
+            }
+            break;
+
+        case Animator::FLY_CIRCLE:
+            {
+                // -----------------------------------------------------
+                // Find out how much time we'll need to perform a
+                // full circle.
+                // -----------------------------------------------------
+                const double seconds = (1. / in.speed) / 1000.;
+                const double tdelta = 1000. / fps;
+
+                anim->mNumPositionKeys = (unsigned int) (fps * seconds);
+                anim->mPositionKeys = new aiVectorKey[anim->mNumPositionKeys];
+
+                // from Irrlicht, what else should we do than copying it?
+                aiVector3D vecU,vecV;
+                if (in.direction.y) {
+                    vecV = aiVector3D(50,0,0) ^ in.direction;
+                }
+                else vecV = aiVector3D(0,50,00) ^ in.direction;
+                vecV.Normalize();
+                vecU = (vecV ^ in.direction).Normalize();
+
+                // build the output keys
+                for (unsigned int i = 0; i < anim->mNumPositionKeys;++i)    {
+                    aiVectorKey& key = anim->mPositionKeys[i];
+                    key.mTime = i * tdelta;
+
+                    const ai_real t = (ai_real) ( in.speed * key.mTime );
+                    key.mValue = in.circleCenter  + in.circleRadius * ((vecU * std::cos(t)) + (vecV * std::sin(t)));
+                }
+
+                // This animation is repeated and repeated ...
+                anim->mPostState = anim->mPreState = aiAnimBehaviour_REPEAT;
+            }
+            break;
+
+        case Animator::FLY_STRAIGHT:
+            {
+                anim->mPostState = anim->mPreState = (in.loop ? aiAnimBehaviour_REPEAT : aiAnimBehaviour_CONSTANT);
+                const double seconds = in.timeForWay / 1000.;
+                const double tdelta = 1000. / fps;
+
+                anim->mNumPositionKeys = (unsigned int) (fps * seconds);
+                anim->mPositionKeys = new aiVectorKey[anim->mNumPositionKeys];
+
+                aiVector3D diff = in.direction - in.circleCenter;
+                const ai_real lengthOfWay = diff.Length();
+                diff.Normalize();
+
+                const double timeFactor = lengthOfWay / in.timeForWay;
+
+                // build the output keys
+                for (unsigned int i = 0; i < anim->mNumPositionKeys;++i)    {
+                    aiVectorKey& key = anim->mPositionKeys[i];
+                    key.mTime = i * tdelta;
+                    key.mValue = in.circleCenter + diff * ai_real(timeFactor * key.mTime);
+                }
+            }
+            break;
+
+        case Animator::FOLLOW_SPLINE:
+            {
+                // repeat outside the defined time range
+                anim->mPostState = anim->mPreState = aiAnimBehaviour_REPEAT;
+                const int size = (int)in.splineKeys.size();
+                if (!size)  {
+                    // We have no point in the spline. That's bad. Really bad.
+                    DefaultLogger::get()->warn("IRR: Spline animators with no points defined");
+
+                    delete anim;anim = NULL;
+                    break;
+                }
+                else if (size == 1) {
+                    // We have just one point in the spline so we don't need the full calculation
+                    anim->mNumPositionKeys = 1;
+                    anim->mPositionKeys = new aiVectorKey[anim->mNumPositionKeys];
+
+                    anim->mPositionKeys[0].mValue = in.splineKeys[0].mValue;
+                    anim->mPositionKeys[0].mTime  = 0.f;
+                    break;
+                }
+
+                unsigned int ticksPerFull = 15;
+                anim->mNumPositionKeys = (unsigned int) ( ticksPerFull * fps );
+                anim->mPositionKeys = new aiVectorKey[anim->mNumPositionKeys];
+
+                for (unsigned int i = 0; i < anim->mNumPositionKeys;++i)
+                {
+                    aiVectorKey& key = anim->mPositionKeys[i];
+
+                    const ai_real dt = (i * in.speed * ai_real( 0.001 ) );
+                    const ai_real u = dt - std::floor(dt);
+                    const int idx = (int)std::floor(dt) % size;
+
+                    // get the 4 current points to evaluate the spline
+                    const aiVector3D& p0 = in.splineKeys[ ClampSpline( idx - 1, size ) ].mValue;
+                    const aiVector3D& p1 = in.splineKeys[ ClampSpline( idx + 0, size ) ].mValue;
+                    const aiVector3D& p2 = in.splineKeys[ ClampSpline( idx + 1, size ) ].mValue;
+                    const aiVector3D& p3 = in.splineKeys[ ClampSpline( idx + 2, size ) ].mValue;
+
+                    // compute polynomials
+                    const ai_real u2 = u*u;
+                    const ai_real u3 = u2*2;
+
+                    const ai_real h1 = ai_real( 2.0 ) * u3 - ai_real( 3.0 ) * u2 + ai_real( 1.0 );
+                    const ai_real h2 = ai_real( -2.0 ) * u3 + ai_real( 3.0 ) * u3;
+                    const ai_real h3 = u3 - ai_real( 2.0 ) * u3;
+                    const ai_real h4 = u3 - u2;
+
+                    // compute the spline tangents
+                    const aiVector3D t1 = ( p2 - p0 ) * in.tightness;
+                    aiVector3D t2 = ( p3 - p1 ) * in.tightness;
+
+                    // and use them to get the interpolated point
+                    t2 = (h1 * p1 + p2 * h2 + t1 * h3 + h4 * t2);
+
+                    // build a simple translation matrix from it
+                    key.mValue = t2;
+                    key.mTime  = (double) i;
+                }
+            }
+            break;
+        default:
+            // UNKNOWN , OTHER
+            break;
+        };
+        if (anim)   {
+            anims.push_back(anim);
+            ++total;
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// This function is maybe more generic than we'd need it here
+void SetupMapping (aiMaterial* mat, aiTextureMapping mode, const aiVector3D& axis = aiVector3D(0.f,0.f,-1.f))
+{
+    // Check whether there are texture properties defined - setup
+    // the desired texture mapping mode for all of them and ignore
+    // all UV settings we might encounter. WE HAVE NO UVS!
+
+    std::vector<aiMaterialProperty*> p;
+    p.reserve(mat->mNumProperties+1);
+
+    for (unsigned int i = 0; i < mat->mNumProperties;++i)
+    {
+        aiMaterialProperty* prop = mat->mProperties[i];
+        if (!::strcmp( prop->mKey.data, "$tex.file"))   {
+            // Setup the mapping key
+            aiMaterialProperty* m = new aiMaterialProperty();
+            m->mKey.Set("$tex.mapping");
+            m->mIndex    = prop->mIndex;
+            m->mSemantic = prop->mSemantic;
+            m->mType     = aiPTI_Integer;
+
+            m->mDataLength = 4;
+            m->mData = new char[4];
+            *((int*)m->mData) = mode;
+
+            p.push_back(prop);
+            p.push_back(m);
+
+            // Setup the mapping axis
+            if (mode == aiTextureMapping_CYLINDER || mode == aiTextureMapping_PLANE || mode == aiTextureMapping_SPHERE) {
+                m = new aiMaterialProperty();
+                m->mKey.Set("$tex.mapaxis");
+                m->mIndex    = prop->mIndex;
+                m->mSemantic = prop->mSemantic;
+                m->mType     = aiPTI_Float;
+
+                m->mDataLength = 12;
+                m->mData = new char[12];
+                *((aiVector3D*)m->mData) = axis;
+                p.push_back(m);
+            }
+        }
+        else if (! ::strcmp( prop->mKey.data, "$tex.uvwsrc"))   {
+            delete mat->mProperties[i];
+        }
+        else p.push_back(prop);
+    }
+
+    if (p.empty())return;
+
+    // rebuild the output array
+    if (p.size() > mat->mNumAllocated)  {
+        delete[] mat->mProperties;
+        mat->mProperties = new aiMaterialProperty*[p.size()*2];
+
+        mat->mNumAllocated = static_cast<unsigned int>(p.size()*2);
+    }
+    mat->mNumProperties = (unsigned int)p.size();
+    ::memcpy(mat->mProperties,&p[0],sizeof(void*)*mat->mNumProperties);
+}
+
+// ------------------------------------------------------------------------------------------------
+void IRRImporter::GenerateGraph(Node* root,aiNode* rootOut ,aiScene* scene,
+    BatchLoader& batch,
+    std::vector<aiMesh*>&        meshes,
+    std::vector<aiNodeAnim*>&    anims,
+    std::vector<AttachmentInfo>& attach,
+    std::vector<aiMaterial*>&    materials,
+    unsigned int&                defMatIdx)
+{
+    unsigned int oldMeshSize = (unsigned int)meshes.size();
+    //unsigned int meshTrafoAssign = 0;
+
+    // Now determine the type of the node
+    switch (root->type)
+    {
+    case Node::ANIMMESH:
+    case Node::MESH:
+        {
+            if (!root->meshPath.length())
+                break;
+
+            // Get the loaded mesh from the scene and add it to
+            // the list of all scenes to be attached to the
+            // graph we're currently building
+            aiScene* scene = batch.GetImport(root->id);
+            if (!scene) {
+                DefaultLogger::get()->error("IRR: Unable to load external file: " + root->meshPath);
+                break;
+            }
+            attach.push_back(AttachmentInfo(scene,rootOut));
+
+            // Now combine the material we've loaded for this mesh
+            // with the real materials we got from the file. As we
+            // don't execute any pp-steps on the file, the numbers
+            // should be equal. If they are not, we can impossibly
+            // do this  ...
+            if (root->materials.size() != (unsigned int)scene->mNumMaterials)   {
+                DefaultLogger::get()->warn("IRR: Failed to match imported materials "
+                    "with the materials found in the IRR scene file");
+
+                break;
+            }
+            for (unsigned int i = 0; i < scene->mNumMaterials;++i)  {
+                // Delete the old material, we don't need it anymore
+                delete scene->mMaterials[i];
+
+                std::pair<aiMaterial*, unsigned int>& src = root->materials[i];
+                scene->mMaterials[i] = src.first;
+            }
+
+            // NOTE: Each mesh should have exactly one material assigned,
+            // but we do it in a separate loop if this behaviour changes
+            // in future.
+            for (unsigned int i = 0; i < scene->mNumMeshes;++i) {
+                // Process material flags
+                aiMesh* mesh = scene->mMeshes[i];
+
+
+                // If "trans_vertex_alpha" mode is enabled, search all vertex colors
+                // and check whether they have a common alpha value. This is quite
+                // often the case so we can simply extract it to a shared oacity
+                // value.
+                std::pair<aiMaterial*, unsigned int>& src = root->materials[mesh->mMaterialIndex];
+                aiMaterial* mat = (aiMaterial*)src.first;
+
+                if (mesh->HasVertexColors(0) && src.second & AI_IRRMESH_MAT_trans_vertex_alpha)
+                {
+                    bool bdo = true;
+                    for (unsigned int a = 1; a < mesh->mNumVertices;++a)    {
+
+                        if (mesh->mColors[0][a].a != mesh->mColors[0][a-1].a)   {
+                            bdo = false;
+                            break;
+                        }
+                    }
+                    if (bdo)    {
+                        DefaultLogger::get()->info("IRR: Replacing mesh vertex alpha with common opacity");
+
+                        for (unsigned int a = 0; a < mesh->mNumVertices;++a)
+                            mesh->mColors[0][a].a = 1.f;
+
+                        mat->AddProperty(& mesh->mColors[0][0].a, 1, AI_MATKEY_OPACITY);
+                    }
+                }
+
+                // If we have a second texture coordinate set and a second texture
+                // (either lightmap, normalmap, 2layered material) we need to
+                // setup the correct UV index for it. The texture can either
+                // be diffuse (lightmap & 2layer) or a normal map (normal & parallax)
+                if (mesh->HasTextureCoords(1))  {
+
+                    int idx = 1;
+                    if (src.second & (AI_IRRMESH_MAT_solid_2layer | AI_IRRMESH_MAT_lightmap))   {
+                        mat->AddProperty(&idx,1,AI_MATKEY_UVWSRC_DIFFUSE(0));
+                    }
+                    else if (src.second & AI_IRRMESH_MAT_normalmap_solid)   {
+                        mat->AddProperty(&idx,1,AI_MATKEY_UVWSRC_NORMALS(0));
+                    }
+                }
+            }
+        }
+        break;
+
+    case Node::LIGHT:
+    case Node::CAMERA:
+
+        // We're already finished with lights and cameras
+        break;
+
+
+    case Node::SPHERE:
+        {
+            // Generate the sphere model. Our input parameter to
+            // the sphere generation algorithm is the number of
+            // subdivisions of each triangle - but here we have
+            // the number of poylgons on a specific axis. Just
+            // use some hardcoded limits to approximate this ...
+            unsigned int mul = root->spherePolyCountX*root->spherePolyCountY;
+            if      (mul < 100)mul = 2;
+            else if (mul < 300)mul = 3;
+            else               mul = 4;
+
+            meshes.push_back(StandardShapes::MakeMesh(mul,
+                &StandardShapes::MakeSphere));
+
+            // Adjust scaling
+            root->scaling *= root->sphereRadius/2;
+
+            // Copy one output material
+            CopyMaterial(materials, root->materials, defMatIdx, meshes.back());
+
+            // Now adjust this output material - if there is a first texture
+            // set, setup spherical UV mapping around the Y axis.
+            SetupMapping ( (aiMaterial*) materials.back(), aiTextureMapping_SPHERE);
+        }
+        break;
+
+    case Node::CUBE:
+        {
+            // Generate an unit cube first
+            meshes.push_back(StandardShapes::MakeMesh(
+                &StandardShapes::MakeHexahedron));
+
+            // Adjust scaling
+            root->scaling *= root->sphereRadius;
+
+            // Copy one output material
+            CopyMaterial(materials, root->materials, defMatIdx, meshes.back());
+
+            // Now adjust this output material - if there is a first texture
+            // set, setup cubic UV mapping
+            SetupMapping ( (aiMaterial*) materials.back(), aiTextureMapping_BOX );
+        }
+        break;
+
+
+    case Node::SKYBOX:
+        {
+            // A skybox is defined by six materials
+            if (root->materials.size() < 6) {
+                DefaultLogger::get()->error("IRR: There should be six materials for a skybox");
+                break;
+            }
+
+            // copy those materials and generate 6 meshes for our new skybox
+            materials.reserve(materials.size() + 6);
+            for (unsigned int i = 0; i < 6;++i)
+                materials.insert(materials.end(),root->materials[i].first);
+
+            BuildSkybox(meshes,materials);
+
+            // *************************************************************
+            // Skyboxes will require a different code path for rendering,
+            // so there must be a way for the user to add special support
+            // for IRR skyboxes. We add a 'IRR.SkyBox_' prefix to the node.
+            // *************************************************************
+            root->name = "IRR.SkyBox_" + root->name;
+            DefaultLogger::get()->info("IRR: Loading skybox, this will "
+                "require special handling to be displayed correctly");
+        }
+        break;
+
+    case Node::TERRAIN:
+        {
+            // to support terrains, we'd need to have a texture decoder
+            DefaultLogger::get()->error("IRR: Unsupported node - TERRAIN");
+        }
+        break;
+    default:
+        // DUMMY
+        break;
+    };
+
+    // Check whether we added a mesh (or more than one ...). In this case
+    // we'll also need to attach it to the node
+    if (oldMeshSize != (unsigned int) meshes.size())    {
+
+        rootOut->mNumMeshes = (unsigned int)meshes.size() - oldMeshSize;
+        rootOut->mMeshes    = new unsigned int[rootOut->mNumMeshes];
+
+        for (unsigned int a = 0; a  < rootOut->mNumMeshes;++a)  {
+            rootOut->mMeshes[a] = oldMeshSize+a;
+        }
+    }
+
+    // Setup the name of this node
+    rootOut->mName.Set(root->name);
+
+    // Now compute the final local transformation matrix of the
+    // node from the given translation, rotation and scaling values.
+    // (the rotation is given in Euler angles, XYZ order)
+    //std::swap((float&)root->rotation.z,(float&)root->rotation.y);
+    rootOut->mTransformation.FromEulerAnglesXYZ(AI_DEG_TO_RAD(root->rotation) );
+
+    // apply scaling
+    aiMatrix4x4& mat = rootOut->mTransformation;
+    mat.a1 *= root->scaling.x;
+    mat.b1 *= root->scaling.x;
+    mat.c1 *= root->scaling.x;
+    mat.a2 *= root->scaling.y;
+    mat.b2 *= root->scaling.y;
+    mat.c2 *= root->scaling.y;
+    mat.a3 *= root->scaling.z;
+    mat.b3 *= root->scaling.z;
+    mat.c3 *= root->scaling.z;
+
+    // apply translation
+    mat.a4 += root->position.x;
+    mat.b4 += root->position.y;
+    mat.c4 += root->position.z;
+
+    // now compute animations for the node
+    ComputeAnimations(root,rootOut, anims);
+
+    // Add all children recursively. First allocate enough storage
+    // for them, then call us again
+    rootOut->mNumChildren = (unsigned int)root->children.size();
+    if (rootOut->mNumChildren)  {
+
+        rootOut->mChildren = new aiNode*[rootOut->mNumChildren];
+        for (unsigned int i = 0; i < rootOut->mNumChildren;++i) {
+
+            aiNode* node = rootOut->mChildren[i] =  new aiNode();
+            node->mParent = rootOut;
+            GenerateGraph(root->children[i],node,scene,batch,meshes,
+                anims,attach,materials,defMatIdx);
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Imports the given file into the given scene structure.
+void IRRImporter::InternReadFile( const std::string& pFile,
+    aiScene* pScene, IOSystem* pIOHandler)
+{
+    std::unique_ptr<IOStream> file( pIOHandler->Open( pFile));
+
+    // Check whether we can read from the file
+    if( file.get() == NULL)
+        throw DeadlyImportError( "Failed to open IRR file " + pFile + "");
+
+    // Construct the irrXML parser
+    CIrrXML_IOStreamReader st(file.get());
+    reader = createIrrXMLReader((IFileReadCallBack*) &st);
+
+    // The root node of the scene
+    Node* root = new Node(Node::DUMMY);
+    root->parent = NULL;
+    root->name = "<IRRSceneRoot>";
+
+    // Current node parent
+    Node* curParent = root;
+
+    // Scenegraph node we're currently working on
+    Node* curNode = NULL;
+
+    // List of output cameras
+    std::vector<aiCamera*> cameras;
+
+    // List of output lights
+    std::vector<aiLight*> lights;
+
+    // Batch loader used to load external models
+    BatchLoader batch(pIOHandler);
+//  batch.SetBasePath(pFile);
+
+    cameras.reserve(5);
+    lights.reserve(5);
+
+    bool inMaterials = false, inAnimator = false;
+    unsigned int guessedAnimCnt = 0, guessedMeshCnt = 0, guessedMatCnt = 0;
+
+    // Parse the XML file
+    while (reader->read())  {
+        switch (reader->getNodeType())  {
+        case EXN_ELEMENT:
+
+            if (!ASSIMP_stricmp(reader->getNodeName(),"node"))  {
+                // ***********************************************************************
+                /*  What we're going to do with the node depends
+                 *  on its type:
+                 *
+                 *  "mesh" - Load a mesh from an external file
+                 *  "cube" - Generate a cube
+                 *  "skybox" - Generate a skybox
+                 *  "light" - A light source
+                 *  "sphere" - Generate a sphere mesh
+                 *  "animatedMesh" - Load an animated mesh from an external file
+                 *    and join its animation channels with ours.
+                 *  "empty" - A dummy node
+                 *  "camera" - A camera
+                 *  "terrain" - a terrain node (data comes from a heightmap)
+                 *  "billboard", ""
+                 *
+                 *  Each of these nodes can be animated and all can have multiple
+                 *  materials assigned (except lights, cameras and dummies, of course).
+                 */
+                // ***********************************************************************
+                const char* sz = reader->getAttributeValueSafe("type");
+                Node* nd;
+                if (!ASSIMP_stricmp(sz,"mesh") || !ASSIMP_stricmp(sz,"octTree"))    {
+                    // OctTree's and meshes are treated equally
+                    nd = new Node(Node::MESH);
+                }
+                else if (!ASSIMP_stricmp(sz,"cube"))    {
+                    nd = new Node(Node::CUBE);
+                    ++guessedMeshCnt;
+                    // meshes.push_back(StandardShapes::MakeMesh(&StandardShapes::MakeHexahedron));
+                }
+                else if (!ASSIMP_stricmp(sz,"skybox"))  {
+                    nd = new Node(Node::SKYBOX);
+                    guessedMeshCnt += 6;
+                }
+                else if (!ASSIMP_stricmp(sz,"camera"))  {
+                    nd = new Node(Node::CAMERA);
+
+                    // Setup a temporary name for the camera
+                    aiCamera* cam = new aiCamera();
+                    cam->mName.Set( nd->name );
+                    cameras.push_back(cam);
+                }
+                else if (!ASSIMP_stricmp(sz,"light"))   {
+                    nd = new Node(Node::LIGHT);
+
+                    // Setup a temporary name for the light
+                    aiLight* cam = new aiLight();
+                    cam->mName.Set( nd->name );
+                    lights.push_back(cam);
+                }
+                else if (!ASSIMP_stricmp(sz,"sphere"))  {
+                    nd = new Node(Node::SPHERE);
+                    ++guessedMeshCnt;
+                }
+                else if (!ASSIMP_stricmp(sz,"animatedMesh"))    {
+                    nd = new Node(Node::ANIMMESH);
+                }
+                else if (!ASSIMP_stricmp(sz,"empty"))   {
+                    nd = new Node(Node::DUMMY);
+                }
+                else if (!ASSIMP_stricmp(sz,"terrain")) {
+                    nd = new Node(Node::TERRAIN);
+                }
+                else if (!ASSIMP_stricmp(sz,"billBoard"))   {
+                    // We don't support billboards, so ignore them
+                    DefaultLogger::get()->error("IRR: Billboards are not supported by Assimp");
+                    nd = new Node(Node::DUMMY);
+                }
+                else    {
+                    DefaultLogger::get()->warn("IRR: Found unknown node: " + std::string(sz));
+
+                    /*  We skip the contents of nodes we don't know.
+                     *  We parse the transformation and all animators
+                     *  and skip the rest.
+                     */
+                    nd = new Node(Node::DUMMY);
+                }
+
+                /* Attach the newly created node to the scenegraph
+                 */
+                curNode = nd;
+                nd->parent = curParent;
+                curParent->children.push_back(nd);
+            }
+            else if (!ASSIMP_stricmp(reader->getNodeName(),"materials"))    {
+                inMaterials = true;
+            }
+            else if (!ASSIMP_stricmp(reader->getNodeName(),"animators"))    {
+                inAnimator = true;
+            }
+            else if (!ASSIMP_stricmp(reader->getNodeName(),"attributes"))   {
+                /*  We should have a valid node here
+                 *  FIX: no ... the scene root node is also contained in an attributes block
+                 */
+                if (!curNode)   {
+#if 0
+                    DefaultLogger::get()->error("IRR: Encountered <attributes> element, but "
+                        "there is no node active");
+#endif
+                    continue;
+                }
+
+                Animator* curAnim = NULL;
+
+                // Materials can occur for nearly any type of node
+                if (inMaterials && curNode->type != Node::DUMMY)    {
+                    /*  This is a material description - parse it!
+                     */
+                    curNode->materials.push_back(std::pair< aiMaterial*, unsigned int > () );
+                    std::pair< aiMaterial*, unsigned int >& p = curNode->materials.back();
+
+                    p.first = ParseMaterial(p.second);
+
+                    ++guessedMatCnt;
+                    continue;
+                }
+                else if (inAnimator)    {
+                    /*  This is an animation path - add a new animator
+                     *  to the list.
+                     */
+                    curNode->animators.push_back(Animator());
+                    curAnim = & curNode->animators.back();
+
+                    ++guessedAnimCnt;
+                }
+
+                /*  Parse all elements in the attributes block
+                 *  and process them.
+                 */
+                while (reader->read())  {
+                    if (reader->getNodeType() == EXN_ELEMENT)   {
+                        if (!ASSIMP_stricmp(reader->getNodeName(),"vector3d"))  {
+                            VectorProperty prop;
+                            ReadVectorProperty(prop);
+
+                            if (inAnimator) {
+                                if (curAnim->type == Animator::ROTATION && prop.name == "Rotation") {
+                                    // We store the rotation euler angles in 'direction'
+                                    curAnim->direction = prop.value;
+                                }
+                                else if (curAnim->type == Animator::FOLLOW_SPLINE)  {
+                                    // Check whether the vector follows the PointN naming scheme,
+                                    // here N is the ONE-based index of the point
+                                    if (prop.name.length() >= 6 && prop.name.substr(0,5) == "Point")    {
+                                        // Add a new key to the list
+                                        curAnim->splineKeys.push_back(aiVectorKey());
+                                        aiVectorKey& key = curAnim->splineKeys.back();
+
+                                        // and parse its properties
+                                        key.mValue = prop.value;
+                                        key.mTime  = strtoul10(&prop.name[5]);
+                                    }
+                                }
+                                else if (curAnim->type == Animator::FLY_CIRCLE) {
+                                    if (prop.name == "Center")  {
+                                        curAnim->circleCenter = prop.value;
+                                    }
+                                    else if (prop.name == "Direction")  {
+                                        curAnim->direction = prop.value;
+
+                                        // From Irrlicht's source - a workaround for backward compatibility with Irrlicht 1.1
+                                        if (curAnim->direction == aiVector3D()) {
+                                            curAnim->direction = aiVector3D(0.f,1.f,0.f);
+                                        }
+                                        else curAnim->direction.Normalize();
+                                    }
+                                }
+                                else if (curAnim->type == Animator::FLY_STRAIGHT)   {
+                                    if (prop.name == "Start")   {
+                                        // We reuse the field here
+                                        curAnim->circleCenter = prop.value;
+                                    }
+                                    else if (prop.name == "End")    {
+                                        // We reuse the field here
+                                        curAnim->direction = prop.value;
+                                    }
+                                }
+                            }
+                            else    {
+                                if (prop.name == "Position")    {
+                                    curNode->position = prop.value;
+                                }
+                                else if (prop.name == "Rotation")   {
+                                    curNode->rotation = prop.value;
+                                }
+                                else if (prop.name == "Scale")  {
+                                    curNode->scaling = prop.value;
+                                }
+                                else if (Node::CAMERA == curNode->type)
+                                {
+                                    aiCamera* cam = cameras.back();
+                                    if (prop.name == "Target")  {
+                                        cam->mLookAt = prop.value;
+                                    }
+                                    else if (prop.name == "UpVector")   {
+                                        cam->mUp = prop.value;
+                                    }
+                                }
+                            }
+                        }
+                        else if (!ASSIMP_stricmp(reader->getNodeName(),"bool")) {
+                            BoolProperty prop;
+                            ReadBoolProperty(prop);
+
+                            if (inAnimator && curAnim->type == Animator::FLY_CIRCLE && prop.name == "Loop") {
+                                curAnim->loop = prop.value;
+                            }
+                        }
+                        else if (!ASSIMP_stricmp(reader->getNodeName(),"float"))    {
+                            FloatProperty prop;
+                            ReadFloatProperty(prop);
+
+                            if (inAnimator) {
+                                // The speed property exists for several animators
+                                if (prop.name == "Speed")   {
+                                    curAnim->speed = prop.value;
+                                }
+                                else if (curAnim->type == Animator::FLY_CIRCLE && prop.name == "Radius")    {
+                                    curAnim->circleRadius = prop.value;
+                                }
+                                else if (curAnim->type == Animator::FOLLOW_SPLINE && prop.name == "Tightness")  {
+                                    curAnim->tightness = prop.value;
+                                }
+                            }
+                            else    {
+                                if (prop.name == "FramesPerSecond" && Node::ANIMMESH == curNode->type)  {
+                                    curNode->framesPerSecond = prop.value;
+                                }
+                                else if (Node::CAMERA == curNode->type) {
+                                    /*  This is the vertical, not the horizontal FOV.
+                                    *  We need to compute the right FOV from the
+                                    *  screen aspect which we don't know yet.
+                                    */
+                                    if (prop.name == "Fovy")    {
+                                        cameras.back()->mHorizontalFOV  = prop.value;
+                                    }
+                                    else if (prop.name == "Aspect") {
+                                        cameras.back()->mAspect = prop.value;
+                                    }
+                                    else if (prop.name == "ZNear")  {
+                                        cameras.back()->mClipPlaneNear = prop.value;
+                                    }
+                                    else if (prop.name == "ZFar")   {
+                                        cameras.back()->mClipPlaneFar = prop.value;
+                                    }
+                                }
+                                else if (Node::LIGHT == curNode->type)  {
+                                    /*  Additional light information
+                                     */
+                                    if (prop.name == "Attenuation") {
+                                        lights.back()->mAttenuationLinear  = prop.value;
+                                    }
+                                    else if (prop.name == "OuterCone")  {
+                                        lights.back()->mAngleOuterCone =  AI_DEG_TO_RAD( prop.value );
+                                    }
+                                    else if (prop.name == "InnerCone")  {
+                                        lights.back()->mAngleInnerCone =  AI_DEG_TO_RAD( prop.value );
+                                    }
+                                }
+                                // radius of the sphere to be generated -
+                                // or alternatively, size of the cube
+                                else if ((Node::SPHERE == curNode->type && prop.name == "Radius")
+                                    || (Node::CUBE == curNode->type   && prop.name == "Size" )) {
+
+                                        curNode->sphereRadius = prop.value;
+                                }
+                            }
+                        }
+                        else if (!ASSIMP_stricmp(reader->getNodeName(),"int"))  {
+                            IntProperty prop;
+                            ReadIntProperty(prop);
+
+                            if (inAnimator) {
+                                if (curAnim->type == Animator::FLY_STRAIGHT && prop.name == "TimeForWay")   {
+                                    curAnim->timeForWay = prop.value;
+                                }
+                            }
+                            else    {
+                                // sphere polgon numbers in each direction
+                                if (Node::SPHERE == curNode->type)  {
+
+                                    if (prop.name == "PolyCountX")  {
+                                        curNode->spherePolyCountX = prop.value;
+                                    }
+                                    else if (prop.name == "PolyCountY") {
+                                        curNode->spherePolyCountY = prop.value;
+                                    }
+                                }
+                            }
+                        }
+                        else if (!ASSIMP_stricmp(reader->getNodeName(),"string") ||!ASSIMP_stricmp(reader->getNodeName(),"enum"))   {
+                            StringProperty prop;
+                            ReadStringProperty(prop);
+                            if (prop.value.length())    {
+                                if (prop.name == "Name")    {
+                                    curNode->name = prop.value;
+
+                                    /*  If we're either a camera or a light source
+                                     *  we need to update the name in the aiLight/
+                                     *  aiCamera structure, too.
+                                     */
+                                    if (Node::CAMERA == curNode->type)  {
+                                        cameras.back()->mName.Set(prop.value);
+                                    }
+                                    else if (Node::LIGHT == curNode->type)  {
+                                        lights.back()->mName.Set(prop.value);
+                                    }
+                                }
+                                else if (Node::LIGHT == curNode->type && "LightType" == prop.name)
+                                {
+                                    if (prop.value == "Spot")
+                                        lights.back()->mType = aiLightSource_SPOT;
+                                    else if (prop.value == "Point")
+                                        lights.back()->mType = aiLightSource_POINT;
+                                    else if (prop.value == "Directional")
+                                        lights.back()->mType = aiLightSource_DIRECTIONAL;
+                                    else
+                                    {
+                                        // We won't pass the validation with aiLightSourceType_UNDEFINED,
+                                        // so we remove the light and replace it with a silly dummy node
+                                        delete lights.back();
+                                        lights.pop_back();
+                                        curNode->type = Node::DUMMY;
+
+                                        DefaultLogger::get()->error("Ignoring light of unknown type: " + prop.value);
+                                    }
+                                }
+                                else if ((prop.name == "Mesh" && Node::MESH == curNode->type) ||
+                                    Node::ANIMMESH == curNode->type)
+                                {
+                                    /*  This is the file name of the mesh - either
+                                     *  animated or not. We need to make sure we setup
+                                     *  the correct postprocessing settings here.
+                                     */
+                                    unsigned int pp = 0;
+                                    BatchLoader::PropertyMap map;
+
+                                    /* If the mesh is a static one remove all animations from the impor data
+                                     */
+                                    if (Node::ANIMMESH != curNode->type)    {
+                                        pp |= aiProcess_RemoveComponent;
+                                        SetGenericProperty<int>(map.ints,AI_CONFIG_PP_RVC_FLAGS,
+                                            aiComponent_ANIMATIONS | aiComponent_BONEWEIGHTS);
+                                    }
+
+                                    /*  TODO: maybe implement the protection against recursive
+                                    *  loading calls directly in BatchLoader? The current
+                                    *  implementation is not absolutely safe. A LWS and an IRR
+                                    *  file referencing each other *could* cause the system to
+                                    *  recurse forever.
+                                    */
+
+                                    const std::string extension = GetExtension(prop.value);
+                                    if ("irr" == extension) {
+                                        DefaultLogger::get()->error("IRR: Can't load another IRR file recursively");
+                                    }
+                                    else
+                                    {
+                                        curNode->id = batch.AddLoadRequest(prop.value,pp,&map);
+                                        curNode->meshPath = prop.value;
+                                    }
+                                }
+                                else if (inAnimator && prop.name == "Type")
+                                {
+                                    // type of the animator
+                                    if (prop.value == "rotation")   {
+                                        curAnim->type = Animator::ROTATION;
+                                    }
+                                    else if (prop.value == "flyCircle") {
+                                        curAnim->type = Animator::FLY_CIRCLE;
+                                    }
+                                    else if (prop.value == "flyStraight")   {
+                                        curAnim->type = Animator::FLY_CIRCLE;
+                                    }
+                                    else if (prop.value == "followSpline")  {
+                                        curAnim->type = Animator::FOLLOW_SPLINE;
+                                    }
+                                    else    {
+                                        DefaultLogger::get()->warn("IRR: Ignoring unknown animator: "
+                                            + prop.value);
+
+                                        curAnim->type = Animator::UNKNOWN;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    else if (reader->getNodeType() == EXN_ELEMENT_END && !ASSIMP_stricmp(reader->getNodeName(),"attributes"))   {
+                        break;
+                    }
+                }
+            }
+            break;
+
+        case EXN_ELEMENT_END:
+
+            // If we reached the end of a node, we need to continue processing its parent
+            if (!ASSIMP_stricmp(reader->getNodeName(),"node"))  {
+                if (!curNode)   {
+                    // currently is no node set. We need to go
+                    // back in the node hierarchy
+                    if (!curParent) {
+                        curParent = root;
+                        DefaultLogger::get()->error("IRR: Too many closing <node> elements");
+                    }
+                    else curParent = curParent->parent;
+                }
+                else curNode = NULL;
+            }
+            // clear all flags
+            else if (!ASSIMP_stricmp(reader->getNodeName(),"materials"))    {
+                inMaterials = false;
+            }
+            else if (!ASSIMP_stricmp(reader->getNodeName(),"animators"))    {
+                inAnimator = false;
+            }
+            break;
+
+        default:
+            // GCC complains that not all enumeration values are handled
+            break;
+        }
+    }
+
+    /*  Now iterate through all cameras and compute their final (horizontal) FOV
+     */
+    for (aiCamera *cam : cameras) {
+
+        // screen aspect could be missing
+        if (cam->mAspect)   {
+            cam->mHorizontalFOV *= cam->mAspect;
+        }
+        else DefaultLogger::get()->warn("IRR: Camera aspect is not given, can't compute horizontal FOV");
+    }
+
+    batch.LoadAll();
+
+    /* Allocate a tempoary scene data structure
+     */
+    aiScene* tempScene = new aiScene();
+    tempScene->mRootNode = new aiNode();
+    tempScene->mRootNode->mName.Set("<IRRRoot>");
+
+    /* Copy the cameras to the output array
+     */
+    if (!cameras.empty())   {
+        tempScene->mNumCameras = (unsigned int)cameras.size();
+        tempScene->mCameras = new aiCamera*[tempScene->mNumCameras];
+        ::memcpy(tempScene->mCameras,&cameras[0],sizeof(void*)*tempScene->mNumCameras);
+    }
+
+    /* Copy the light sources to the output array
+     */
+    if (!lights.empty())    {
+        tempScene->mNumLights = (unsigned int)lights.size();
+        tempScene->mLights = new aiLight*[tempScene->mNumLights];
+        ::memcpy(tempScene->mLights,&lights[0],sizeof(void*)*tempScene->mNumLights);
+    }
+
+    // temporary data
+    std::vector< aiNodeAnim*>       anims;
+    std::vector< aiMaterial*>       materials;
+    std::vector< AttachmentInfo >   attach;
+    std::vector<aiMesh*>            meshes;
+
+    // try to guess how much storage we'll need
+    anims.reserve     (guessedAnimCnt + (guessedAnimCnt >> 2));
+    meshes.reserve    (guessedMeshCnt + (guessedMeshCnt >> 2));
+    materials.reserve (guessedMatCnt  + (guessedMatCnt >> 2));
+
+    /* Now process our scenegraph recursively: generate final
+     * meshes and generate animation channels for all nodes.
+     */
+    unsigned int defMatIdx = UINT_MAX;
+    GenerateGraph(root,tempScene->mRootNode, tempScene,
+        batch, meshes, anims, attach, materials, defMatIdx);
+
+    if (!anims.empty())
+    {
+        tempScene->mNumAnimations = 1;
+        tempScene->mAnimations = new aiAnimation*[tempScene->mNumAnimations];
+        aiAnimation* an = tempScene->mAnimations[0] = new aiAnimation();
+
+        // ***********************************************************
+        // This is only the global animation channel of the scene.
+        // If there are animated models, they will have separate
+        // animation channels in the scene. To display IRR scenes
+        // correctly, users will need to combine the global anim
+        // channel with all the local animations they want to play
+        // ***********************************************************
+        an->mName.Set("Irr_GlobalAnimChannel");
+
+        // copy all node animation channels to the global channel
+        an->mNumChannels = (unsigned int)anims.size();
+        an->mChannels = new aiNodeAnim*[an->mNumChannels];
+        ::memcpy(an->mChannels, & anims [0], sizeof(void*)*an->mNumChannels);
+    }
+    if (!meshes.empty())    {
+        // copy all meshes to the temporary scene
+        tempScene->mNumMeshes = (unsigned int)meshes.size();
+        tempScene->mMeshes = new aiMesh*[tempScene->mNumMeshes];
+        ::memcpy(tempScene->mMeshes,&meshes[0],tempScene->mNumMeshes*
+            sizeof(void*));
+    }
+
+    /* Copy all materials to the output array
+     */
+    if (!materials.empty()) {
+        tempScene->mNumMaterials = (unsigned int)materials.size();
+        tempScene->mMaterials = new aiMaterial*[tempScene->mNumMaterials];
+        ::memcpy(tempScene->mMaterials,&materials[0],sizeof(void*)*
+            tempScene->mNumMaterials);
+    }
+
+    /*  Now merge all sub scenes and attach them to the correct
+     *  attachment points in the scenegraph.
+     */
+    SceneCombiner::MergeScenes(&pScene,tempScene,attach,
+        AI_INT_MERGE_SCENE_GEN_UNIQUE_NAMES | (!configSpeedFlag ? (
+        AI_INT_MERGE_SCENE_GEN_UNIQUE_NAMES_IF_NECESSARY | AI_INT_MERGE_SCENE_GEN_UNIQUE_MATNAMES) : 0));
+
+
+    /*  If we have no meshes | no materials now set the INCOMPLETE
+     *  scene flag. This is necessary if we failed to load all
+     *  models from external files
+     */
+    if (!pScene->mNumMeshes || !pScene->mNumMaterials)  {
+        DefaultLogger::get()->warn("IRR: No meshes loaded, setting AI_SCENE_FLAGS_INCOMPLETE");
+        pScene->mFlags |= AI_SCENE_FLAGS_INCOMPLETE;
+    }
+
+    /* Finished ... everything destructs automatically and all
+     * temporary scenes have already been deleted by MergeScenes()
+     */
+    return;
+}
+
+#endif // !! ASSIMP_BUILD_NO_IRR_IMPORTER