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Fixed some minor issues in the AC loader. However, it still crashes with large and complicated models. Line handling is complete.

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Moved the code to find degenerated primitives to a separate step that is not anymore active by default. 
The FindInvalidData-Step isn't active by default now. It hast a flag and must be explicitly requested.
Added line and point handling code to the CalcTangentsStep - not yet tested.
Added support for the Sense 8 (WorldToolKit) NFF file format. The format uses the same file extension as the "Neutral File Format" (and is implemented in the same loader). Seems to work well, added test files for it.
Added itoa10 function - so we have itoa on all platforms.
Small optimizations in the SortByPType step.
Fixed the material validation: textured meshes without uv coords cause a warning now.
Fixed a minor isses with the OFF loader.
Added empty unit tests for the new steps - to be filled in the next days. 
Added SceneCombiner.cpp. It contains utilities to join meshes and scenes. The latter will be needed by the LWS loader (LWS files contain references to external LWO files and the LWO loader is already to complicated that it would make sense to add an additional code path to it). Mesh joining is needed by some pp steps, but the code has not yet been moved to its new location.
Added WIP light & camera support to the ASE loader. Works for the moment, but there's much missing. ASE parser refactored, the code is still quite long but at least cleaner. Fixed a bug that caused ASE to import invalid texture coordinates.
Makefiles and VC8 solution are up-to-date. The rest isn't.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@192 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
This commit is contained in:
aramis_acg
2008-10-22 20:06:16 +00:00
parent 013ff599a5
commit 383a614931
55 changed files with 22566 additions and 879 deletions
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582
code/NFFLoader.cpp
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@@ -48,7 +48,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "ParsingUtils.h"
#include "StandardShapes.h"
#include "fast_atof.h"
#include "RemoveComments.h"
using namespace Assimp;
@@ -75,18 +75,13 @@ bool NFFImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler) const
std::string extension = pFile.substr( pos);
// extensions: enff and nff
if (!extension.length() || extension[0] != '.')return false;
if (extension.length() == 4)
{
return !(extension[1] != 'n' && extension[1] != 'N' ||
extension[2] != 'f' && extension[2] != 'F' ||
extension[3] != 'f' && extension[3] != 'F');
}
else return !( extension.length() != 5 ||
extension[1] != 'e' && extension[1] != 'E' ||
extension[2] != 'n' && extension[2] != 'N' ||
extension[3] != 'f' && extension[3] != 'F' ||
extension[4] != 'f' && extension[4] != 'F');
for( std::string::iterator it = extension.begin(); it != extension.end(); ++it)
*it = tolower( *it);
if( extension == ".nff" || extension == ".enff")
return true;
return false;
}
// ------------------------------------------------------------------------------------------------
@@ -110,6 +105,122 @@ bool NFFImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler) const
currentMesh.radius = radius; \
currentMesh.center = center;
// ------------------------------------------------------------------------------------------------
#define AI_NFF2_GET_NEXT_TOKEN() \
do \
{ \
if (!GetNextLine(buffer,line)) \
{DefaultLogger::get()->warn("NFF2: Unexpected EOF, can't read next token");break;} \
SkipSpaces(line,&sz); \
} \
while(IsLineEnd(*sz))
// ------------------------------------------------------------------------------------------------
// Loads the materail table for the NFF2 file format from an external file
void NFFImporter::LoadNFF2MaterialTable(std::vector<ShadingInfo>& output,
const std::string& path, IOSystem* pIOHandler)
{
boost::scoped_ptr<IOStream> file( pIOHandler->Open( path, "rb"));
// Check whether we can read from the file
if( !file.get())
{
DefaultLogger::get()->error("NFF2: Unable to open material library " + path + ".");
return;
}
// get the size of the file
const unsigned int m = (unsigned int)file->FileSize();
// allocate storage and copy the contents of the file to a memory buffer
// (terminate it with zero)
std::vector<char> mBuffer2(m+1);
file->Read(&mBuffer2[0],m,1);
const char* buffer = &mBuffer2[0];
mBuffer2[m] = '\0';
// First of all: remove all comments from the file
CommentRemover::RemoveLineComments("//",&mBuffer2[0]);
// The file should start with the magic sequence "mat"
if (!TokenMatch(buffer,"mat",3))
{
DefaultLogger::get()->error("NFF2: Not a valid material library " + path + ".");
return;
}
ShadingInfo* curShader = NULL;
// No read the file line per line
char line[4096];
const char* sz;
while (GetNextLine(buffer,line))
{
SkipSpaces(line,&sz);
// 'version' defines the version of the file format
if (TokenMatch(sz,"version",7))
{
DefaultLogger::get()->info("NFF (Sense8) material library file format: " + std::string(sz));
}
// 'matdef' starts a new material in the file
else if (TokenMatch(sz,"matdef",6))
{
// add a new material to the list
output.push_back( ShadingInfo() );
curShader = & output.back();
// parse the name of the material
}
else if (!TokenMatch(sz,"valid",5))
{
// check whether we have an active material at the moment
if (!IsLineEnd(*sz))
{
if (!curShader)
{
DefaultLogger::get()->error(std::string("NFF2 material library: Found element ") +
sz + "but there is no active material");
continue;
}
}
else continue;
// now read the material property and determine its type
aiColor3D c;
if (TokenMatch(sz,"ambient",7))
{
AI_NFF_PARSE_TRIPLE(c);
curShader->ambient = c;
}
else if (TokenMatch(sz,"diffuse",7) || TokenMatch(sz,"ambientdiffuse",14) /* correct? */)
{
AI_NFF_PARSE_TRIPLE(c);
curShader->diffuse = c;
}
else if (TokenMatch(sz,"specular",8))
{
AI_NFF_PARSE_TRIPLE(c);
curShader->specular = c;
}
else if (TokenMatch(sz,"emission",8))
{
AI_NFF_PARSE_TRIPLE(c);
curShader->emissive = c;
}
else if (TokenMatch(sz,"shininess",9))
{
AI_NFF_PARSE_FLOAT(curShader->shininess);
}
else if (TokenMatch(sz,"opacity",7))
{
AI_NFF_PARSE_FLOAT(curShader->opacity);
}
}
}
}
// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void NFFImporter::InternReadFile( const std::string& pFile,
@@ -118,7 +229,7 @@ void NFFImporter::InternReadFile( const std::string& pFile,
boost::scoped_ptr<IOStream> file( pIOHandler->Open( pFile, "rb"));
// Check whether we can read from the file
if( file.get() == NULL)
if( !file.get())
throw new ImportErrorException( "Failed to open NFF file " + pFile + ".");
unsigned int m = (unsigned int)file->FileSize();
@@ -142,7 +253,7 @@ void NFFImporter::InternReadFile( const std::string& pFile,
// camera parameters
aiVector3D camPos, camUp(0.f,1.f,0.f), camLookAt(0.f,0.f,1.f);
float angle;
float angle = 45.f;
aiVector2D resolution;
bool hasCam = false;
@@ -172,16 +283,24 @@ void NFFImporter::InternReadFile( const std::string& pFile,
// check whether this is the NFF2 file format
if (TokenMatch(buffer,"nff",3))
{
const float qnan = std::numeric_limits<float>::quiet_NaN();
const aiColor4D cQNAN = aiColor4D (qnan,0.f,0.f,1.f);
const aiVector3D vQNAN = aiVector3D(qnan,0.f,0.f);
// another NFF file format ... just a raw parser has been implemented
// no support for textures yet, I don't think it is worth the effort
// no support for further details, I don't think it is worth the effort
// http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/nff/nff2.html
// http://www.netghost.narod.ru/gff/graphics/summary/sense8.htm
// First of all: remove all comments from the file
CommentRemover::RemoveLineComments("//",&mBuffer2[0]);
while (GetNextLine(buffer,line))
{
sz = line;
SkipSpaces(line,&sz);
if (TokenMatch(sz,"version",7))
{
DefaultLogger::get()->info("NFF (alt.) file format: " + std::string(sz));
DefaultLogger::get()->info("NFF (Sense8) file format: " + std::string(sz));
}
else if (TokenMatch(sz,"viewpos",7))
{
@@ -193,79 +312,341 @@ void NFFImporter::InternReadFile( const std::string& pFile,
AI_NFF_PARSE_TRIPLE(camLookAt);
hasCam = true;
}
else if (TokenMatch(sz,"//",2))
// This starts a new object section
else if (!IsSpaceOrNewLine(*sz))
{
// comment ...
DefaultLogger::get()->info(sz);
}
else if (!IsSpace(*sz))
{
// must be a new object
meshes.push_back(MeshInfo(PatchType_Simple));
MeshInfo& mesh = meshes.back();
unsigned int subMeshIdx = 0;
if (!GetNextLine(buffer,line))
{DefaultLogger::get()->warn("NFF2: Unexpected EOF, can't read number of vertices");break;}
// read the name of the object, skip all spaces
// at the end of it.
const char* sz3 = sz;
while (!IsSpaceOrNewLine(*sz))++sz;
std::string objectName = std::string(sz3,(unsigned int)(sz-sz3));
SkipSpaces(line,&sz);
const unsigned int objStart = (unsigned int)meshes.size();
// There could be a material table in a separate file
std::vector<ShadingInfo> materialTable;
while (true)
{
AI_NFF2_GET_NEXT_TOKEN();
// material table - an external file
if (TokenMatch(sz,"mtable",6))
{
SkipSpaces(&sz);
sz3 = sz;
while (!IsSpaceOrNewLine(*sz))++sz;
const unsigned int diff = (unsigned int)(sz-sz3);
if (!diff)DefaultLogger::get()->warn("NFF2: Found empty mtable token");
else
{
// The material table has the file extension .mat.
// If it is not there, we need to append it
std::string path = std::string(sz3,diff);
if(std::string::npos == path.find_last_of(".mat"))
{
path.append(".mat");
}
// Now extract the working directory from the path to
// this file and append the material library filename
// to it.
std::string::size_type s;
if ((std::string::npos == (s = path.find_last_of('\\')) || !s) &&
(std::string::npos == (s = path.find_last_of('/')) || !s) )
{
s = pFile.find_last_of('\\');
if (std::string::npos == s)s = pFile.find_last_of('/');
if (std::string::npos != s)
{
path = pFile.substr(0,s+1) + path;
}
}
LoadNFF2MaterialTable(materialTable,path,pIOHandler);
}
}
else break;
}
// read the numbr of vertices
unsigned int num = ::strtol10(sz,&sz);
std::vector<aiVector3D> tempPositions;
std::vector<aiVector3D> outPositions;
mesh.vertices.reserve(num*3);
mesh.colors.reserve (num*3);
tempPositions.reserve(num);
// temporary storage
std::vector<aiColor4D> tempColors;
std::vector<aiVector3D> tempPositions,tempTextureCoords,tempNormals;
bool hasNormals = false,hasUVs = false,hasColor = false;
tempPositions.reserve (num);
tempColors.reserve (num);
tempNormals.reserve (num);
tempTextureCoords.reserve (num);
for (unsigned int i = 0; i < num; ++i)
{
if (!GetNextLine(buffer,line))
{DefaultLogger::get()->warn("NFF2: Unexpected EOF, can't read vertices");break;}
sz = line;
AI_NFF2_GET_NEXT_TOKEN();
aiVector3D v;
AI_NFF_PARSE_TRIPLE(v);
tempPositions.push_back(v);
}
if (!GetNextLine(buffer,line))
{DefaultLogger::get()->warn("NFF2: Unexpected EOF, can't read number of faces");break;}
if (!num)throw new ImportErrorException("NFF2: There are zero vertices");
SkipSpaces(line,&sz);
num = ::strtol10(sz,&sz);
mesh.faces.reserve(num);
for (unsigned int i = 0; i < num; ++i)
{
if (!GetNextLine(buffer,line))
{DefaultLogger::get()->warn("NFF2: Unexpected EOF, can't read faces");break;}
SkipSpaces(line,&sz);
unsigned int idx, numIdx = ::strtol10(sz,&sz);
if (numIdx)
// parse all other attributes in the line
while (true)
{
mesh.faces.push_back(numIdx);
for (unsigned int a = 0; a < numIdx;++a)
SkipSpaces(&sz);
if (IsLineEnd(*sz))break;
// color definition
if (TokenMatch(sz,"0x",2))
{
SkipSpaces(sz,&sz);
idx = ::strtol10(sz,&sz);
if (idx >= (unsigned int)tempPositions.size())
{
DefaultLogger::get()->error("NFF2: Index overflow");
idx = 0;
}
mesh.vertices.push_back(tempPositions[idx]);
hasColor = true;
register unsigned int numIdx = ::strtol16(sz,&sz);
aiColor4D clr;
clr.a = 1.f;
// 0xRRGGBB
clr.r = ((numIdx >> 16u) & 0xff) / 255.f;
clr.g = ((numIdx >> 8u) & 0xff) / 255.f;
clr.b = ((numIdx) & 0xff) / 255.f;
tempColors.push_back(clr);
}
// normal vector
else if (TokenMatch(sz,"norm",4))
{
hasNormals = true;
AI_NFF_PARSE_TRIPLE(v);
tempNormals.push_back(v);
}
// UV coordinate
else if (TokenMatch(sz,"uv",2))
{
hasUVs = true;
AI_NFF_PARSE_FLOAT(v.x);
AI_NFF_PARSE_FLOAT(v.y);
v.z = 0.f;
tempTextureCoords.push_back(v);
}
}
SkipSpaces(sz,&sz);
idx = ::strtol_cppstyle(sz,&sz);
aiColor4D clr;
clr.r = ((numIdx >> 8u) & 0xf) / 16.f;
clr.g = ((numIdx >> 4u) & 0xf) / 16.f;
clr.b = ((numIdx) & 0xf) / 16.f;
clr.a = 1.f;
for (unsigned int a = 0; a < numIdx;++a)
mesh.colors.push_back(clr);
// fill in dummies for all attributes that have not been set
if (tempNormals.size() != tempPositions.size())
tempNormals.push_back(vQNAN);
if (tempTextureCoords.size() != tempPositions.size())
tempTextureCoords.push_back(vQNAN);
if (tempColors.size() != tempPositions.size())
tempColors.push_back(cQNAN);
}
AI_NFF2_GET_NEXT_TOKEN();
if (!num)throw new ImportErrorException("NFF2: There are zero vertices");
num = ::strtol10(sz,&sz);
std::vector<unsigned int> tempIdx;
tempIdx.reserve(10);
for (unsigned int i = 0; i < num; ++i)
{
AI_NFF2_GET_NEXT_TOKEN();
SkipSpaces(line,&sz);
unsigned int numIdx = ::strtol10(sz,&sz);
// read all faces indices
if (numIdx)
{
// mesh.faces.push_back(numIdx);
// tempIdx.erase(tempIdx.begin(),tempIdx.end());
tempIdx.resize(numIdx);
for (unsigned int a = 0; a < numIdx;++a)
{
SkipSpaces(sz,&sz);
m = ::strtol10(sz,&sz);
if (m >= (unsigned int)tempPositions.size())
{
DefaultLogger::get()->error("NFF2: Vertex index overflow");
m= 0;
}
// mesh.vertices.push_back (tempPositions[idx]);
tempIdx[a] = m;
}
}
// build a temporary shader object for the face.
ShadingInfo shader;
unsigned int matIdx = 0;
// white material color - we have vertex colors
shader.color = aiColor3D(1.f,1.f,1.f);
aiColor4D c = aiColor4D(1.f,1.f,1.f,1.f);
while (true)
{
SkipSpaces(sz,&sz);
if(IsLineEnd(*sz))break;
// per-polygon colors
if (TokenMatch(sz,"0x",2))
{
hasColor = true;
const char* sz2 = sz;
numIdx = ::strtol16(sz,&sz);
const unsigned int diff = (unsigned int)(sz-sz2);
// 0xRRGGBB
if (diff > 3)
{
c.r = ((numIdx >> 16u) & 0xff) / 255.f;
c.g = ((numIdx >> 8u) & 0xff) / 255.f;
c.b = ((numIdx) & 0xff) / 255.f;
}
// 0xRGB
else
{
c.r = ((numIdx >> 8u) & 0xf) / 16.f;
c.g = ((numIdx >> 4u) & 0xf) / 16.f;
c.b = ((numIdx) & 0xf) / 16.f;
}
}
// TODO - implement texture mapping here
#if 0
// mirror vertex texture coordinate?
else if (TokenMatch(sz,"mirror",6))
{
}
// texture coordinate scaling
else if (TokenMatch(sz,"scale",5))
{
}
// texture coordinate translation
else if (TokenMatch(sz,"trans",5))
{
}
// texture coordinate rotation angle
else if (TokenMatch(sz,"rot",3))
{
}
#endif
// texture file name for this polygon + mapping information
else if ('_' == sz[0])
{
// get mapping information
switch (sz[1])
{
case 'v':
case 'V':
shader.shaded = false;
break;
case 't':
case 'T':
case 'u':
case 'U':
DefaultLogger::get()->warn("Unsupported NFF2 texture attribute: trans");
};
if (!sz[1] || '_' != sz[2])
{
DefaultLogger::get()->warn("NFF2: Expected underscore after texture attributes");
continue;
}
const char* sz2 = sz+3;
while (!IsSpaceOrNewLine( *sz ))++sz;
const unsigned int diff = (unsigned int)(sz-sz2);
if (diff)shader.texFile = std::string(sz2,diff);
}
// Two-sided material?
else if (TokenMatch(sz,"both",4))
{
shader.twoSided = true;
}
// Material ID?
else if (!materialTable.empty() && TokenMatch(sz,"matid",5))
{
SkipSpaces(&sz);
matIdx = ::strtol10(sz,&sz);
if (matIdx >= materialTable.size())
{
DefaultLogger::get()->error("NFF2: Material index overflow.");
matIdx = 0;
}
// now combine our current shader with the shader we
// read from the material table.
ShadingInfo& mat = materialTable[matIdx];
shader.ambient = mat.ambient;
shader.diffuse = mat.diffuse;
shader.emissive = mat.emissive;
shader.opacity = mat.opacity;
shader.specular = mat.specular;
shader.shininess = mat.shininess;
}
else SkipToken(sz);
}
// search the list of all shaders we have for this object whether
// there is an identical one. In this case, we append our mesh
// data to it.
MeshInfo* mesh = NULL;
for (std::vector<MeshInfo>::iterator it = meshes.begin() + objStart, end = meshes.end();
it != end; ++it)
{
if ((*it).shader == shader && (*it).matIndex == matIdx)
{
// we have one, we can append our data to it
mesh = &(*it);
}
}
if (!mesh)
{
meshes.push_back(MeshInfo(PatchType_Simple,false));
mesh = &meshes.back();
mesh->matIndex = matIdx;
// We need to add a new mesh to the list. We assign
// an unique name to it to make sure the scene will
// pass the validation step for the moment.
// TODO: fix naming of objects in the scenegraph later
if (objectName.length())
{
::strcpy(mesh->name,objectName.c_str());
itoa10(&mesh->name[objectName.length()],30,subMeshIdx++);
}
// copy the shader to the mesh.
mesh->shader = shader;
}
// fill the mesh with data
if (!tempIdx.empty())
{
mesh->faces.push_back((unsigned int)tempIdx.size());
for (std::vector<unsigned int>::const_iterator it = tempIdx.begin(), end = tempIdx.end();
it != end;++it)
{
m = *it;
// copy colors -vertex color specifications override polygon color specifications
if (hasColor)
{
const aiColor4D& clr = tempColors[m];
mesh->colors.push_back((is_qnan( clr.r ) ? c : clr));
}
// positions should always be there
mesh->vertices.push_back (tempPositions[m]);
// copy normal vectors
if (hasNormals)
mesh->normals.push_back (tempNormals[m]);
// copy texture coordinates
if (hasUVs)
mesh->uvs.push_back (tempTextureCoords[m]);
}
}
}
if (!num)throw new ImportErrorException("NFF2: There are zero faces");
}
@@ -375,12 +756,17 @@ void NFFImporter::InternReadFile( const std::string& pFile,
AI_NFF_PARSE_TRIPLE(s.color);
// read the other properties
AI_NFF_PARSE_FLOAT(s.diffuse);
AI_NFF_PARSE_FLOAT(s.specular);
AI_NFF_PARSE_FLOAT(s.diffuse.r);
AI_NFF_PARSE_FLOAT(s.specular.r);
AI_NFF_PARSE_FLOAT(d); // skip shininess and transmittance
AI_NFF_PARSE_FLOAT(d);
AI_NFF_PARSE_FLOAT(s.refracti);
// NFF2 uses full colors here so we need to use them too
// although NFF uses simple scaling factors
s.diffuse.g = s.diffuse.b = s.diffuse.r;
s.specular.g = s.specular.b = s.specular.r;
// if the next one is NOT a number we assume it is a texture file name
// this feature is used by some NFF files on the internet and it has
// been implemented as it can be really useful
@@ -436,14 +822,12 @@ void NFFImporter::InternReadFile( const std::string& pFile,
currentMesh = &meshes.back();
currentMesh->shader = s;
}
if (!currentMeshWithNormals)
{
meshesWithNormals.push_back(MeshInfo(PatchType_Normals));
currentMeshWithNormals = &meshesWithNormals.back();
currentMeshWithNormals->shader = s;
}
if (!currentMeshWithUVCoords)
{
meshesWithUVCoords.push_back(MeshInfo(PatchType_UVAndNormals));
@@ -676,7 +1060,11 @@ void NFFImporter::InternReadFile( const std::string& pFile,
c->mLookAt = camLookAt - camPos;
c->mPosition = camPos;
c->mUp = camUp;
c->mAspect = resolution.x / resolution.y;
// If the resolution is not specified in the file we
// need to set 1.0 as aspect. The division would become
// INF otherwise.
c->mAspect = (!resolution.y ? 0.f : resolution.x / resolution.y);
++ppcChildren;
}
@@ -715,7 +1103,7 @@ void NFFImporter::InternReadFile( const std::string& pFile,
mesh->mNumVertices = (unsigned int)src.vertices.size();
mesh->mNumFaces = (unsigned int)src.faces.size();
// generate sub nodes for named meshes
// Generate sub nodes for named meshes
if (src.name[0])
{
aiNode* const node = *ppcChildren = new aiNode();
@@ -754,7 +1142,7 @@ void NFFImporter::InternReadFile( const std::string& pFile,
sizeof(aiColor4D)*mesh->mNumVertices);
}
if (src.pType != PatchType_Simple)
if (!src.normals.empty())
{
ai_assert(src.normals.size() == src.vertices.size());
@@ -764,7 +1152,7 @@ void NFFImporter::InternReadFile( const std::string& pFile,
sizeof(aiVector3D)*mesh->mNumVertices);
}
if (src.pType == PatchType_UVAndNormals)
if (!src.uvs.empty())
{
ai_assert(src.uvs.size() == src.vertices.size());
@@ -800,11 +1188,39 @@ void NFFImporter::InternReadFile( const std::string& pFile,
c = src.shader.color * src.shader.specular;
pcMat->AddProperty(&c,1,AI_MATKEY_COLOR_SPECULAR);
// NFF2 - default values for NFF
pcMat->AddProperty(&src.shader.ambient, 1,AI_MATKEY_COLOR_AMBIENT);
pcMat->AddProperty(&src.shader.emissive,1,AI_MATKEY_COLOR_EMISSIVE);
pcMat->AddProperty(&src.shader.opacity, 1,AI_MATKEY_OPACITY);
// setup the first texture layer, if existing
if (src.shader.texFile.length())
{
s.Set(src.shader.texFile);
pcMat->AddProperty(&s,AI_MATKEY_TEXTURE_DIFFUSE(0));
}
// setup the name of the material
if (src.shader.name.length())
{
s.Set(src.shader.texFile);
pcMat->AddProperty(&s,AI_MATKEY_NAME);
}
// setup some more material properties that are specific to NFF2
int i;
if (src.shader.twoSided)
{
i = 1;
pcMat->AddProperty(&i,1,AI_MATKEY_TWOSIDED);
}
i = (src.shader.shaded ? aiShadingMode_Gouraud : aiShadingMode_NoShading);
if (src.shader.shininess)
{
i = aiShadingMode_Phong;
pcMat->AddProperty(&src.shader.shininess,1,AI_MATKEY_SHININESS);
}
pcMat->AddProperty(&i,1,AI_MATKEY_SHADING_MODEL);
}
pScene->mRootNode = root;
}