//----------------------------
// Function name: read
//----------------------------
//
//Parameters:
//p: Scene &image, const char *fileName
//GlobalVars:
//g:
//Returns:
//r:bool
// Caution
//c:
//Assumations:
//a:
//Describtions:
//d: read the image from the given file
//SeeAlso:
//s:
//
//------------------------------
NodeTransitPtr OBJSceneFileType::read( std::istream &is,
const Char8 *,
Resolver ) const
{
NodeUnrecPtr rootPtr, nodePtr;
std::string elem;
std::map<std::string, DataElem>::const_iterator elemI;
Vec3f vec3r;
Pnt3f pnt3r;
Vec2f vec2r;
Real32 x,y,z;
GeoPnt3fPropertyUnrecPtr coordPtr = GeoPnt3fProperty::create();
GeoVec2fPropertyUnrecPtr texCoordPtr = GeoVec2fProperty::create();
GeoVec3fPropertyUnrecPtr normalPtr = GeoVec3fProperty::create();
GeometryUnrecPtr geoPtr;
GeoIntegralPropertyUnrecPtr posIndexPtr, texIndexPtr, normalIndexPtr;
GeoIntegralPropertyUnrecPtr lensPtr;
GeoIntegralPropertyUnrecPtr typePtr;
DataElem dataElem;
DataElem lastDataElem;
Char8 strBuf[8192], *token, *nextToken;
Int32 strBufSize = sizeof(strBuf)/sizeof(Char8);
Int32 index, posIndex = 0, indexType;
Int32 i,j,n,primCount[3];
std::list<Mesh> meshList;
std::map<std::string, SimpleTexturedMaterialUnrecPtr> mtlMap;
std::map<std::string, SimpleTexturedMaterialUnrecPtr>::iterator mtlI;
Mesh emptyMesh;
Face emptyFace;
TiePoint emptyTie;
Int32 indexMask, meshIndexMask;
std::list<Face>::iterator faceI;
std::list<Mesh>::iterator meshI;
bool isSingleIndex;
// create the first mesh entry
meshList.push_back(emptyMesh);
meshI = meshList.begin();
if(is)
{
primCount[0] = 0;
primCount[1] = 0;
primCount[2] = 0;
for(is >> elem; is.eof() == false; is >> elem)
{
if(elem[0] == '#' || elem[0] == '$')
{
is.ignore(INT_MAX, '\n');
}
else
{
SceneFileHandler::the()->updateReadProgress();
elemI = _dataElemMap.find(elem);
dataElem = ((elemI == _dataElemMap.end()) ?
UNKNOWN_DE : elemI->second );
switch (dataElem)
{
case OBJECT_DE:
case GROUP_DE:
case SMOOTHING_GROUP_DE:
is.ignore(INT_MAX, '\n');
break;
case VERTEX_DE:
primCount[0]++;
is >> x >> y >> z;
pnt3r.setValues(x,y,z);
coordPtr->addValue(pnt3r);
break;
case VERTEX_TEXTURECOORD_DE:
primCount[1]++;
is >> x >> y;
vec2r.setValues(x,y);
texCoordPtr->addValue(vec2r);
break;
case VERTEX_NORMAL_DE:
primCount[2]++;
is >> x >> y >> z;
vec3r.setValues(x,y,z);
normalPtr->addValue(vec3r);
break;
case LIB_MTL_DE:
is >> elem;
readMTL ( elem.c_str(), mtlMap );
is.ignore(INT_MAX, '\n');
break;
case USE_MTL_DE:
is >> elem;
if (meshI->faceList.empty() == false)
{
meshList.push_front(emptyMesh);
meshI = meshList.begin();
}
mtlI = mtlMap.find(elem);
if (mtlI == mtlMap.end())
{
FFATAL (("Unkown mtl %s\n", elem.c_str()));
}
else
{
meshI->mtlPtr = mtlI->second;
}
break;
case FACE_DE:
meshI->faceList.push_front(emptyFace);
faceI = meshI->faceList.begin();
is.get(strBuf,strBufSize);
token = strBuf;
indexType = 0;
while(token && *token)
{
// some tools use line continuation for long
// face definitions - these use a \ at the line
// end
if(*token == '\\')
{
is.ignore(1, '\n');
is.get(strBuf,strBufSize);
token = strBuf;
indexType = 0;
continue;
}
for (; *token == '/'; token++)
indexType++;
for (; isspace(*token); token++)
indexType = 0;
index = strtol(token, &nextToken, 10);
if (token == nextToken)
break;
if (indexType == 0)
faceI->tieVec.push_back(emptyTie);
if (index >= 0)
index--;
else
index = primCount[indexType] + index;
faceI->tieVec.back().index[indexType] = index;
token = nextToken;
}
break;
case UNKNOWN_DE:
default:
// don't warn about 3rd tex coord
if(lastDataElem != VERTEX_TEXTURECOORD_DE)
{
FWARNING (( "Unkown obj data elem: %s\n",
elem.c_str()));
}
is.ignore(INT_MAX, '\n');
break;
}
lastDataElem = dataElem;
}
}
#if 0
std::cerr << "------------------------------------------------" << std::endl;
i = 0;
for (meshI = meshList.begin(); meshI != meshList.end(); meshI++)
{
std::cerr << "Mesh " << i << " faceCount :"
<< meshI->faceList.size() << std::endl;
j = 0 ;
for ( faceI = meshI->faceList.begin(); faceI != meshI->faceList.end();
faceI++)
std::cerr << "MESH " << i << "face: " << j++ << "tie num: "
<< faceI->tieVec.size() << std::endl;
i++;
}
std::cerr << "------------------------------------------------" << std::endl;
#endif
// create Geometry objects
for (meshI = meshList.begin(); meshI != meshList.end(); meshI++)
{
geoPtr = Geometry::create();
posIndexPtr = NULL;
texIndexPtr = NULL;
normalIndexPtr = NULL;
lensPtr = GeoUInt32Property::create();
typePtr = GeoUInt8Property ::create();
// create and check mesh index mask
meshIndexMask = 0;
isSingleIndex = true;
if ( meshI->faceList.empty() == false)
{
for ( faceI = meshI->faceList.begin();
faceI != meshI->faceList.end(); faceI++)
{
indexMask = 0;
n = UInt32(faceI->tieVec.size());
for (i = 0; i < n; i++)
{
for (j = 0; j < 3; j++)
{
if ((index = (faceI->tieVec[i].index[j])) >= 0)
{
indexMask |= (1 << j);
if (j)
isSingleIndex &= (posIndex == index);
else
posIndex = index;
}
}
}
if (meshIndexMask == 0)
{
meshIndexMask = indexMask;
}
else if (meshIndexMask != indexMask)
{
// consider this real-world example:
// [...]
// f 1603//1747 1679//1744 1678//1743
// s 1
// f 9/1/10 5/2/9 1680/3/1748 1681/4/174
// [...]
// Some faces contain texture coords and others do not.
// The old version did just skip this geometry.
// This version should continue if there's at least
// the vertex index
// I've seen the change in the maskIndex only after a smooth group,
// so it's perhaps smarter to not ignore the smooth group further up in this code
if( !(indexMask & 1) )
{
// if there are vertex indices there's no reason to get in here
FFATAL (( "IndexMask unmatch, can not create geo\n"));
meshIndexMask = 0;
break;
}
else
{
// consider the minimum similarities of mesh masks
meshIndexMask &= indexMask;
}
}
}
}
else
{
FWARNING (("Mesh with empty faceList\n"));
}
// fill the geo properties
if (meshIndexMask)
{
geoPtr->setPositions ( coordPtr );
posIndexPtr = GeoUInt32Property::create();
if(!isSingleIndex)
geoPtr->setIndex(posIndexPtr, Geometry::PositionsIndex);
geoPtr->setLengths ( lensPtr );
geoPtr->setTypes ( typePtr );
if ( (meshIndexMask & 2) && texCoordPtr->size() > 0 )
{
geoPtr->setTexCoords ( texCoordPtr );
texIndexPtr = GeoUInt32Property::create();
if(!isSingleIndex)
geoPtr->setIndex(texIndexPtr, Geometry::TexCoordsIndex);
}
else
{
geoPtr->setTexCoords ( NULL );
}
if ( (meshIndexMask & 4) && normalPtr->size() > 0 )
{
geoPtr->setNormals ( normalPtr );
normalIndexPtr = GeoUInt32Property::create();
if(!isSingleIndex)
geoPtr->setIndex(normalIndexPtr, Geometry::NormalsIndex);
}
else
{
geoPtr->setNormals ( NULL );
}
if (meshI->mtlPtr == NULL)
{
meshI->mtlPtr = SimpleTexturedMaterial::create();
meshI->mtlPtr->setDiffuse( Color3f( .8f, .8f, .8f ) );
meshI->mtlPtr->setSpecular( Color3f( 1.f, 1.f, 1.f ) );
meshI->mtlPtr->setShininess( 20.f );
}
geoPtr->setMaterial ( meshI->mtlPtr );
for ( faceI = meshI->faceList.begin();
faceI != meshI->faceList.end(); faceI++)
{
n = UInt32(faceI->tieVec.size());
// add the lens entry
lensPtr->push_back(n);
// add the type entry
typePtr->push_back(GL_POLYGON);
// create the index values
for (i = 0; i < n; i++)
{
if (isSingleIndex)
{
posIndexPtr->push_back(faceI->tieVec[i].index[0]);
}
else
{
posIndexPtr->push_back(faceI->tieVec[i].index[0]);
if(texIndexPtr != NULL)
texIndexPtr->push_back(faceI->tieVec[i].index[1]);
if(normalIndexPtr != NULL)
normalIndexPtr->push_back(faceI->tieVec[i].index[2]);
}
}
}
if(isSingleIndex)
{
geoPtr->setIndex(posIndexPtr, Geometry::PositionsIndex);
geoPtr->setIndex(posIndexPtr, Geometry::NormalsIndex );
geoPtr->setIndex(posIndexPtr, Geometry::TexCoordsIndex);
}
// need to port the geometry functions ...
createSharedIndex( geoPtr );
// check if we have normals
// need to port the geometry functions ...
if(geoPtr->getNormals() == NULL)
calcVertexNormals(geoPtr);
// create and link the node
nodePtr = Node::create();
nodePtr->setCore( geoPtr );
if (meshList.size() > 1)
{
if (rootPtr == NULL)
{
rootPtr = Node::create();
GroupUnrecPtr tmpPtr = Group::create();
rootPtr->setCore ( tmpPtr );
rootPtr->addChild(nodePtr);
}
else
{
rootPtr->addChild(nodePtr);
}
}
else
{
rootPtr = nodePtr;
}
}
}
}
SceneFileHandler::the()->updateReadProgress(100);
commitChanges();
return NodeTransitPtr(rootPtr);
}
