void CompareOnTheFlyMesh(comparer_context& comp) {
scoped_chunk chunk(comp,"aiMesh");
comp.cmp<uint32_t>("mPrimitiveTypes");
comp.cmp<uint32_t>("mNumVertices");
const uint32_t nf = comp.cmp<uint32_t>("mNumFaces");
comp.cmp<uint32_t>("mNumBones");
comp.cmp<uint32_t>("mMaterialIndex");
const uint32_t present = comp.cmp<uint32_t>("<vertex-components-present>");
if(present & ASSBIN_MESH_HAS_POSITIONS) {
comp.cmp_bounds<aiVector3D>("mVertices");
}
if(present & ASSBIN_MESH_HAS_NORMALS) {
comp.cmp_bounds<aiVector3D>("mNormals");
}
if(present & ASSBIN_MESH_HAS_TANGENTS_AND_BITANGENTS) {
comp.cmp_bounds<aiVector3D>("mTangents");
comp.cmp_bounds<aiVector3D>("mBitangents");
}
for(unsigned int i = 0; present & ASSBIN_MESH_HAS_COLOR(i); ++i) {
std::stringstream ss;
comp.cmp_bounds<aiColor4D>((ss<<"mColors["<<i<<"]",ss.str()));
}
for(unsigned int i = 0; present & ASSBIN_MESH_HAS_TEXCOORD(i); ++i) {
std::stringstream ss;
comp.cmp<uint32_t>((ss<<"mNumUVComponents["<<i<<"]",ss.str()));
comp.cmp_bounds<aiVector3D>((ss.clear(),ss<<"mTextureCoords["<<i<<"]",ss.str()));
}
for(unsigned int i = 0; i< ((nf+511)/512); ++i) {
std::stringstream ss;
comp.cmp<uint32_t>((ss<<"mFaces["<<i*512<<"-"<<std::min(static_cast<
uint32_t>((i+1)*512),nf)<<"]",ss.str()));
}
sliced_chunk_reader reader(comp);
for(sliced_chunk_iterator it = reader.begin(); !it.is_end(); ++it) {
if ((*it).first == ASSBIN_CHUNK_AIBONE) {
CompareOnTheFlyBone(comp);
}
}
}
// -----------------------------------------------------------------------------------
uint32_t WriteBinaryMesh(const aiMesh* mesh)
{
uint32_t len = 0, old = WriteMagic(ASSBIN_CHUNK_AIMESH);
len += Write<unsigned int>(mesh->mPrimitiveTypes);
len += Write<unsigned int>(mesh->mNumVertices);
len += Write<unsigned int>(mesh->mNumFaces);
len += Write<unsigned int>(mesh->mNumBones);
len += Write<unsigned int>(mesh->mMaterialIndex);
// first of all, write bits for all existent vertex components
unsigned int c = 0;
if (mesh->mVertices) {
c |= ASSBIN_MESH_HAS_POSITIONS;
}
if (mesh->mNormals) {
c |= ASSBIN_MESH_HAS_NORMALS;
}
if (mesh->mTangents && mesh->mBitangents) {
c |= ASSBIN_MESH_HAS_TANGENTS_AND_BITANGENTS;
}
for (unsigned int n = 0; n < AI_MAX_NUMBER_OF_TEXTURECOORDS;++n) {
if (!mesh->mTextureCoords[n]) {
break;
}
c |= ASSBIN_MESH_HAS_TEXCOORD(n);
}
for (unsigned int n = 0; n < AI_MAX_NUMBER_OF_COLOR_SETS;++n) {
if (!mesh->mColors[n]) {
break;
}
c |= ASSBIN_MESH_HAS_COLOR(n);
}
len += Write<unsigned int>(c);
aiVector3D minVec, maxVec;
if (mesh->mVertices) {
if (shortened) {
len += WriteBounds(mesh->mVertices,mesh->mNumVertices);
} // else write as usual
else len += fwrite(mesh->mVertices,1,12*mesh->mNumVertices,out);
}
if (mesh->mNormals) {
if (shortened) {
len += WriteBounds(mesh->mNormals,mesh->mNumVertices);
} // else write as usual
else len += fwrite(mesh->mNormals,1,12*mesh->mNumVertices,out);
}
if (mesh->mTangents && mesh->mBitangents) {
if (shortened) {
len += WriteBounds(mesh->mTangents,mesh->mNumVertices);
len += WriteBounds(mesh->mBitangents,mesh->mNumVertices);
} // else write as usual
else {
len += fwrite(mesh->mTangents,1,12*mesh->mNumVertices,out);
len += fwrite(mesh->mBitangents,1,12*mesh->mNumVertices,out);
}
}
for (unsigned int n = 0; n < AI_MAX_NUMBER_OF_COLOR_SETS;++n) {
if (!mesh->mColors[n])
break;
if (shortened) {
len += WriteBounds(mesh->mColors[n],mesh->mNumVertices);
} // else write as usual
else len += fwrite(mesh->mColors[n],16*mesh->mNumVertices,1,out);
}
for (unsigned int n = 0; n < AI_MAX_NUMBER_OF_TEXTURECOORDS;++n) {
if (!mesh->mTextureCoords[n])
break;
// write number of UV components
len += Write<unsigned int>(mesh->mNumUVComponents[n]);
if (shortened) {
len += WriteBounds(mesh->mTextureCoords[n],mesh->mNumVertices);
} // else write as usual
else len += fwrite(mesh->mTextureCoords[n],12*mesh->mNumVertices,1,out);
}
// write faces. There are no floating-point calculations involved
// in these, so we can write a simple hash over the face data
// to the dump file. We generate a single 32 Bit hash for 512 faces
// using Assimp's standard hashing function.
if (shortened) {
unsigned int processed = 0;
for (unsigned int job;(job = std::min(mesh->mNumFaces-processed,512u));processed += job) {
uint32_t hash = 0;
for (unsigned int a = 0; a < job;++a) {
const aiFace& f = mesh->mFaces[processed+a];
uint32_t tmp = f.mNumIndices;
hash = SuperFastHash(reinterpret_cast<const char*>(&tmp),sizeof tmp,hash);
for (unsigned int i = 0; i < f.mNumIndices; ++i) {
BOOST_STATIC_ASSERT(AI_MAX_VERTICES <= 0xffffffff);
tmp = static_cast<uint32_t>( f.mIndices[i] );
hash = SuperFastHash(reinterpret_cast<const char*>(&tmp),sizeof tmp,hash);
}
}
len += Write<unsigned int>(hash);
}
}
else // else write as usual
{
// if there are less than 2^16 vertices, we can simply use 16 bit integers ...
for (unsigned int i = 0; i < mesh->mNumFaces;++i) {
const aiFace& f = mesh->mFaces[i];
BOOST_STATIC_ASSERT(AI_MAX_FACE_INDICES <= 0xffff);
len += Write<uint16_t>(f.mNumIndices);
for (unsigned int a = 0; a < f.mNumIndices;++a) {
if (mesh->mNumVertices < (1u<<16)) {
len += Write<uint16_t>(f.mIndices[a]);
}
else len += Write<unsigned int>(f.mIndices[a]);
}
}
}
// write bones
if (mesh->mNumBones) {
for (unsigned int a = 0; a < mesh->mNumBones;++a) {
const aiBone* b = mesh->mBones[a];
len += WriteBinaryBone(b)+8;
}
}
ChangeInteger(old,len);
return len;
}
