bool GLTFMesh::writeAllBuffers(std::ofstream& verticesOutputStream, std::ofstream& indicesOutputStream)
{
typedef map<std::string , shared_ptr<GLTF::GLTFBuffer> > IDToBufferDef;
IDToBufferDef IDToBuffer;
shared_ptr <AccessorVector> allAccessors = this->accessors();
shared_ptr <GLTFBufferView> dummyBuffer(new GLTFBufferView());
PrimitiveVector primitives = this->getPrimitives();
unsigned int primitivesCount = (unsigned int)primitives.size();
for (unsigned int i = 0 ; i < primitivesCount ; i++) {
shared_ptr<GLTF::GLTFPrimitive> primitive = primitives[i];
shared_ptr <GLTF::GLTFIndices> uniqueIndices = primitive->getUniqueIndices();
/*
Convert the indices to unsigned short and write the blob
*/
unsigned int indicesCount = (unsigned int)uniqueIndices->getCount();
shared_ptr <GLTFBufferView> indicesBufferView = uniqueIndices->getBufferView();
unsigned char* uniqueIndicesBufferPtr = (unsigned char*)indicesBufferView->getBuffer()->getData();
uniqueIndicesBufferPtr += indicesBufferView->getByteOffset();
unsigned int* uniqueIndicesBuffer = (unsigned int*) uniqueIndicesBufferPtr;
if (indicesCount <= 0) {
// FIXME: report error
} else {
size_t indicesLength = sizeof(unsigned short) * indicesCount;
unsigned short* ushortIndices = (unsigned short*)calloc(indicesLength, 1);
for (unsigned int idx = 0 ; idx < indicesCount ; idx++) {
ushortIndices[idx] = (unsigned short)uniqueIndicesBuffer[idx];
}
uniqueIndices->setByteOffset(static_cast<size_t>(indicesOutputStream.tellp()));
indicesOutputStream.write((const char*)ushortIndices, indicesLength);
//now that we wrote to the stream we can release the buffer.
uniqueIndices->setBufferView(dummyBuffer);
free(ushortIndices);
}
}
for (unsigned int j = 0 ; j < allAccessors->size() ; j++) {
shared_ptr <GLTFAccessor> accessor = (*allAccessors)[j];
shared_ptr <GLTFBufferView> bufferView = accessor->getBufferView();
shared_ptr <GLTFBuffer> buffer = bufferView->getBuffer();
if (!bufferView.get()) {
// FIXME: report error
return false;
}
if (!IDToBuffer[bufferView->getBuffer()->getID().c_str()].get()) {
// FIXME: this should be internal to accessor when a Data buffer is set
// for this, add a type to buffers , and check this type in setBuffer , then call computeMinMax
accessor->computeMinMax();
accessor->setByteOffset(static_cast<size_t>(verticesOutputStream.tellp()));
verticesOutputStream.write((const char*)(static_pointer_cast <GLTFBuffer> (buffer)->getData()), buffer->getByteLength());
//now that we wrote to the stream we can release the buffer.
accessor->setBufferView(dummyBuffer);
IDToBuffer[bufferView->getBuffer()->getID().c_str()] = buffer;
}
}
return true;
}
bool const JSONMesh::writeAllBuffers(std::ofstream& fileOutputStream)
{
typedef map<std::string , shared_ptr<JSONExport::JSONBuffer> > IDToBufferDef;
IDToBufferDef IDToBuffer;
vector <shared_ptr< JSONExport::JSONAccessor> > allAccessors = this->remappedAccessors();
shared_ptr <JSONBuffer> dummyBuffer(new JSONBuffer(0));
std::vector< shared_ptr<JSONExport::JSONPrimitive> > primitives = this->getPrimitives();
unsigned int primitivesCount = (unsigned int)primitives.size();
for (unsigned int i = 0 ; i < primitivesCount ; i++) {
shared_ptr<JSONExport::JSONPrimitive> primitive = primitives[i];
shared_ptr <JSONExport::JSONIndices> uniqueIndices = primitive->getUniqueIndices();
/*
Convert the indices to unsigned short and write the blob
*/
unsigned int indicesCount = (unsigned int)uniqueIndices->getCount();
unsigned int* uniqueIndicesBuffer = (unsigned int*) static_pointer_cast <JSONDataBuffer> (uniqueIndices->getBuffer())->getData();
if (indicesCount <= 0) {
// FIXME: report error
} else {
size_t indicesLength = sizeof(unsigned short) * indicesCount;
unsigned short* ushortIndices = (unsigned short*)malloc(indicesLength);
for (unsigned int idx = 0 ; idx < indicesCount ; idx++) {
ushortIndices[idx] = (unsigned short)uniqueIndicesBuffer[idx];
}
uniqueIndices->setByteOffset(static_cast<size_t>(fileOutputStream.tellp()));
fileOutputStream.write((const char*)ushortIndices, indicesLength);
//now that we wrote to the stream we can release the buffer.
uniqueIndices->setBuffer(dummyBuffer);
free(ushortIndices);
}
}
for (unsigned int j = 0 ; j < allAccessors.size() ; j++) {
shared_ptr <JSONExport::JSONAccessor> accessor = allAccessors[j];
shared_ptr <JSONExport::JSONBuffer> buffer = accessor->getBuffer();
if (!buffer.get()) {
// FIXME: report error
return false;
}
if (!IDToBuffer[buffer->getID().c_str()].get()) {
// FIXME: this should be internal to accessor when a Data buffer is set
// for this, add a type to buffers , and check this type in setBuffer , then call computeMinMax
accessor->computeMinMax();
accessor->setByteOffset(static_cast<size_t>(fileOutputStream.tellp()));
fileOutputStream.write((const char*)(static_pointer_cast <JSONDataBuffer> (buffer)->getData()), buffer->getByteSize());
//now that we wrote to the stream we can release the buffer.
accessor->setBuffer(dummyBuffer);
IDToBuffer[buffer->getID()] = buffer;
}
}
return true;
}
