const ccGenericPrimitive& ccGenericPrimitive::operator += (const ccGenericPrimitive& prim)
{
ccPointCloud* verts = vertices();
unsigned vertCount = verts->size();
unsigned facesCount = size();
unsigned triFacesNormCount = (m_triNormals ? m_triNormals->currentSize() : 0);
//count new number of vertices & faces
unsigned newVertCount = vertCount + prim.getAssociatedCloud()->size();
unsigned newFacesCount = facesCount + prim.size();
bool primHasVertNorms = prim.getAssociatedCloud()->hasNormals();
bool primHasFaceNorms = prim.hasTriNormals();
//reserve memory
if ( verts->reserve(newVertCount)
&& (!primHasVertNorms || verts->reserveTheNormsTable())
&& reserve(newFacesCount)
&& (!primHasFaceNorms || m_triNormalIndexes || reservePerTriangleNormalIndexes()))
{
//copy vertices & normals
ccGenericPointCloud* cloud = prim.getAssociatedCloud();
for (unsigned i = 0; i < cloud->size(); ++i)
{
verts->addPoint(*cloud->getPoint(i));
if (primHasVertNorms)
{
verts->addNormIndex(cloud->getPointNormalIndex(i));
}
}
//copy face normals
if (primHasFaceNorms)
{
const NormsIndexesTableType* primNorms = prim.getTriNormsTable();
assert(primNorms);
unsigned primTriNormCount = primNorms->currentSize();
NormsIndexesTableType* normsTable = (m_triNormals ? m_triNormals : new NormsIndexesTableType());
if (!normsTable || !normsTable->reserveSafe(triFacesNormCount + primTriNormCount))
{
ccLog::Error("[ccGenericPrimitive::operator +] Not enough memory!");
return *this;
}
//attach table if not done already
if (!m_triNormals)
{
setTriNormsTable(normsTable);
assert(m_triNormals);
}
for (unsigned i = 0; i < primTriNormCount; ++i)
{
normsTable->addElement(primNorms->getValue(i));
}
}
//copy faces
for (unsigned i = 0; i < prim.size(); ++i)
{
const CCLib::VerticesIndexes* tsi = prim.getTriangleVertIndexes(i);
addTriangle(vertCount + tsi->i1, vertCount + tsi->i2, vertCount + tsi->i3);
if (primHasFaceNorms)
{
const Tuple3i& normIndexes = prim.m_triNormalIndexes->at(i);
addTriangleNormalIndexes(triFacesNormCount + normIndexes.u[0], triFacesNormCount + normIndexes.u[1], triFacesNormCount + normIndexes.u[2]);
}
}
}
else
{
ccLog::Error("[ccGenericPrimitive::operator +] Not enough memory!");
}
return *this;
}
bool ccGenericPrimitive::init(unsigned vertCount, bool vertNormals, unsigned faceCounts, unsigned faceNormCounts)
{
ccPointCloud* verts = vertices();
assert(verts);
if (!verts)
return false;
/*** clear existing structures ***/
//clear vertices & normals
bool keepOtherProps = (vertCount == verts->size());
if (keepOtherProps)
{
verts->unallocatePoints();
verts->unallocateNorms();
}
else
{
verts->clear();
}
//clear triangles indexes
assert(m_triVertIndexes);
m_triVertIndexes->clear();
//clear per triangle normals
removePerTriangleNormalIndexes();
if (m_triNormals)
m_triNormals->clear();
//DGM: if we do this we'll have issues with the DB tree depending on where when we call this method!
//{
// removeChild(m_triNormals);
// setTriNormsTable(0);
// assert(!m_triNormals);
//}
/*** init necessary structures ***/
if (vertCount && !verts->reserve(vertCount))
return false;
if (vertNormals && !verts->reserveTheNormsTable())
{
verts->clear();
return false;
}
if (faceCounts && !reserve(faceCounts))
{
verts->clear();
return false;
}
if (faceNormCounts)
{
NormsIndexesTableType* normsTable = (m_triNormals ? m_triNormals : new NormsIndexesTableType());
if (!normsTable || !normsTable->reserveSafe(faceNormCounts) || !reservePerTriangleNormalIndexes())
{
verts->clear();
m_triVertIndexes->clear();
delete normsTable;
return false;
}
//attach table if not done already
if (!m_triNormals)
{
setTriNormsTable(normsTable);
assert(m_triNormals);
}
}
return true;
}