int Attribute::appendElement( void *mem )
{
int pos = m_data.size();
m_data.resize( pos + numComponents()*elementComponentSize() );
msys_memcpy( &m_data.m_data[pos], mem, numComponents()*elementComponentSize() );
return m_numElements++;
}
Attribute *Attribute::copy()
{
Attribute *nattr = new Attribute( numComponents(), elementComponentSize() );
nattr->m_data.resize( numElements() * numComponents()*elementComponentSize() );
msys_memcpy( nattr->m_data.m_data, m_data.m_data, numElements() * numComponents()*elementComponentSize() );
nattr->m_numElements = numElements();
return nattr;
}
void Attribute::bindAsAttribute( int index )
{
// activate and specify pointer to vertex array
// should be done only when attribute has been updated
oglBindBuffer(GL_ARRAY_BUFFER, m_bufferId);
oglBufferData(GL_ARRAY_BUFFER, numComponents()*elementComponentSize()*numElements(), getRawPointer(), GL_STATIC_DRAW);
oglBindBuffer(GL_ARRAY_BUFFER, m_bufferId);
oglEnableVertexAttribArray(index);
oglVertexAttribPointer(index, numComponents(), elementComponentType(), false, 0, 0);
}
void Attribute::bindAsAttribute( int index )
{
if(m_isDirty && m_numElements)
{
// activate and specify pointer to vertex array
// should be done only when attribute has been updated
glBindBuffer(GL_ARRAY_BUFFER, m_bufferId);
glBufferData(GL_ARRAY_BUFFER, numComponents()*elementComponentSize()*numElements(), getRawPointer(), GL_STATIC_DRAW);
m_isDirty = false;
}
glBindBuffer(GL_ARRAY_BUFFER, m_bufferId);
glEnableVertexAttribArray(index);
if( m_internalComponentType == GL_FLOAT )
glVertexAttribPointer(index, numComponents(), m_internalComponentType, false, 0, 0);
else
glVertexAttribIPointer(index, numComponents(), m_internalComponentType, 0, 0);
}
void Attribute::getElement( int vertexIndex, void *mem )
{
if(vertexIndex<numElements())
msys_memcpy( mem, &m_data.m_data[vertexIndex * numComponents()*elementComponentSize()], numComponents()*elementComponentSize() );
}
void Attribute::removeElement( int vertexIndex )
{
m_data.erase( vertexIndex*numComponents()*elementComponentSize(), numComponents()*elementComponentSize() );
--m_numElements;
}
int Attribute::appendElements( int num )
{
m_data.resize( m_data.size() + num*numComponents()*elementComponentSize() );
m_numElements += num;
return m_numElements;
}