source: trunk/src/formats/nmd_loader.cc @ 291

// Copyright (C) 2014 ChaosForge / Kornel Kisielewicz
// http://chaosforge.org/
//
// This file is part of NV Libraries.
// For conditions of distribution and use, see copyright notice in nv.hh

#include "nv/formats/nmd_loader.hh"
#include "nv/io/std_stream.hh"
#include "nv/string.hh"

using namespace nv;

bool nv::nmd_loader::load( stream& source )
{
        // TODO: proper error handling
        reset();
        nmd_header root_header;
        source.read( &root_header, sizeof( root_header ), 1 );
        for ( uint32 i = 0; i < root_header.elements; ++i )
        {
                nmd_element_header element_header;
                source.read( &element_header, sizeof( element_header ), 1 );
                switch ( element_header.type )
                {
                case nmd_type::MESH           : load_mesh( source, element_header ); break;
                case nmd_type::ANIMATION      : load_animation( source, element_header ); break;
                case nmd_type::STRING_TABLE   : load_strings( source ); break;
                default: NV_ASSERT( false, "UNKNOWN NMD ELEMENT!" ); break;
                }
        }
        return true;
}

bool nv::nmd_loader::load_mesh( stream& source, const nmd_element_header& e )
{
        mesh_data* mesh = new mesh_data();
        for ( uint32 s = 0; s < e.children; ++s )
        {
                nmd_element_header element_header;
                source.read( &element_header, sizeof( element_header ), 1 );
                NV_ASSERT( element_header.type == nmd_type::STREAM, "STREAM expected!" );

                nmd_stream_header stream_header;
                source.read( &stream_header, sizeof( stream_header ), 1 );
                mesh_raw_channel* channel = mesh_raw_channel::create( stream_header.format, stream_header.count );
                source.read( channel->data, stream_header.format.size, stream_header.count );
                mesh->add_channel( channel );
        }
        m_mesh_names.push_back( e.name );
        m_meshes.push_back( mesh );
        return true;
}

mesh_data* nv::nmd_loader::release_mesh_data( size_t index )
{
        mesh_data* result = m_meshes[ index ];
        if ( m_strings ) result->set_name( m_strings->get( m_mesh_names[ index ] ) );
        m_meshes[ index ] = nullptr;
        return result;
}

mesh_data_pack* nv::nmd_loader::release_mesh_data_pack()
{
        uint32 size = m_meshes.size();
        mesh_data* meshes = new mesh_data[ size ];
        for ( uint32 i = 0; i < size; ++i )
        {
                m_meshes[i]->move_to( meshes[i] );
                delete m_meshes[i];
        }
        m_meshes.clear();
        return new mesh_data_pack( size, meshes, release_mesh_nodes_data() );
}

void nv::nmd_loader::reset()
{
        for ( auto mesh : m_meshes ) if ( mesh ) delete mesh;
        if ( m_strings )   delete m_strings;
        if ( m_node_data ) delete m_node_data;
        m_meshes.clear();
        m_mesh_names.clear();
        m_node_names.clear();

        m_node_data  = nullptr;
        m_node_array = nullptr;
        m_strings    = nullptr;
}

nv::nmd_loader::~nmd_loader()
{
        reset();
}

bool nv::nmd_loader::load_strings( stream& source )
{
        NV_ASSERT( m_strings == nullptr, "MULTIPLE STRING ENTRIES!" );
        m_strings = new string_table( &source );
        return true;
}

bool nv::nmd_loader::load_animation( stream& source, const nmd_element_header& e )
{
        NV_ASSERT( m_node_data == nullptr, "MULTIPLE NODE ENTRIES!" );
        nmd_animation_header animation_header;
        source.read( &animation_header, sizeof( animation_header ), 1 );
        m_node_array = new mesh_node_data[ e.children ];
        for ( uint32 i = 0; i < e.children; ++i )
        {
                nmd_element_header element_header;
                source.read( &element_header, sizeof( element_header ), 1 );
                NV_ASSERT( element_header.type == nmd_type::NODE, "NODE expected!" );
                m_node_names.push_back( element_header.name );
                uint16 ch_count = element_header.children;

                nmd_node_header node_header;
                source.read( &node_header, sizeof( node_header ), 1 );
                m_node_array[i].parent_id     = node_header.parent_id;
                m_node_array[i].transform     = node_header.transform;
                m_node_array[i].data          = nullptr;
                if ( ch_count > 0 )
                {
                        key_data* kdata = new key_data;
                        m_node_array[i].data = kdata;
                        for ( uint32 c = 0; c < ch_count; ++c )
                        {
                                source.read( &element_header, sizeof( element_header ), 1 );
                                NV_ASSERT( element_header.type == nmd_type::KEY_CHANNEL, "CHANNEL expected!" );
                                nv::nmd_key_channel_header cheader;
                                source.read( &cheader, sizeof( cheader ), 1 );
                                key_raw_channel* channel = key_raw_channel::create( cheader.format, cheader.count );
                                source.read( channel->data, channel->desc.size, channel->count );
                                kdata->add_channel( channel );
                        }
                }
        }
        m_node_data = new mesh_nodes_data( "animation", e.children, m_node_array, animation_header.frame_rate, animation_header.duration, animation_header.flat );
        return true;
}

mesh_nodes_data* nv::nmd_loader::release_mesh_nodes_data( size_t )
{
        if ( m_node_data )
        {
                if ( m_strings )
                {
                        for ( uint32 i = 0; i < m_node_data->get_count(); ++i )
                        {
                                m_node_array[i].name = m_strings->get( m_node_names[i] );
                        }
                }
                mesh_nodes_data* result = m_node_data;
                m_node_data = nullptr;
                m_node_array = nullptr;
                return result;
        }
        return nullptr;
}