source: trunk/src/formats/nmd_loader.cc @ 285

// 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"

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::BONE_ARRAY     : load_bones( 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_meshes.push_back( mesh );
        return true;
}

mesh_data* nv::nmd_loader::release_mesh_data( size_t index )
{
        mesh_data* result = m_meshes[ index ];
        m_meshes[ index ] = nullptr;
        return result;
}

void nv::nmd_loader::reset()
{
        for ( auto mesh : m_meshes ) if ( mesh ) delete mesh;
        if ( m_animation ) delete m_animation;
        if ( m_strings )   delete m_strings;
        if ( m_bone_data ) delete m_bone_data;
        m_meshes.clear();
        m_animation = nullptr;
        m_bone_data = 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_bones( stream& source, const nmd_element_header& e )
{
        NV_ASSERT( m_bone_data == nullptr, "MULTIPLE BONE ENTRIES!" );
        m_bone_data = new nmd_bone_data;
        m_bone_data->bones = new nmd_bone[ e.children ];
        m_bone_data->count = (uint16)e.children;
        source.read( m_bone_data->bones, sizeof( nmd_bone ), e.children );
        return true;
}

nmd_animation* nv::nmd_loader::release_animation()
{
        nmd_animation* result = m_animation;
        m_animation = nullptr;
        return result;
}

nmd_bone_data* nv::nmd_loader::release_bone_data()
{
        nmd_bone_data* result = m_bone_data;
        m_bone_data = nullptr;
        return result;
}

string_table* nv::nmd_loader::release_string_table()
{
        string_table* result = m_strings;
        m_strings = nullptr;
        return result;
}


bool nv::nmd_loader::load_animation( stream& source, const nmd_element_header& e )
{
        NV_ASSERT( m_animation == nullptr, "MULTIPLE ANIMATION ENTRIES!" );
        nmd_animation_header header;
        source.read( &header, sizeof( header ), 1 );
        m_animation = new nmd_animation;
        m_animation->fps        = header.fps;
        m_animation->duration   = header.duration;
        m_animation->flat       = header.flat;
        m_animation->node_count = (uint16)e.children;
        m_animation->nodes      = new nmd_node[ 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::ANIMATION_NODE, "ANIMATION_NODE expected!" );
                m_animation->nodes[i].name          = element_header.name;

                uint16 ch_count = element_header.children;

                nmd_animation_node_header node_header;
                source.read( &node_header, sizeof( node_header ), 1 );
                m_animation->nodes[i].parent_id     = node_header.parent_id;
                m_animation->nodes[i].transform     = node_header.transform;
                m_animation->nodes[i].data          = nullptr;
                if ( ch_count > 0 )
                {
                        key_data* kdata = new key_data;
                        m_animation->nodes[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::ANIMATION_CHANNEL, "ANIMATION_CHANNEL expected!" );
                                nv::nmd_animation_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 );
                        }
                }
        }
        return true;
}


// TEMPORARY
nv::nmd_temp_animation::nmd_temp_animation( nmd_loader* loader )
{
        m_animation = loader->release_animation();
        m_strings   = loader->release_string_table();

        for ( uint32 n = 0; n < m_animation->node_count; ++n )
        {
                nmd_node& node = m_animation->nodes[n];
                m_data.push_back( node.data );
                node.data = nullptr;
        }

        if ( !m_animation->flat )
        {
                m_children.resize( m_animation->node_count );
                for ( nv::uint32 n = 0; n < m_animation->node_count; ++n )
                {
                        const nmd_node& node = m_animation->nodes[n];
                        if ( node.parent_id != -1 )
                        {
                                m_children[ node.parent_id ].push_back( n );
                        }
                }
        }

        m_bone_ids.resize( m_animation->node_count );
}

nv::nmd_temp_animation::~nmd_temp_animation()
{
        for ( auto node : m_data ) delete node;
        delete m_animation;
        delete m_strings;
}

void nv::nmd_temp_animation::prepare( const nmd_temp_model* model )
{
        m_offsets = model->m_bone_offsets.data();
        for ( uint32 n = 0; n < m_animation->node_count; ++n )
        {
                const nmd_node& node = m_animation->nodes[n];
                sint16 bone_id = -1;

                auto bi = model->m_bone_names.find( m_strings->get( node.name ) );
                if ( bi != model->m_bone_names.end() )
                {
                        bone_id = bi->second;
                }
                m_bone_ids[n] = bone_id;
        }
}

void nv::nmd_temp_animation::animate( mat4* data, uint32 time )
{
        float tick_time = ( time / 1000.0f ) * m_animation->fps;
        float anim_time = fmodf( tick_time, m_animation->duration );

        if ( !m_animation->flat )
        {
                animate_rec( data, anim_time, 0, mat4() );
                return;
        }

        for ( uint32 n = 0; n < m_animation->node_count; ++n )
                if ( m_bone_ids[n] >= 0 )
                {
                        const nmd_node* node = &m_animation->nodes[ n ];
                        nv::mat4 node_mat( node->transform );

                        if ( m_data[n] )
                        {
                                node_mat = m_data[n]->get_matrix( anim_time );
                        }

                        sint16 bone_id = m_bone_ids[n];
                        data[ bone_id ] = node_mat * m_offsets[ bone_id ];
                }

}

void nv::nmd_temp_animation::animate_rec( mat4* data, float time, uint32 node_id, const mat4& parent_mat )
{
        // TODO: fix transforms, which are now embedded,
        //       see note in assimp_loader.cc:load_node
        const nmd_node* node = &m_animation->nodes[ node_id ];
        mat4 node_mat( node->transform );

        if ( m_data[ node_id ] )
        {
                node_mat = m_data[ node_id ]->get_matrix( time );
        }

        mat4 global_mat = parent_mat * node_mat;

        sint16 bone_id = m_bone_ids[ node_id ];
        if ( bone_id >= 0 )
        {
                data[ bone_id ] = global_mat * m_offsets[ bone_id ];
        }

        for ( auto child : m_children[ node_id ] )
        {
                animate_rec( data, time, child, global_mat );
        }
}

nv::nmd_temp_model::nmd_temp_model( nmd_loader* loader )
{
        for ( unsigned m = 0; m < loader->get_mesh_count(); ++m )
        {
                m_mesh_data.push_back(loader->release_mesh_data(m));
        }
        nmd_bone_data* bone_data = loader->release_bone_data();
        string_table*  strings   = loader->release_string_table();

        for ( nv::uint16 bi = 0; bi < bone_data->count; ++bi )
        {
                m_bone_names[ strings->get( bone_data->bones[bi].name ) ] = bi;
                m_bone_offsets.push_back( bone_data->bones[bi].offset );
        }

        delete bone_data;
        delete strings;
}

nv::nmd_temp_model::~nmd_temp_model()
{
        for ( unsigned m = 0; m < m_mesh_data.size(); ++m )
        {
                delete m_mesh_data[m];
        }
}