plugins/md3model/mdl.cpp

   1 /*
   2    Copyright (C) 2001-2006, William Joseph.
   3    All Rights Reserved.
   4
   5    This file is part of GtkRadiant.
   6
   7    GtkRadiant is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    GtkRadiant is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GtkRadiant; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  */
  21
  22 #include "mdl.h"
  23
  24 #include "ifilesystem.h"
  25 #include "imodel.h"
  26
  27 #include "imagelib.h"
  28 #include "bytestreamutils.h"
  29
  30 #include "model.h"
  31 #include "ident.h"
  32 #include "mdlnormals.h"
  33 #include "mdlformat.h"
  34
  35 void istream_read_mdlHeader( PointerInputStream& inputStream, mdlHeader_t& header ){
  36         inputStream.read( header.ident, 4 );
  37         header.version = istream_read_int32_le( inputStream );
  38         header.scale[0] = istream_read_float32_le( inputStream );
  39         header.scale[1] = istream_read_float32_le( inputStream );
  40         header.scale[2] = istream_read_float32_le( inputStream );
  41         header.scale_origin[0] = istream_read_float32_le( inputStream );
  42         header.scale_origin[1] = istream_read_float32_le( inputStream );
  43         header.scale_origin[2] = istream_read_float32_le( inputStream );
  44         header.boundingradius = istream_read_float32_le( inputStream );
  45         header.eyeposition[0] = istream_read_float32_le( inputStream );
  46         header.eyeposition[1] = istream_read_float32_le( inputStream );
  47         header.eyeposition[2] = istream_read_float32_le( inputStream );
  48         header.numskins = istream_read_int32_le( inputStream );
  49         header.skinwidth = istream_read_int32_le( inputStream );
  50         header.skinheight = istream_read_int32_le( inputStream );
  51         header.numverts = istream_read_int32_le( inputStream );
  52         header.numtris = istream_read_int32_le( inputStream );
  53         header.numframes = istream_read_int32_le( inputStream );
  54         header.synctype = istream_read_int32_le( inputStream );
  55         header.flags = istream_read_int32_le( inputStream );
  56         header.size = istream_read_float32_le( inputStream );
  57 }
  58
  59 inline ArbitraryMeshVertex MDLVertex_construct( const mdlHeader_t& header, const mdlXyzNormal_t& xyz, const mdlSt_t& st, bool facesfront ){
  60         return ArbitraryMeshVertex(
  61                            Vertex3f(
  62                                    xyz.v[0] * header.scale[0] + header.scale_origin[0],
  63                                    xyz.v[1] * header.scale[1] + header.scale_origin[1],
  64                                    xyz.v[2] * header.scale[2] + header.scale_origin[2]
  65                                    ),
  66                            Normal3f(
  67                                    g_mdl_normals[xyz.lightnormalindex][0],
  68                                    g_mdl_normals[xyz.lightnormalindex][1],
  69                                    g_mdl_normals[xyz.lightnormalindex][2]
  70                                    ),
  71                            TexCoord2f(
  72                                    ( (float)st.s / header.skinwidth ) + ( ( st.onseam == MDL_ONSEAM && !facesfront ) ? 0.5f : 0.0f ),
  73                                    (float)st.t / header.skinheight
  74                                    )
  75                            );
  76 }
  77
  78 class mdlVertex_t
  79 {
  80 public:
  81 inline mdlVertex_t( int vertindex, int facesfront )
  82         : m_vertindex( vertindex ), m_facesfront( facesfront )
  83 {}
  84 inline bool operator<( const mdlVertex_t& other ) const {
  85         if ( m_facesfront < other.m_facesfront ) {
  86                 return true;
  87         }
  88         if ( other.m_facesfront < m_facesfront ) {
  89                 return false;
  90         }
  91
  92         if ( m_vertindex < other.m_vertindex ) {
  93                 return true;
  94         }
  95         if ( other.m_vertindex < m_vertindex ) {
  96                 return false;
  97         }
  98
  99         return false;
 100 }
 101 inline bool operator==( const mdlVertex_t& other ) const {
 102         return m_vertindex == other.m_vertindex
 103                    && m_facesfront == other.m_facesfront;
 104 }
 105
 106 int m_vertindex;
 107 int m_facesfront;
 108 };
 109
 110 typedef const mdlTriangle_t* mdlTriangleIterator;
 111
 112 void MDLSurface_read( Surface& surface, const byte* buffer, const char* name ){
 113         mdlHeader_t header;
 114
 115         PointerInputStream inputStream( buffer );
 116         istream_read_mdlHeader( inputStream, header );
 117
 118         for ( int i = 0; i < header.numskins; ++i )
 119         {
 120                 switch ( istream_read_int32_le( inputStream ) )
 121                 {
 122                 case MDL_SKIN_SINGLE:
 123                         inputStream.seek( header.skinwidth * header.skinheight );
 124                         break;
 125                 case MDL_SKIN_GROUP:
 126                         int numskins = istream_read_int32_le( inputStream );
 127                         inputStream.seek( numskins * ( 4 + ( header.skinwidth * header.skinheight ) ) );
 128                         break;
 129                 }
 130         }
 131
 132         Array<mdlSt_t> mdlSts( header.numverts );
 133         for ( Array<mdlSt_t>::iterator i = mdlSts.begin(); i != mdlSts.end(); ++i )
 134         {
 135                 ( *i ).onseam = istream_read_int32_le( inputStream );
 136                 ( *i ).s = istream_read_int32_le( inputStream );
 137                 ( *i ).t = istream_read_int32_le( inputStream );
 138         }
 139
 140         Array<mdlTriangle_t> mdlTriangles( header.numtris );
 141         for ( Array<mdlTriangle_t>::iterator i = mdlTriangles.begin(); i != mdlTriangles.end(); ++i )
 142         {
 143                 ( *i ).facesfront = istream_read_int32_le( inputStream );
 144                 ( *i ).vertindex[0] = istream_read_int32_le( inputStream );
 145                 ( *i ).vertindex[1] = istream_read_int32_le( inputStream );
 146                 ( *i ).vertindex[2] = istream_read_int32_le( inputStream );
 147         }
 148
 149         {
 150                 bool found = false;
 151                 for ( int i = 0; i < header.numframes && found == false; i++ )
 152                 {
 153                         switch ( istream_read_int32_le( inputStream ) )
 154                         {
 155                         case MDL_FRAME_SINGLE:
 156                                 inputStream.seek( MDL_FRAME_SIZE );
 157                                 found = true;
 158                                 break;
 159                         case MDL_FRAME_GROUP:
 160                                 int numframes = istream_read_int32_le( inputStream );
 161                                 inputStream.seek( ( MDL_XYZNORMAL_SIZE * 2 ) + ( numframes * 4 ) );
 162                                 found = true;
 163                                 break;
 164                         }
 165                 }
 166         }
 167
 168         Array<mdlXyzNormal_t> mdlXyzNormals( header.numtris );
 169         for ( Array<mdlXyzNormal_t>::iterator i = mdlXyzNormals.begin(); i != mdlXyzNormals.end(); ++i )
 170         {
 171                 inputStream.read( ( *i ).v, 3 );
 172                 inputStream.read( &( *i ).lightnormalindex, 1 );
 173         }
 174
 175         {
 176                 VertexBuffer<mdlVertex_t> mdl_vertices;
 177
 178                 {
 179                         UniqueVertexBuffer<mdlVertex_t> inserter( mdl_vertices );
 180                         for ( Array<mdlTriangle_t>::iterator i = mdlTriangles.begin(); i != mdlTriangles.end(); ++i )
 181                         {
 182                                 surface.indices().insert( inserter.insert( mdlVertex_t( ( *i ).vertindex[0], ( *i ).facesfront ) ) );
 183                                 surface.indices().insert( inserter.insert( mdlVertex_t( ( *i ).vertindex[1], ( *i ).facesfront ) ) );
 184                                 surface.indices().insert( inserter.insert( mdlVertex_t( ( *i ).vertindex[2], ( *i ).facesfront ) ) );
 185                         }
 186                 }
 187
 188                 {
 189                         surface.vertices().reserve( mdl_vertices.size() );
 190
 191                         for ( VertexBuffer<mdlVertex_t>::iterator i = mdl_vertices.begin(); i != mdl_vertices.end(); ++i )
 192                         {
 193                                 surface.vertices().push_back( MDLVertex_construct( header, mdlXyzNormals[( *i ).m_vertindex], mdlSts[( *i ).m_vertindex], ( *i ).m_facesfront == MDL_FACES_FRONT ) );
 194                         }
 195                 }
 196         }
 197
 198         surface.setShader( name );
 199         surface.updateAABB();
 200 }
 201
 202 void MDLModel_read( Model& model, const byte* buffer, const char* name ){
 203         MDLSurface_read( model.newSurface(), buffer, name );
 204         model.updateAABB();
 205 }
 206
 207 scene::Node& MDLModel_new( const byte* buffer, const char* name ){
 208         ModelNode* modelNode = new ModelNode();
 209         MDLModel_read( modelNode->model(), buffer, name );
 210         return modelNode->node();
 211 }
 212
 213 scene::Node& MDLModel_default(){
 214         ModelNode* modelNode = new ModelNode();
 215         Model_constructNull( modelNode->model() );
 216         return modelNode->node();
 217 }
 218
 219 scene::Node& MDLModel_fromBuffer( unsigned char* buffer, const char* name ){
 220         if ( !ident_equal( buffer, MDL_IDENT ) ) {
 221                 globalErrorStream() << "MDL read error: incorrect ident\n";
 222                 return MDLModel_default();
 223         }
 224         else
 225         {
 226                 return MDLModel_new( buffer, name );
 227         }
 228 }
 229
 230 scene::Node& loadMDLModel( ArchiveFile& file ){
 231         ScopedArchiveBuffer buffer( file );
 232         return MDLModel_fromBuffer( buffer.buffer, file.getName() );
 233 }