313 lines
8.8 KiB
C++
313 lines
8.8 KiB
C++
/*
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Copyright (C) 2001-2006, William Joseph.
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Copyright (C) 2010-2014 COR Entertainment, LLC.
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All Rights Reserved.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "iqm.h"
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#include "ifilesystem.h"
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#include "imodel.h"
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#include "imagelib.h"
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#include "bytestreamutils.h"
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#include "../md3model/model.h"
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typedef unsigned char byte;
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/*
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========================================================================
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.IQM triangle model file format
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========================================================================
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*/
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typedef struct {
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float s;
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float t;
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} iqmSt_t;
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void istream_read_iqmSt( PointerInputStream &inputStream, iqmSt_t &st ){
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st.s = istream_read_float32_le( inputStream );
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st.t = istream_read_float32_le( inputStream );
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}
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typedef struct {
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unsigned int indices[3];
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} iqmTriangle_t;
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void istream_read_iqmTriangle( PointerInputStream &inputStream, iqmTriangle_t &triangle ){
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triangle.indices[0] = istream_read_int32_le( inputStream );
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triangle.indices[1] = istream_read_int32_le( inputStream );
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triangle.indices[2] = istream_read_int32_le( inputStream );
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}
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typedef struct {
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float v[3];
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} iqmPos_t;
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void istream_read_iqmPos( PointerInputStream &inputStream, iqmPos_t &iqmPos ){
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iqmPos.v[0] = istream_read_float32_le( inputStream );
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iqmPos.v[1] = istream_read_float32_le( inputStream );
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iqmPos.v[2] = istream_read_float32_le( inputStream );
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}
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const int IQM_POSITION = 0;
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const int IQM_TEXCOORD = 1;
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const int IQM_NORMAL = 2;
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const int IQM_TANGENT = 3;
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const int IQM_BLENDINDEXES = 4;
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const int IQM_BLENDWEIGHTS = 5;
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const int IQM_COLOR = 6;
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const int IQM_CUSTOM = 0x10;
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const int IQM_BYTE = 0;
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const int IQM_UBYTE = 1;
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const int IQM_SHORT = 2;
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const int IQM_USHORT = 3;
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const int IQM_INT = 4;
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const int IQM_UINT = 5;
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const int IQM_HALF = 6;
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const int IQM_FLOAT = 7;
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const int IQM_DOUBLE = 8;
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// animflags
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const int IQM_LOOP = 1;
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typedef struct iqmHeader_s {
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byte id[16];
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unsigned int version;
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unsigned int filesize;
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unsigned int flags;
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unsigned int num_text, ofs_text;
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unsigned int num_meshes, ofs_meshes;
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unsigned int num_vertexarrays, num_vertexes, ofs_vertexarrays;
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unsigned int num_triangles, ofs_triangles, ofs_neighbors;
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unsigned int num_joints, ofs_joints;
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unsigned int num_poses, ofs_poses;
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unsigned int num_anims, ofs_anims;
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unsigned int num_frames, num_framechannels, ofs_frames, ofs_bounds;
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unsigned int num_comment, ofs_comment;
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unsigned int num_extensions, ofs_extensions;
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} iqmHeader_t;
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void istream_read_iqmHeader( PointerInputStream &inputStream, iqmHeader_t &header ){
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inputStream.read( header.id, 16 );
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#define READINT( x ) header.x = istream_read_int32_le( inputStream );
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READINT( version )
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READINT( filesize )
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READINT( flags )
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READINT( num_text )
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READINT( ofs_text )
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READINT( num_meshes )
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READINT( ofs_meshes )
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READINT( num_vertexarrays )
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READINT( num_vertexes )
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READINT( ofs_vertexarrays )
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READINT( num_triangles )
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READINT( ofs_triangles )
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READINT( ofs_neighbors )
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READINT( num_joints )
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READINT( ofs_joints )
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READINT( num_frames )
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READINT( num_framechannels )
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READINT( ofs_frames )
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READINT( ofs_bounds )
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READINT( num_comment )
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READINT( ofs_comment )
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READINT( num_extensions )
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READINT( ofs_extensions )
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#undef READINT
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}
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typedef struct iqmmesh_s {
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unsigned int name;
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unsigned int material;
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unsigned int first_vertex;
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unsigned int num_vertexes;
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unsigned int first_triangle;
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unsigned int num_triangles;
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} iqmmesh_t;
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void istream_read_iqmMesh( PointerInputStream &inputStream, iqmmesh_t &iqmmesh ){
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#define READUINT( x ) iqmmesh.x = istream_read_uint32_le( inputStream );
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READUINT( name )
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READUINT( material )
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READUINT( first_vertex )
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READUINT( num_vertexes )
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READUINT( first_triangle )
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READUINT( num_triangles )
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#undef READUINT
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}
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typedef struct iqmvertexarray_s {
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unsigned int type;
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unsigned int flags;
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unsigned int format;
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unsigned int size;
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unsigned int offset;
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} iqmvertexarray_t;
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void istream_read_iqmVertexarray( PointerInputStream &inputStream, iqmvertexarray_t &vertexarray ){
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#define READINT( x ) vertexarray.x = istream_read_int32_le( inputStream );
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READINT( type )
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READINT( flags )
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READINT( format )
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READINT( size )
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READINT( offset )
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#undef READINT
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}
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ArbitraryMeshVertex IQMVertex_construct( const iqmPos_t *pos, const iqmPos_t *norm, const iqmSt_t *st ){
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return ArbitraryMeshVertex(
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Vertex3f( pos->v[0], pos->v[1], pos->v[2] ),
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Normal3f( norm->v[0], norm->v[1], norm->v[2] ),
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TexCoord2f( st->s, st->t )
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);
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}
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void IQMSurface_read( Model &model, const byte *buffer, ArchiveFile &file ){
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iqmHeader_t header;
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{
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PointerInputStream inputStream( buffer );
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istream_read_iqmHeader( inputStream, header );
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}
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int ofs_position = -1, ofs_st = -1, ofs_normal = -1;
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PointerInputStream vaStream( buffer + header.ofs_vertexarrays );
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for ( unsigned int i = 0; i < header.num_vertexarrays; i++ ) {
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iqmvertexarray_t va;
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istream_read_iqmVertexarray( vaStream, va );
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switch ( va.type ) {
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case IQM_POSITION:
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if ( va.format == IQM_FLOAT && va.size == 3 ) {
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ofs_position = va.offset;
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}
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break;
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case IQM_TEXCOORD:
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if ( va.format == IQM_FLOAT && va.size == 2 ) {
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ofs_st = va.offset;
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}
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break;
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case IQM_NORMAL:
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if ( va.format == IQM_FLOAT && va.size == 3 ) {
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ofs_normal = va.offset;
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}
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break;
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}
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}
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PointerInputStream posStream( buffer + ofs_position );
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Array<iqmPos_t> iqmPos( header.num_vertexes );
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for ( Array<iqmPos_t>::iterator i = iqmPos.begin(); i != iqmPos.end(); ++i ) {
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istream_read_iqmPos( posStream, *i );
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}
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PointerInputStream normStream( buffer + ofs_normal );
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Array<iqmPos_t> iqmNorm( header.num_vertexes );
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for ( Array<iqmPos_t>::iterator i = iqmNorm.begin(); i != iqmNorm.end(); ++i ) {
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istream_read_iqmPos( normStream, *i );
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}
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Array<iqmSt_t> iqmSt( header.num_vertexes );
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PointerInputStream stStream( buffer + ofs_st );
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for ( Array<iqmSt_t>::iterator i = iqmSt.begin(); i != iqmSt.end(); ++i ) {
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istream_read_iqmSt( stStream, *i );
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}
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PointerInputStream iqmMesh( buffer + header.ofs_meshes );
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for ( unsigned int m = 0; m < header.num_meshes; m++ ) {
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Surface &surface = model.newSurface();
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iqmmesh_t iqmmesh;
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istream_read_iqmMesh( iqmMesh, iqmmesh );
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bool material_found = false;
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// if not malformed data neither missing string
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if ( iqmmesh.material <= header.num_text && iqmmesh.material > 0 ) {
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char *material;
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material = (char*) buffer + header.ofs_text + iqmmesh.material;
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if ( material[0] != '\0' ) {
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surface.setShader( material );
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material_found = true;
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}
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}
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if ( !material_found ) {
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// empty string will trigger "textures/shader/notex" on display
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surface.setShader( "" );
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}
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UniqueVertexBuffer<ArbitraryMeshVertex> inserter( surface.vertices() );
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inserter.reserve( iqmmesh.num_vertexes );
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surface.indices().reserve( iqmmesh.num_vertexes );
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unsigned int triangle_offset = header.ofs_triangles + iqmmesh.first_triangle * sizeof( iqmTriangle_t );
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PointerInputStream triangleStream( buffer + triangle_offset );
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for ( unsigned int i = 0; i < iqmmesh.num_triangles; ++i ) {
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iqmTriangle_t triangle;
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istream_read_iqmTriangle( triangleStream, triangle );
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for ( int j = 0; j < 3; j++ ) {
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surface.indices().insert( inserter.insert( IQMVertex_construct(
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&iqmPos[triangle.indices[j]],
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&iqmNorm[triangle.indices[j]],
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&iqmSt[triangle.indices[j]] ) ) );
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}
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}
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surface.updateAABB();
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}
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}
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void IQMModel_read( Model &model, const byte *buffer, ArchiveFile &file ){
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IQMSurface_read( model, buffer, file );
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model.updateAABB();
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}
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scene::Node &IQMModel_new( const byte *buffer, ArchiveFile &file ){
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ModelNode *modelNode = new ModelNode();
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IQMModel_read( modelNode->model(), buffer, file );
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return modelNode->node();
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}
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scene::Node &IQMModel_default(){
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ModelNode *modelNode = new ModelNode();
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Model_constructNull( modelNode->model() );
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return modelNode->node();
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}
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scene::Node &IQMModel_fromBuffer( unsigned char *buffer, ArchiveFile &file ){
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if ( memcmp( buffer, "INTERQUAKEMODEL", 16 ) ) {
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globalErrorStream() << "IQM read error: incorrect ident\n";
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return IQMModel_default();
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}
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else {
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return IQMModel_new( buffer, file );
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}
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}
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scene::Node &loadIQMModel( ArchiveFile &file ){
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ScopedArchiveBuffer buffer( file );
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return IQMModel_fromBuffer( buffer.buffer, file );
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}
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