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ALoad.cpp

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/*
CS Senior Project 2003
Team : Leftfield
Project : ModernWarfare
Members :
- Russ Christensen              <rchriste@cs.utah.edu>
- Todd Smith                    <tcsmith@cs.utah.edu>
- Usit Duongsaa                 <duongsaa@cs.utah.edu>
Copyright 2003 Russ Christensen, Usit Duongsaa, and Todd Smith. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 
THIS SOFTWARE IS PROVIDED BY RUSS CHRISTENSEN, USIT DUONGSAA, AND TODD SMITH ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RUSS, USIT, TODD OR OTHER CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "AEngine.h"
#include "AUtil.h"
#include "ASharedFunc.h"

//------------------------------------------------------------------------------------
AFont load_font( string fontName, string filename )
{
        AS.res_fonts.push_back( util_loadFont(fontName,filename,18) );
        return (int)AS.res_fonts.size()-1;
}
//------------------------------------------------------------------------------------
AMesh load_mesh( string filename )
{
        ifstream f(filename.c_str());
        if(!f) throw Error("Can't read mesh file : "+filename );

        vector<Vec3D> vec_pos, vec_normal;
        vector<Vec2D> vec_uv;
        string cmd;
        FLOAT f1, f2, f3;
        FLOAT minX, maxX, minY, maxY, minZ, maxZ;
        minX = minY = minZ =  100000.0f;
        maxX = maxY = maxZ = -100000.0f;

        // read it vertex pos, texture, normal arrays
        while(true)
        {
                f >> cmd;
                if( cmd=="#" )                          // just a comment line.  ignore it              
                {
                        getline( f, cmd );
                }
                else if( cmd=="v" )                     // vertex position
                {
                        f >> f1 >> f2 >> f3;
                        vec_pos.push_back( Vec3D(f1,f2,f3) );
                        if(f1<minX) minX=f1; else if(f1>maxX) maxX=f1;
                        if(f2<minY) minY=f2; else if(f2>maxY) maxY=f2;
                        if(f3<minZ) minZ=f3; else if(f3>maxZ) maxZ=f3;
                }
                else if( cmd=="vt" )            // texture coordinate
                {
                        f >> f1 >> f2 >> f3;
                        vec_uv.push_back( Vec2D(f1,1.0f-f2) );
                }
                else if( cmd=="vn" )            // normal
                {
                        f >> f1 >> f2 >> f3;
                        vec_normal.push_back( Vec3D(f1,f2,f3) );
                }
                else if( cmd=="g"  )            // end of vertex info list
                {
                        getline( f, cmd );
                        break;
                }
        }

        // read in triangle indices, create&map tuples
        map< Int3Tuple, int >   tuplesMap;
        vector<Int3Tuple>               vertices;
        vector<USHORT>                  indices;        
        map<Int3Tuple,int>::iterator iter;
        char skip;
        int posIndex, uvIndex, normalIndex;

        while(true)
        {
                f >> cmd;
                if( cmd!="f" ) break;

                // read the 3 corners of a triangle
                for( int corner=0; corner<3; corner++ )
                {
                        f >> posIndex >> skip >> uvIndex >> skip >> normalIndex;
                        Int3Tuple tuple(posIndex-1,uvIndex-1,normalIndex-1);            // -1 because .obj is 1-based
                        iter = tuplesMap.find(tuple);
                        if( iter==tuplesMap.end() )                             // if this vertex is new, add it
                        {
                                tuplesMap[tuple] = (int) vertices.size();
                                indices.push_back( (USHORT)vertices.size() );
                                vertices.push_back(tuple);                      
                        }
                        else                                                                    // but if it's already there, use existing vertex number
                                indices.push_back( iter->second );
                }

        }

        // concat new data to entire Mesh VB&IB
        int vertexOffset = (int) AS.mesh_raw_vb.size();
        int indexOffset  = (int) AS.mesh_raw_ib.size();
        MeshVertex v;
        for( UINT i=0; i<vertices.size(); i++ )         // add all vertices
        {
                v.pos    = vec_pos[    vertices[i].a ];
                v.uv     = vec_uv[     vertices[i].b ];
                v.normal = vec_normal[ vertices[i].c ];
                v.cindex = 0;
                AS.mesh_raw_vb.push_back(v);
        }
        for( UINT i=0; i<indices.size(); i++ )          // add all indices
        {
                AS.mesh_raw_ib.push_back( indices[i]+vertexOffset );
        }

        // add MeshEntry
        MeshEntry entry;
        entry.IBstart = indexOffset;
        entry.TriCount = (UINT) indices.size() / 3;
        entry.VBcount =  (UINT) vertices.size();
        entry.VBmin   = vertexOffset;
        entry.size = Vec3D( maxX-minX, maxY-minY, maxZ-minZ );
        AS.res_meshes.push_back( entry );

        return (int)AS.res_meshes.size() - 1;
}
//------------------------------------------------------------------------------------
ATexture load_texture( string filename )
{
        LPDIRECT3DTEXTURE8 pTexture;
        HRESULT hr = D3DXCreateTextureFromFile( AS.pDevice, filename.c_str(), &pTexture );
        if( FAILED(hr) ) throw Error("Cannot Load Texture : "+filename);
        AS.res_textures.push_back(pTexture);
        return (int)AS.res_textures.size()-1;
}
//------------------------------------------------------------------------------------
ATerrain load_terrain( string filename, FLOAT sizeX, FLOAT sizeY, FLOAT sizeZ, FLOAT offsetZ )
{
        return terrain_create(filename,sizeX,sizeY,sizeZ,offsetZ);      
}
//------------------------------------------------------------------------------------

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