source: GTP/trunk/App/Demos/Vis/FriendlyCulling/VboFormatConverter/VboFormatConverter.cpp @ 3120

#include "VboFormatConverter.h"
#include "SimpleTri.h"
#include "SimpleVec.h"
#include "gzstream.h"
#include <iostream>


using namespace std;


VboFormatConverter::VboFormatConverter()
{}


VboFormatConverter::~VboFormatConverter()
{
        for (size_t i = 0; i < mGeometry.size(); ++ i)
        {
                delete [] mGeometry[i]->mVertices;
                delete [] mGeometry[i]->mNormals;
                delete [] mGeometry[i]->mTexcoords;

                delete mGeometry[i];
        }
        
        mGeometry.clear();
}


bool VboFormatConverter::Convert(const string &filename,
                                                                 const std::string &outputFilename)
{
        mNumShapes = 0;
        
        for (size_t i = 0; i < mGeometry.size(); ++ i)
        {
                delete [] mGeometry[i]->mVertices;
                delete [] mGeometry[i]->mNormals;
                delete [] mGeometry[i]->mTexcoords;

                delete mGeometry[i];
        }
        
        mGeometry.clear();

        if (!ReadFile(filename))
        {
                cerr << "could not read file" << endl;
                return false;
        }

        if (!WriteFile(outputFilename))
        {
                cerr << "could not write file" << endl;
                return false;
        }


        return true;
}


bool VboFormatConverter::ReadFile(const string &filename) 
{
        FILE *file;
        if ((file = fopen(filename.c_str(), "r")) == NULL) return false;
        
        int line = 0;

        const int len = 10000;
        char str[len];

        int numElements;

        // first line only holds number of vertices
        fgets(str, len, file);
        sscanf(str, "%d", &numElements);

        Geometry *geom = new Geometry();

        // convert the triangles to geometry
        geom->mVertexCount = numElements;
        geom->mVertices = new SimpleVec[numElements];
        geom->mNormals = new SimpleVec[numElements];
        geom->mTexcoords = new Texcoord[numElements];

        SimpleVec vtx, normal, tangent;
        Texcoord tex;

        cout << "elements: " << numElements << endl;
        while (fgets(str, len, file) != NULL)
        {
                sscanf(str, "%f %f %f %f %f %f %f %f %f %f %f", 
                       &vtx.x, &vtx.z, &vtx.y, 
                           &normal.x, &normal.z, &normal.y, 
                           &tex.first, &tex.second,
                           &tangent.x, &tangent.y, &tangent.z);

                const float scale = 0.05f;
                vtx.x *= scale;
                vtx.y *= scale;
                vtx.z *= scale;

                geom->mVertices[line] = vtx;
                geom->mNormals[line] = normal;
                geom->mTexcoords[line] = tex;

                ++ line;
        }

        mGeometry.push_back(geom);

        mNumShapes = 1;
        fclose(file);
        
        return true;
}


void VboFormatConverter::WriteGeometry(ogzstream &str, Geometry *geom)
{
        int vertexCount = geom->mVertexCount;
        str.write(reinterpret_cast<char *>(&vertexCount), sizeof(int));
  
        str.write(reinterpret_cast<char *>(geom->mVertices), sizeof(SimpleVec) * vertexCount);
        str.write(reinterpret_cast<char *>(geom->mNormals), sizeof(SimpleVec) * vertexCount);

        int texCoordCount = geom->mTexcoordCount;
        str.write(reinterpret_cast<char *>(&texCoordCount), sizeof(int));

        if (texCoordCount)
                str.write(reinterpret_cast<char *>(geom->mTexcoords), sizeof(float) * texCoordCount * 2);
        

        ///////
        //-- texture

        int texId = -1;
        //int texId = 0;
        str.write(reinterpret_cast<char *>(&texId), sizeof(int));

        bool alphaTestEnabled = false;
        bool cullFaceEnabled = false;
        //bool cullFaceEnabled = true;

        str.write(reinterpret_cast<char *>(&alphaTestEnabled), sizeof(bool));
        str.write(reinterpret_cast<char *>(&cullFaceEnabled), sizeof(bool));

        // material
        bool hasMaterial = true;
        //bool hasMaterial = false;
        str.write(reinterpret_cast<char *>(&hasMaterial), sizeof(bool));
        
        if (hasMaterial)
        {
                SimpleVec ambient, diffuse, black;

                ambient.x = ambient.y = ambient.z = 0.2f;
                diffuse.x = diffuse.y = diffuse.z = 1.0f;
                black.x   = black.y   = black.z   = .0f;

                // only write rgb part of the material
                str.write(reinterpret_cast<char *>(&ambient), sizeof(SimpleVec));
                str.write(reinterpret_cast<char *>(&diffuse), sizeof(SimpleVec));
                str.write(reinterpret_cast<char *>(&black), sizeof(SimpleVec));
                str.write(reinterpret_cast<char *>(&black), sizeof(SimpleVec));
        }
}


bool VboFormatConverter::WriteFile(const string &filename)
{
        ogzstream ofile(filename.c_str());

        if (!ofile.is_open())
                return false;
        

        /////////
        //-- write textures

        //int textureCount = 1;
        int textureCount = 0;

        ofile.write(reinterpret_cast<char *>(&textureCount), sizeof(int));

        if (textureCount > 0)
        {
                // hack
                const string texName("wood.jpg");

                int texnameSize = (int)texName.length() + 1;
                ofile.write(reinterpret_cast<char *>(&texnameSize), sizeof(int));

                ofile.write(texName.c_str(), sizeof(char) * texnameSize);

                int boundS = 1, boundT = 1;

                ofile.write(reinterpret_cast<char *>(&boundS), sizeof(int));
                ofile.write(reinterpret_cast<char *>(&boundT), sizeof(int));
        }


        ///////////
        //-- write shapes

        ofile.write(reinterpret_cast<char *>(&mNumShapes), sizeof(int));

        vector<Geometry *>::const_iterator it, it_end = mGeometry.end();

        for (it = mGeometry.begin(); it != it_end; ++ it)
        {
                WriteGeometry(ofile, *it);
        }


        int entityCount = 1;
        ofile.write(reinterpret_cast<char *>(&entityCount), sizeof(int));


        //////////
        //-- write single scene entity

        // no transformation
        bool hasTrafo = false;
        ofile.write(reinterpret_cast<char *>(&hasTrafo), sizeof(bool));

        // a dummy lod
        int numLODs = 1;
        ofile.write(reinterpret_cast<char *>(&numLODs), sizeof(int));

        float dist = 0;
        ofile.write(reinterpret_cast<char *>(&dist), sizeof(float));

        ofile.write(reinterpret_cast<char *>(&mNumShapes), sizeof(int));

        // all shapes belong to this scene entity
        for (int i = 0; i < mNumShapes; ++ i)
        {
                int shapeId = i;
                ofile.write(reinterpret_cast<char *>(&shapeId), sizeof(int));
        }

        return true;
}