readerwriterdw.cpp

最新osg包

    }
    inline void setmx(Matrix *m) { mx=m;}
private:
    Vec4 colour;
    std::vector<Vec3> verts;
    dwmaterial *themat;
    unsigned short nverts,nfaces,nedges;
    unsigned short nfaceverts;
    unsigned short nopens;
    _face *faces;
    _dwedge *edges;
    int *openings;
    unsigned short *fc1, *fc2; // openings[i] is in faces[fc1[i]] to faces[fc2[i]]
    Matrix *tmat;
    Matrix *mx; // current uvw transform for currently tessealting face
};

void _face::tessellate(const std::vector<Vec3> verts, const dwmaterial *themat, 
               GLUtesselator *ts, _dwobj *dwob, const Matrix * /*tmat*/) const {
    int nvall=getallverts();
    int nused=0;
    avertex *poses=new avertex[2*nvall]; // passed to Tessellator to redraw
    Matrix mx; // texture matrix transform to plane
    settrans(mx, nrm, verts,themat);
    dwob->setmx(&mx); // may be used by combine callback to define txcoord
    gluTessBeginPolygon(ts, dwob); 
    gluTessBeginContour(ts); /**/
    for (int j=0; j<nv; j++) {
        Vec3 uv;
        uv=mx*verts[idx[j]];
        setposes(poses[nused], j, verts);
        poses[nused].uv[0]=uv[0];
        poses[nused].uv[1]=uv[1];
        gluTessVertex(ts, (double *)&(poses[nused]), (double *)(poses+nused));
        nused++;
    }
    gluTessEndContour(ts); 
    for (int k=0; k<nop; k++) { // now holes in the face
        gluTessBeginContour(ts);
        for (int j=0; j<opening[k].nv; j++) {
            Vec3 uv;
            uv=mx*verts[opening[k].idx[j]];
            opening[k].setposes(poses[nused], j, verts);
            poses[nused].nrmv*=-1; // get to agree with base polygon
            poses[nused].nrmv=nrm;
            poses[nused].uv[0]=uv[0];
            poses[nused].uv[1]=uv[1];
            gluTessVertex(ts, (double *)&(poses[nused]), (double *)(poses+nused));
            nused++;
        }
        gluTessEndContour(ts);/* */
    }
    gluTessEndPolygon(ts);
    delete [] poses;
}
void prims::combine( GLdouble coords[3], avertex *d[4], 
                    GLfloat w[4], avertex **dataOut , _dwobj *dwob) {
    avertex *newv = new avertex(); // (avertex *)calloc(1, sizeof(avertex)); 
    newv->pos[0] = coords[0]; 
    newv->pos[1] = coords[1]; 
    newv->pos[2] = coords[2];
    newv->uv[0] = newv->uv[1] =0;
    newv->nrmv[0] = newv->nrmv[1] = newv->nrmv[2] =0;
    for (int i=0; i<4; i++) {
        if (d[i]) {
            newv->uv[0] = w[i]*d[i]->uv[0];
            newv->uv[1] = w[i]*d[i]->uv[1];
            newv->nrmv[0] = w[i]*d[i]->nrmv[0];
            newv->nrmv[1] = w[i]*d[i]->nrmv[1];
            newv->nrmv[2] = w[i]*d[i]->nrmv[2];
        }
    }
    dwob->makeuv(newv->uv, newv->pos);
    newv->idx=dwob->addvtx(coords[0], coords[1], coords[2]);
    *dataOut = newv;
}
void _dwobj::buildDrawable(Group *grp, const osgDB::ReaderWriter::Options *options)
{  // current DWobject complete; make a drawable, and add it to a osg::Group
    if (nfaces>0) {
        if (themat->isType(dwmaterial::PointLight) || themat->isType(dwmaterial::SpotLight)) {
            Vec4 pos;
            pos.set(0.0f,0.0f,0.0f,0.0f);
            for (int i=0; i<nverts; i++) {
                pos[0]+=verts[i].x();
                pos[1]+=verts[i].y();
                pos[2]+=verts[i].z();
            }
            pos/=nverts;
            pos[3]=1.0f;
            LightSource *ls=themat->makeLight(pos);
            grp->addChild(ls);
        } else {
            Geode *geode = new Geode;
            int nfnvf=0; // number of vertices for faces plus holes
            int i; // a general counter
            for (i=0; i<nfaces; i++) { // for each face
                faces[i].setnorm(verts); // set its normal and any hole normals
                nfnvf+=faces[i].getallverts(); // get total vertices in object, defines dimensions of NEW arrays
            }
            
            
            GLUtesselator* ts=gluNewTess();
            gluTessCallback(ts, GLU_TESS_BEGIN, (GLU_TESS_CALLBACK) myFaceBegin);  
            gluTessCallback(ts, GLU_TESS_VERTEX, (GLU_TESS_CALLBACK) myVertex);  
            gluTessCallback(ts, GLU_TESS_END, (GLU_TESS_CALLBACK) myFaceEnd);  
            gluTessCallback(ts, GLU_TESS_ERROR, (GLU_TESS_CALLBACK) error);  
            gluTessCallback(ts, GLU_TESS_COMBINE_DATA, (GLU_TESS_CALLBACK) combineCallback);
            //  for (int nvf=0; nvf<6; nvf++) { // for each length of face
            // for Geometry we dont need to collect prim types individually
            //     prd.setmode(nvf , nfnvf); // filter out only this type of tessellated face
            prd=new prims;
            prd->settmat(tmat);
            osg::Geometry *gset = new osg::Geometry;
            prd->setGeometry(gset);
            StateSet *dstate=themat->make(options);            
            gset->setStateSet( dstate );
            grp->addChild( geode ); // add to the world outside
            geode->addDrawable(gset);
            
            // each face adds a primitive to the geometry, after it is tessellated
            for (i=0; i<nfaces; i++) { // for each face, collect up
                prd->tessellate(faces[i],verts, themat, ts, this);
            }
            for (i=0; i<nopens; i++) { // for each hole, join up front & back with Quads
                if (fc1 && fc2) {
                    faces[fc1[i]].link(openings[i*2], &faces[fc2[i]],openings[i*2+1],verts, themat);
                }
            } // for each opening
            prd->buildGeometry();
        gluDeleteTess(ts);
        delete prd;
        }
    } // nfaces>0
    verts.clear();
}
////////// tessellation complete

class ReaderWriterDW : public osgDB::ReaderWriter
{
    public:
    
        ReaderWriterDW()
        {
            supportsExtension("dw","Designer Workbench model format");
        }
    
        virtual const char* className() const { return "Design Workshop Database Reader"; }

        virtual ReadResult readNode(const std::string& file,const osgDB::ReaderWriter::Options* options) const
        {

            std::string ext = osgDB::getLowerCaseFileExtension(file);
            if (!acceptsExtension(ext)) return ReadResult::FILE_NOT_HANDLED;

            std::string fileName = osgDB::findDataFile( file, options );
            if (fileName.empty()) return ReadResult::FILE_NOT_FOUND;


            _dwobj obj;
            enum reading {NONE, MATERIAL, OBJECT};
            //unsigned short nrecs=0; // number of records read after a divider (numVerts, numFaces, numOpenings...)
            int nexpected=0; // number of records to be read in a block
            dwmaterial *matpalet=NULL;
            int nmat=-1; // current element of matpalet being modified
            int nmn=0; // number of materials found
            reading rdg=NONE;

            char buff[256];

            notify(INFO)<<   "ReaderWriterDW::readNode( "<<fileName.c_str()<<" )\n";
#ifdef _MSC_VER
            notify(osg::NOTICE)<<   "MS Visual C++ version "<<_MSC_VER<<"\n";
#endif

            FILE *fp;

            if( (fp = osgDB::fopen( fileName.c_str(), "r" )) == (FILE *)0L )
            {
                return std::string("Unable to open file \""+fileName+"\"");
            }
            Group *grp = new Group;

            // code for setting up the database path so that internally referenced file are searched for on relative paths. 
            osg::ref_ptr<Options> local_opt = options ? static_cast<Options*>(options->clone(osg::CopyOp::SHALLOW_COPY)) : new Options;
            local_opt->setDatabasePath(osgDB::getFilePath(fileName));


            while( !feof( fp ) )
            { // reads the Design Workshop format in ASCII
                if (dwfgets( buff, sizeof( buff ), fp )) {
                    if( buff[0] == '#' )
                        continue;
                    else if( strncmp(buff,"numMaterials:",13)==0) { // No of materials
                        nmn=atoi(buff+14);
                        matpalet=new dwmaterial[nmn];
                    } else if( strncmp(buff,"Material:",9)==0) { // No of materials
                        dwfgets(buff, sizeof( buff ), fp );
                        nmat++;
                        rdg=MATERIAL;
                        int id=atoi(buff);
                        matpalet[nmat].setid(id); // current material to be modified
                        
                    } else if (strncmp(buff, "Phase:",6)==0) {
                    } else if (strncmp(buff, "CurrPhase:",10)==0) {
                    } else if (strncmp(buff, "numPhases:",10)==0) {
                    } else if (strncmp(buff, "Opacity:",8)==0) {
                        float opacity=atof(buff+8);
                        matpalet[nmat].setopacity(opacity);
                    } else if (strncmp(buff, "FallOff:",8)==0) {
                        float fo=atof(buff+8);
                        matpalet[nmat].setFallOff(fo);
                    } else if (strncmp(buff, "InnerHalfAngle:",15)==0) {
                        float ha=atof(buff+15);
                        matpalet[nmat].setHalfAngleIn(ha);
                    } else if (strncmp(buff, "OuterHalfAngle:",15)==0) {
                        float ha=atof(buff+15);
                        matpalet[nmat].setHalfAngleOut(ha);
                    } else if (strncmp(buff, "Brightness:",11)==0) {
                        float br=atof(buff+11);
                        matpalet[nmat].setBright(br);
                    } else if (strncmp(buff, "Attentuation:",13)==0) { // oops - they can't spell
                        matpalet[nmat].setAtten(buff+13);
                    } else if (strncmp(buff, "MaterialType:",13)==0) {
                        matpalet[nmat].setType(buff+14);
                    } else if (strncmp(buff, "SpecularReflectivity:",21)==0) {
                        float spec=atof(buff+21);
                        matpalet[nmat].setspecular(spec);
                    } else if (strncmp(buff, "SmoothnessExponent:",19)==0) {
                        float spec=atof(buff+19);
                        matpalet[nmat].setspecexp(spec*128.0f/100.0f); // convert to 0-128 range from percent
                    } else if (strncmp(buff, "TextureWidthAndHeight:",22)==0) {
                        char *ct=strchr(buff+22,',');
                        float repx=atof(buff+23), repy=atof(ct+1);
                        matpalet[nmat].settxrep(repx, repy);
                    } else if (strncmp(buff, "PictureFile:",12)==0) {
                        char *end=strchr(buff,'\n'); // end of line
                        if (end) *end='\0'; // removed
                        matpalet[nmat].setfname(buff);
                    } else if( strncmp(buff,"Extrusion:",10)==0 ||
                        strncmp(buff,"Cube:",5)==0 || 
                        strncmp(buff,"Polyline:",9)==0 || 
                        strncmp(buff,"Polyhedron:",11)==0) {
                        rdg=OBJECT;
                        obj.buildDrawable(grp, options);
                        obj.reset();
                    } else if( strncmp(buff,"Mat:",4)==0) {
                        int mt=atoi(buff+4);
                        for (int j=0; j<nmn; j++) {
                            if (matpalet[j].getid() == mt) 
                                obj.setmat(&(matpalet[j]));
                        }
                    } else if( strncmp(buff,"Color:",6)==0) {
                        float rgb[3];
                        if (rdg==MATERIAL) { // get material colour
                            sscanf(buff+6,"%f %f %f", &rgb[0], &rgb[1], &rgb[2]);
                            matpalet[nmat].setcolour(rgb);
                        } else if (rdg==OBJECT) {
                            float rgb[3];
                            sscanf(buff+6,"%f %f %f", &rgb[0], &rgb[1], &rgb[2]);
                            rgb[0]/=65536.0f; // convert to range 0-1
                            rgb[1]/=65536.0f; // convert to range 0-1
                            rgb[2]/=65536.0f; // convert to range 0-1
                            obj.setcolour(rgb);
                        }
                    } else if( strncmp(buff,"numVerts:",9)==0) {
                        nexpected=atoi(buff+9);
                        obj.readVerts(fp, nexpected);
                        nexpected=0;
                    } else if( strncmp(buff,"numFaces:",9)==0) {
                        nexpected=atoi(buff+9);
                        obj.readFaces(fp, nexpected);
                        nexpected=0;
                    } else if( strncmp(buff,"numEdges:",9)==0) {
                        nexpected=atoi(buff+9);
                        obj.readEdges(fp, nexpected);
                        //nrecs=0; // a numVerts is followed by nv vetex postiions
                    } else if( strncmp(buff,"numOpenings:",12)==0) {
                        nexpected=atoi(buff+12);
                        //nrecs=0; // a numVerts is followed by nv vetex postiions
                        if (nexpected>0) obj.readOpenings(fp, nexpected);
                    } else if( strncmp(buff,"UVW:",4)==0) { // texture application matrix
                        double mx[3][3];
                        sscanf(buff+4,"%lf %lf %lf %lf %lf %lf %lf %lf %lf",
                            &mx[0][0], &mx[0][1], &mx[0][2],
                            &mx[1][0], &mx[1][1], &mx[1][2],
                            &mx[2][0], &mx[2][1], &mx[2][2]);
                        
                        obj.settmat(Matrix(mx[0][0],mx[0][1],mx[0][2],0.0,
                                           mx[1][0],mx[1][1],mx[1][2],0.0,
                                           mx[2][0],mx[2][1],mx[2][2],0.0,
                                           0.0     ,0.0     ,0.0     ,1.0));
                    }
                }

            }
            fclose( fp );
            obj.buildDrawable(grp, options); // tidy up any remaining objects

            return grp;

        }
private:
};

int dwfgets(char *clin, int max, FILE *fin)
{ // replace fgets to detect EOL = char 13 as well as Creturn=10 GWM 111100
    // Macintosh produced files (such as those obtainable
    //from the great buildings site at www.Artifice.com) use 13 format, PC models use 10.
    int nread=0;
    char c1=1;
    do {
        if (!feof( fin )) {
            clin[nread]=c1=fgetc(fin);
            nread++;
        }
    } while (nread<max && c1!= 13 && c1!= 10 &&  feof( fin )== 0 );
    if (nread>0) clin[nread-1]='\0'; // null terminate and remove training blank
    return nread;
}

// now register with osg::Registry to instantiate the above
// reader/writer.
REGISTER_OSGPLUGIN(dw, ReaderWriterDW)