int POLYGON::Stitch( bool isCCW, POLYGON& aPolygon, TRANSFORM& aTransform, VRMLMAT& aMaterial,
bool reuseMaterial, std::ofstream& aVRMLFile, int aTabDepth )
{
int i, j, k;
if( !valid )
{
ERRBLURB;
cerr << "invoked without prior invocation of Calc()\n";
return -1;
}
if( nv < 3 )
{
ERRBLURB;
cerr << "invalid number of vertices (" << nv << "); range is 3 .. 360\n";
return -1;
}
double* r2x = NULL;
double* r2y = NULL;
double* r2z = NULL;
int rv = aPolygon.GetVertices( &r2x, &r2y, &r2z );
if( rv != nv )
{
ERRBLURB;
cerr << "points in second ring (" << rv << ") do not match points in this ring (" << nv <<
")\n";
return -1;
}
if( aTabDepth < 0 )
aTabDepth = 0;
if( aTabDepth > 4 )
aTabDepth = 4;
double* lx;
double* ly;
double* lz;
// allocate memory
lx = new double[nv * 2];
if( lx == NULL )
{
ERRBLURB;
cerr << "could not allocate points for intermediate calculations\n";
return -1;
}
ly = new double[nv * 2];
if( ly == NULL )
{
ERRBLURB;
cerr << "could not allocate points for intermediate calculations\n";
delete [] lx;
return -1;
}
lz = new double[nv * 2];
if( lz == NULL )
{
ERRBLURB;
cerr << "could not allocate points for intermediate calculations\n";
delete [] lx;
delete [] ly;
return -1;
}
for( i = 0; i < nv; ++i )
{
lx[i] = x[i];
ly[i] = y[i];
lz[i] = z[i];
lx[i + nv] = r2x[i];
ly[i + nv] = r2y[i];
lz[i + nv] = r2z[i];
}
// perform transforms
aTransform.Transform( lx, ly, lz, nv * 2 );
// set up VRML Shape
SetupShape( aMaterial, reuseMaterial, aVRMLFile, aTabDepth );
// enumerate vertices
WriteCoord( lx, ly, lz, nv * 2, aVRMLFile, aTabDepth + 1 );
// enumerate facets
SetupCoordIndex( aVRMLFile, aTabDepth + 1 );
string fmt( (aTabDepth + 1) * 4, ' ' );
aVRMLFile << fmt << " ";
if( isCCW )
k = 1;
else
k = -1;
for( i = 0; i < nv - 1; ++i )
{
j = i + k;
if( j >= nv )
j -= nv;
if( j < 0 )
j += nv;
aVRMLFile << " " << i << "," << j << "," << j + nv << "," << i + nv << ",-1,";
if( !( (i + 1) % 4 ) )
aVRMLFile << "\n" << fmt << " ";
}
j = i + k;
if( j >= nv )
j -= nv;
if( j < 0 )
j += nv;
aVRMLFile << " " << i << "," << j << "," << j + nv << "," << i + nv << ",-1\n";
CloseCoordIndex( aVRMLFile, aTabDepth + 1 );
delete [] lx;
delete [] ly;
delete [] lz;
return CloseShape( aVRMLFile, aTabDepth );
}
