int main( int argc, char **argv )
{
if( argc != 2 )
{
cout << "*** Usage: readtest modelname\n";
return -1;
}
DLL_IGES model;
if( !model.Read( argv[1] ) )
{
cerr << "Oops - too bad, better luck next time\n";
}
else
{
cout << "[OK]: things are looking good\n";
}
model.Write( ONAME, true );
return 0;
}
DLL_IGES_ENTITY_124::DLL_IGES_ENTITY_124( DLL_IGES& aParent, bool create ) : DLL_IGES_ENTITY( aParent )
{
m_type = ENT_TRANSFORMATION_MATRIX;
IGES* ip = aParent.GetRawPtr();
if( !create || NULL == ip )
return;
ip->NewEntity( ENT_TRANSFORMATION_MATRIX, &m_entity );
if( NULL != m_entity )
m_entity->AttachValidFlag( &m_valid );
return;
}
DLL_IGES_ENTITY_126::DLL_IGES_ENTITY_126( DLL_IGES& aParent, bool create ) : DLL_IGES_CURVE( aParent )
{
m_type = ENT_NURBS_CURVE;
IGES* ip = aParent.GetRawPtr();
if( !create || NULL == ip )
return;
ip->NewEntity( ENT_NURBS_CURVE, &m_entity );
if( NULL != m_entity )
m_entity->AttachValidFlag( &m_valid );
return;
}
int main()
{
// instantiate the IGES data object
DLL_IGES model;
// Task A: creating a compound NURBS curve
// create a compound curve
DLL_IGES_ENTITY_102 compound( model, true );
// create a NURBS curve to add to the
DLL_IGES_ENTITY_126 nc( model, true );
double SQHALF = sqrt( 0.5 );
// knots for a circle
double cknots[] = { 0.0, 0.0, 0.0, 0.25, 0.25, 0.5, 0.5, 0.75, 0.75, 1.0, 1.0, 1.0 };
// first circle's control points
double cpts[] = { 1.0, 0.0, 0.0, 1.0,
1.0, 1.0, 0.0, SQHALF,
0.0, 1.0, 0.0, 1,
-1.0, 1.0, 0.0, SQHALF,
-1.0, 0.0, 0.0, 1,
-1.0, -1.0, 0.0, SQHALF,
0.0, -1.0, 0.0, 1,
1.0, -1.0, 0.0, SQHALF,
1.0, 0.0, 0.0, 1
};
// second circle's control points; the X and Y values are
// negated here so that the arc is drawn in a CW direction
// and is a projected reflection of the first arc along the Y axis
double cpts2[] = { -1.0, 0.0, -5.0, 1.0,
-1.0, -1.0, -5.0, SQHALF,
0.0, -1.0, -5.0, 1,
1.0, -1.0, -5.0, SQHALF,
1.0, 0.0, -5.0, 1,
1.0, 1.0, -5.0, SQHALF,
0.0, 1.0, -5.0, 1,
-1.0, 1.0, -5.0, SQHALF,
-1.0, 0.0, -5.0, 1
};
// create the first arc and add it to the compund curve
nc.SetNURBSData( 9, 3, cknots, cpts, true, 0.125, 1 );
compound.AddSegment( nc );
// create a NURBS line from the endpoint of the first circle to
// the start point of the second circle
double lknots[] = { 0.0, 0.0, 1.0, 1.0 };
double lpts[] = { 1.0, 0.0, 0.0,
1.0, 0.0, -5.0 };
nc.NewEntity();
nc.SetNURBSData( 2, 2, lknots, lpts, false, 0, 1.0 );
compound.AddSegment( nc );
// create a NURBS curve for the second arc
nc.NewEntity();
nc.SetNURBSData( 9, 3, cknots, cpts2, true, 0, 0.875 );
compound.AddSegment( nc );
// the second curve must also be accompanied by a transform
// so that the arc's start point coincides with the vertical
// line drawn from the first curve
DLL_IGES_ENTITY_124 tx0( model, true );
MCAD_TRANSFORM T;
T.T.x = 0.0;
T.T.z = -10.0; // 2 * Z(lower arc)
// set diagonal matrix to -1, +1, -1
T.R.v[0][0] = -1.0;
T.R.v[2][2] = -1.0;
tx0.SetRootTransform( T );
nc.SetTransform( tx0 );
// create the NURBS line from the end of ARC2 to
// the start of ARC1
double lpts2[] = { SQHALF, SQHALF, -5.0,
SQHALF, SQHALF, 0.0 };
nc.NewEntity();
nc.SetNURBSData( 2, 2, lknots, lpts2, false, 0, 1.0 );
compound.AddSegment( nc );
// create the Surface of Revolution;
// + create axis
// + create generatrix
// + set startAngle and endAngle
DLL_IGES_ENTITY_120 rev( model, true );
DLL_IGES_ENTITY_110 mline( model, true );
// axis
mline.SetLineStart( 0.0, 0.0, -5.0 );
mline.SetLineEnd( 0.0, 0.0, 0.0 );
rev.SetAxis( mline );
// generatrix
mline.NewEntity();
mline.SetLineStart( 1.0, 0.0, 0.0 );
mline.SetLineEnd( 1.0, 0.0, -5.0 );
rev.SetGeneratrix( mline );
rev.SetAngles( 0.0, 2.0 * M_PI );
// use the compound curve to define a surface boundary in model space
DLL_IGES_ENTITY_142 bound( model, true );
bound.SetModelSpaceBound( compound );
bound.SetCurveCreationFlag( CURVE_CREATE_PROJECTION );
bound.SetCurvePreference( BOUND_PREF_MODELSPACE );
bound.SetSurface( rev );
// create the Trimmed Parametric Surface (TPS)
DLL_IGES_ENTITY_144 surf( model, true );
surf.SetSurface( rev );
surf.SetBoundCurve( bound );
// create a custom color (magenta)
DLL_IGES_ENTITY_314 color( model, true );
color.SetColor( 100.0, 0.0, 100.0 );
// attach the color to the trimmed surface
surf.SetColor( color );
// create a NURBS plane
DLL_IGES_ENTITY_128 plane( model, true );
double ppts[] = { 1.0, 0.0, 0.0, 1.0, 0.0, -5.0,
SQHALF, SQHALF, 0.0, SQHALF, SQHALF, -5.0 };
plane.SetNURBSData( 2, 2, 2, 2, lknots, lknots, ppts, false, false, false, 0.0, 1.0, 0.0, 1.0 );
// add the plane to a TPS and add the color; we do not specify a
// bounding curve since the bounds of the plane section already
// form the desired boundary
surf.NewEntity();
surf.SetSurface( plane );
surf.SetColor( color );
// create a trimmed NURBS plane to cap the bottom of the cylinder
compound.NewEntity();
// arc segment
double cpts3[] = { 1.0, 0.0, -5.0, 1.0,
1.0, 1.0, -5.0, SQHALF,
0.0, 1.0, -5.0, 1,
-1.0, 1.0, -5.0, SQHALF,
-1.0, 0.0, -5.0, 1,
-1.0, -1.0, -5.0, SQHALF,
0.0, -1.0, -5.0, 1,
1.0, -1.0, -5.0, SQHALF,
1.0, 0.0, -5.0, 1
};
nc.NewEntity();
nc.SetNURBSData( 9, 3, cknots, cpts3, true, 0.125, 1 );
compound.AddSegment( nc );
// line segment, bottom
nc.NewEntity();
double lpts3[] = { 1.0, 0.0, -5.0,
SQHALF, SQHALF, -5.0 };
nc.SetNURBSData( 2, 2, lknots, lpts3, true, 0, 1 );
compound.AddSegment( nc );
// plane
plane.NewEntity();
double ppts2[] = { -1.0, -1.0, -5.0, 1.0, -1.0, -5.0,
-1.0, 1.0, -5.0, 1.0, 1.0, -5.0 };
plane.SetNURBSData( 2, 2, 2, 2, lknots, lknots, ppts2, false, false, false, 0.0, 1.0, 0.0, 1.0 );
// boundary
bound.NewEntity();
bound.SetModelSpaceBound( compound );
bound.SetSurface( plane );
// define the PTS
surf.NewEntity();
surf.SetSurface( plane );
surf.SetBoundCurve( bound );
surf.SetColor( color );
// create a trimmed NURBS plane to cap the top of the cylinder
compound.NewEntity();
// arc segment
nc.NewEntity();
nc.SetNURBSData( 9, 3, cknots, cpts, true, 0.125, 1 );
compound.AddSegment( nc );
// line segment, bottom
nc.NewEntity();
double lpts4[] = { 1.0, 0.0, 0.0,
SQHALF, SQHALF, 0.0 };
nc.SetNURBSData( 2, 2, lknots, lpts3, true, 0, 1 );
compound.AddSegment( nc );
// plane
plane.NewEntity();
double ppts3[] = { -1.0, -1.0, 0.0, 1.0, -1.0, 0.0,
-1.0, 1.0, 0.0, 1.0, 1.0, 0.0 };
plane.SetNURBSData( 2, 2, 2, 2, lknots, lknots, ppts3, false, false, false, 0.0, 1.0, 0.0, 1.0 );
// boundary
bound.NewEntity();
bound.SetModelSpaceBound( compound );
bound.SetSurface( plane );
// define the PTS
surf.NewEntity();
surf.SetSurface( plane );
surf.SetBoundCurve( bound );
surf.SetColor( color );
model.Write( "tutorial1.igs", true );
return 0;
}
