nurbstess.cc

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

	O_nurbscurve *ncurve, *next_ncurve;
	for( ncurve=curve->curve.o_nurbscurve; ncurve; ncurve=next_ncurve ) {
	    next_ncurve = ncurve->next;
	    if( ncurve->save == 0 )
		do_freenurbscurve( ncurve );
	    else
		ncurve->used = 0;
	}
    } else {
	O_pwlcurve *pcurve, *next_pcurve;
	for( pcurve=curve->curve.o_pwlcurve; pcurve; pcurve=next_pcurve ) {
	    next_pcurve = pcurve->next;
	    if( pcurve->save == 0 )
		do_freepwlcurve( pcurve );
	    else
		pcurve->used = 0;
	}
    }
    if( curve->save == 0 )
        do_freebgncurve( curve );
}


/*-----------------------------------------------------------------------------
 * do_freebgntrim - free the space allocated for a trim loop
 *
 * Client:
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_freebgntrim( O_trim *o_trim )
{ 
    o_trim->deleteMe( o_trimPool );
}


/*-----------------------------------------------------------------------------
 * do_bgntrim - link in a trim loop to the current trimmed surface description
 *
 * Client: bgntrim()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_bgntrim( O_trim *o_trim )
{

    if( ! inSurface ) {
	do_nurbserror( 15 );
	bgnsurface( 0 );
	inSurface = 2;
    }

    if( inTrim ) {
	do_nurbserror( 16 );
	endtrim();
    }
    inTrim = 1;

    if( *nextTrim != o_trim ) {
	isTrimModified = 1;	
        *nextTrim = o_trim;
    }

    currentTrim = o_trim;
    nextTrim = &(o_trim->next);
    nextCurve = &(o_trim->o_curve);
}


/*-----------------------------------------------------------------------------
 * do_endtrim - mark the end of the current trim loop 
 *
 * Client: endtrim()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_endtrim( void )
{
    if( ! inTrim ) {
	do_nurbserror( 17 );
	return;
    }
    inTrim = 0;

    if( currentTrim->o_curve == 0 ) {
	do_nurbserror( 18 );
	isDataValid = 0;
    }

    numTrims++;
   
    if( *nextCurve != 0 ) {
	isTrimModified = 1;
        *nextCurve = 0;	
    }
}

/*-----------------------------------------------------------------------------
 * do_freepwlcurve -
 * 
 * Client:
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_freepwlcurve( O_pwlcurve *o_pwlcurve )
{
    o_pwlcurve->deleteMe( o_pwlcurvePool );
}

void
NurbsTessellator::do_freebgncurve( O_curve *o_curve )
{
    o_curve->deleteMe( o_curvePool );
}

/*-----------------------------------------------------------------------------
 * do_pwlcurve - link in pwl trim loop to the current surface description
 * 
 * Client: pwlcurve()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_pwlcurve( O_pwlcurve *o_pwlcurve )
{
    if( ! inTrim ) {
	do_nurbserror( 19 );
	if( o_pwlcurve->save == 0 )
	    do_freepwlcurve(o_pwlcurve );
	return;
    }

    if( ! inCurve ) {
	bgncurve( 0 );
	inCurve = 2;
    }

    if( o_pwlcurve->used ) {
	do_nurbserror( 20 );
	isDataValid = 0;
	return;
    } else
        o_pwlcurve->used = 1;

    if( currentCurve->curvetype == ct_none ) {
        currentCurve->curvetype = ct_pwlcurve;
    } else if( currentCurve->curvetype != ct_pwlcurve ) {
	do_nurbserror( 21 );
	isDataValid = 0;
	return;
    }
	
    if( *nextPwlcurve != o_pwlcurve ) {
	isCurveModified = 1;
        *nextPwlcurve = o_pwlcurve;
    }
    nextPwlcurve = &(o_pwlcurve->next);

    if( o_pwlcurve->owner != currentCurve ) {
	isCurveModified = 1;
	o_pwlcurve->owner = currentCurve;
    }

    if( (inCurve == 2) ) 
	endcurve();
}


/*-----------------------------------------------------------------------------
 * do_freenurbscurve -
 * 
 * Client:
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_freenurbscurve( O_nurbscurve *o_nurbscurve )
{
    o_nurbscurve->bezier_curves->deleteMe( quiltPool );
    o_nurbscurve->deleteMe( o_nurbscurvePool );
}


/*-----------------------------------------------------------------------------
 * do_nurbscurve -
 * 
 * Client: nurbscurve() 
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_nurbscurve( O_nurbscurve *o_nurbscurve )
{
    if ( ! inCurve ) {
	bgncurve( 0 );
	inCurve = 2;
    }

    if( o_nurbscurve->used ) {
	/* error - curve was already called in current surface */
	do_nurbserror( 23 );
	isDataValid = 0;
	return;
    } else
        o_nurbscurve->used = 1;

    if( currentCurve->curvetype == ct_none ) {
        currentCurve->curvetype = ct_nurbscurve;
    } else if( currentCurve->curvetype != ct_nurbscurve ) {
	do_nurbserror( 24 );
	isDataValid = 0;
	return;
    }
	
    if( *nextNurbscurve != o_nurbscurve ) {
	isCurveModified = 1;
	*nextNurbscurve = o_nurbscurve;
    }

    nextNurbscurve = &(o_nurbscurve->next);

    if( o_nurbscurve->owner != currentCurve ) {
	isCurveModified = 1;
	o_nurbscurve->owner = currentCurve;
    }

    if( o_nurbscurve->owner == 0 )
	isCurveModified = 1;
    
    if( inCurve == 2 )
        endcurve();
}


/*-----------------------------------------------------------------------------
 * do_freenurbssurface -
 *
 * Client:
 *-----------------------------------------------------------------------------
 */

void
NurbsTessellator::do_freenurbssurface( O_nurbssurface *o_nurbssurface )
{
    o_nurbssurface->bezier_patches->deleteMe( quiltPool );
    o_nurbssurface->deleteMe( o_nurbssurfacePool );
}

/*-----------------------------------------------------------------------------
 * do_nurbssurface -
 * 
 * Client: nurbssurface()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_nurbssurface( O_nurbssurface *o_nurbssurface )
{
    if( ! inSurface ) {
	bgnsurface( 0 );
	inSurface = 2;
    }

    if( o_nurbssurface->used ) {
	/* error - surface was already called in current block */
	do_nurbserror( 25 );
	isDataValid = 0;
	return;
    } else
        o_nurbssurface->used = 1;

    if( *nextNurbssurface != o_nurbssurface ) {
	isSurfaceModified = 1;
        *nextNurbssurface  = o_nurbssurface;
    }

    if( o_nurbssurface->owner != currentSurface ) {
	isSurfaceModified = 1;
	o_nurbssurface->owner = currentSurface;
    }
    nextNurbssurface = &(o_nurbssurface->next);

    if( inSurface == 2  )
	endsurface();
}


/*-----------------------------------------------------------------------------
 * do_freenurbsproperty
 * 
 *-----------------------------------------------------------------------------
 */

void
NurbsTessellator::do_freenurbsproperty( Property *prop )
{
    prop->deleteMe( propertyPool );
}

    
/*-----------------------------------------------------------------------------
 * do_setnurbsproperty -
 * 
 *-----------------------------------------------------------------------------
 */

void
NurbsTessellator::do_setnurbsproperty( Property *prop )
{
    renderhints.setProperty( prop->tag, prop->value );
    if( prop->save == 0 )
	do_freenurbsproperty( prop );
}

void
NurbsTessellator::do_setnurbsproperty2( Property *prop )
{
    Mapdesc *mapdesc = maplist.find( prop->type );

    mapdesc->setProperty( prop->tag, prop->value );
    if( prop->save == 0 )
	do_freenurbsproperty( prop );
}

void
NurbsTessellator::errorHandler( int )
{
}

void
NurbsTessellator::do_nurbserror( int msg )
{
    errorHandler( msg );
}

int 
NurbsTessellator::do_check_knots( Knotvector *knots, const char *msg )
{
    int status = knots->validate();
    if( status ) {
	do_nurbserror( status );
        if( renderhints.errorchecking != N_NOMSG ) knots->show( msg );
    }
    return status;
}