void
Trimline::getPrevPts( REAL vval, Backend& backend )
{
reset(); swap(); append( tinterp );
assert( tinterp->param[1] >= vval );
register TrimVertex *q;
for( q=jarcl.getprevpt(); q->param[1] >= vval; q=jarcl.getprevpt() ) {
append( q );
}
/* compute and copy pointer to final point on right hull */
if( interpvert( q, last(), binterp, vval ) ) {
binterp->nuid = q->nuid;
backend.triangle( last(), binterp, q );
append( binterp );
}
jarcl.reverse();
(void) jarcl.getnextpt(); /* reset jarcl to proper position */
jarcl.reverse();
}
/*----------------------------------------------------------------------
* getNextPts - make arrays of pointers to trim points on left and right
* hulls of trim strip.
*----------------------------------------------------------------------
*/
void
Trimline::getNextPts( REAL vval, Backend& backend )
{
reset(); swap(); append( tinterp );
assert( tinterp->param[1] >= vval );
register TrimVertex *p;
for( p=jarcl.getnextpt() ; p->param[1] >= vval; p=jarcl.getnextpt() ) {
append( p );
}
/* compute and copy pointer to final point on left hull */
if( interpvert( last(), p, binterp, vval ) ) {
binterp->nuid = p->nuid;
backend.triangle( p, binterp, last() );
append( binterp );
}
jarcl.reverse();
(void) jarcl.getprevpt(); /* reset jarcl to proper position */
jarcl.reverse();
}
