Trimline Class Reference

#include <trimline.h>

Collaboration diagram for Trimline:

Public Member Functions
	Trimline ()
	~Trimline ()
void	init (TrimVertex *)
void	init (long, Arc_ptr, long)
void	getNextPt (void)
void	getPrevPt (void)
void	getNextPts (REAL, Backend &)
void	getPrevPts (REAL, Backend &)
void	getNextPts (Arc_ptr)
void	getPrevPts (Arc_ptr)
TrimVertex *	next (void)
TrimVertex *	prev (void)
TrimVertex *	first (void)
TrimVertex *	last (void)

Private Member Functions
void	reset (void)
void	grow (long)
void	swap (void)
void	append (TrimVertex *)

Static Private Member Functions
static long	interpvert (TrimVertex *, TrimVertex *, TrimVertex *, REAL)

Private Attributes
TrimVertex **	pts
long	numverts
long	i
long	size
Jarcloc	jarcl
TrimVertex	t
TrimVertex	b
TrimVertex *	tinterp
TrimVertex *	binterp

Detailed Description

Definition at line 46 of file trimline.h.

Constructor & Destructor Documentation

Trimline()

Trimline::Trimline

(

)

Definition at line 46 of file trimline.cc.

{
    size = 0; pts = 0; numverts = 0;
    tinterp = &t; binterp = &b; 
}

~Trimline()

Trimline::~Trimline

(

)

Definition at line 52 of file trimline.cc.

{
    if( pts ) delete[] pts; 
}

Member Function Documentation

append()

void Trimline::append ( TrimVertex *  v )

inlineprivate

Definition at line 76 of file trimline.cc.

{
    assert( numverts != size ); 
    pts[numverts++] = v;
}

Referenced by getNextPts(), getPrevPts(), and init().

first()

TrimVertex * Trimline::first ( void  )

inline

Definition at line 93 of file trimline.h.

{
    i = 0; return pts[i]; 
}

Referenced by Hull::init().

getNextPt()

void Trimline::getNextPt

(

void

)

Definition at line 98 of file trimline.cc.

{
    *binterp = *jarcl.getnextpt();    
}

getNextPts() [1/2]

void Trimline::getNextPts

(

Arc_ptr

botarc

)

Definition at line 159 of file trimline.cc.

{
    reset(); swap(); append( tinterp );
 
#ifndef NDEBUG
    PwlArc *lastpwl = botarc->prev->pwlArc;
    TrimVertex *lastpt1 = &lastpwl->pts[lastpwl->npts-1];
#endif
    TrimVertex *lastpt2 = botarc->pwlArc->pts;
    TrimVertex *p = jarcl.getnextpt();
    for( append( p ); p != lastpt2; append( p ) ) {
    assert( p != lastpt1 );
    p = jarcl.getnextpt();
    }
}

getNextPts() [2/2]

void Trimline::getNextPts	(	REAL	vval,
		Backend &	backend
	)

Definition at line 115 of file trimline.cc.

{
    reset(); swap(); append( tinterp );
    assert( tinterp->param[1] >= vval );
 
    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();
}

getPrevPt()

void Trimline::getPrevPt

(

void

)

Definition at line 104 of file trimline.cc.

{
    *binterp = *jarcl.getprevpt();
}

getPrevPts() [1/2]

void Trimline::getPrevPts

(

Arc_ptr

botarc

)

Definition at line 176 of file trimline.cc.

{
    reset();  swap(); append( tinterp );
 
    PwlArc *lastpwl = botarc->prev->pwlArc;
    TrimVertex *lastpt1 = &lastpwl->pts[lastpwl->npts-1];
#ifndef NDEBUG
    TrimVertex *lastpt2 = botarc->pwlArc->pts;
#endif
 
    TrimVertex *q =  jarcl.getprevpt();
    for( append( q ); q != lastpt1; append( q ) ) {
    assert( q != lastpt2 );
    q = jarcl.getprevpt();
    }
}

getPrevPts() [2/2]

void Trimline::getPrevPts	(	REAL	vval,
		Backend &	backend
	)

Definition at line 137 of file trimline.cc.

{
    reset(); swap(); append( tinterp );
    assert( tinterp->param[1] >= vval );
 
    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();
}

grow()

void Trimline::grow ( long  npts )

inlineprivate

Definition at line 66 of file trimline.cc.

{
    if( size < npts ) {
    size = 2 * npts;
    if( pts ) delete[] pts; 
        pts = new TrimVertex_p[size];
    }
}

Referenced by init().

init() [1/2]

void Trimline::init	(	long	npts,
		Arc_ptr	jarc,
		long	last
	)

Definition at line 83 of file trimline.cc.

{
    jarcl.init( jarc, 0, last );
    grow( npts + 2 );
}

init() [2/2]

void Trimline::init

(

TrimVertex *

v

)

Definition at line 58 of file trimline.cc.

{
    reset();
    grow(1);
    append(v);
}

Referenced by Hull::init().

interpvert()

long Trimline::interpvert ( TrimVertex *  a, TrimVertex *  b, TrimVertex *  c, REAL  vval  )

staticprivate

Definition at line 195 of file trimline.cc.

{
    REAL denom = a->param[1] - b->param[1];
 
    if(denom != 0) {
    if( vval == a->param[1] ) {
        c->param[0] = a->param[0]; 
        c->param[1] = a->param[1];
        c->nuid = a->nuid;
        return 0;
    } else if( vval == b->param[1] ) {
        c->param[0] = b->param[0]; 
        c->param[1] = b->param[1];
        c->nuid = b->nuid;
        return 0;
    } else {
        REAL r = (a->param[1] - vval)/denom;
        c->param[0] =  a->param[0] - r * (a->param[0] - b->param[0]);
        c->param[1] = vval;
        return 1;
    }
    } else {
        c->param[0] = a->param[0]; 
        c->param[1] = a->param[1];
    c->nuid = a->nuid;
    return 0;
    }
}

Referenced by getNextPts(), and getPrevPts().

last()

TrimVertex * Trimline::last ( void  )

inline

Definition at line 99 of file trimline.h.

{
    i = numverts; return pts[--i]; 
}  

Referenced by getNextPts(), getPrevPts(), init(), and Hull::init().

next()

TrimVertex * Trimline::next ( void  )

inline

Definition at line 81 of file trimline.h.

{
    if( i < numverts) return pts[i++]; else return 0; 
} 

Referenced by Hull::nextlower(), and Hull::nextupper().

prev()

TrimVertex * Trimline::prev ( void  )

inline

Definition at line 87 of file trimline.h.

{
    if( i >= 0 ) return pts[i--]; else return 0; 
} 

Referenced by Hull::nextlower(), and Hull::nextupper().

reset()

void Trimline::reset ( void  )

inlineprivate

Definition at line 55 of file trimline.h.

{ numverts = 0; }

Referenced by getNextPts(), getPrevPts(), and init().

swap()

void Trimline::swap ( void  )

inlineprivate

Definition at line 90 of file trimline.cc.

{
    TrimVertex *tmp=tinterp; 
    tinterp=binterp; 
    binterp=tmp;
}

Referenced by getNextPts(), and getPrevPts().

Member Data Documentation

b

TrimVertex Trimline::b

private

Definition at line 53 of file trimline.h.

Referenced by Trimline().

binterp

TrimVertex * Trimline::binterp

private

Definition at line 54 of file trimline.h.

Referenced by getNextPt(), getNextPts(), getPrevPt(), getPrevPts(), swap(), and Trimline().

i

long Trimline::i

private

Definition at line 50 of file trimline.h.

Referenced by first(), last(), next(), and prev().

jarcl

Jarcloc Trimline::jarcl

private

Definition at line 52 of file trimline.h.

Referenced by getNextPt(), getNextPts(), getPrevPt(), getPrevPts(), and init().

numverts

long Trimline::numverts

private

Definition at line 49 of file trimline.h.

Referenced by append(), last(), next(), reset(), and Trimline().

pts

TrimVertex** Trimline::pts

private

Definition at line 48 of file trimline.h.

Referenced by append(), first(), grow(), last(), next(), prev(), Trimline(), and ~Trimline().

size

long Trimline::size

private

Definition at line 51 of file trimline.h.

Referenced by grow().

t

TrimVertex Trimline::t

private

Definition at line 53 of file trimline.h.

Referenced by Trimline().

tinterp

TrimVertex* Trimline::tinterp

private

Definition at line 54 of file trimline.h.

Referenced by getNextPts(), getPrevPts(), swap(), and Trimline().

---

The documentation for this class was generated from the following files:

• dll/opengl/glu32/src/libnurbs/internals/trimline.h
• dll/opengl/glu32/src/libnurbs/internals/trimline.cc