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diff --git a/src/glu/sgi/libnurbs/internals/patch.cc b/src/glu/sgi/libnurbs/internals/patch.cc
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--- a/src/glu/sgi/libnurbs/internals/patch.cc
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-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * patch.c++
- *
- */
-
-#include <stdio.h>
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "mymath.h"
-#include "mystring.h"
-#include "patch.h"
-#include "mapdesc.h"
-#include "quilt.h"
-#include "nurbsconsts.h"
-#include "simplemath.h" //for glu_abs function in ::singleStep();
-
-
-/*--------------------------------------------------------------------------
- * Patch - copy patch from quilt and transform control points
- *--------------------------------------------------------------------------
- */
-
-Patch::Patch( Quilt_ptr geo, REAL *pta, REAL *ptb, Patch *n )
-{
-/* pspec[i].range is uninit here */
- mapdesc = geo->mapdesc;
- cullval = mapdesc->isCulling() ? CULL_ACCEPT : CULL_TRIVIAL_ACCEPT;
- notInBbox = mapdesc->isBboxSubdividing() ? 1 : 0;
- needsSampling = mapdesc->isRangeSampling() ? 1 : 0;
- pspec[0].order = geo->qspec[0].order;
- pspec[1].order = geo->qspec[1].order;
- pspec[0].stride = pspec[1].order * MAXCOORDS;
- pspec[1].stride = MAXCOORDS;
-
- /* transform control points to sampling and culling spaces */
- REAL *ps = geo->cpts;
- geo->select( pta, ptb );
- ps += geo->qspec[0].offset;
- ps += geo->qspec[1].offset;
- ps += geo->qspec[0].index * geo->qspec[0].order * geo->qspec[0].stride;
- ps += geo->qspec[1].index * geo->qspec[1].order * geo->qspec[1].stride;
-
- if( needsSampling ) {
- mapdesc->xformSampling( ps, geo->qspec[0].order, geo->qspec[0].stride,
- geo->qspec[1].order, geo->qspec[1].stride,
- spts, pspec[0].stride, pspec[1].stride );
- }
-
- if( cullval == CULL_ACCEPT ) {
- mapdesc->xformCulling( ps, geo->qspec[0].order, geo->qspec[0].stride,
- geo->qspec[1].order, geo->qspec[1].stride,
- cpts, pspec[0].stride, pspec[1].stride );
- }
-
- if( notInBbox ) {
- mapdesc->xformBounding( ps, geo->qspec[0].order, geo->qspec[0].stride,
- geo->qspec[1].order, geo->qspec[1].stride,
- bpts, pspec[0].stride, pspec[1].stride );
- }
-
- /* set scale range */
- pspec[0].range[0] = geo->qspec[0].breakpoints[geo->qspec[0].index];
- pspec[0].range[1] = geo->qspec[0].breakpoints[geo->qspec[0].index+1];
- pspec[0].range[2] = pspec[0].range[1] - pspec[0].range[0];
-
- pspec[1].range[0] = geo->qspec[1].breakpoints[geo->qspec[1].index];
- pspec[1].range[1] = geo->qspec[1].breakpoints[geo->qspec[1].index+1];
- pspec[1].range[2] = pspec[1].range[1] - pspec[1].range[0];
-
- // may need to subdivide to match range of sub-patch
- if( pspec[0].range[0] != pta[0] ) {
- assert( pspec[0].range[0] < pta[0] );
- Patch lower( *this, 0, pta[0], 0 );
- *this = lower;
- }
-
- if( pspec[0].range[1] != ptb[0] ) {
- assert( pspec[0].range[1] > ptb[0] );
- Patch upper( *this, 0, ptb[0], 0 );
- }
-
- if( pspec[1].range[0] != pta[1] ) {
- assert( pspec[1].range[0] < pta[1] );
- Patch lower( *this, 1, pta[1], 0 );
- *this = lower;
- }
-
- if( pspec[1].range[1] != ptb[1] ) {
- assert( pspec[1].range[1] > ptb[1] );
- Patch upper( *this, 1, ptb[1], 0 );
- }
- checkBboxConstraint();
- next = n;
-}
-
-/*--------------------------------------------------------------------------
- * Patch - subdivide a patch along an isoparametric line
- *--------------------------------------------------------------------------
- */
-
-Patch::Patch( Patch& upper, int param, REAL value, Patch *n )
-{
- Patch& lower = *this;
-
- lower.cullval = upper.cullval;
- lower.mapdesc = upper.mapdesc;
- lower.notInBbox = upper.notInBbox;
- lower.needsSampling = upper.needsSampling;
- lower.pspec[0].order = upper.pspec[0].order;
- lower.pspec[1].order = upper.pspec[1].order;
- lower.pspec[0].stride = upper.pspec[0].stride;
- lower.pspec[1].stride = upper.pspec[1].stride;
- lower.next = n;
-
- /* reset scale range */
- switch( param ) {
- case 0: {
- REAL d = (value-upper.pspec[0].range[0]) / upper.pspec[0].range[2];
- if( needsSampling )
- mapdesc->subdivide( upper.spts, lower.spts, d, pspec[1].order,
- pspec[1].stride, pspec[0].order, pspec[0].stride );
-
- if( cullval == CULL_ACCEPT )
- mapdesc->subdivide( upper.cpts, lower.cpts, d, pspec[1].order,
- pspec[1].stride, pspec[0].order, pspec[0].stride );
-
- if( notInBbox )
- mapdesc->subdivide( upper.bpts, lower.bpts, d, pspec[1].order,
- pspec[1].stride, pspec[0].order, pspec[0].stride );
-
- lower.pspec[0].range[0] = upper.pspec[0].range[0];
- lower.pspec[0].range[1] = value;
- lower.pspec[0].range[2] = value - upper.pspec[0].range[0];
- upper.pspec[0].range[0] = value;
- upper.pspec[0].range[2] = upper.pspec[0].range[1] - value;
-
- lower.pspec[1].range[0] = upper.pspec[1].range[0];
- lower.pspec[1].range[1] = upper.pspec[1].range[1];
- lower.pspec[1].range[2] = upper.pspec[1].range[2];
- break;
- }
- case 1: {
- REAL d = (value-upper.pspec[1].range[0]) / upper.pspec[1].range[2];
- if( needsSampling )
- mapdesc->subdivide( upper.spts, lower.spts, d, pspec[0].order,
- pspec[0].stride, pspec[1].order, pspec[1].stride );
- if( cullval == CULL_ACCEPT )
- mapdesc->subdivide( upper.cpts, lower.cpts, d, pspec[0].order,
- pspec[0].stride, pspec[1].order, pspec[1].stride );
- if( notInBbox )
- mapdesc->subdivide( upper.bpts, lower.bpts, d, pspec[0].order,
- pspec[0].stride, pspec[1].order, pspec[1].stride );
- lower.pspec[0].range[0] = upper.pspec[0].range[0];
- lower.pspec[0].range[1] = upper.pspec[0].range[1];
- lower.pspec[0].range[2] = upper.pspec[0].range[2];
-
- lower.pspec[1].range[0] = upper.pspec[1].range[0];
- lower.pspec[1].range[1] = value;
- lower.pspec[1].range[2] = value - upper.pspec[1].range[0];
- upper.pspec[1].range[0] = value;
- upper.pspec[1].range[2] = upper.pspec[1].range[1] - value;
- break;
- }
- }
-
- // inherit bounding box
- if( mapdesc->isBboxSubdividing() && ! notInBbox )
- memcpy( lower.bb, upper.bb, sizeof( bb ) );
-
- lower.checkBboxConstraint();
- upper.checkBboxConstraint();
-}
-
-/*--------------------------------------------------------------------------
- * clamp - clamp the sampling rate to a given maximum
- *--------------------------------------------------------------------------
- */
-
-void
-Patch::clamp( void )
-{
- if( mapdesc->clampfactor != N_NOCLAMPING ) {
- pspec[0].clamp( mapdesc->clampfactor );
- pspec[1].clamp( mapdesc->clampfactor );
- }
-}
-
-void
-Patchspec::clamp( REAL clampfactor )
-{
- if( sidestep[0] < minstepsize )
- sidestep[0] = clampfactor * minstepsize;
- if( sidestep[1] < minstepsize )
- sidestep[1] = clampfactor * minstepsize;
- if( stepsize < minstepsize )
- stepsize = clampfactor * minstepsize;
-}
-
-void
-Patch::checkBboxConstraint( void )
-{
- if( notInBbox &&
- mapdesc->bboxTooBig( bpts, pspec[0].stride, pspec[1].stride,
- pspec[0].order, pspec[1].order, bb ) != 1 ) {
- notInBbox = 0;
- }
-}
-
-void
-Patch::bbox( void )
-{
- if( mapdesc->isBboxSubdividing() )
- mapdesc->surfbbox( bb );
-}
-
-/*--------------------------------------------------------------------------
- * getstepsize - compute the sampling density across the patch
- * and determine if patch needs to be subdivided
- *--------------------------------------------------------------------------
- */
-
-void
-Patch::getstepsize( void )
-{
- pspec[0].minstepsize = pspec[1].minstepsize = 0;
- pspec[0].needsSubdivision = pspec[1].needsSubdivision = 0;
-
- if( mapdesc->isConstantSampling() ) {
- // fixed number of samples per patch in each direction
- // maxsrate is number of s samples per patch
- // maxtrate is number of t samples per patch
- pspec[0].getstepsize( mapdesc->maxsrate );
- pspec[1].getstepsize( mapdesc->maxtrate );
-
- } else if( mapdesc->isDomainSampling() ) {
- // maxsrate is number of s samples per unit s length of domain
- // maxtrate is number of t samples per unit t length of domain
- pspec[0].getstepsize( mapdesc->maxsrate * pspec[0].range[2] );
- pspec[1].getstepsize( mapdesc->maxtrate * pspec[1].range[2] );
-
- } else if( ! needsSampling ) {
- pspec[0].singleStep();
- pspec[1].singleStep();
- } else {
- // upper bound on path length between sample points
- REAL tmp[MAXORDER][MAXORDER][MAXCOORDS];
- const int trstride = sizeof(tmp[0]) / sizeof(REAL);
- const int tcstride = sizeof(tmp[0][0]) / sizeof(REAL);
-
- assert( pspec[0].order <= MAXORDER );
-
- /* points have been transformed, therefore they are homogeneous */
-
- int val = mapdesc->project( spts, pspec[0].stride, pspec[1].stride,
- &tmp[0][0][0], trstride, tcstride,
- pspec[0].order, pspec[1].order );
- if( val == 0 ) {
- // control points cross infinity, therefore partials are undefined
- pspec[0].getstepsize( mapdesc->maxsrate );
- pspec[1].getstepsize( mapdesc->maxtrate );
- } else {
- REAL t1 = mapdesc->getProperty( N_PIXEL_TOLERANCE );
-// REAL t2 = mapdesc->getProperty( N_ERROR_TOLERANCE );
- pspec[0].minstepsize = ( mapdesc->maxsrate > 0.0 ) ?
- (pspec[0].range[2] / mapdesc->maxsrate) : 0.0;
- pspec[1].minstepsize = ( mapdesc->maxtrate > 0.0 ) ?
- (pspec[1].range[2] / mapdesc->maxtrate) : 0.0;
- if( mapdesc->isParametricDistanceSampling() ||
- mapdesc->isObjectSpaceParaSampling() ) {
-
- REAL t2;
- t2 = mapdesc->getProperty( N_ERROR_TOLERANCE );
-
- // t2 is upper bound on the distance between surface and tessellant
- REAL ssv[2], ttv[2];
- REAL ss = mapdesc->calcPartialVelocity( ssv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 2, 0, pspec[0].range[2], pspec[1].range[2], 0 );
- REAL st = mapdesc->calcPartialVelocity( 0, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 1, 1, pspec[0].range[2], pspec[1].range[2], -1 );
- REAL tt = mapdesc->calcPartialVelocity( ttv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 0, 2, pspec[0].range[2], pspec[1].range[2], 1 );
- //make sure that ss st and tt are nonnegative:
- if(ss <0) ss = -ss;
- if(st <0) st = -st;
- if(tt <0) tt = -tt;
-
- if( ss != 0.0 && tt != 0.0 ) {
- /* printf( "ssv[0] %g ssv[1] %g ttv[0] %g ttv[1] %g\n",
- ssv[0], ssv[1], ttv[0], ttv[1] ); */
- REAL ttq = sqrtf( (float) ss );
- REAL ssq = sqrtf( (float) tt );
- REAL ds = sqrtf( 4 * t2 * ttq / ( ss * ttq + st * ssq ) );
- REAL dt = sqrtf( 4 * t2 * ssq / ( tt * ssq + st * ttq ) );
- pspec[0].stepsize = ( ds < pspec[0].range[2] ) ? ds : pspec[0].range[2];
- REAL scutoff = 2.0 * t2 / ( pspec[0].range[2] * pspec[0].range[2]);
- pspec[0].sidestep[0] = (ssv[0] > scutoff) ? sqrtf( 2.0 * t2 / ssv[0] ) : pspec[0].range[2];
- pspec[0].sidestep[1] = (ssv[1] > scutoff) ? sqrtf( 2.0 * t2 / ssv[1] ) : pspec[0].range[2];
-
- pspec[1].stepsize = ( dt < pspec[1].range[2] ) ? dt : pspec[1].range[2];
- REAL tcutoff = 2.0 * t2 / ( pspec[1].range[2] * pspec[1].range[2]);
- pspec[1].sidestep[0] = (ttv[0] > tcutoff) ? sqrtf( 2.0 * t2 / ttv[0] ) : pspec[1].range[2];
- pspec[1].sidestep[1] = (ttv[1] > tcutoff) ? sqrtf( 2.0 * t2 / ttv[1] ) : pspec[1].range[2];
- } else if( ss != 0.0 ) {
- REAL x = pspec[1].range[2] * st;
- REAL ds = ( sqrtf( x * x + 8.0 * t2 * ss ) - x ) / ss;
- pspec[0].stepsize = ( ds < pspec[0].range[2] ) ? ds : pspec[0].range[2];
- REAL scutoff = 2.0 * t2 / ( pspec[0].range[2] * pspec[0].range[2]);
- pspec[0].sidestep[0] = (ssv[0] > scutoff) ? sqrtf( 2.0 * t2 / ssv[0] ) : pspec[0].range[2];
- pspec[0].sidestep[1] = (ssv[1] > scutoff) ? sqrtf( 2.0 * t2 / ssv[1] ) : pspec[0].range[2];
- pspec[1].singleStep();
- } else if( tt != 0.0 ) {
- REAL x = pspec[0].range[2] * st;
- REAL dt = ( sqrtf( x * x + 8.0 * t2 * tt ) - x ) / tt;
- pspec[0].singleStep();
- REAL tcutoff = 2.0 * t2 / ( pspec[1].range[2] * pspec[1].range[2]);
- pspec[1].stepsize = ( dt < pspec[1].range[2] ) ? dt : pspec[1].range[2];
- pspec[1].sidestep[0] = (ttv[0] > tcutoff) ? sqrtf( 2.0 * t2 / ttv[0] ) : pspec[1].range[2];
- pspec[1].sidestep[1] = (ttv[1] > tcutoff) ? sqrtf( 2.0 * t2 / ttv[1] ) : pspec[1].range[2];
- } else {
- if( 4.0 * t2 > st * pspec[0].range[2] * pspec[1].range[2] ) {
- pspec[0].singleStep();
- pspec[1].singleStep();
- } else {
- REAL area = 4.0 * t2 / st;
- REAL ds = sqrtf( area * pspec[0].range[2] / pspec[1].range[2] );
- REAL dt = sqrtf( area * pspec[1].range[2] / pspec[0].range[2] );
- pspec[0].stepsize = ( ds < pspec[0].range[2] ) ? ds : pspec[0].range[2];
- pspec[0].sidestep[0] = pspec[0].range[2];
- pspec[0].sidestep[1] = pspec[0].range[2];
-
- pspec[1].stepsize = ( dt < pspec[1].range[2] ) ? dt : pspec[1].range[2];
- pspec[1].sidestep[0] = pspec[1].range[2];
- pspec[1].sidestep[1] = pspec[1].range[2];
- }
- }
- } else if( mapdesc->isPathLengthSampling() ||
- mapdesc->isObjectSpacePathSampling()) {
- // t1 is upper bound on path length
- REAL msv[2], mtv[2];
- REAL ms = mapdesc->calcPartialVelocity( msv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 1, 0, pspec[0].range[2], pspec[1].range[2], 0 );
- REAL mt = mapdesc->calcPartialVelocity( mtv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 0, 1, pspec[0].range[2], pspec[1].range[2], 1 );
- REAL side_scale = 1.0;
-
- if( ms != 0.0 ) {
- if( mt != 0.0 ) {
-/* REAL d = t1 / ( ms * ms + mt * mt );*/
-/* REAL ds = mt * d;*/
- REAL ds = t1 / (2.0*ms);
-/* REAL dt = ms * d;*/
- REAL dt = t1 / (2.0*mt);
- pspec[0].stepsize = ( ds < pspec[0].range[2] ) ? ds : pspec[0].range[2];
- pspec[0].sidestep[0] = ( msv[0] * pspec[0].range[2] > t1 ) ? (side_scale* t1 / msv[0]) : pspec[0].range[2];
- pspec[0].sidestep[1] = ( msv[1] * pspec[0].range[2] > t1 ) ? (side_scale* t1 / msv[1]) : pspec[0].range[2];
-
- pspec[1].stepsize = ( dt < pspec[1].range[2] ) ? dt : pspec[1].range[2];
- pspec[1].sidestep[0] = ( mtv[0] * pspec[1].range[2] > t1 ) ? (side_scale*t1 / mtv[0]) : pspec[1].range[2];
- pspec[1].sidestep[1] = ( mtv[1] * pspec[1].range[2] > t1 ) ? (side_scale*t1 / mtv[1]) : pspec[1].range[2];
- } else {
- pspec[0].stepsize = ( t1 < ms * pspec[0].range[2] ) ? (t1 / ms) : pspec[0].range[2];
- pspec[0].sidestep[0] = ( msv[0] * pspec[0].range[2] > t1 ) ? (t1 / msv[0]) : pspec[0].range[2];
- pspec[0].sidestep[1] = ( msv[1] * pspec[0].range[2] > t1 ) ? (t1 / msv[1]) : pspec[0].range[2];
-
- pspec[1].singleStep();
- }
- } else {
- if( mt != 0.0 ) {
- pspec[0].singleStep();
-
- pspec[1].stepsize = ( t1 < mt * pspec[1].range[2] ) ? (t1 / mt) : pspec[1].range[2];
- pspec[1].sidestep[0] = ( mtv[0] * pspec[1].range[2] > t1 ) ? (t1 / mtv[0]) : pspec[1].range[2];
- pspec[1].sidestep[1] = ( mtv[1] * pspec[1].range[2] > t1 ) ? (t1 / mtv[1]) : pspec[1].range[2];
- } else {
- pspec[0].singleStep();
- pspec[1].singleStep();
- }
- }
- } else if( mapdesc->isSurfaceAreaSampling() ) {
- // t is the square root of area
-/*
- REAL msv[2], mtv[2];
- REAL ms = mapdesc->calcPartialVelocity( msv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 1, 0, pspec[0].range[2], pspec[1].range[2], 0 );
- REAL mt = mapdesc->calcPartialVelocity( mtv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 0, 1, pspec[0].range[2], pspec[1].range[2], 1 );
- if( ms != 0.0 && mt != 0.0 ) {
- REAL d = 1.0 / (ms * mt);
- t *= M_SQRT2;
- REAL ds = t * sqrtf( d * pspec[0].range[2] / pspec[1].range[2] );
- REAL dt = t * sqrtf( d * pspec[1].range[2] / pspec[0].range[2] );
- pspec[0].stepsize = ( ds < pspec[0].range[2] ) ? ds : pspec[0].range[2];
- pspec[0].sidestep[0] = ( msv[0] * pspec[0].range[2] > t ) ? (t / msv[0]) : pspec[0].range[2];
- pspec[0].sidestep[1] = ( msv[1] * pspec[0].range[2] > t ) ? (t / msv[1]) : pspec[0].range[2];
-
- pspec[1].stepsize = ( dt < pspec[1].range[2] ) ? dt : pspec[1].range[2];
- pspec[1].sidestep[0] = ( mtv[0] * pspec[1].range[2] > t ) ? (t / mtv[0]) : pspec[1].range[2];
- pspec[1].sidestep[1] = ( mtv[1] * pspec[1].range[2] > t ) ? (t / mtv[1]) : pspec[1].range[2];
- } else {
- pspec[0].singleStep();
- pspec[1].singleStep();
- }
-*/
- } else {
- pspec[0].singleStep();
- pspec[1].singleStep();
- }
- }
- }
-
-#ifdef DEBUG
- _glu_dprintf( "sidesteps %g %g %g %g, stepsize %g %g\n",
- pspec[0].sidestep[0], pspec[0].sidestep[1],
- pspec[1].sidestep[0], pspec[1].sidestep[1],
- pspec[0].stepsize, pspec[1].stepsize );
-#endif
-
- if( mapdesc->minsavings != N_NOSAVINGSSUBDIVISION ) {
- REAL savings = 1./(pspec[0].stepsize * pspec[1].stepsize) ;
- savings-= (2./( pspec[0].sidestep[0] + pspec[0].sidestep[1] )) *
- (2./( pspec[1].sidestep[0] + pspec[1].sidestep[1] ));
-
- savings *= pspec[0].range[2] * pspec[1].range[2];
- if( savings > mapdesc->minsavings ) {
- pspec[0].needsSubdivision = pspec[1].needsSubdivision = 1;
- }
- }
-
- if( pspec[0].stepsize < pspec[0].minstepsize ) pspec[0].needsSubdivision = 1;
- if( pspec[1].stepsize < pspec[1].minstepsize ) pspec[1].needsSubdivision = 1;
- needsSampling = (needsSampling ? needsSamplingSubdivision() : 0);
-}
-
-void
-Patchspec::singleStep()
-{
- stepsize = sidestep[0] = sidestep[1] = glu_abs(range[2]);
-}
-
-void
-Patchspec::getstepsize( REAL max ) // max is number of samples for entire patch
-{
- stepsize = ( max >= 1.0 ) ? range[2] / max : range[2];
- if (stepsize < 0.0) {
- stepsize = -stepsize;
- }
- sidestep[0] = sidestep[1] = minstepsize = stepsize;
-}
-
-int
-Patch::needsSamplingSubdivision( void )
-{
- return (pspec[0].needsSubdivision || pspec[1].needsSubdivision) ? 1 : 0;
-}
-
-int
-Patch::needsNonSamplingSubdivision( void )
-{
- return notInBbox;
-}
-
-int
-Patch::needsSubdivision( int param )
-{
- return pspec[param].needsSubdivision;
-}
-
-int
-Patch::cullCheck( void )
-{
- if( cullval == CULL_ACCEPT )
- cullval = mapdesc->cullCheck( cpts, pspec[0].order, pspec[0].stride,
- pspec[1].order, pspec[1].stride );
- return cullval;
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 05:02:25 +0000