From b95d598323540ecb6dbbdcf00bbb5cf3fb22a78c Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Thu, 23 Aug 2012 16:39:20 -0700 Subject: Remove libGLU It's been moved to its own repository, found at http://cgit.freedesktop.org/mesa/glu/ Acked-by: Kenneth Graunke --- src/glu/sgi/libnurbs/internals/patch.cc | 504 -------------------------------- 1 file changed, 504 deletions(-) delete mode 100644 src/glu/sgi/libnurbs/internals/patch.cc (limited to 'src/glu/sgi/libnurbs/internals/patch.cc') diff --git a/src/glu/sgi/libnurbs/internals/patch.cc b/src/glu/sgi/libnurbs/internals/patch.cc deleted file mode 100644 index 808baa69e44..00000000000 --- a/src/glu/sgi/libnurbs/internals/patch.cc +++ /dev/null @@ -1,504 +0,0 @@ -/* -** 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 -#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; -} - -- cgit v1.2.3