From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- .../main/gfx/lib/glu/libnurbs/internals/patch.cc | 508 +++++++++++++++++++++ 1 file changed, 508 insertions(+) create mode 100644 nx-X11/extras/ogl-sample/main/gfx/lib/glu/libnurbs/internals/patch.cc (limited to 'nx-X11/extras/ogl-sample/main/gfx/lib/glu/libnurbs/internals/patch.cc') diff --git a/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libnurbs/internals/patch.cc b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libnurbs/internals/patch.cc new file mode 100644 index 000000000..d59054d33 --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libnurbs/internals/patch.cc @@ -0,0 +1,508 @@ +/* $XFree86$ */ +/* +** 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++ + * + * $Date: 2004/04/23 18:42:55 $ $Revision: 1.2 $ + * $Header: /cvs/xorg/xc/extras/ogl-sample/main/gfx/lib/glu/libnurbs/internals/patch.cc,v 1.2 2004/04/23 18:42:55 eich Exp $ + */ + +#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 abs function in ::singleStep(); +#include "gluint.h" + + +/*-------------------------------------------------------------------------- + * 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 = ::SQRT( (float) ss ); + REAL ssq = ::SQRT( (float) tt ); + REAL ds = ::SQRT( 4 * t2 * ttq / ( ss * ttq + st * ssq ) ); + REAL dt = ::SQRT( 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) ? ::SQRT( 2.0 * t2 / ssv[0] ) : pspec[0].range[2]; + pspec[0].sidestep[1] = (ssv[1] > scutoff) ? ::SQRT( 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) ? ::SQRT( 2.0 * t2 / ttv[0] ) : pspec[1].range[2]; + pspec[1].sidestep[1] = (ttv[1] > tcutoff) ? ::SQRT( 2.0 * t2 / ttv[1] ) : pspec[1].range[2]; + } else if( ss != 0.0 ) { + REAL x = pspec[1].range[2] * st; + REAL ds = ( ::SQRT( 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) ? ::SQRT( 2.0 * t2 / ssv[0] ) : pspec[0].range[2]; + pspec[0].sidestep[1] = (ssv[1] > scutoff) ? ::SQRT( 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 = ( ::SQRT( 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) ? ::SQRT( 2.0 * t2 / ttv[0] ) : pspec[1].range[2]; + pspec[1].sidestep[1] = (ttv[1] > tcutoff) ? ::SQRT( 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 = ::SQRT( area * pspec[0].range[2] / pspec[1].range[2] ); + REAL dt = ::SQRT( 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 * ::SQRT( d * pspec[0].range[2] / pspec[1].range[2] ); + REAL dt = t * ::SQRT( 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 + 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] = 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