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Diffstat (limited to 'src/glu/sgi/libnurbs/internals/nurbstess.cc')
| -rw-r--r-- | src/glu/sgi/libnurbs/internals/nurbstess.cc | 693 |
1 files changed, 693 insertions, 0 deletions
diff --git a/src/glu/sgi/libnurbs/internals/nurbstess.cc b/src/glu/sgi/libnurbs/internals/nurbstess.cc new file mode 100644 index 0000000000..83c67fe834 --- /dev/null +++ b/src/glu/sgi/libnurbs/internals/nurbstess.cc @@ -0,0 +1,693 @@ +/* +** 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. +*/ + +/* + * nurbstess.c++ + * + * $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $ + * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/nurbstess.cc,v 1.1 2001/03/17 00:25:41 brianp Exp $ + */ + +#include "glimports.h" +#include "myassert.h" +#include "mysetjmp.h" +#include "mystdio.h" +#include "nurbsconsts.h" +#include "nurbstess.h" +#include "bufpool.h" +#include "quilt.h" +#include "knotvector.h" +#include "mapdesc.h" +#include "maplist.h" + +void +NurbsTessellator::set_domain_distance_u_rate(REAL u_rate) +{ + subdivider.set_domain_distance_u_rate(u_rate); +} + +void +NurbsTessellator::set_domain_distance_v_rate(REAL v_rate) +{ + subdivider.set_domain_distance_v_rate(v_rate); +} + +void +NurbsTessellator::set_is_domain_distance_sampling(int flag) +{ + subdivider.set_is_domain_distance_sampling(flag); +} + +void +NurbsTessellator::resetObjects( void ) +{ + subdivider.clear(); +} + +void +NurbsTessellator::makeobj( int ) +{ +#ifndef NDEBUG + dprintf( "makeobj\n" ); +#endif +} + +void +NurbsTessellator::closeobj( void ) +{ +#ifndef NDEBUG + dprintf( "closeobj\n" ); +#endif +} + +void +NurbsTessellator::bgnrender( void ) +{ +#ifndef NDEBUG + dprintf( "bgnrender\n" ); +#endif +} + +void +NurbsTessellator::endrender( void ) +{ +#ifndef NDEBUG + dprintf( "endrender\n" ); +#endif +} + +/*----------------------------------------------------------------------------- + * do_freebgnsurface - free o_surface structure + * + * Client: do_freeall(), bgnsurface() + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_freebgnsurface( O_surface *o_surface ) +{ + o_surface->deleteMe( o_surfacePool ); +} + + +/*----------------------------------------------------------------------------- + * do_bgnsurface - begin the display of a surface + * + * Client: bgnsurface() + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_bgnsurface( O_surface *o_surface ) +{ + if( inSurface ) { + do_nurbserror( 27 ); + endsurface(); + } + inSurface = 1; + + if( ! playBack ) bgnrender(); + + isTrimModified = 0; + isSurfaceModified = 0; + isDataValid = 1; + numTrims = 0; + currentSurface = o_surface; + nextTrim = &( currentSurface->o_trim ); + nextNurbssurface = &( currentSurface->o_nurbssurface ); +} + +/*----------------------------------------------------------------------------- + * do_bgncurve - begin the display of a curve + * + * Client: bgncurve() + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_bgncurve( O_curve *o_curve ) +{ + if ( inCurve ) { + do_nurbserror( 6 ); + endcurve(); + } + + inCurve = 1; + currentCurve = o_curve; + currentCurve->curvetype = ct_none; + + if( inTrim ) { + if( *nextCurve != o_curve ) { + isCurveModified = 1; + *nextCurve = o_curve; + } + } else { + if( ! playBack ) bgnrender(); + isDataValid = 1; + } + nextCurve = &(o_curve->next); + nextPwlcurve = &(o_curve->curve.o_pwlcurve); + nextNurbscurve = &(o_curve->curve.o_nurbscurve); +} + +/*----------------------------------------------------------------------------- + * do_endcurve - + * + * Client: endcurve() + *----------------------------------------------------------------------------- + */ + +void +NurbsTessellator::do_endcurve( void ) +{ + if( ! inCurve ) { + do_nurbserror( 7 ); + return; + } + inCurve = 0; + + *nextCurve = 0; + if (currentCurve->curvetype == ct_nurbscurve) + *nextNurbscurve = 0; + else + *nextPwlcurve = 0; + + if ( ! inTrim ) { + if( ! isDataValid ) { + do_freecurveall( currentCurve ); + return; + } + + int errval; + errval = ::mysetjmp( jumpbuffer ); + if( errval == 0 ) { + if( currentCurve->curvetype == ct_nurbscurve ) { + subdivider.beginQuilts(); + for( O_nurbscurve *n = currentCurve->curve.o_nurbscurve; n != 0; n = n->next ) + subdivider.addQuilt( n->bezier_curves ); + subdivider.endQuilts(); + subdivider.drawCurves(); + if( ! playBack ) endrender(); + } else { + /* XXX */ + if( ! playBack ) endrender(); + /*do_draw_pwlcurve( currentCurve->curve.o_pwlcurve ) */; + do_nurbserror( 9 ); + } + } else { + if( ! playBack ) endrender(); + do_nurbserror( errval ); + } + do_freecurveall( currentCurve ); + resetObjects(); + } +} + +/*----------------------------------------------------------------------------- + * do_endsurface - mark end of surface, display surface, free immediate data + * + * Client: + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_endsurface( void ) +{ + if( inTrim ) { + do_nurbserror( 12 ); + endtrim(); + } + + if( ! inSurface ) { + do_nurbserror( 13 ); + return; + } + inSurface = 0; + + *nextNurbssurface = 0; + + if( ! isDataValid ) { + do_freeall( ); + return; + } + + if( *nextTrim != 0 ) { + isTrimModified = 1; + *nextTrim = 0; + } + + int errval; + + errval = ::mysetjmp( jumpbuffer ); + if( errval == 0 ) { + if( numTrims > 0 ) { + + subdivider.beginTrims(); + for( O_trim *trim = currentSurface->o_trim; trim; trim = trim->next ) { + subdivider.beginLoop(); + for( O_curve *curve = trim->o_curve; curve; curve = curve->next ) { + curve->used = 0; + assert( curve->curvetype != ct_none ); + if (curve->curvetype == ct_pwlcurve) { + O_pwlcurve *c = curve->curve.o_pwlcurve; + subdivider.addArc( c->npts, c->pts, curve->nuid ); + } else { + Quilt *quilt = curve->curve.o_nurbscurve->bezier_curves; + Quiltspec *qspec = quilt->qspec; + REAL *cpts = quilt->cpts + qspec->offset; + REAL *cptsend = cpts + (qspec->width * qspec->order * qspec->stride); + for( ; cpts != cptsend; cpts += qspec->order*qspec->stride ) + subdivider.addArc( cpts, quilt, curve->nuid ); + } + } + subdivider.endLoop(); + } + subdivider.endTrims(); + } + + subdivider.beginQuilts(); + for( O_nurbssurface *n = currentSurface->o_nurbssurface; n; n = n->next ) + subdivider.addQuilt( n->bezier_patches ); + subdivider.endQuilts(); + subdivider.drawSurfaces( currentSurface->nuid ); + if( ! playBack ) endrender(); + } else { + if( ! playBack ) endrender(); + do_nurbserror( errval ); + } + + do_freeall( ); + resetObjects(); +} + +/*----------------------------------------------------------------------------- + * do_freeall - free all data allocated in immediate mode + * + * Client: + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_freeall( void ) +{ + for( O_trim *o_trim = currentSurface->o_trim; o_trim; ) { + O_trim *next_o_trim = o_trim->next; + for( O_curve *curve = o_trim->o_curve; curve; ) { + O_curve *next_o_curve = curve->next; + do_freecurveall( curve ); + curve = next_o_curve; + } + if( o_trim->save == 0 ) do_freebgntrim( o_trim ); + o_trim = next_o_trim; + } + + O_nurbssurface *nurbss, *next_nurbss; + for( nurbss= currentSurface->o_nurbssurface; nurbss; nurbss = next_nurbss) { + next_nurbss = nurbss->next; + if( nurbss->save == 0 ) + do_freenurbssurface( nurbss ); + else + nurbss->used = 0; + } + + if( currentSurface->save == 0 ) do_freebgnsurface( currentSurface ); +} + +void +NurbsTessellator::do_freecurveall( O_curve *curve ) +{ + assert( curve->curvetype != ct_none ); + + if( curve->curvetype == ct_nurbscurve ) { + O_nurbscurve *ncurve, *next_ncurve; + for( ncurve=curve->curve.o_nurbscurve; ncurve; ncurve=next_ncurve ) { + next_ncurve = ncurve->next; + if( ncurve->save == 0 ) + do_freenurbscurve( ncurve ); + else + ncurve->used = 0; + } + } else { + O_pwlcurve *pcurve, *next_pcurve; + for( pcurve=curve->curve.o_pwlcurve; pcurve; pcurve=next_pcurve ) { + next_pcurve = pcurve->next; + if( pcurve->save == 0 ) + do_freepwlcurve( pcurve ); + else + pcurve->used = 0; + } + } + if( curve->save == 0 ) + do_freebgncurve( curve ); +} + + +/*----------------------------------------------------------------------------- + * do_freebgntrim - free the space allocated for a trim loop + * + * Client: + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_freebgntrim( O_trim *o_trim ) +{ + o_trim->deleteMe( o_trimPool ); +} + + +/*----------------------------------------------------------------------------- + * do_bgntrim - link in a trim loop to the current trimmed surface description + * + * Client: bgntrim() + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_bgntrim( O_trim *o_trim ) +{ + + if( ! inSurface ) { + do_nurbserror( 15 ); + bgnsurface( 0 ); + inSurface = 2; + } + + if( inTrim ) { + do_nurbserror( 16 ); + endtrim(); + } + inTrim = 1; + + if( *nextTrim != o_trim ) { + isTrimModified = 1; + *nextTrim = o_trim; + } + + currentTrim = o_trim; + nextTrim = &(o_trim->next); + nextCurve = &(o_trim->o_curve); +} + + +/*----------------------------------------------------------------------------- + * do_endtrim - mark the end of the current trim loop + * + * Client: endtrim() + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_endtrim( void ) +{ + if( ! inTrim ) { + do_nurbserror( 17 ); + return; + } + inTrim = 0; + + if( currentTrim->o_curve == 0 ) { + do_nurbserror( 18 ); + isDataValid = 0; + } + + numTrims++; + + if( *nextCurve != 0 ) { + isTrimModified = 1; + *nextCurve = 0; + } +} + +/*----------------------------------------------------------------------------- + * do_freepwlcurve - + * + * Client: + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_freepwlcurve( O_pwlcurve *o_pwlcurve ) +{ + o_pwlcurve->deleteMe( o_pwlcurvePool ); +} + +void +NurbsTessellator::do_freebgncurve( O_curve *o_curve ) +{ + o_curve->deleteMe( o_curvePool ); +} + +/*----------------------------------------------------------------------------- + * do_pwlcurve - link in pwl trim loop to the current surface description + * + * Client: pwlcurve() + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_pwlcurve( O_pwlcurve *o_pwlcurve ) +{ + if( ! inTrim ) { + do_nurbserror( 19 ); + if( o_pwlcurve->save == 0 ) + do_freepwlcurve(o_pwlcurve ); + return; + } + + if( ! inCurve ) { + bgncurve( 0 ); + inCurve = 2; + } + + if( o_pwlcurve->used ) { + do_nurbserror( 20 ); + isDataValid = 0; + return; + } else + o_pwlcurve->used = 1; + + if( currentCurve->curvetype == ct_none ) { + currentCurve->curvetype = ct_pwlcurve; + } else if( currentCurve->curvetype != ct_pwlcurve ) { + do_nurbserror( 21 ); + isDataValid = 0; + return; + } + + if( *nextPwlcurve != o_pwlcurve ) { + isCurveModified = 1; + *nextPwlcurve = o_pwlcurve; + } + nextPwlcurve = &(o_pwlcurve->next); + + if( o_pwlcurve->owner != currentCurve ) { + isCurveModified = 1; + o_pwlcurve->owner = currentCurve; + } + + if( (inCurve == 2) ) + endcurve(); +} + + +/*----------------------------------------------------------------------------- + * do_freenurbscurve - + * + * Client: + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_freenurbscurve( O_nurbscurve *o_nurbscurve ) +{ + o_nurbscurve->bezier_curves->deleteMe( quiltPool ); + o_nurbscurve->deleteMe( o_nurbscurvePool ); +} + + +/*----------------------------------------------------------------------------- + * do_nurbscurve - + * + * Client: nurbscurve() + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_nurbscurve( O_nurbscurve *o_nurbscurve ) +{ + if ( ! inCurve ) { + bgncurve( 0 ); + inCurve = 2; + } + + if( o_nurbscurve->used ) { + /* error - curve was already called in current surface */ + do_nurbserror( 23 ); + isDataValid = 0; + return; + } else + o_nurbscurve->used = 1; + + if( currentCurve->curvetype == ct_none ) { + currentCurve->curvetype = ct_nurbscurve; + } else if( currentCurve->curvetype != ct_nurbscurve ) { + do_nurbserror( 24 ); + isDataValid = 0; + return; + } + + if( *nextNurbscurve != o_nurbscurve ) { + isCurveModified = 1; + *nextNurbscurve = o_nurbscurve; + } + + nextNurbscurve = &(o_nurbscurve->next); + + if( o_nurbscurve->owner != currentCurve ) { + isCurveModified = 1; + o_nurbscurve->owner = currentCurve; + } + + if( o_nurbscurve->owner == 0 ) + isCurveModified = 1; + + if( inCurve == 2 ) + endcurve(); +} + + +/*----------------------------------------------------------------------------- + * do_freenurbssurface - + * + * Client: + *----------------------------------------------------------------------------- + */ + +void +NurbsTessellator::do_freenurbssurface( O_nurbssurface *o_nurbssurface ) +{ + o_nurbssurface->bezier_patches->deleteMe( quiltPool ); + o_nurbssurface->deleteMe( o_nurbssurfacePool ); +} + +/*----------------------------------------------------------------------------- + * do_nurbssurface - + * + * Client: nurbssurface() + *----------------------------------------------------------------------------- + */ +void +NurbsTessellator::do_nurbssurface( O_nurbssurface *o_nurbssurface ) +{ + if( ! inSurface ) { + bgnsurface( 0 ); + inSurface = 2; + } + + if( o_nurbssurface->used ) { + /* error - surface was already called in current block */ + do_nurbserror( 25 ); + isDataValid = 0; + return; + } else + o_nurbssurface->used = 1; + + if( *nextNurbssurface != o_nurbssurface ) { + isSurfaceModified = 1; + *nextNurbssurface = o_nurbssurface; + } + + if( o_nurbssurface->owner != currentSurface ) { + isSurfaceModified = 1; + o_nurbssurface->owner = currentSurface; + } + nextNurbssurface = &(o_nurbssurface->next); + + if( inSurface == 2 ) + endsurface(); +} + + +/*----------------------------------------------------------------------------- + * do_freenurbsproperty + * + *----------------------------------------------------------------------------- + */ + +void +NurbsTessellator::do_freenurbsproperty( Property *prop ) +{ + prop->deleteMe( propertyPool ); +} + + +/*----------------------------------------------------------------------------- + * do_setnurbsproperty - + * + *----------------------------------------------------------------------------- + */ + +void +NurbsTessellator::do_setnurbsproperty( Property *prop ) +{ + renderhints.setProperty( prop->tag, prop->value ); + if( prop->save == 0 ) + do_freenurbsproperty( prop ); +} + +void +NurbsTessellator::do_setnurbsproperty2( Property *prop ) +{ + Mapdesc *mapdesc = maplist.find( prop->type ); + + mapdesc->setProperty( prop->tag, prop->value ); + if( prop->save == 0 ) + do_freenurbsproperty( prop ); +} + +void +NurbsTessellator::errorHandler( int ) +{ +} + +void +NurbsTessellator::do_nurbserror( int msg ) +{ + errorHandler( msg ); +} + +int +NurbsTessellator::do_check_knots( Knotvector *knots, char *msg ) +{ + int status = knots->validate(); + if( status ) { + do_nurbserror( status ); + if( renderhints.errorchecking != N_NOMSG ) knots->show( msg ); + } + return status; +} + + + + + |